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craighaywo |
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-- Company:
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-- Engineer:
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--
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-- Create Date: 21:09:04 12/10/2014
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-- Design Name:
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-- Module Name: eth_mod - Behavioral
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-- Project Name:
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-- Target Devices:
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-- Tool versions:
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-- Description:
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--
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-- Dependencies:
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--
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-- Revision:
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-- Revision 0.01 - File Created
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-- Additional Comments:
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--
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-- TODO: Have 'G_ENABLE_DHCP' Generic and comment all statements that rely on dhcp with '#ifdef end'
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-- TODO: Get correct version of 'sf.conf' and add it to repository
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--
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----------------------------------------------------------------------------------
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library IEEE;
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use IEEE.STD_LOGIC_1164.ALL;
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use IEEE.NUMERIC_STD.ALL;
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-- Uncomment the following library declaration if instantiating
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-- any Xilinx primitives in this code.
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--library UNISIM;
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--use UNISIM.VComponents.all;
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entity eth_mod is
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Generic ( G_FUNCTION :string :="client" );
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Port (
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CLK_IN : in STD_LOGIC;
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CLK_1HZ_IN : in STD_LOGIC;
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-- Command interface
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INIT_ENC28J60 : in STD_LOGIC;
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DHCP_CONNECT : in STD_LOGIC;
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ERROR_OUT : out STD_LOGIC_VECTOR (7 downto 0);
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-- Debug Interface
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DEBUG_IN : in STD_LOGIC_VECTOR(2 downto 0);
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DEBUG_OUT : out STD_LOGIC_VECTOR (15 downto 0);
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-- TCP Connection Interface
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TCP_CONNECTION_ACTIVE_OUT : out STD_LOGIC;
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TCP_RD_DATA_AVAIL_OUT : out STD_LOGIC;
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TCP_RD_DATA_EN_IN : in STD_LOGIC;
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TCP_RD_DATA_OUT : out STD_LOGIC_VECTOR (7 downto 0);
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TCP_WR_DATA_POSSIBLE_OUT : out STD_LOGIC;
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TCP_WR_DATA_EN_IN : in STD_LOGIC;
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TCP_WR_DATA_FLUSH_IN : in STD_LOGIC;
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TCP_WR_DATA_IN : in STD_LOGIC_VECTOR (7 downto 0);
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-- Eth SPI interface
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SDI_OUT : out STD_LOGIC;
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SDO_IN : in STD_LOGIC;
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SCLK_OUT : out STD_LOGIC;
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CS_OUT : out STD_LOGIC );
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end eth_mod;
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architecture Behavioral of eth_mod is
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COMPONENT spi_mod
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Port ( CLK_IN : in STD_LOGIC;
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RST_IN : in STD_LOGIC;
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WR_CONTINUOUS_IN : in STD_LOGIC;
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WE_IN : in STD_LOGIC;
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WR_ADDR_IN : in STD_LOGIC_VECTOR (7 downto 0);
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WR_DATA_IN : in STD_LOGIC_VECTOR (7 downto 0);
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WR_DATA_CMPLT_OUT : out STD_LOGIC;
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RD_CONTINUOUS_IN : in STD_LOGIC;
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RD_IN : in STD_LOGIC;
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RD_WIDTH_IN : in STD_LOGIC;
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RD_ADDR_IN : in STD_LOGIC_VECTOR (7 downto 0);
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RD_DATA_OUT : out STD_LOGIC_VECTOR (7 downto 0);
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RD_DATA_CMPLT_OUT : out STD_LOGIC;
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SLOW_CS_EN_IN : in STD_LOGIC;
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OPER_CMPLT_POST_CS_OUT : out STD_LOGIC;
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SDI_OUT : out STD_LOGIC;
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SDO_IN : in STD_LOGIC;
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SCLK_OUT : out STD_LOGIC;
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CS_OUT : out STD_LOGIC);
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END COMPONENT;
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COMPONENT checksum_calc
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Port ( CLK_IN : in STD_LOGIC;
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RST_IN : in STD_LOGIC;
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CHECKSUM_CALC_IN : in STD_LOGIC;
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START_ADDR_IN : in STD_LOGIC_VECTOR (10 downto 0);
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COUNT_IN : in STD_LOGIC_VECTOR (10 downto 0);
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VALUE_IN : in STD_LOGIC_VECTOR (7 downto 0);
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VALUE_ADDR_OUT : out STD_LOGIC_VECTOR (10 downto 0);
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CHECKSUM_INIT_IN : in STD_LOGIC_VECTOR (15 downto 0);
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CHECKSUM_SET_INIT_IN : in STD_LOGIC;
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CHECKSUM_ODD_LENGTH_IN : in STD_LOGIC;
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CHECKSUM_OUT : out STD_LOGIC_VECTOR (15 downto 0);
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CHECKSUM_DONE_OUT : out STD_LOGIC);
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END COMPONENT;
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COMPONENT TCP_FIFO
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PORT (
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clk : IN STD_LOGIC;
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din : IN STD_LOGIC_VECTOR(7 DOWNTO 0);
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wr_en : IN STD_LOGIC;
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rd_en : IN STD_LOGIC;
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dout : OUT STD_LOGIC_VECTOR(7 DOWNTO 0);
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full : OUT STD_LOGIC;
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almost_full : OUT STD_LOGIC;
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empty : OUT STD_LOGIC;
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data_count : OUT STD_LOGIC_VECTOR(11 DOWNTO 0));
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END COMPONENT;
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COMPONENT lfsr32_mod
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Port ( CLK_IN : in STD_LOGIC;
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SEED_IN : in STD_LOGIC_VECTOR(31 downto 0);
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SEED_EN_IN : in STD_LOGIC;
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VAL_OUT : out STD_LOGIC_VECTOR(31 downto 0));
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END COMPONENT;
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COMPONENT TDP_RAM
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Generic (G_DATA_A_SIZE :natural :=32;
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G_ADDR_A_SIZE :natural :=9;
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G_RELATION :natural :=3;
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G_INIT_ZERO :boolean := true;
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G_INIT_FILE :string :="");--log2(SIZE_A/SIZE_B)
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Port ( CLK_A_IN : in STD_LOGIC;
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WE_A_IN : in STD_LOGIC;
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ADDR_A_IN : in STD_LOGIC_VECTOR (G_ADDR_A_SIZE-1 downto 0);
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DATA_A_IN : in STD_LOGIC_VECTOR (G_DATA_A_SIZE-1 downto 0);
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DATA_A_OUT : out STD_LOGIC_VECTOR (G_DATA_A_SIZE-1 downto 0);
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CLK_B_IN : in STD_LOGIC;
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WE_B_IN : in STD_LOGIC;
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ADDR_B_IN : in STD_LOGIC_VECTOR (G_ADDR_A_SIZE+G_RELATION-1 downto 0);
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DATA_B_IN : in STD_LOGIC_VECTOR (G_DATA_A_SIZE/(2**G_RELATION)-1 downto 0);
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DATA_B_OUT : out STD_LOGIC_VECTOR (G_DATA_A_SIZE/(2**G_RELATION)-1 downto 0));
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END COMPONENT;
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COMPONENT Packet_Definition
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PORT (
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clka : IN STD_LOGIC;
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addra : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
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douta : OUT STD_LOGIC_VECTOR(15 DOWNTO 0));
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END COMPONENT;
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subtype slv is std_logic_vector;
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constant C_250us : unsigned(15 downto 0) := X"61A8";
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constant C_200ms : unsigned(24 downto 0) := '1'&X"312D00";
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constant C_100ms : unsigned(23 downto 0) := X"989680";
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constant C_20ms : unsigned(20 downto 0) := '1'&X"E8480";
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constant C_init_cmnds_start_addr : std_logic_vector(7 downto 0) := X"01";
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constant C_init_cmnds_max_addr : std_logic_vector(7 downto 0) := X"7F";
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constant C_arp_reply_frame_addr : std_logic_vector(10 downto 0) := "000"&X"80";
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constant C_icmp_reply_frame_addr : std_logic_vector(10 downto 0) := "000"&X"AB";
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constant C_dhcp_discover_frame_addr : std_logic_vector(10 downto 0) := "001"&X"24";
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constant C_dhcp_request_frame_addr : std_logic_vector(10 downto 0) := "010"&X"86";
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constant C_arp_request_frame_addr : std_logic_vector(10 downto 0) := "100"&X"67";
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constant C_tcp_packet_frame_addr : std_logic_vector(10 downto 0) := "100"&X"92";
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constant C_tcp_tx_packet_frame_addr : std_logic_vector(10 downto 0) := "100"&X"F4";
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constant C_arp_reply_length : std_logic_vector(15 downto 0) := X"002A";
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constant C_icmp_reply_length : std_logic_vector(15 downto 0) := X"0062";
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constant C_dhcp_discover_length : std_logic_vector(15 downto 0) := X"0156";
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constant C_dhcp_request_length : std_logic_vector(15 downto 0) := X"015C";
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constant C_arp_request_length : std_logic_vector(15 downto 0) := X"002A";
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constant C_tcp_packet_length : std_logic_vector(15 downto 0) := X"0042";
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constant C_ARP_Packet_Type : std_logic_vector(15 downto 0) := X"0806";
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constant C_IP_Packet_Type : std_logic_vector(15 downto 0) := X"0800";
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constant C_ICMP_Protocol_Number : std_logic_vector(7 downto 0) := X"01";
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constant C_UDP_Protocol_Number : std_logic_vector(7 downto 0) := X"11";
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constant C_TCP_Protocol_Number : std_logic_vector(7 downto 0) := X"06";
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constant C_IPV4_Protocol_Number : std_logic_vector(3 downto 0) := X"4";
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constant C_DHCP_Source_Port : std_logic_vector(15 downto 0) := X"0043";
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constant C_DHCP_Dest_Port : std_logic_vector(15 downto 0) := X"0044";
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constant C_dhcp_magic_cookie : std_logic_vector(31 downto 0) := X"63825363";
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constant C_tcp_syn_ack_flags : std_logic_vector(7 downto 0) := X"12";
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constant C_tcp_syn_flags : std_logic_vector(7 downto 0) := X"02";
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constant C_tcp_ack_flags : std_logic_vector(7 downto 0) := X"10";
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constant C_tcp_fin_ack_flags : std_logic_vector(7 downto 0) := X"11";
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constant C_tcp_psh_ack_flags : std_logic_vector(7 downto 0) := X"18";
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constant C_ICMP_Ping_Length : std_logic_vector(15 downto 0) := X"0054";
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constant C_ARP_Request : std_logic_vector(7 downto 0) := X"01";
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constant C_ARP_Reply : std_logic_vector(7 downto 0) := X"02";
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constant C_rx_pointer_min : unsigned(15 downto 0) := X"0000";
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constant C_rx_pointer_max : unsigned(15 downto 0) := X"0FFF";
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constant C_tx_base_addr1 : unsigned(15 downto 0) := X"1000";
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constant C_tx_base_addr2 : unsigned(15 downto 0) := X"1800";
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signal spi_we, spi_wr_continuous, spi_wr_cmplt, spi_rd_continuous : std_logic := '0';
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signal spi_rd, spi_rd_width, spi_rd_cmplt, spi_oper_cmplt : std_logic := '0';
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signal spi_wr_addr, spi_wr_data, spi_rd_addr, spi_data_rd : std_logic_vector(7 downto 0) := (others => '0');
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signal frame_addr : std_logic_vector(10 downto 0);
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signal frame_data : std_logic_vector(15 downto 0);
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signal frame_data_rd, frame_rd_cmplt, slow_cs_en : std_logic := '0';
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signal network_interface_enabled : std_logic := '0';
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signal command_cmplt, command_trig, command_en_in_p : std_logic := '0';
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signal init_cmnd_addr : unsigned(7 downto 0);
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signal interrupt_counter : unsigned(15 downto 0) := (others => '0');
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signal next_packet_pointer : std_logic_vector(15 downto 0) := (others => '0');
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signal previous_packet_pointer : unsigned(15 downto 0) := (others => '0');
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signal eir_register : std_logic_vector(7 downto 0) := (others => '0');
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signal rx_packet_ram_we, handle_rx_packet, rx_packet_handled : std_logic := '0';
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signal debug_rx_flag, debug_rx_flag1, debug_rx_flag2 : std_logic := '0';
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signal rx_packet_ram_we_addr, rx_packet_ram_we_addr_buf : unsigned(10 downto 0) := (others => '0');
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signal rx_packet_ram_rd_addr : unsigned(10 downto 0) := (others => '0');
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signal rx_packet_rd2_addr : unsigned(10 downto 0) := (others => '0');
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signal rx_packet_rd_data, rx_packet_rd_data2 : std_logic_vector(7 downto 0);
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signal rx_packet_status_vector, arp_target_ip_addr, arp_source_ip_addr : std_logic_vector(31 downto 0);
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signal rx_packet_type : std_logic_vector(15 downto 0);
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signal rx_packet_source_mac : std_logic_vector(47 downto 0);
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signal send_arp_reply, send_arp_request : std_logic := '0';
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signal send_icmp_reply, send_dhcp_discover, send_dhcp_request : std_logic := '0';
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signal arp_opcode : std_logic_vector(7 downto 0);
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signal tx_packet_ram_we, tx_packet_config_cmplt : std_logic := '0';
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signal tx_packet_ram_we_addr, tx_packet_ram_rd_addr : unsigned(10 downto 0) := (others => '0');
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signal tx_packet_ram_we_addr_buf : unsigned(10 downto 0) := (others => '0');
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signal tx_packet_rd_data, tx_packet_ram_data : std_logic_vector(7 downto 0);
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signal tx_packet_rd_data2 : std_logic_vector(7 downto 0);
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signal handle_tx_packet : std_logic := '0';
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signal ip_addr : std_logic_vector(31 downto 0) := X"C0A80166"; -- 192.168.1.102
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signal mac_addr : std_logic_vector(47 downto 0) := X"8066F23D547A";
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signal ip_identification : std_logic_vector(15 downto 0);
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signal ping_enable : std_logic := '1';
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signal dhcp_enable : std_logic := '0';
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signal dhcp_addr_locked, static_addr_locked : std_logic := '0';
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signal client_ip_addr : std_logic_vector(31 downto 0) := X"C0A80100"; -- 192.168.1.0 should be set dynamically upon TCP connection ??
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signal client_mac_addr : std_logic_vector(47 downto 0) := X"000000000000";
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--signal cloud_ip_addr : std_logic_vector(31 downto 0) := X"76D2707C"; -- 118.210.112.124
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signal cloud_ip_addr : std_logic_vector(31 downto 0) := X"C0A80100"; -- 192.168.1.0
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signal tx_packet_frame_addr :unsigned(10 downto 0);
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signal tx_packet_length, tx_packet_length_counter, tx_packet_end_pointer :unsigned(15 downto 0);
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signal prev_tx_packet_end_pointer :unsigned(15 downto 0);
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signal doing_tx_packet_config, tx_packet_frame_data_rd : std_logic := '0';
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signal packet_instruction, packet_data : std_logic_vector(7 downto 0);
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signal tx_packet_ready_for_transmission : std_logic := '0';
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signal send_prev_packet_waiting, trigger_send_prev_packet : std_logic := '0';
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signal trigger_close_connection, wait_for_tcp_window_size_update : std_logic := '0';
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signal tx_base_addr, tx_base_addr_prev : unsigned(15 downto 0);
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signal tx_base_addr_select : std_logic := '0';
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signal ip_packet_version : std_logic_vector(3 downto 0);
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signal ip_packet_protocol : std_logic_vector(7 downto 0);
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signal ip_packet_header_length : std_logic_vector(7 downto 0);
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signal ip_packet_destination_ip : std_logic_vector(31 downto 0);
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signal ip_packet_length, ip_packet_length_debug : std_logic_vector(15 downto 0); -- TODO remove debug
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signal total_packet_length : unsigned(15 downto 0);
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signal lfsr_val : std_logic_vector(31 downto 0);
|
273 |
|
|
signal calc_checksum, checksum_calc_done : std_logic := '0';
|
274 |
|
|
signal checksum_start_addr, checksum_addr, checksum_wr_addr : std_logic_vector(10 downto 0);
|
275 |
|
|
signal checksum_count : unsigned(10 downto 0);
|
276 |
|
|
signal checksum : std_logic_vector(15 downto 0);
|
277 |
|
|
signal checksum_initial_value : std_logic_vector(15 downto 0);
|
278 |
|
|
signal checksum_set_initial_value, checksum_odd_length : std_logic;
|
279 |
|
|
|
280 |
|
|
signal command : std_logic_vector(3 downto 0);
|
281 |
|
|
signal poll_interrupt_reg, command_waiting : std_logic;
|
282 |
|
|
signal poll_counter : unsigned(3 downto 0) := (others => '1');
|
283 |
|
|
|
284 |
|
|
signal dhcp_transaction_id : std_logic_vector(31 downto 0) := X"CA805562";
|
285 |
|
|
signal transaction_id_rd : std_logic_vector(31 downto 0) := X"00000000";
|
286 |
|
|
|
287 |
|
|
signal udp_source_port, udp_dest_port : std_logic_vector(15 downto 0);
|
288 |
|
|
signal dhcp_your_ip_addr, dhcp_server_ip_addr, dhcp_magic_cookie : std_logic_vector(31 downto 0);
|
289 |
|
|
|
290 |
|
|
signal expecting_dhcp_offer, expecting_dhcp_ack, expecting_arp_reply : std_logic := '0';
|
291 |
|
|
signal expecting_syn_ack, ack_required, trigger_ack : std_logic := '0';
|
292 |
|
|
signal dhcp_option_addr : unsigned(10 downto 0);
|
293 |
|
|
signal dhcp_option, dhcp_option_length, dhcp_message_type : std_logic_vector(7 downto 0);
|
294 |
|
|
|
295 |
|
|
signal packet_definition_addr : std_logic_vector(10 downto 0);
|
296 |
|
|
signal packet_definition_data : std_logic_vector(15 downto 0);
|
297 |
|
|
|
298 |
|
|
signal client_port : std_logic_vector(15 downto 0) := (others => '0');
|
299 |
|
|
signal listen_port : std_logic_vector(15 downto 0) := X"0DA2";
|
300 |
|
|
signal tcp_sequence_number, tcp_acknowledge_number : unsigned(31 downto 0) := (others => '0');
|
301 |
|
|
signal tcp_sequence_number_previous_ack, tcp_ack_number_previous_ack : unsigned(31 downto 0) := (others => '0');
|
302 |
|
|
signal tcp_ack_number_previous_ack1, tcp_ack_number_previous_ack2, tcp_ack_number_previous_ack3 : unsigned(31 downto 0) := (others => '0');
|
303 |
|
|
signal tcp_ack_number_previous_ack4, tcp_ack_number_previous_ack5, tcp_ack_number_previous_ack6 : unsigned(31 downto 0) := (others => '0');
|
304 |
|
|
signal tcp_sequence_number_p1 : unsigned(31 downto 0) := (others => '0');
|
305 |
|
|
signal tcp_flags : std_logic_vector(7 downto 0) := (others => '0');
|
306 |
|
|
signal window_size : unsigned(11 downto 0) := X"E00";
|
307 |
|
|
signal requested_data_size : unsigned(11 downto 0);
|
308 |
|
|
signal send_tcp_ack_packet, cancel_dhcp_connect : std_logic := '0';
|
309 |
|
|
signal send_tcp_tx_packet : std_logic := '0';
|
310 |
|
|
signal tcp_connection_active, close_tcp_connection, cancel_tcp_connection : std_logic := '0';
|
311 |
|
|
signal tcp_ip_identification : unsigned(15 downto 0);
|
312 |
|
|
|
313 |
|
|
signal rx_tcp_source_port, rx_tcp_dest_port : std_logic_vector(15 downto 0) := (others => '0');
|
314 |
|
|
signal rx_tcp_seq_number, rx_tcp_ack_number : std_logic_vector(31 downto 0) := (others => '0');
|
315 |
|
|
signal rx_tcp_window_size_shifted : std_logic_vector(31 downto 0) := (others => '0');
|
316 |
|
|
signal rx_tcp_window_size, rx_tcp_checksum : std_logic_vector(15 downto 0) := (others => '0');
|
317 |
|
|
signal rx_tcp_flags, rx_tcp_option, rx_tcp_header_length : std_logic_vector(7 downto 0) := (others => '0');
|
318 |
|
|
signal rx_tcp_option_length : unsigned(7 downto 0);
|
319 |
|
|
signal rx_tcp_window_shift : std_logic_vector(3 downto 0);
|
320 |
|
|
signal tcp_option_addr, next_protocol_start_addr : unsigned(10 downto 0);
|
321 |
|
|
signal rx_data_length, prev_rx_data_length : unsigned(15 downto 0);
|
322 |
|
|
signal rx_data_start_addr : unsigned(10 downto 0);
|
323 |
|
|
signal resend_ack_packet, fin_received, syn_ack_packet : std_logic := '0';
|
324 |
|
|
signal sent_syn_ack : std_logic := '0';
|
325 |
|
|
signal fin_received_p, trigger_fin_ack : std_logic := '0';
|
326 |
|
|
|
327 |
|
|
signal tcp_rx_data_we, tcp_rd_data_available, tcp_data_rd_en : std_logic := '0';
|
328 |
|
|
signal tcp_rx_ram_almost_full : std_logic := '0';
|
329 |
|
|
signal tcp_rd_data_count, tcp_wr_data_count : std_logic_vector(11 downto 0) := (others => '0');
|
330 |
|
|
signal tcp_rx_data : unsigned(7 downto 0) := (others => '0');
|
331 |
|
|
signal tcp_rx_data_rd_data : std_logic_vector(7 downto 0) := (others => '0');
|
332 |
|
|
|
333 |
|
|
signal tcp_wr_data_possible, tcp_wr_data_en, tcp_tx_data_rd : std_logic := '0';
|
334 |
|
|
signal tcp_wr_data_flush, tcp_data_flush_waiting : std_logic := '0';
|
335 |
|
|
signal large_tx_packet_waiting : std_logic := '0';
|
336 |
|
|
signal tcp_wr_data, tcp_tx_data : std_logic_vector(7 downto 0) := (others => '0');
|
337 |
|
|
signal tx_bytes_to_send, tx_total_packet_length, tx_packet_data_counter : unsigned(11 downto 0) := (others => '0');
|
338 |
|
|
signal tx_total_packet_length_inc_mac, tx_total_packet_length_checksum : unsigned(11 downto 0) := (others => '0');
|
339 |
|
|
signal tx_packet_no_ack_timeout : unsigned(23 downto 0) := C_100ms;
|
340 |
|
|
signal tx_packet_timeout_counter, tx_packet_timeout_counter_prev : unsigned(7 downto 0) := X"00";
|
341 |
|
|
signal tx_timeout_counter : unsigned(20 downto 0);
|
342 |
|
|
signal tx_packets_no_ack : unsigned(3 downto 0) := X"0";
|
343 |
|
|
|
344 |
|
|
signal clk_1hz, clk_1hz_prev : std_logic := '0';
|
345 |
|
|
signal init_enc28j60_waiting, dhcp_connect_waiting, tcp_connect_waiting : std_logic := '0';
|
346 |
|
|
signal rx_kbytes_sec, tx_kbytes_sec : unsigned(11 downto 0);
|
347 |
|
|
signal rx_bytes_counter, tx_bytes_counter : unsigned(21 downto 0);
|
348 |
|
|
|
349 |
|
|
signal ack_countdown : unsigned(15 downto 0);
|
350 |
|
|
signal num_packets : std_logic_vector(7 downto 0) := (others => '0');
|
351 |
|
|
|
352 |
|
|
type ETH_ST is ( IDLE,
|
353 |
|
|
TRIGGER_DHCP_DISCOVER,
|
354 |
|
|
TRIGGER_ARP_REQUEST,
|
355 |
|
|
TRIGGER_CANCEL_DHCP_CONNECT,
|
356 |
|
|
TRIGGER_CLOSE_TCP_CONNECTION,
|
357 |
|
|
TRIGGER_CANCEL_TCP_CONNECTION,
|
358 |
|
|
HANDLE_INIT_CMND0,
|
359 |
|
|
HANDLE_INIT_CMND1,
|
360 |
|
|
HANDLE_INIT_CMND2,
|
361 |
|
|
HANDLE_INIT_CMND3,
|
362 |
|
|
HANDLE_INIT_CMND4,
|
363 |
|
|
HANDLE_INIT_CMND5,
|
364 |
|
|
HANDLE_INIT_CMND6,
|
365 |
|
|
SERVICE_INTERRUPT0,
|
366 |
|
|
SERVICE_INTERRUPT1,
|
367 |
|
|
SERVICE_INTERRUPT2,
|
368 |
|
|
SERVICE_INTERRUPT3,
|
369 |
|
|
SERVICE_INTERRUPT4,
|
370 |
|
|
SERVICE_INTERRUPT5,
|
371 |
|
|
SERVICE_INTERRUPT6,
|
372 |
|
|
SERVICE_INTERRUPT7,
|
373 |
|
|
SERVICE_INTERRUPT8,
|
374 |
|
|
HANDLE_TX_INTERRUPT0,
|
375 |
|
|
HANDLE_TX_INTERRUPT1,
|
376 |
|
|
HANDLE_TX_INTERRUPT2,
|
377 |
|
|
HANDLE_RX_INTERRUPT0,
|
378 |
|
|
HANDLE_RX_INTERRUPT1,
|
379 |
|
|
HANDLE_RX_INTERRUPT2,
|
380 |
|
|
HANDLE_RX_INTERRUPT3,
|
381 |
|
|
HANDLE_RX_INTERRUPT4,
|
382 |
|
|
HANDLE_RX_INTERRUPT5,
|
383 |
|
|
HANDLE_RX_INTERRUPT6,
|
384 |
|
|
HANDLE_RX_INTERRUPT7,
|
385 |
|
|
HANDLE_RX_INTERRUPT8,
|
386 |
|
|
HANDLE_RX_INTERRUPT9,
|
387 |
|
|
HANDLE_RX_INTERRUPT10,
|
388 |
|
|
HANDLE_RX_INTERRUPT11,
|
389 |
|
|
HANDLE_RX_INTERRUPT12,
|
390 |
|
|
HANDLE_RX_INTERRUPT13,
|
391 |
|
|
HANDLE_RX_INTERRUPT14,
|
392 |
|
|
HANDLE_RX_INTERRUPT15,
|
393 |
|
|
HANDLE_RX_INTERRUPT16,
|
394 |
|
|
HANDLE_RX_INTERRUPT17,
|
395 |
|
|
CHECK_IF_ACK_WAITING,
|
396 |
|
|
TRIGGER_ACK_PACKET,
|
397 |
|
|
TRIGGER_TCP_TX0,
|
398 |
|
|
TRIGGER_TCP_TX1,
|
399 |
|
|
TRIGGER_TCP_TX2,
|
400 |
|
|
COPY_RX_PACKET_TO_BUF0,
|
401 |
|
|
COPY_RX_PACKET_TO_BUF1,
|
402 |
|
|
COPY_RX_PACKET_TO_BUF2,
|
403 |
|
|
COPY_RX_PACKET_TO_BUF3,
|
404 |
|
|
COPY_RX_PACKET_TO_BUF4,
|
405 |
|
|
COPY_RX_PACKET_TO_BUF5,
|
406 |
|
|
COPY_RX_PACKET_TO_BUF6,
|
407 |
|
|
PRE_TX_TRANSMIT0,
|
408 |
|
|
PRE_TX_TRANSMIT1,
|
409 |
|
|
PRE_TX_TRANSMIT2,
|
410 |
|
|
PRE_TX_TRANSMIT3,
|
411 |
|
|
PRE_TX_TRANSMIT4,
|
412 |
|
|
PRE_TX_TRANSMIT5,
|
413 |
|
|
HANDLE_TX_TRANSMIT0,
|
414 |
|
|
HANDLE_TX_TRANSMIT1,
|
415 |
|
|
HANDLE_TX_TRANSMIT2,
|
416 |
|
|
HANDLE_TX_TRANSMIT3,
|
417 |
|
|
HANDLE_TX_TRANSMIT4,
|
418 |
|
|
HANDLE_TX_TRANSMIT5,
|
419 |
|
|
HANDLE_TX_TRANSMIT6,
|
420 |
|
|
HANDLE_TX_TRANSMIT7,
|
421 |
|
|
HANDLE_TX_TRANSMIT8,
|
422 |
|
|
HANDLE_TX_TRANSMIT9,
|
423 |
|
|
HANDLE_TX_TRANSMIT10,
|
424 |
|
|
HANDLE_TX_TRANSMIT_PRE11,
|
425 |
|
|
HANDLE_TX_TRANSMIT11,
|
426 |
|
|
HANDLE_TX_TRANSMIT12,
|
427 |
|
|
HANDLE_TX_TRANSMIT13,
|
428 |
|
|
HANDLE_TX_TRANSMIT14,
|
429 |
|
|
HANDLE_TX_TRANSMIT15,
|
430 |
|
|
HANDLE_TX_TRANSMIT16,
|
431 |
|
|
HANDLE_TX_TRANSMIT17,
|
432 |
|
|
HANDLE_TX_TRANSMIT18,
|
433 |
|
|
HANDLE_TX_TRANSMIT19,
|
434 |
|
|
HANDLE_TX_TRANSMIT20,
|
435 |
|
|
HANDLE_TX_TRANSMIT21,
|
436 |
|
|
HANDLE_TX_TRANSMIT22,
|
437 |
|
|
HANDLE_TX_TRANSMIT_PREV0,
|
438 |
|
|
HANDLE_TX_TRANSMIT_PREV1,
|
439 |
|
|
HANDLE_TX_TRANSMIT_PREV2,
|
440 |
|
|
HANDLE_TX_TRANSMIT_PREV3,
|
441 |
|
|
HANDLE_TX_TRANSMIT_PREV4,
|
442 |
|
|
HANDLE_TX_TRANSMIT_PREV5,
|
443 |
|
|
HANDLE_TX_TRANSMIT_PREV6,
|
444 |
|
|
HANDLE_TX_TRANSMIT_PREV7,
|
445 |
|
|
HANDLE_TX_TRANSMIT_PREV8,
|
446 |
|
|
HANDLE_TX_TRANSMIT_PREV9,
|
447 |
|
|
HANDLE_TX_TRANSMIT_PREV10,
|
448 |
|
|
HANDLE_TX_TRANSMIT_PREV11,
|
449 |
|
|
HANDLE_TX_TRANSMIT_PREV12,
|
450 |
|
|
HANDLE_TX_TRANSMIT_PREV13,
|
451 |
|
|
HANDLE_TX_TRANSMIT_PREV14,
|
452 |
|
|
HANDLE_TX_TRANSMIT_PREV15,
|
453 |
|
|
HANDLE_TX_TRANSMIT_PREV16,
|
454 |
|
|
WAIT_FOR_TRANSMIT_CMPLT,
|
455 |
|
|
RESEND_ACK_IN_BUFFER);
|
456 |
|
|
|
457 |
|
|
signal eth_state, eth_next_state : ETH_ST := IDLE;
|
458 |
|
|
signal state_debug_sig : unsigned(7 downto 0);
|
459 |
|
|
|
460 |
|
|
type PACKET_HANDLER_ST is ( IDLE,
|
461 |
|
|
PARSE_SOURCE_MAC0,
|
462 |
|
|
PARSE_SOURCE_MAC1,
|
463 |
|
|
PARSE_SOURCE_MAC2,
|
464 |
|
|
PARSE_SOURCE_MAC3,
|
465 |
|
|
PARSE_SOURCE_MAC4,
|
466 |
|
|
PARSE_SOURCE_MAC5,
|
467 |
|
|
PARSE_SOURCE_MAC6,
|
468 |
|
|
PARSE_SOURCE_MAC7,
|
469 |
|
|
PARSE_PACKET_TYPE0,
|
470 |
|
|
PARSE_PACKET_TYPE1,
|
471 |
|
|
PARSE_PACKET_TYPE2,
|
472 |
|
|
PARSE_PACKET_TYPE3,
|
473 |
|
|
PARSE_PACKET_TYPE4,
|
474 |
|
|
HANDLE_ARP_PACKET0,
|
475 |
|
|
HANDLE_ARP_PACKET1,
|
476 |
|
|
HANDLE_ARP_PACKET2,
|
477 |
|
|
HANDLE_ARP_PACKET3,
|
478 |
|
|
HANDLE_ARP_REQUEST0,
|
479 |
|
|
HANDLE_ARP_REQUEST1,
|
480 |
|
|
HANDLE_ARP_REQUEST2,
|
481 |
|
|
HANDLE_ARP_REQUEST3,
|
482 |
|
|
HANDLE_ARP_REQUEST4,
|
483 |
|
|
HANDLE_ARP_REQUEST5,
|
484 |
|
|
HANDLE_ARP_REQUEST6,
|
485 |
|
|
HANDLE_ARP_REQUEST7,
|
486 |
|
|
HANDLE_ARP_REQUEST8,
|
487 |
|
|
HANDLE_ARP_REQUEST9,
|
488 |
|
|
HANDLE_ARP_REQUEST10,
|
489 |
|
|
HANDLE_ARP_REQUEST11,
|
490 |
|
|
HANDLE_ARP_REQUEST12,
|
491 |
|
|
HANDLE_ARP_REQUEST13,
|
492 |
|
|
HANDLE_ARP_REPLY0,
|
493 |
|
|
HANDLE_ARP_REPLY1,
|
494 |
|
|
HANDLE_ARP_REPLY2,
|
495 |
|
|
HANDLE_ARP_REPLY3,
|
496 |
|
|
HANDLE_ARP_REPLY4,
|
497 |
|
|
HANDLE_ARP_REPLY5,
|
498 |
|
|
HANDLE_ARP_REPLY6,
|
499 |
|
|
HANDLE_ARP_REPLY7,
|
500 |
|
|
TRIGGER_ARP_REPLY,
|
501 |
|
|
HANDLE_IP_PACKET0,
|
502 |
|
|
HANDLE_IP_PACKET1,
|
503 |
|
|
HANDLE_IP_PACKET2,
|
504 |
|
|
HANDLE_IP_PACKET3,
|
505 |
|
|
HANDLE_IP_PACKET4,
|
506 |
|
|
HANDLE_IP_PACKET5,
|
507 |
|
|
HANDLE_IP_PACKET6,
|
508 |
|
|
HANDLE_IP_PACKET7,
|
509 |
|
|
HANDLE_IP_PACKET8,
|
510 |
|
|
HANDLE_IP_PACKET9,
|
511 |
|
|
HANDLE_IP_PACKET10,
|
512 |
|
|
HANDLE_IP_PACKET11,
|
513 |
|
|
HANDLE_IP_PACKET12,
|
514 |
|
|
PRE_ICMP_PACKET_REPLY,
|
515 |
|
|
TRIGGER_ICMP_PACKET_REPLY,
|
516 |
|
|
PARSE_UDP_PACKET0,
|
517 |
|
|
PARSE_UDP_PACKET1,
|
518 |
|
|
PARSE_UDP_PACKET2,
|
519 |
|
|
PARSE_UDP_PACKET3,
|
520 |
|
|
PARSE_UDP_PACKET4,
|
521 |
|
|
PARSE_UDP_PACKET5,
|
522 |
|
|
PARSE_UDP_PACKET_TYPE0,
|
523 |
|
|
PARSE_UDP_PACKET_TYPE1,
|
524 |
|
|
PARSE_DHCP_PACKET0,
|
525 |
|
|
PARSE_DHCP_PACKET1,
|
526 |
|
|
PARSE_DHCP_PACKET2,
|
527 |
|
|
PARSE_DHCP_PACKET3,
|
528 |
|
|
PARSE_DHCP_PACKET4,
|
529 |
|
|
PARSE_DHCP_PACKET5,
|
530 |
|
|
PARSE_DHCP_PACKET6,
|
531 |
|
|
PARSE_DHCP_PACKET7,
|
532 |
|
|
PARSE_DHCP_PACKET8,
|
533 |
|
|
PARSE_DHCP_PACKET9,
|
534 |
|
|
PARSE_DHCP_PACKET10,
|
535 |
|
|
PARSE_DHCP_PACKET11,
|
536 |
|
|
PARSE_DHCP_PACKET12,
|
537 |
|
|
PARSE_DHCP_PACKET13,
|
538 |
|
|
PARSE_DHCP_PACKET14,
|
539 |
|
|
PARSE_DHCP_PACKET15,
|
540 |
|
|
PARSE_DHCP_PACKET16,
|
541 |
|
|
PARSE_DHCP_PACKET17,
|
542 |
|
|
PARSE_DHCP_PACKET18,
|
543 |
|
|
PARSE_DHCP_PACKET19,
|
544 |
|
|
PARSE_DHCP_PACKET20,
|
545 |
|
|
PARSE_DHCP_PACKET21,
|
546 |
|
|
PARSE_DHCP_PACKET22,
|
547 |
|
|
PARSE_DHCP_PACKET23,
|
548 |
|
|
PARSE_DHCP_PACKET24,
|
549 |
|
|
CHECK_OFFER_EXPECTED,
|
550 |
|
|
TRIGGER_DHCP_REQUEST,
|
551 |
|
|
HANDLE_DHCP_ACK0,
|
552 |
|
|
HANDLE_DHCP_ACK1,
|
553 |
|
|
HANDLE_DHCP_ACK2,
|
554 |
|
|
HANDLE_DHCP_ACK3,
|
555 |
|
|
HANDLE_DHCP_ACK4,
|
556 |
|
|
HANDLE_DHCP_ACK5,
|
557 |
|
|
HANDLE_DHCP_ACK6,
|
558 |
|
|
HANDLE_DHCP_ACK7,
|
559 |
|
|
HANDLE_DHCP_ACK8,
|
560 |
|
|
PARSE_TCP_PACKET0,
|
561 |
|
|
PARSE_TCP_PACKET1,
|
562 |
|
|
PARSE_TCP_PACKET2,
|
563 |
|
|
PARSE_TCP_PACKET3,
|
564 |
|
|
PARSE_TCP_PACKET4,
|
565 |
|
|
PARSE_TCP_PACKET5,
|
566 |
|
|
PARSE_TCP_PACKET6,
|
567 |
|
|
PARSE_TCP_PACKET7,
|
568 |
|
|
PARSE_TCP_PACKET8,
|
569 |
|
|
PARSE_TCP_PACKET9,
|
570 |
|
|
PARSE_TCP_PACKET10,
|
571 |
|
|
PARSE_TCP_PACKET11,
|
572 |
|
|
PARSE_TCP_PACKET12,
|
573 |
|
|
PARSE_TCP_PACKET13,
|
574 |
|
|
PARSE_TCP_PACKET14,
|
575 |
|
|
PARSE_TCP_PACKET15,
|
576 |
|
|
PARSE_TCP_PACKET16,
|
577 |
|
|
PARSE_TCP_PACKET17,
|
578 |
|
|
PARSE_TCP_PACKET18,
|
579 |
|
|
PARSE_TCP_PACKET19,
|
580 |
|
|
PARSE_TCP_PACKET20,
|
581 |
|
|
PARSE_TCP_PACKET21,
|
582 |
|
|
PARSE_TCP_PACKET22,
|
583 |
|
|
PARSE_TCP_PACKET23,
|
584 |
|
|
PARSE_TCP_PACKET24,
|
585 |
|
|
PARSE_TCP_PACKET25,
|
586 |
|
|
PARSE_TCP_PACKET26,
|
587 |
|
|
PARSE_TCP_PACKET27,
|
588 |
|
|
CHECK_TCP_SYN_PACKET0,
|
589 |
|
|
CHECK_TCP_SYN_PACKET1,
|
590 |
|
|
CHECK_TCP_SYN_PACKET2,
|
591 |
|
|
CHECK_TCP_SYN_PACKET3,
|
592 |
|
|
CHECK_TCP_SYN_PACKET4,
|
593 |
|
|
CHECK_TCP_SYN_PACKET5,
|
594 |
|
|
CHECK_TCP_PSH_ACK_PACKET0,
|
595 |
|
|
CHECK_TCP_PSH_ACK_PACKET1,
|
596 |
|
|
CHECK_TCP_PSH_ACK_PACKET2,
|
597 |
|
|
CHECK_TCP_PSH_ACK_PACKET3,
|
598 |
|
|
READ_TCP_RX_DATA,
|
599 |
|
|
TRIGGER_TCP_ACK0,
|
600 |
|
|
TRIGGER_TCP_ACK1,
|
601 |
|
|
TRIGGER_TCP_ACK2,
|
602 |
|
|
TRIGGER_TCP_ACK3,
|
603 |
|
|
RESEND_ACK,
|
604 |
|
|
CHECK_IF_DATA_TO_SEND,
|
605 |
|
|
TRIGGER_TCP_PSH_ACK0,
|
606 |
|
|
TRIGGER_TCP_PSH_ACK1,
|
607 |
|
|
CHECK_TCP_WINDOW_SIZE,
|
608 |
|
|
RX_TCP_WINDOW_TOO_SMALL,
|
609 |
|
|
TRIGGER_TCP_PSH_ACK2,
|
610 |
|
|
TRIGGER_TCP_PSH_ACK3,
|
611 |
|
|
COMPLETE
|
612 |
|
|
);
|
613 |
|
|
|
614 |
|
|
signal packet_handler_state, packet_handler_next_state : PACKET_HANDLER_ST := IDLE;
|
615 |
|
|
|
616 |
|
|
type TX_PACKET_CONFIG_ST is ( IDLE,
|
617 |
|
|
INIT_ARP_REPLY_METADATA,
|
618 |
|
|
INIT_ARP_REQUEST_METADATA,
|
619 |
|
|
INIT_ICMP_REPLY_METADATA,
|
620 |
|
|
INIT_DHCP_DISCOVER_METADATA,
|
621 |
|
|
INIT_DHCP_REQUEST_METADATA,
|
622 |
|
|
INIT_TCP_PACKET_METADATA,
|
623 |
|
|
INIT_TCP_TX_PACKET_METADATA,
|
624 |
|
|
CANCEL_DHCP_CONNECT_ST,
|
625 |
|
|
TCP_CONNECTION_CLOSED,
|
626 |
|
|
CANCEL_TCP_CONNECTION_ST,
|
627 |
|
|
READ_PACKET_BYTE0,
|
628 |
|
|
READ_PACKET_BYTE1,
|
629 |
|
|
HANDLE_PACKET_INSTRUCTION0,
|
630 |
|
|
HANDLE_PACKET_INSTRUCTION1,
|
631 |
|
|
SET_RX_PACKET_ADDR_LOWER_BYTE,
|
632 |
|
|
SET_RX_PACKET_ADDR_UPPER_BYTE,
|
633 |
|
|
SET_CHECKSUM_LENGTH_LSB,
|
634 |
|
|
SET_CHECKSUM_LENGTH_MSB,
|
635 |
|
|
SET_CHECKSUM_LENGTH_TX_PACKET_LENGTH0,
|
636 |
|
|
SET_CHECKSUM_LENGTH_TX_PACKET_LENGTH1,
|
637 |
|
|
SET_CHECKSUM_START_ADDR_LSB,
|
638 |
|
|
SET_CHECKSUM_START_ADDR_MSB,
|
639 |
|
|
SET_CHECKSUM_WR_ADDR_LSB,
|
640 |
|
|
SET_CHECKSUM_WR_ADDR_MSB,
|
641 |
|
|
MOVE_TX_PACKET_WR_ADDR,
|
642 |
|
|
SET_NEW_TRANSACTION_ID,
|
643 |
|
|
SET_CHECKSUM_START_VAL_LSB,
|
644 |
|
|
SET_CHECKSUM_START_VAL_MSB,
|
645 |
|
|
SET_CHECKSUM_INITIAL_VALUE_TX_PACKET,
|
646 |
|
|
TRIGGER_CHECKSUM_LOAD_INITIAL_VALUE,
|
647 |
|
|
TRIG_CHECKSUM_CALC,
|
648 |
|
|
WAIT_FOR_CHECKSUM_CMPLT,
|
649 |
|
|
INIT_LOAD_TX_PACKET_DATA,
|
650 |
|
|
LOAD_TX_PACKET_DATA,
|
651 |
|
|
COMPLETE
|
652 |
|
|
);
|
653 |
|
|
|
654 |
|
|
signal tx_packet_state, tx_packet_next_state : TX_PACKET_CONFIG_ST := IDLE;
|
655 |
|
|
|
656 |
|
|
begin
|
657 |
|
|
|
658 |
|
|
--DEBUG_OUT(15 downto 8) <= X"00";
|
659 |
|
|
--DEBUG_OUT(15 downto 4) <= X"000";
|
660 |
|
|
--DEBUG_OUT(15 downto 12) <= (others => '0');
|
661 |
|
|
--DEBUG_OUT(15 downto 12) <= slv(interrupt_counter(3 downto 0));
|
662 |
|
|
--DEBUG_OUT <= slv(rx_data_length);
|
663 |
|
|
--DEBUG_OUT <= udp_source_port when DEBUG_IN = '0' else udp_dest_port;
|
664 |
|
|
--DEBUG_OUT <= rx_tcp_source_port when DEBUG_IN = '0' else rx_tcp_dest_port;
|
665 |
|
|
--DEBUG_OUT <= rx_tcp_window_size when DEBUG_IN(0) = '0' else X"000"&rx_tcp_window_shift;
|
666 |
|
|
--DEBUG_OUT <= rx_tcp_window_size_shifted(31 downto 16) when DEBUG_IN(0) = '0' else rx_tcp_window_size_shifted(15 downto 0);
|
667 |
|
|
--DEBUG_OUT(11 downto 0) <= slv(window_size);
|
668 |
|
|
--DEBUG_OUT(7 downto 0) <= slv(rx_tcp_option_length);
|
669 |
|
|
--DEBUG_OUT <= "00000"&slv(tcp_option_addr);
|
670 |
|
|
--DEBUG_OUT(7 downto 4) <= X"0";
|
671 |
|
|
--DEBUG_OUT(15 downto 8) <= ip_packet_protocol;
|
672 |
|
|
--DEBUG_OUT(15 downto 8) <= rx_tcp_option;
|
673 |
|
|
--DEBUG_OUT <= X"00" & slv(rx_tcp_option) when DEBUG_IN = '0' else rx_tcp_window_shift & slv(rx_tcp_option_length);
|
674 |
|
|
--DEBUG_OUT <= dhcp_option & dhcp_option_length;
|
675 |
|
|
--DEBUG_OUT(7 downto 0) <= slv(init_cmnd_addr);
|
676 |
|
|
--DEBUG_OUT(7 downto 0) <= slv(state_debug_sig);
|
677 |
|
|
--DEBUG_OUT(7 downto 0) <= slv(eir_register);
|
678 |
|
|
--DEBUG_OUT <= spi_wr_addr & spi_wr_data;
|
679 |
|
|
--DEBUG_OUT <= next_packet_pointer;
|
680 |
|
|
--DEBUG_OUT <= rx_packet_status_vector(15 downto 0) when DEBUG_IN = '0' else rx_packet_status_vector(31 downto 16);
|
681 |
|
|
--DEBUG_OUT <= rx_packet_source_mac(15 downto 0) when DEBUG_IN = '0' else rx_packet_source_mac(31 downto 16);
|
682 |
|
|
--DEBUG_OUT <= arp_target_ip_addr(15 downto 0) when DEBUG_IN = '0' else arp_target_ip_addr(31 downto 16);
|
683 |
|
|
--DEBUG_OUT <= arp_source_ip_addr(15 downto 0) when DEBUG_IN = '0' else arp_source_ip_addr(31 downto 16);
|
684 |
|
|
--DEBUG_OUT <= dhcp_your_ip_addr(15 downto 0) when DEBUG_IN = '0' else dhcp_your_ip_addr(31 downto 16);
|
685 |
|
|
--DEBUG_OUT <= slv(tcp_acknowledge_number(15 downto 0)) when DEBUG_IN(1) = '0' else slv(tcp_acknowledge_number(31 downto 16));
|
686 |
|
|
--DEBUG_OUT <= slv(tcp_ack_number_previous_ack(15 downto 0)) when DEBUG_IN = '0' else slv(tcp_ack_number_previous_ack(31 downto 16));
|
687 |
|
|
--DEBUG_OUT(11 downto 0) <= slv(requested_data_size);
|
688 |
|
|
--DEBUG_OUT(7 downto 0) <= tx_packet_rd_data;
|
689 |
|
|
--DEBUG_OUT <= rx_packet_type;
|
690 |
|
|
--DEBUG_OUT <= slv(tx_packet_end_pointer);
|
691 |
|
|
--DEBUG_OUT(3 downto 0) <= ip_packet_version;
|
692 |
|
|
--DEBUG_OUT(7 downto 0) <= X"0"&"0"&debug_rx_flag2&debug_rx_flag1&debug_rx_flag;
|
693 |
|
|
--DEBUG_OUT(7 downto 0) <= slv(num_packets);
|
694 |
|
|
--DEBUG_OUT(7 downto 0) <= slv(tcp_tx_data);
|
695 |
|
|
--DEBUG_OUT(3 downto 0) <= slv(tx_packet_ack_timeout_occur);
|
696 |
|
|
--DEBUG_OUT(11 downto 0) <= slv(rx_kbytes_sec);
|
697 |
|
|
DEBUG_OUT(15 downto 0) <= slv(interrupt_counter);
|
698 |
|
|
--DEBUG_OUT(15 downto 0) <= slv(tx_base_addr);
|
699 |
|
|
--DEBUG_OUT(15 downto 0) <= slv(checksum);
|
700 |
|
|
--DEBUG_OUT(15 downto 0) <= slv(checksum_initial_value);
|
701 |
|
|
--DEBUG_OUT(10 downto 0) <= slv(rx_data_start_addr);
|
702 |
|
|
--DEBUG_OUT(11 downto 0) <= slv(tcp_wr_data_count);
|
703 |
|
|
|
704 |
|
|
packet_definition_addr <= frame_addr when doing_tx_packet_config = '0' else slv(tx_packet_frame_addr);
|
705 |
|
|
frame_data <= packet_definition_data;
|
706 |
|
|
frame_rd_cmplt <= '1';
|
707 |
|
|
|
708 |
|
|
clk_1hz <= CLK_1HZ_IN;
|
709 |
|
|
|
710 |
|
|
---- HANDLE COMMANDS ----
|
711 |
|
|
|
712 |
|
|
INT_PROC: process(CLK_IN)
|
713 |
|
|
begin
|
714 |
|
|
if rising_edge(CLK_IN) then
|
715 |
|
|
if packet_handler_state = CHECK_TCP_SYN_PACKET0 then
|
716 |
|
|
interrupt_counter <= interrupt_counter + 1;
|
717 |
|
|
end if;
|
718 |
|
|
end if;
|
719 |
|
|
end process;
|
720 |
|
|
|
721 |
|
|
SYNC_PROC: process(CLK_IN)
|
722 |
|
|
begin
|
723 |
|
|
if rising_edge(CLK_IN) then
|
724 |
|
|
eth_state <= eth_next_state;
|
725 |
|
|
end if;
|
726 |
|
|
end process;
|
727 |
|
|
|
728 |
|
|
NEXT_STATE_DECODE: process (eth_state, command, command_waiting, init_cmnd_addr, poll_interrupt_reg,
|
729 |
|
|
frame_data, tx_packet_ready_for_transmission, spi_oper_cmplt,
|
730 |
|
|
eir_register, previous_packet_pointer, next_packet_pointer, rx_packet_handled,
|
731 |
|
|
tx_packet_length_counter, spi_rd_cmplt, spi_wr_cmplt)
|
732 |
|
|
begin
|
733 |
|
|
eth_next_state <= eth_state; --default is to stay in current state
|
734 |
|
|
case (eth_state) is
|
735 |
|
|
when IDLE =>
|
736 |
|
|
if init_enc28j60_waiting = '1' then
|
737 |
|
|
eth_next_state <= HANDLE_INIT_CMND0;
|
738 |
|
|
elsif dhcp_connect_waiting = '1' then
|
739 |
|
|
eth_next_state <= TRIGGER_DHCP_DISCOVER;
|
740 |
|
|
elsif send_prev_packet_waiting = '1' then
|
741 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV0;
|
742 |
|
|
elsif resend_ack_packet = '1' then
|
743 |
|
|
eth_next_state <= RESEND_ACK_IN_BUFFER;
|
744 |
|
|
elsif tx_packet_ready_for_transmission = '1' then
|
745 |
|
|
eth_next_state <= PRE_TX_TRANSMIT0;
|
746 |
|
|
elsif tcp_data_flush_waiting = '1' then
|
747 |
|
|
eth_next_state <= TRIGGER_TCP_TX0;
|
748 |
|
|
elsif large_tx_packet_waiting = '1' then
|
749 |
|
|
eth_next_state <= TRIGGER_TCP_TX0;
|
750 |
|
|
else
|
751 |
|
|
eth_next_state <= SERVICE_INTERRUPT0;
|
752 |
|
|
end if;
|
753 |
|
|
|
754 |
|
|
when HANDLE_INIT_CMND0 =>
|
755 |
|
|
eth_next_state <= HANDLE_INIT_CMND1;
|
756 |
|
|
when HANDLE_INIT_CMND1 =>
|
757 |
|
|
eth_next_state <= HANDLE_INIT_CMND2;
|
758 |
|
|
when HANDLE_INIT_CMND2 =>
|
759 |
|
|
if frame_rd_cmplt = '1' then
|
760 |
|
|
if frame_data = X"0000" then
|
761 |
|
|
eth_next_state <= HANDLE_INIT_CMND6;
|
762 |
|
|
else
|
763 |
|
|
eth_next_state <= HANDLE_INIT_CMND3;
|
764 |
|
|
end if;
|
765 |
|
|
end if;
|
766 |
|
|
when HANDLE_INIT_CMND3 =>
|
767 |
|
|
eth_next_state <= HANDLE_INIT_CMND4;
|
768 |
|
|
when HANDLE_INIT_CMND4 =>
|
769 |
|
|
if spi_oper_cmplt = '1' then
|
770 |
|
|
eth_next_state <= HANDLE_INIT_CMND5;
|
771 |
|
|
end if;
|
772 |
|
|
when HANDLE_INIT_CMND5 =>
|
773 |
|
|
if slv(init_cmnd_addr) = C_init_cmnds_max_addr then
|
774 |
|
|
eth_next_state <= HANDLE_INIT_CMND6;
|
775 |
|
|
else
|
776 |
|
|
eth_next_state <= HANDLE_INIT_CMND1;
|
777 |
|
|
end if;
|
778 |
|
|
when HANDLE_INIT_CMND6 =>
|
779 |
|
|
eth_next_state <= IDLE;
|
780 |
|
|
|
781 |
|
|
when TRIGGER_DHCP_DISCOVER =>
|
782 |
|
|
eth_next_state <= IDLE;
|
783 |
|
|
when TRIGGER_ARP_REQUEST =>
|
784 |
|
|
eth_next_state <= IDLE;
|
785 |
|
|
when TRIGGER_CANCEL_DHCP_CONNECT =>
|
786 |
|
|
eth_next_state <= IDLE;
|
787 |
|
|
when TRIGGER_CLOSE_TCP_CONNECTION =>
|
788 |
|
|
eth_next_state <= IDLE;
|
789 |
|
|
when TRIGGER_CANCEL_TCP_CONNECTION =>
|
790 |
|
|
eth_next_state <= IDLE;
|
791 |
|
|
|
792 |
|
|
when SERVICE_INTERRUPT0 =>
|
793 |
|
|
eth_next_state <= SERVICE_INTERRUPT1;
|
794 |
|
|
when SERVICE_INTERRUPT1 =>
|
795 |
|
|
if spi_oper_cmplt = '1' then
|
796 |
|
|
eth_next_state <= SERVICE_INTERRUPT2;
|
797 |
|
|
end if;
|
798 |
|
|
when SERVICE_INTERRUPT2 =>
|
799 |
|
|
eth_next_state <= SERVICE_INTERRUPT3;
|
800 |
|
|
when SERVICE_INTERRUPT3 =>
|
801 |
|
|
if spi_oper_cmplt = '1' then
|
802 |
|
|
eth_next_state <= SERVICE_INTERRUPT4;
|
803 |
|
|
end if;
|
804 |
|
|
when SERVICE_INTERRUPT4 =>
|
805 |
|
|
eth_next_state <= SERVICE_INTERRUPT5;
|
806 |
|
|
when SERVICE_INTERRUPT5 =>
|
807 |
|
|
if eir_register(6) = '1' then
|
808 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT0;
|
809 |
|
|
elsif eir_register(3) = '1' then
|
810 |
|
|
eth_next_state <= HANDLE_TX_INTERRUPT0;
|
811 |
|
|
else
|
812 |
|
|
eth_next_state <= SERVICE_INTERRUPT6;
|
813 |
|
|
end if;
|
814 |
|
|
when HANDLE_TX_INTERRUPT0 =>
|
815 |
|
|
eth_next_state <= HANDLE_TX_INTERRUPT1;
|
816 |
|
|
when HANDLE_TX_INTERRUPT1 =>
|
817 |
|
|
if spi_oper_cmplt = '1' then
|
818 |
|
|
eth_next_state <= HANDLE_TX_INTERRUPT2;
|
819 |
|
|
end if;
|
820 |
|
|
when HANDLE_TX_INTERRUPT2 =>
|
821 |
|
|
eth_next_state <= SERVICE_INTERRUPT6;
|
822 |
|
|
when HANDLE_RX_INTERRUPT0 =>
|
823 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT1;
|
824 |
|
|
when HANDLE_RX_INTERRUPT1 =>
|
825 |
|
|
if spi_oper_cmplt = '1' then
|
826 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT2;
|
827 |
|
|
end if;
|
828 |
|
|
when HANDLE_RX_INTERRUPT2 =>
|
829 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT3;
|
830 |
|
|
when HANDLE_RX_INTERRUPT3 =>
|
831 |
|
|
if spi_oper_cmplt = '1' then
|
832 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT4;
|
833 |
|
|
end if;
|
834 |
|
|
when HANDLE_RX_INTERRUPT4 =>
|
835 |
|
|
eth_next_state <= COPY_RX_PACKET_TO_BUF0;
|
836 |
|
|
|
837 |
|
|
when COPY_RX_PACKET_TO_BUF0 =>
|
838 |
|
|
eth_next_state <= COPY_RX_PACKET_TO_BUF1;
|
839 |
|
|
when COPY_RX_PACKET_TO_BUF1 =>
|
840 |
|
|
eth_next_state <= COPY_RX_PACKET_TO_BUF2;
|
841 |
|
|
when COPY_RX_PACKET_TO_BUF2 =>
|
842 |
|
|
if spi_rd_cmplt = '1' then
|
843 |
|
|
eth_next_state <= COPY_RX_PACKET_TO_BUF3;
|
844 |
|
|
end if;
|
845 |
|
|
when COPY_RX_PACKET_TO_BUF3 =>
|
846 |
|
|
eth_next_state <= COPY_RX_PACKET_TO_BUF4;
|
847 |
|
|
when COPY_RX_PACKET_TO_BUF4 =>
|
848 |
|
|
if slv(previous_packet_pointer) = next_packet_pointer then
|
849 |
|
|
eth_next_state <= COPY_RX_PACKET_TO_BUF5;
|
850 |
|
|
else
|
851 |
|
|
eth_next_state <= COPY_RX_PACKET_TO_BUF1;
|
852 |
|
|
end if;
|
853 |
|
|
when COPY_RX_PACKET_TO_BUF5 =>
|
854 |
|
|
if spi_oper_cmplt = '1' then
|
855 |
|
|
eth_next_state <= COPY_RX_PACKET_TO_BUF6;
|
856 |
|
|
end if;
|
857 |
|
|
when COPY_RX_PACKET_TO_BUF6 =>
|
858 |
|
|
if rx_packet_handled = '1' then
|
859 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT5;
|
860 |
|
|
end if;
|
861 |
|
|
|
862 |
|
|
when HANDLE_RX_INTERRUPT5 =>
|
863 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT6;
|
864 |
|
|
when HANDLE_RX_INTERRUPT6 =>
|
865 |
|
|
if spi_oper_cmplt = '1' then
|
866 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT7;
|
867 |
|
|
end if;
|
868 |
|
|
when HANDLE_RX_INTERRUPT7 =>
|
869 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT8;
|
870 |
|
|
when HANDLE_RX_INTERRUPT8 =>
|
871 |
|
|
if spi_oper_cmplt = '1' then
|
872 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT9;
|
873 |
|
|
end if;
|
874 |
|
|
when HANDLE_RX_INTERRUPT9 =>
|
875 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT10;
|
876 |
|
|
when HANDLE_RX_INTERRUPT10 =>
|
877 |
|
|
if spi_oper_cmplt = '1' then
|
878 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT11;
|
879 |
|
|
end if;
|
880 |
|
|
when HANDLE_RX_INTERRUPT11 =>
|
881 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT12;
|
882 |
|
|
when HANDLE_RX_INTERRUPT12 =>
|
883 |
|
|
if spi_oper_cmplt = '1' then
|
884 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT13;
|
885 |
|
|
end if;
|
886 |
|
|
when HANDLE_RX_INTERRUPT13 =>
|
887 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT14;
|
888 |
|
|
when HANDLE_RX_INTERRUPT14 =>
|
889 |
|
|
if spi_oper_cmplt = '1' then
|
890 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT15;
|
891 |
|
|
end if;
|
892 |
|
|
when HANDLE_RX_INTERRUPT15 =>
|
893 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT16;
|
894 |
|
|
when HANDLE_RX_INTERRUPT16 =>
|
895 |
|
|
if spi_oper_cmplt = '1' then
|
896 |
|
|
eth_next_state <= HANDLE_RX_INTERRUPT17;
|
897 |
|
|
end if;
|
898 |
|
|
when HANDLE_RX_INTERRUPT17 =>
|
899 |
|
|
eth_next_state <= SERVICE_INTERRUPT6;
|
900 |
|
|
|
901 |
|
|
when CHECK_IF_ACK_WAITING =>
|
902 |
|
|
if ack_required = '1' then
|
903 |
|
|
eth_next_state <= TRIGGER_ACK_PACKET;
|
904 |
|
|
else
|
905 |
|
|
eth_next_state <= IDLE;
|
906 |
|
|
end if;
|
907 |
|
|
when TRIGGER_ACK_PACKET =>
|
908 |
|
|
if packet_handler_state = TRIGGER_TCP_ACK0 then
|
909 |
|
|
eth_next_state <= IDLE;
|
910 |
|
|
end if;
|
911 |
|
|
|
912 |
|
|
when TRIGGER_TCP_TX0 =>
|
913 |
|
|
if tcp_wr_data_count = X"000" or tx_packets_no_ack > X"1" then
|
914 |
|
|
eth_next_state <= IDLE;
|
915 |
|
|
else
|
916 |
|
|
eth_next_state <= TRIGGER_TCP_TX1;
|
917 |
|
|
end if;
|
918 |
|
|
when TRIGGER_TCP_TX1 =>
|
919 |
|
|
if packet_handler_state = RX_TCP_WINDOW_TOO_SMALL then
|
920 |
|
|
eth_next_state <= IDLE;
|
921 |
|
|
elsif packet_handler_state = TRIGGER_TCP_PSH_ACK2 then
|
922 |
|
|
eth_next_state <= TRIGGER_TCP_TX2;
|
923 |
|
|
end if;
|
924 |
|
|
when TRIGGER_TCP_TX2 =>
|
925 |
|
|
if tx_packet_ready_for_transmission = '1' then
|
926 |
|
|
eth_next_state <= PRE_TX_TRANSMIT0;
|
927 |
|
|
end if;
|
928 |
|
|
|
929 |
|
|
when SERVICE_INTERRUPT6 =>
|
930 |
|
|
eth_next_state <= SERVICE_INTERRUPT7;
|
931 |
|
|
when SERVICE_INTERRUPT7 =>
|
932 |
|
|
if spi_oper_cmplt = '1' then
|
933 |
|
|
eth_next_state <= SERVICE_INTERRUPT8;
|
934 |
|
|
end if;
|
935 |
|
|
when SERVICE_INTERRUPT8 =>
|
936 |
|
|
eth_next_state <= CHECK_IF_ACK_WAITING;
|
937 |
|
|
|
938 |
|
|
when PRE_TX_TRANSMIT0 =>
|
939 |
|
|
eth_next_state <= PRE_TX_TRANSMIT1;
|
940 |
|
|
when PRE_TX_TRANSMIT1 =>
|
941 |
|
|
if spi_oper_cmplt = '1' then
|
942 |
|
|
eth_next_state <= PRE_TX_TRANSMIT2;
|
943 |
|
|
end if;
|
944 |
|
|
when PRE_TX_TRANSMIT2 =>
|
945 |
|
|
eth_next_state <= PRE_TX_TRANSMIT3;
|
946 |
|
|
when PRE_TX_TRANSMIT3 =>
|
947 |
|
|
if spi_oper_cmplt = '1' then
|
948 |
|
|
eth_next_state <= PRE_TX_TRANSMIT4;
|
949 |
|
|
end if;
|
950 |
|
|
when PRE_TX_TRANSMIT4 =>
|
951 |
|
|
eth_next_state <= PRE_TX_TRANSMIT5;
|
952 |
|
|
when PRE_TX_TRANSMIT5 =>
|
953 |
|
|
if spi_oper_cmplt = '1' then
|
954 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT0;
|
955 |
|
|
end if;
|
956 |
|
|
when HANDLE_TX_TRANSMIT0 =>
|
957 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT1;
|
958 |
|
|
when HANDLE_TX_TRANSMIT1 =>
|
959 |
|
|
if spi_oper_cmplt = '1' then
|
960 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT2;
|
961 |
|
|
end if;
|
962 |
|
|
when HANDLE_TX_TRANSMIT2 =>
|
963 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT3;
|
964 |
|
|
when HANDLE_TX_TRANSMIT3 =>
|
965 |
|
|
if spi_oper_cmplt = '1' then
|
966 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT4;
|
967 |
|
|
end if;
|
968 |
|
|
when HANDLE_TX_TRANSMIT4 =>
|
969 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT5;
|
970 |
|
|
when HANDLE_TX_TRANSMIT5 =>
|
971 |
|
|
if spi_oper_cmplt = '1' then
|
972 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT6;
|
973 |
|
|
end if;
|
974 |
|
|
when HANDLE_TX_TRANSMIT6 =>
|
975 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT7;
|
976 |
|
|
when HANDLE_TX_TRANSMIT7 =>
|
977 |
|
|
if tx_packet_length_counter = X"0000" then
|
978 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PRE11;
|
979 |
|
|
else
|
980 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT8;
|
981 |
|
|
end if;
|
982 |
|
|
when HANDLE_TX_TRANSMIT8 =>
|
983 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT9;
|
984 |
|
|
when HANDLE_TX_TRANSMIT9 =>
|
985 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT10;
|
986 |
|
|
when HANDLE_TX_TRANSMIT10 =>
|
987 |
|
|
if spi_wr_cmplt = '1' then
|
988 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT7;
|
989 |
|
|
end if;
|
990 |
|
|
when HANDLE_TX_TRANSMIT_PRE11 =>
|
991 |
|
|
if spi_oper_cmplt = '1' then
|
992 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT11;
|
993 |
|
|
end if;
|
994 |
|
|
when HANDLE_TX_TRANSMIT11 =>
|
995 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT12;
|
996 |
|
|
when HANDLE_TX_TRANSMIT12 =>
|
997 |
|
|
if spi_oper_cmplt = '1' then
|
998 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT13;
|
999 |
|
|
end if;
|
1000 |
|
|
when HANDLE_TX_TRANSMIT13 =>
|
1001 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT14;
|
1002 |
|
|
when HANDLE_TX_TRANSMIT14 =>
|
1003 |
|
|
if spi_oper_cmplt = '1' then
|
1004 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT15;
|
1005 |
|
|
end if;
|
1006 |
|
|
when HANDLE_TX_TRANSMIT15 =>
|
1007 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT16;
|
1008 |
|
|
when HANDLE_TX_TRANSMIT16 =>
|
1009 |
|
|
if spi_oper_cmplt = '1' then
|
1010 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT17;
|
1011 |
|
|
end if;
|
1012 |
|
|
when HANDLE_TX_TRANSMIT17 =>
|
1013 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT18;
|
1014 |
|
|
when HANDLE_TX_TRANSMIT18 =>
|
1015 |
|
|
if spi_oper_cmplt = '1' then
|
1016 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT19;
|
1017 |
|
|
end if;
|
1018 |
|
|
when HANDLE_TX_TRANSMIT19 =>
|
1019 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT20;
|
1020 |
|
|
when HANDLE_TX_TRANSMIT20 =>
|
1021 |
|
|
if spi_oper_cmplt = '1' then
|
1022 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT21;
|
1023 |
|
|
end if;
|
1024 |
|
|
when HANDLE_TX_TRANSMIT21 =>
|
1025 |
|
|
if spi_data_rd(3) = '1' then -- TX has completed
|
1026 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT22;
|
1027 |
|
|
else
|
1028 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT19;
|
1029 |
|
|
end if;
|
1030 |
|
|
when HANDLE_TX_TRANSMIT22 =>
|
1031 |
|
|
eth_next_state <= IDLE;
|
1032 |
|
|
|
1033 |
|
|
when HANDLE_TX_TRANSMIT_PREV0 =>
|
1034 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV1;
|
1035 |
|
|
when HANDLE_TX_TRANSMIT_PREV1 =>
|
1036 |
|
|
if spi_oper_cmplt = '1' then
|
1037 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV2;
|
1038 |
|
|
end if;
|
1039 |
|
|
when HANDLE_TX_TRANSMIT_PREV2 =>
|
1040 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV3;
|
1041 |
|
|
when HANDLE_TX_TRANSMIT_PREV3 =>
|
1042 |
|
|
if spi_oper_cmplt = '1' then
|
1043 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV4;
|
1044 |
|
|
end if;
|
1045 |
|
|
when HANDLE_TX_TRANSMIT_PREV4 =>
|
1046 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV5;
|
1047 |
|
|
when HANDLE_TX_TRANSMIT_PREV5 =>
|
1048 |
|
|
if spi_oper_cmplt = '1' then
|
1049 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV6;
|
1050 |
|
|
end if;
|
1051 |
|
|
when HANDLE_TX_TRANSMIT_PREV6 =>
|
1052 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV7;
|
1053 |
|
|
when HANDLE_TX_TRANSMIT_PREV7 =>
|
1054 |
|
|
if spi_oper_cmplt = '1' then
|
1055 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV8;
|
1056 |
|
|
end if;
|
1057 |
|
|
when HANDLE_TX_TRANSMIT_PREV8 =>
|
1058 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV9;
|
1059 |
|
|
when HANDLE_TX_TRANSMIT_PREV9 =>
|
1060 |
|
|
if spi_oper_cmplt = '1' then
|
1061 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV10;
|
1062 |
|
|
end if;
|
1063 |
|
|
when HANDLE_TX_TRANSMIT_PREV10 =>
|
1064 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV11;
|
1065 |
|
|
when HANDLE_TX_TRANSMIT_PREV11 =>
|
1066 |
|
|
if spi_oper_cmplt = '1' then
|
1067 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV12;
|
1068 |
|
|
end if;
|
1069 |
|
|
when HANDLE_TX_TRANSMIT_PREV12 =>
|
1070 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV13;
|
1071 |
|
|
when HANDLE_TX_TRANSMIT_PREV13 =>
|
1072 |
|
|
if spi_oper_cmplt = '1' then
|
1073 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV14;
|
1074 |
|
|
end if;
|
1075 |
|
|
when HANDLE_TX_TRANSMIT_PREV14 =>
|
1076 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV15;
|
1077 |
|
|
when HANDLE_TX_TRANSMIT_PREV15 =>
|
1078 |
|
|
if spi_oper_cmplt = '1' then
|
1079 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT_PREV16;
|
1080 |
|
|
end if;
|
1081 |
|
|
when HANDLE_TX_TRANSMIT_PREV16 =>
|
1082 |
|
|
eth_next_state <= WAIT_FOR_TRANSMIT_CMPLT;
|
1083 |
|
|
when WAIT_FOR_TRANSMIT_CMPLT =>
|
1084 |
|
|
if tx_timeout_counter = '0'&X"00000" then
|
1085 |
|
|
eth_next_state <= PRE_TX_TRANSMIT0;
|
1086 |
|
|
end if;
|
1087 |
|
|
|
1088 |
|
|
when RESEND_ACK_IN_BUFFER =>
|
1089 |
|
|
eth_next_state <= HANDLE_TX_TRANSMIT15;
|
1090 |
|
|
|
1091 |
|
|
end case;
|
1092 |
|
|
end process;
|
1093 |
|
|
|
1094 |
|
|
WR_CONTINUOUS_PROC :process(CLK_IN)
|
1095 |
|
|
begin
|
1096 |
|
|
if rising_edge(CLK_IN) then
|
1097 |
|
|
if eth_state = HANDLE_TX_TRANSMIT6 then
|
1098 |
|
|
spi_wr_continuous <= '1';
|
1099 |
|
|
elsif tx_packet_length_counter = X"0000" then
|
1100 |
|
|
spi_wr_continuous <= '0';
|
1101 |
|
|
end if;
|
1102 |
|
|
end if;
|
1103 |
|
|
end process;
|
1104 |
|
|
|
1105 |
|
|
POLL_INT_PROC :process(CLK_IN)
|
1106 |
|
|
begin
|
1107 |
|
|
if rising_edge(CLK_IN) then
|
1108 |
|
|
poll_counter <= poll_counter - 1;
|
1109 |
|
|
if poll_counter = X"0" then
|
1110 |
|
|
poll_interrupt_reg <= '1';
|
1111 |
|
|
else
|
1112 |
|
|
poll_interrupt_reg <= '0';
|
1113 |
|
|
end if;
|
1114 |
|
|
if INIT_ENC28J60 = '1' then
|
1115 |
|
|
init_enc28j60_waiting <= '1';
|
1116 |
|
|
elsif eth_state = HANDLE_INIT_CMND0 then
|
1117 |
|
|
init_enc28j60_waiting <= '0';
|
1118 |
|
|
end if;
|
1119 |
|
|
if DHCP_CONNECT = '1' then
|
1120 |
|
|
dhcp_connect_waiting <= '1';
|
1121 |
|
|
elsif eth_state = TRIGGER_DHCP_DISCOVER then
|
1122 |
|
|
dhcp_connect_waiting <= '0';
|
1123 |
|
|
end if;
|
1124 |
|
|
if eth_state = TRIGGER_TCP_TX0 or tx_packets_no_ack > X"1"
|
1125 |
|
|
or wait_for_tcp_window_size_update = '1' then
|
1126 |
|
|
tcp_data_flush_waiting <= '0';
|
1127 |
|
|
elsif tcp_wr_data_flush = '1' and tcp_connection_active = '1' then
|
1128 |
|
|
tcp_data_flush_waiting <= '1';
|
1129 |
|
|
end if;
|
1130 |
|
|
if unsigned(tcp_wr_data_count) < X"580" or tcp_connection_active = '0'
|
1131 |
|
|
or tx_packets_no_ack > X"1" or wait_for_tcp_window_size_update = '1' then
|
1132 |
|
|
large_tx_packet_waiting <= '0';
|
1133 |
|
|
else
|
1134 |
|
|
large_tx_packet_waiting <= '1';
|
1135 |
|
|
end if;
|
1136 |
|
|
if trigger_send_prev_packet = '1' then
|
1137 |
|
|
send_prev_packet_waiting <= '1';
|
1138 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV0 then
|
1139 |
|
|
send_prev_packet_waiting <= '0';
|
1140 |
|
|
end if;
|
1141 |
|
|
end if;
|
1142 |
|
|
end process;
|
1143 |
|
|
|
1144 |
|
|
TX_PACKET_LENGTH_PROC :process(CLK_IN)
|
1145 |
|
|
begin
|
1146 |
|
|
if rising_edge(CLK_IN) then
|
1147 |
|
|
if eth_state = HANDLE_TX_TRANSMIT5 then
|
1148 |
|
|
tx_packet_length_counter <= tx_packet_length;
|
1149 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT9 then
|
1150 |
|
|
tx_packet_length_counter <= tx_packet_length_counter - 1;
|
1151 |
|
|
end if;
|
1152 |
|
|
if eth_state = HANDLE_TX_TRANSMIT5 then
|
1153 |
|
|
tx_packet_ram_rd_addr <= "00000000000";
|
1154 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT9 then
|
1155 |
|
|
tx_packet_ram_rd_addr <= tx_packet_ram_rd_addr + 1;
|
1156 |
|
|
end if;
|
1157 |
|
|
end if;
|
1158 |
|
|
end process;
|
1159 |
|
|
|
1160 |
|
|
INIT_ADDR_PROC: process(CLK_IN)
|
1161 |
|
|
begin
|
1162 |
|
|
if rising_edge(CLK_IN) then
|
1163 |
|
|
if eth_state = HANDLE_INIT_CMND0 then
|
1164 |
|
|
init_cmnd_addr <= unsigned(C_init_cmnds_start_addr);
|
1165 |
|
|
elsif eth_state = HANDLE_INIT_CMND3 then
|
1166 |
|
|
init_cmnd_addr <= init_cmnd_addr + 1;
|
1167 |
|
|
end if;
|
1168 |
|
|
end if;
|
1169 |
|
|
end process;
|
1170 |
|
|
|
1171 |
|
|
SLOW_CS_PROC: process(CLK_IN)
|
1172 |
|
|
begin
|
1173 |
|
|
if rising_edge(CLK_IN) then
|
1174 |
|
|
if eth_state = HANDLE_INIT_CMND0 then
|
1175 |
|
|
slow_cs_en <= '1';
|
1176 |
|
|
elsif eth_state = IDLE then
|
1177 |
|
|
slow_cs_en <= '0';
|
1178 |
|
|
end if;
|
1179 |
|
|
end if;
|
1180 |
|
|
end process;
|
1181 |
|
|
|
1182 |
|
|
FRAME_ADDR_PROC: process(CLK_IN)
|
1183 |
|
|
begin
|
1184 |
|
|
if rising_edge(CLK_IN) then
|
1185 |
|
|
if eth_state = HANDLE_INIT_CMND1 then
|
1186 |
|
|
frame_addr <= "000" & slv(init_cmnd_addr);
|
1187 |
|
|
end if;
|
1188 |
|
|
end if;
|
1189 |
|
|
end process;
|
1190 |
|
|
|
1191 |
|
|
SETTINGS_PROC: process(CLK_IN)
|
1192 |
|
|
begin
|
1193 |
|
|
if rising_edge(CLK_IN) then
|
1194 |
|
|
if eth_state = HANDLE_INIT_CMND0 then
|
1195 |
|
|
network_interface_enabled <= '0';
|
1196 |
|
|
elsif eth_state = HANDLE_INIT_CMND6 then
|
1197 |
|
|
network_interface_enabled <= '1'; -- TODO add disable code
|
1198 |
|
|
end if;
|
1199 |
|
|
end if;
|
1200 |
|
|
end process;
|
1201 |
|
|
|
1202 |
|
|
SPI_WR_PROC: process(CLK_IN)
|
1203 |
|
|
begin
|
1204 |
|
|
if rising_edge(CLK_IN) then
|
1205 |
|
|
if eth_state = HANDLE_INIT_CMND3 then
|
1206 |
|
|
spi_we <= '1';
|
1207 |
|
|
elsif eth_state = SERVICE_INTERRUPT0 then
|
1208 |
|
|
spi_we <= '1';
|
1209 |
|
|
elsif eth_state = SERVICE_INTERRUPT6 then
|
1210 |
|
|
spi_we <= '1';
|
1211 |
|
|
elsif eth_state = HANDLE_TX_INTERRUPT0 then
|
1212 |
|
|
spi_we <= '1';
|
1213 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT5 then
|
1214 |
|
|
spi_we <= '1';
|
1215 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT7 then
|
1216 |
|
|
spi_we <= '1';
|
1217 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT9 then
|
1218 |
|
|
spi_we <= '1';
|
1219 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT11 then
|
1220 |
|
|
spi_we <= '1';
|
1221 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT13 then
|
1222 |
|
|
spi_we <= '1';
|
1223 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT15 then
|
1224 |
|
|
spi_we <= '1';
|
1225 |
|
|
elsif eth_state = PRE_TX_TRANSMIT0 then
|
1226 |
|
|
spi_we <= '1';
|
1227 |
|
|
elsif eth_state = PRE_TX_TRANSMIT2 then
|
1228 |
|
|
spi_we <= '1';
|
1229 |
|
|
elsif eth_state = PRE_TX_TRANSMIT4 then
|
1230 |
|
|
spi_we <= '1';
|
1231 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT0 then
|
1232 |
|
|
spi_we <= '1';
|
1233 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT2 then
|
1234 |
|
|
spi_we <= '1';
|
1235 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT4 then
|
1236 |
|
|
spi_we <= '1';
|
1237 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT6 then
|
1238 |
|
|
spi_we <= '1';
|
1239 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT11 then
|
1240 |
|
|
spi_we <= '1';
|
1241 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT13 then
|
1242 |
|
|
spi_we <= '1';
|
1243 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT15 then
|
1244 |
|
|
spi_we <= '1';
|
1245 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT17 then
|
1246 |
|
|
spi_we <= '1';
|
1247 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV0 then
|
1248 |
|
|
spi_we <= '1';
|
1249 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV2 then
|
1250 |
|
|
spi_we <= '1';
|
1251 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV4 then
|
1252 |
|
|
spi_we <= '1';
|
1253 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV6 then
|
1254 |
|
|
spi_we <= '1';
|
1255 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV8 then
|
1256 |
|
|
spi_we <= '1';
|
1257 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV10 then
|
1258 |
|
|
spi_we <= '1';
|
1259 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV12 then
|
1260 |
|
|
spi_we <= '1';
|
1261 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV14 then
|
1262 |
|
|
spi_we <= '1';
|
1263 |
|
|
else
|
1264 |
|
|
spi_we <= '0';
|
1265 |
|
|
end if;
|
1266 |
|
|
end if;
|
1267 |
|
|
end process;
|
1268 |
|
|
|
1269 |
|
|
SPI_ADDR_PROC: process(CLK_IN)
|
1270 |
|
|
begin
|
1271 |
|
|
if rising_edge(CLK_IN) then
|
1272 |
|
|
if eth_state = HANDLE_INIT_CMND3 then
|
1273 |
|
|
spi_wr_addr <= frame_data(15 downto 8);
|
1274 |
|
|
elsif eth_state = SERVICE_INTERRUPT0 then
|
1275 |
|
|
spi_wr_addr <= X"BB";
|
1276 |
|
|
elsif eth_state = HANDLE_TX_INTERRUPT0 then
|
1277 |
|
|
spi_wr_addr <= X"BC";
|
1278 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT5 then
|
1279 |
|
|
spi_wr_addr <= X"BF";
|
1280 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT7 then
|
1281 |
|
|
spi_wr_addr <= X"4C";
|
1282 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT9 then
|
1283 |
|
|
spi_wr_addr <= X"4D";
|
1284 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT11 then
|
1285 |
|
|
spi_wr_addr <= X"40";
|
1286 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT13 then
|
1287 |
|
|
spi_wr_addr <= X"41";
|
1288 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT15 then
|
1289 |
|
|
spi_wr_addr <= X"9E";
|
1290 |
|
|
elsif eth_state = SERVICE_INTERRUPT6 then
|
1291 |
|
|
spi_wr_addr <= X"9B";
|
1292 |
|
|
elsif eth_state = PRE_TX_TRANSMIT0 then
|
1293 |
|
|
spi_wr_addr <= X"BF";
|
1294 |
|
|
elsif eth_state = PRE_TX_TRANSMIT2 then
|
1295 |
|
|
spi_wr_addr <= X"42";
|
1296 |
|
|
elsif eth_state = PRE_TX_TRANSMIT4 then
|
1297 |
|
|
spi_wr_addr <= X"43";
|
1298 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT0 then
|
1299 |
|
|
spi_wr_addr <= X"44";
|
1300 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT2 then
|
1301 |
|
|
spi_wr_addr <= X"45";
|
1302 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT4 then
|
1303 |
|
|
spi_wr_addr <= X"7A";
|
1304 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT6 then
|
1305 |
|
|
spi_wr_addr <= X"7A";
|
1306 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT11 then
|
1307 |
|
|
spi_wr_addr <= X"46";
|
1308 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT13 then
|
1309 |
|
|
spi_wr_addr <= X"47";
|
1310 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT15 then
|
1311 |
|
|
spi_wr_addr <= X"BC";
|
1312 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT17 then
|
1313 |
|
|
spi_wr_addr <= X"9F";
|
1314 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV0 then
|
1315 |
|
|
spi_wr_addr <= X"BF";
|
1316 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV2 then
|
1317 |
|
|
spi_wr_addr <= X"42";
|
1318 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV4 then
|
1319 |
|
|
spi_wr_addr <= X"43";
|
1320 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV6 then
|
1321 |
|
|
spi_wr_addr <= X"44";
|
1322 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV8 then
|
1323 |
|
|
spi_wr_addr <= X"45";
|
1324 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV10 then
|
1325 |
|
|
spi_wr_addr <= X"46";
|
1326 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV12 then
|
1327 |
|
|
spi_wr_addr <= X"47";
|
1328 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV14 then
|
1329 |
|
|
spi_wr_addr <= X"9F";
|
1330 |
|
|
end if;
|
1331 |
|
|
end if;
|
1332 |
|
|
end process;
|
1333 |
|
|
|
1334 |
|
|
SPI_DATA_PROC: process(CLK_IN)
|
1335 |
|
|
begin
|
1336 |
|
|
if rising_edge(CLK_IN) then
|
1337 |
|
|
if eth_state = HANDLE_INIT_CMND3 then
|
1338 |
|
|
spi_wr_data <= frame_data(7 downto 0);
|
1339 |
|
|
elsif eth_state = SERVICE_INTERRUPT0 then
|
1340 |
|
|
spi_wr_data <= X"80";
|
1341 |
|
|
elsif eth_state = HANDLE_TX_INTERRUPT0 then
|
1342 |
|
|
spi_wr_data <= X"08";
|
1343 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT5 then
|
1344 |
|
|
spi_wr_data <= X"03";
|
1345 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT7 then
|
1346 |
|
|
spi_wr_data <= next_packet_pointer(7 downto 0);
|
1347 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT9 then
|
1348 |
|
|
spi_wr_data <= next_packet_pointer(15 downto 8);
|
1349 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT11 then
|
1350 |
|
|
spi_wr_data <= next_packet_pointer(7 downto 0);
|
1351 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT13 then
|
1352 |
|
|
spi_wr_data <= next_packet_pointer(15 downto 8);
|
1353 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT15 then
|
1354 |
|
|
spi_wr_data <= X"40";
|
1355 |
|
|
elsif eth_state = SERVICE_INTERRUPT6 then
|
1356 |
|
|
spi_wr_data <= X"80";
|
1357 |
|
|
elsif eth_state = PRE_TX_TRANSMIT0 then
|
1358 |
|
|
spi_wr_data <= X"03";
|
1359 |
|
|
elsif eth_state = PRE_TX_TRANSMIT2 then
|
1360 |
|
|
spi_wr_data <= slv(tx_base_addr(7 downto 0));
|
1361 |
|
|
elsif eth_state = PRE_TX_TRANSMIT4 then
|
1362 |
|
|
spi_wr_data <= slv(tx_base_addr(15 downto 8));
|
1363 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT0 then
|
1364 |
|
|
spi_wr_data <= slv(tx_base_addr(7 downto 0));
|
1365 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT2 then
|
1366 |
|
|
spi_wr_data <= slv(tx_base_addr(15 downto 8));
|
1367 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT4 then
|
1368 |
|
|
spi_wr_data <= X"00";
|
1369 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT6 then
|
1370 |
|
|
spi_wr_data <= tx_packet_rd_data;
|
1371 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT10 then
|
1372 |
|
|
spi_wr_data <= tx_packet_rd_data;
|
1373 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT11 then
|
1374 |
|
|
spi_wr_data <= slv(tx_packet_end_pointer(7 downto 0));
|
1375 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT13 then
|
1376 |
|
|
spi_wr_data <= slv(tx_packet_end_pointer(15 downto 8));
|
1377 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT15 then
|
1378 |
|
|
spi_wr_data <= X"08";
|
1379 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT17 then
|
1380 |
|
|
spi_wr_data <= X"08";
|
1381 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV0 then
|
1382 |
|
|
spi_wr_data <= X"03";
|
1383 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV2 then
|
1384 |
|
|
spi_wr_data <= slv(tx_base_addr(7 downto 0));
|
1385 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV4 then
|
1386 |
|
|
spi_wr_data <= slv(tx_base_addr(15 downto 8));
|
1387 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV6 then
|
1388 |
|
|
spi_wr_data <= slv(tx_base_addr(7 downto 0));
|
1389 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV8 then
|
1390 |
|
|
spi_wr_data <= slv(tx_base_addr(15 downto 8));
|
1391 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV10 then
|
1392 |
|
|
spi_wr_data <= slv(prev_tx_packet_end_pointer(7 downto 0));
|
1393 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV12 then
|
1394 |
|
|
spi_wr_data <= slv(prev_tx_packet_end_pointer(15 downto 8));
|
1395 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT_PREV14 then
|
1396 |
|
|
spi_wr_data <= X"08";
|
1397 |
|
|
end if;
|
1398 |
|
|
end if;
|
1399 |
|
|
end process;
|
1400 |
|
|
|
1401 |
|
|
COMMAND_CMPLT_PROC: process(CLK_IN)
|
1402 |
|
|
begin
|
1403 |
|
|
if rising_edge(CLK_IN) then
|
1404 |
|
|
if eth_state /= IDLE and eth_next_state = IDLE then
|
1405 |
|
|
command_cmplt <= '1';
|
1406 |
|
|
elsif eth_state /= IDLE and eth_next_state /= IDLE then
|
1407 |
|
|
command_cmplt <= '0';
|
1408 |
|
|
end if;
|
1409 |
|
|
end if;
|
1410 |
|
|
end process;
|
1411 |
|
|
|
1412 |
|
|
SPI_RD_ADDR_PROC: process(CLK_IN)
|
1413 |
|
|
begin
|
1414 |
|
|
if rising_edge(CLK_IN) then
|
1415 |
|
|
if eth_state = SERVICE_INTERRUPT2 then
|
1416 |
|
|
spi_rd_addr <= X"1C";
|
1417 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT0 then
|
1418 |
|
|
spi_rd_addr <= X"3A";
|
1419 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT2 then
|
1420 |
|
|
spi_rd_addr <= X"3A";
|
1421 |
|
|
elsif eth_state = COPY_RX_PACKET_TO_BUF1 then
|
1422 |
|
|
spi_rd_addr <= X"3A";
|
1423 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT19 then
|
1424 |
|
|
spi_rd_addr <= X"1C";
|
1425 |
|
|
end if;
|
1426 |
|
|
end if;
|
1427 |
|
|
end process;
|
1428 |
|
|
|
1429 |
|
|
SPI_RD_FLAG_PROC: process(CLK_IN)
|
1430 |
|
|
begin
|
1431 |
|
|
if rising_edge(CLK_IN) then
|
1432 |
|
|
if eth_state = SERVICE_INTERRUPT2 then
|
1433 |
|
|
spi_rd <= '1';
|
1434 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT0 then
|
1435 |
|
|
spi_rd <= '1';
|
1436 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT2 then
|
1437 |
|
|
spi_rd <= '1';
|
1438 |
|
|
elsif eth_state = COPY_RX_PACKET_TO_BUF1 then
|
1439 |
|
|
spi_rd <= '1';
|
1440 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT19 then
|
1441 |
|
|
spi_rd <= '1';
|
1442 |
|
|
else
|
1443 |
|
|
spi_rd <= '0';
|
1444 |
|
|
end if;
|
1445 |
|
|
end if;
|
1446 |
|
|
end process;
|
1447 |
|
|
|
1448 |
|
|
RD_CONTINUOUS_PROC: process(CLK_IN)
|
1449 |
|
|
begin
|
1450 |
|
|
if rising_edge(CLK_IN) then
|
1451 |
|
|
if eth_state = COPY_RX_PACKET_TO_BUF1 then
|
1452 |
|
|
spi_rd_continuous <= '1';
|
1453 |
|
|
elsif eth_state = COPY_RX_PACKET_TO_BUF5 then
|
1454 |
|
|
spi_rd_continuous <= '0';
|
1455 |
|
|
end if;
|
1456 |
|
|
end if;
|
1457 |
|
|
end process;
|
1458 |
|
|
|
1459 |
|
|
ENC_VERSION_PROC: process(CLK_IN)
|
1460 |
|
|
begin
|
1461 |
|
|
if rising_edge(CLK_IN) then
|
1462 |
|
|
if eth_state = SERVICE_INTERRUPT4 then
|
1463 |
|
|
eir_register <= spi_data_rd;
|
1464 |
|
|
end if;
|
1465 |
|
|
if eth_state = HANDLE_RX_INTERRUPT2 then
|
1466 |
|
|
next_packet_pointer(7 downto 0) <= spi_data_rd;
|
1467 |
|
|
end if;
|
1468 |
|
|
if eth_state = HANDLE_RX_INTERRUPT4 then
|
1469 |
|
|
next_packet_pointer(15 downto 8) <= spi_data_rd;
|
1470 |
|
|
end if;
|
1471 |
|
|
end if;
|
1472 |
|
|
end process;
|
1473 |
|
|
|
1474 |
|
|
------------------------- RX PACKET --------------------------------
|
1475 |
|
|
|
1476 |
|
|
handle_rx_packet <= '1' when eth_state = COPY_RX_PACKET_TO_BUF6 else '0';
|
1477 |
|
|
trigger_ack <= '1' when eth_state = TRIGGER_ACK_PACKET else '0';
|
1478 |
|
|
handle_tx_packet <= '1' when eth_state = TRIGGER_TCP_TX1 else '0';
|
1479 |
|
|
|
1480 |
|
|
process(CLK_IN)
|
1481 |
|
|
begin
|
1482 |
|
|
if rising_edge(CLK_IN) then
|
1483 |
|
|
if eth_state = HANDLE_RX_INTERRUPT0 then
|
1484 |
|
|
debug_rx_flag <= '1';
|
1485 |
|
|
elsif eth_state = HANDLE_RX_INTERRUPT17 then
|
1486 |
|
|
debug_rx_flag <= '0';
|
1487 |
|
|
end if;
|
1488 |
|
|
end if;
|
1489 |
|
|
end process;
|
1490 |
|
|
|
1491 |
|
|
RX_PACKET_WR_ADDR: process(CLK_IN)
|
1492 |
|
|
begin
|
1493 |
|
|
if rising_edge(CLK_IN) then
|
1494 |
|
|
if eth_state = COPY_RX_PACKET_TO_BUF0 then
|
1495 |
|
|
rx_packet_ram_we_addr_buf <= "00000000000";
|
1496 |
|
|
elsif eth_state = COPY_RX_PACKET_TO_BUF3 then
|
1497 |
|
|
rx_packet_ram_we_addr_buf <= rx_packet_ram_we_addr_buf + 1;
|
1498 |
|
|
end if;
|
1499 |
|
|
if eth_state = HANDLE_RX_INTERRUPT5 then
|
1500 |
|
|
previous_packet_pointer <= unsigned(next_packet_pointer);
|
1501 |
|
|
elsif eth_state = COPY_RX_PACKET_TO_BUF3 then
|
1502 |
|
|
if previous_packet_pointer = C_rx_pointer_max then
|
1503 |
|
|
previous_packet_pointer <= C_rx_pointer_min;
|
1504 |
|
|
else
|
1505 |
|
|
previous_packet_pointer <= previous_packet_pointer + 1;
|
1506 |
|
|
end if;
|
1507 |
|
|
end if;
|
1508 |
|
|
end if;
|
1509 |
|
|
end process;
|
1510 |
|
|
|
1511 |
|
|
rx_packet_ram_we <= '1' when eth_state = COPY_RX_PACKET_TO_BUF3 else '0';
|
1512 |
|
|
rx_packet_ram_we_addr <= rx_packet_ram_we_addr_buf when doing_tx_packet_config = '0' else rx_packet_rd2_addr;
|
1513 |
|
|
|
1514 |
|
|
RX_PACKET_RAM : TDP_RAM
|
1515 |
|
|
Generic Map ( G_DATA_A_SIZE => spi_data_rd'length,
|
1516 |
|
|
G_ADDR_A_SIZE => rx_packet_ram_we_addr'length,
|
1517 |
|
|
G_RELATION => 0, --log2(SIZE_A/SIZE_B)
|
1518 |
|
|
G_INIT_ZERO => true,
|
1519 |
|
|
G_INIT_FILE => "")
|
1520 |
|
|
Port Map ( CLK_A_IN => CLK_IN,
|
1521 |
|
|
WE_A_IN => rx_packet_ram_we,
|
1522 |
|
|
ADDR_A_IN => slv(rx_packet_ram_we_addr),
|
1523 |
|
|
DATA_A_IN => spi_data_rd,
|
1524 |
|
|
DATA_A_OUT => rx_packet_rd_data2,
|
1525 |
|
|
CLK_B_IN => CLK_IN,
|
1526 |
|
|
WE_B_IN => '0',
|
1527 |
|
|
ADDR_B_IN => slv(rx_packet_ram_rd_addr),
|
1528 |
|
|
DATA_B_IN => X"00",
|
1529 |
|
|
DATA_B_OUT => rx_packet_rd_data);
|
1530 |
|
|
|
1531 |
|
|
PH_SYNC_PROC: process(CLK_IN)
|
1532 |
|
|
begin
|
1533 |
|
|
if rising_edge(CLK_IN) then
|
1534 |
|
|
packet_handler_state <= packet_handler_next_state;
|
1535 |
|
|
end if;
|
1536 |
|
|
end process;
|
1537 |
|
|
|
1538 |
|
|
rx_packet_handled <= '1' when packet_handler_state = COMPLETE else '0';
|
1539 |
|
|
|
1540 |
|
|
send_arp_reply <= '1' when packet_handler_state = TRIGGER_ARP_REPLY else '0';
|
1541 |
|
|
send_icmp_reply <= '1' when packet_handler_state = TRIGGER_ICMP_PACKET_REPLY else '0';
|
1542 |
|
|
send_dhcp_request <= '1' when packet_handler_state = TRIGGER_DHCP_REQUEST else '0';
|
1543 |
|
|
send_tcp_ack_packet <= '1' when packet_handler_state = TRIGGER_TCP_ACK3 else '0';
|
1544 |
|
|
send_tcp_tx_packet <= '1' when packet_handler_state = TRIGGER_TCP_PSH_ACK2 else '0';
|
1545 |
|
|
|
1546 |
|
|
send_arp_request <= '1' when eth_state = TRIGGER_ARP_REQUEST else '0';
|
1547 |
|
|
send_dhcp_discover <= '1' when eth_state = TRIGGER_DHCP_DISCOVER else '0';
|
1548 |
|
|
cancel_dhcp_connect <= '1' when eth_state = TRIGGER_CANCEL_DHCP_CONNECT else '0';
|
1549 |
|
|
close_tcp_connection <= '1' when eth_state = TRIGGER_CLOSE_TCP_CONNECTION else '0';
|
1550 |
|
|
cancel_tcp_connection <= '1' when eth_state = TRIGGER_CANCEL_TCP_CONNECTION else '0';
|
1551 |
|
|
|
1552 |
|
|
PH_NEXT_STATE_DECODE: process (packet_handler_state, handle_rx_packet, rx_packet_status_vector(23), rx_tcp_flags,
|
1553 |
|
|
rx_packet_type, arp_target_ip_addr, rx_tcp_option, tcp_option_addr, total_packet_length,
|
1554 |
|
|
rx_tcp_option_length, arp_opcode, expecting_arp_reply, ip_addr, tx_packet_config_cmplt,
|
1555 |
|
|
ip_packet_version, ip_packet_destination_ip, dhcp_enable, dhcp_addr_locked, ip_packet_protocol,
|
1556 |
|
|
ip_packet_length, udp_source_port, udp_dest_port, dhcp_transaction_id, transaction_id_rd,
|
1557 |
|
|
dhcp_magic_cookie, dhcp_option, dhcp_option_length, dhcp_option_addr, expecting_syn_ack,
|
1558 |
|
|
dhcp_message_type, expecting_dhcp_offer, expecting_dhcp_ack, rx_tcp_source_port,
|
1559 |
|
|
listen_port, rx_tcp_dest_port, client_port, ping_enable, rx_tcp_header_length, tcp_sequence_number_p1,
|
1560 |
|
|
rx_tcp_ack_number, tcp_sequence_number, tcp_acknowledge_number, rx_tcp_seq_number, rx_packet_ram_rd_addr,
|
1561 |
|
|
tx_packet_state)
|
1562 |
|
|
begin
|
1563 |
|
|
packet_handler_next_state <= packet_handler_state; --default is to stay in current state
|
1564 |
|
|
case (packet_handler_state) is
|
1565 |
|
|
when IDLE =>
|
1566 |
|
|
if tx_packet_state = IDLE then -- only configure new packet if currently not transmitting a packet
|
1567 |
|
|
if handle_rx_packet = '1' then
|
1568 |
|
|
packet_handler_next_state <= PARSE_SOURCE_MAC0;
|
1569 |
|
|
elsif trigger_ack = '1' then
|
1570 |
|
|
packet_handler_next_state <= TRIGGER_TCP_ACK0;
|
1571 |
|
|
elsif handle_tx_packet = '1' then
|
1572 |
|
|
packet_handler_next_state <= CHECK_IF_DATA_TO_SEND;
|
1573 |
|
|
end if;
|
1574 |
|
|
end if;
|
1575 |
|
|
when PARSE_SOURCE_MAC0 =>
|
1576 |
|
|
packet_handler_next_state <= PARSE_SOURCE_MAC1;
|
1577 |
|
|
when PARSE_SOURCE_MAC1 =>
|
1578 |
|
|
packet_handler_next_state <= PARSE_SOURCE_MAC2;
|
1579 |
|
|
when PARSE_SOURCE_MAC2 =>
|
1580 |
|
|
packet_handler_next_state <= PARSE_SOURCE_MAC3;
|
1581 |
|
|
when PARSE_SOURCE_MAC3 =>
|
1582 |
|
|
packet_handler_next_state <= PARSE_SOURCE_MAC4;
|
1583 |
|
|
when PARSE_SOURCE_MAC4 =>
|
1584 |
|
|
packet_handler_next_state <= PARSE_SOURCE_MAC5;
|
1585 |
|
|
when PARSE_SOURCE_MAC5 =>
|
1586 |
|
|
packet_handler_next_state <= PARSE_SOURCE_MAC6;
|
1587 |
|
|
when PARSE_SOURCE_MAC6 =>
|
1588 |
|
|
packet_handler_next_state <= PARSE_SOURCE_MAC7;
|
1589 |
|
|
when PARSE_SOURCE_MAC7 =>
|
1590 |
|
|
packet_handler_next_state <= PARSE_PACKET_TYPE0;
|
1591 |
|
|
when PARSE_PACKET_TYPE0 =>
|
1592 |
|
|
packet_handler_next_state <= PARSE_PACKET_TYPE1;
|
1593 |
|
|
when PARSE_PACKET_TYPE1 =>
|
1594 |
|
|
packet_handler_next_state <= PARSE_PACKET_TYPE2;
|
1595 |
|
|
when PARSE_PACKET_TYPE2 =>
|
1596 |
|
|
packet_handler_next_state <= PARSE_PACKET_TYPE3;
|
1597 |
|
|
when PARSE_PACKET_TYPE3 =>
|
1598 |
|
|
packet_handler_next_state <= PARSE_PACKET_TYPE4;
|
1599 |
|
|
when PARSE_PACKET_TYPE4 =>
|
1600 |
|
|
if rx_packet_type = C_ARP_Packet_Type then
|
1601 |
|
|
packet_handler_next_state <= HANDLE_ARP_PACKET0;
|
1602 |
|
|
elsif rx_packet_type = C_IP_Packet_Type then
|
1603 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET0;
|
1604 |
|
|
else
|
1605 |
|
|
packet_handler_next_state <= COMPLETE;
|
1606 |
|
|
end if;
|
1607 |
|
|
|
1608 |
|
|
when HANDLE_ARP_PACKET0 =>
|
1609 |
|
|
packet_handler_next_state <= HANDLE_ARP_PACKET1;
|
1610 |
|
|
when HANDLE_ARP_PACKET1 =>
|
1611 |
|
|
packet_handler_next_state <= HANDLE_ARP_PACKET2;
|
1612 |
|
|
when HANDLE_ARP_PACKET2 =>
|
1613 |
|
|
packet_handler_next_state <= HANDLE_ARP_PACKET3;
|
1614 |
|
|
when HANDLE_ARP_PACKET3 =>
|
1615 |
|
|
if arp_opcode = C_ARP_Request then
|
1616 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST0;
|
1617 |
|
|
elsif arp_opcode = C_ARP_Reply then
|
1618 |
|
|
packet_handler_next_state <= HANDLE_ARP_REPLY0;
|
1619 |
|
|
else
|
1620 |
|
|
packet_handler_next_state <= COMPLETE;
|
1621 |
|
|
end if;
|
1622 |
|
|
|
1623 |
|
|
when HANDLE_ARP_REPLY0 =>
|
1624 |
|
|
if expecting_arp_reply = '1' then
|
1625 |
|
|
packet_handler_next_state <= HANDLE_ARP_REPLY1;
|
1626 |
|
|
else
|
1627 |
|
|
packet_handler_next_state <= COMPLETE;
|
1628 |
|
|
end if;
|
1629 |
|
|
when HANDLE_ARP_REPLY1 =>
|
1630 |
|
|
packet_handler_next_state <= HANDLE_ARP_REPLY2;
|
1631 |
|
|
when HANDLE_ARP_REPLY2 =>
|
1632 |
|
|
packet_handler_next_state <= HANDLE_ARP_REPLY3;
|
1633 |
|
|
when HANDLE_ARP_REPLY3 =>
|
1634 |
|
|
packet_handler_next_state <= HANDLE_ARP_REPLY4;
|
1635 |
|
|
when HANDLE_ARP_REPLY4 =>
|
1636 |
|
|
packet_handler_next_state <= HANDLE_ARP_REPLY5;
|
1637 |
|
|
when HANDLE_ARP_REPLY5 =>
|
1638 |
|
|
packet_handler_next_state <= HANDLE_ARP_REPLY6;
|
1639 |
|
|
when HANDLE_ARP_REPLY6 =>
|
1640 |
|
|
packet_handler_next_state <= HANDLE_ARP_REPLY7;
|
1641 |
|
|
when HANDLE_ARP_REPLY7 =>
|
1642 |
|
|
packet_handler_next_state <= COMPLETE;
|
1643 |
|
|
|
1644 |
|
|
when HANDLE_ARP_REQUEST0 =>
|
1645 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST1;
|
1646 |
|
|
when HANDLE_ARP_REQUEST1 =>
|
1647 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST2;
|
1648 |
|
|
when HANDLE_ARP_REQUEST2 =>
|
1649 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST3;
|
1650 |
|
|
when HANDLE_ARP_REQUEST3 =>
|
1651 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST4;
|
1652 |
|
|
when HANDLE_ARP_REQUEST4 =>
|
1653 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST5;
|
1654 |
|
|
when HANDLE_ARP_REQUEST5 =>
|
1655 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST6;
|
1656 |
|
|
when HANDLE_ARP_REQUEST6 =>
|
1657 |
|
|
if arp_target_ip_addr = ip_addr then
|
1658 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST7;
|
1659 |
|
|
else
|
1660 |
|
|
packet_handler_next_state <= COMPLETE;
|
1661 |
|
|
end if;
|
1662 |
|
|
when HANDLE_ARP_REQUEST7 =>
|
1663 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST8;
|
1664 |
|
|
when HANDLE_ARP_REQUEST8 =>
|
1665 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST9;
|
1666 |
|
|
when HANDLE_ARP_REQUEST9 =>
|
1667 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST10;
|
1668 |
|
|
when HANDLE_ARP_REQUEST10 =>
|
1669 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST11;
|
1670 |
|
|
when HANDLE_ARP_REQUEST11 =>
|
1671 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST12;
|
1672 |
|
|
when HANDLE_ARP_REQUEST12 =>
|
1673 |
|
|
packet_handler_next_state <= HANDLE_ARP_REQUEST13;
|
1674 |
|
|
when HANDLE_ARP_REQUEST13 =>
|
1675 |
|
|
packet_handler_next_state <= TRIGGER_ARP_REPLY;
|
1676 |
|
|
|
1677 |
|
|
when TRIGGER_ARP_REPLY =>
|
1678 |
|
|
if tx_packet_config_cmplt = '1' then
|
1679 |
|
|
packet_handler_next_state <= COMPLETE;
|
1680 |
|
|
end if;
|
1681 |
|
|
|
1682 |
|
|
when HANDLE_IP_PACKET0 =>
|
1683 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET1;
|
1684 |
|
|
when HANDLE_IP_PACKET1 =>
|
1685 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET2;
|
1686 |
|
|
when HANDLE_IP_PACKET2 =>
|
1687 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET3;
|
1688 |
|
|
when HANDLE_IP_PACKET3 =>
|
1689 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET4;
|
1690 |
|
|
when HANDLE_IP_PACKET4 =>
|
1691 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET5;
|
1692 |
|
|
when HANDLE_IP_PACKET5 =>
|
1693 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET6;
|
1694 |
|
|
when HANDLE_IP_PACKET6 =>
|
1695 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET7;
|
1696 |
|
|
when HANDLE_IP_PACKET7 =>
|
1697 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET8;
|
1698 |
|
|
when HANDLE_IP_PACKET8 =>
|
1699 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET9;
|
1700 |
|
|
when HANDLE_IP_PACKET9 =>
|
1701 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET10;
|
1702 |
|
|
when HANDLE_IP_PACKET10 =>
|
1703 |
|
|
if ip_packet_version = C_IPV4_Protocol_Number then
|
1704 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET11;
|
1705 |
|
|
else
|
1706 |
|
|
packet_handler_next_state <= COMPLETE;
|
1707 |
|
|
end if;
|
1708 |
|
|
when HANDLE_IP_PACKET11 =>
|
1709 |
|
|
if ip_packet_destination_ip = ip_addr then
|
1710 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET12;
|
1711 |
|
|
elsif dhcp_enable = '1' and dhcp_addr_locked = '0' then
|
1712 |
|
|
packet_handler_next_state <= HANDLE_IP_PACKET12;
|
1713 |
|
|
else
|
1714 |
|
|
packet_handler_next_state <= COMPLETE;
|
1715 |
|
|
end if;
|
1716 |
|
|
when HANDLE_IP_PACKET12 =>
|
1717 |
|
|
if ip_packet_protocol = C_ICMP_Protocol_Number then
|
1718 |
|
|
packet_handler_next_state <= PRE_ICMP_PACKET_REPLY;
|
1719 |
|
|
elsif ip_packet_protocol = C_UDP_Protocol_Number then
|
1720 |
|
|
packet_handler_next_state <= PARSE_UDP_PACKET0;
|
1721 |
|
|
elsif ip_packet_protocol = C_TCP_Protocol_Number then
|
1722 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET0;
|
1723 |
|
|
else
|
1724 |
|
|
packet_handler_next_state <= COMPLETE;
|
1725 |
|
|
end if;
|
1726 |
|
|
|
1727 |
|
|
when PRE_ICMP_PACKET_REPLY =>
|
1728 |
|
|
if ip_packet_length = C_ICMP_Ping_Length and ping_enable = '1' then
|
1729 |
|
|
packet_handler_next_state <= TRIGGER_ICMP_PACKET_REPLY;
|
1730 |
|
|
else
|
1731 |
|
|
packet_handler_next_state <= COMPLETE;
|
1732 |
|
|
end if;
|
1733 |
|
|
when TRIGGER_ICMP_PACKET_REPLY =>
|
1734 |
|
|
if tx_packet_config_cmplt = '1' then
|
1735 |
|
|
packet_handler_next_state <= COMPLETE;
|
1736 |
|
|
end if;
|
1737 |
|
|
|
1738 |
|
|
when PARSE_UDP_PACKET0 =>
|
1739 |
|
|
packet_handler_next_state <= PARSE_UDP_PACKET1;
|
1740 |
|
|
when PARSE_UDP_PACKET1 =>
|
1741 |
|
|
packet_handler_next_state <= PARSE_UDP_PACKET2;
|
1742 |
|
|
when PARSE_UDP_PACKET2 =>
|
1743 |
|
|
packet_handler_next_state <= PARSE_UDP_PACKET3;
|
1744 |
|
|
when PARSE_UDP_PACKET3 =>
|
1745 |
|
|
packet_handler_next_state <= PARSE_UDP_PACKET4;
|
1746 |
|
|
when PARSE_UDP_PACKET4 =>
|
1747 |
|
|
packet_handler_next_state <= PARSE_UDP_PACKET5;
|
1748 |
|
|
when PARSE_UDP_PACKET5 =>
|
1749 |
|
|
packet_handler_next_state <= PARSE_UDP_PACKET_TYPE0;
|
1750 |
|
|
when PARSE_UDP_PACKET_TYPE0 =>
|
1751 |
|
|
if udp_source_port = C_DHCP_Source_Port then
|
1752 |
|
|
packet_handler_next_state <= PARSE_UDP_PACKET_TYPE1;
|
1753 |
|
|
else
|
1754 |
|
|
packet_handler_next_state <= COMPLETE;
|
1755 |
|
|
end if;
|
1756 |
|
|
when PARSE_UDP_PACKET_TYPE1 =>
|
1757 |
|
|
if udp_dest_port = C_DHCP_Dest_Port then
|
1758 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET0;
|
1759 |
|
|
else
|
1760 |
|
|
packet_handler_next_state <= COMPLETE;
|
1761 |
|
|
end if;
|
1762 |
|
|
|
1763 |
|
|
when PARSE_DHCP_PACKET0 =>
|
1764 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET1;
|
1765 |
|
|
when PARSE_DHCP_PACKET1 =>
|
1766 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET2;
|
1767 |
|
|
when PARSE_DHCP_PACKET2 =>
|
1768 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET3;
|
1769 |
|
|
when PARSE_DHCP_PACKET3 =>
|
1770 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET4;
|
1771 |
|
|
when PARSE_DHCP_PACKET4 =>
|
1772 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET5;
|
1773 |
|
|
when PARSE_DHCP_PACKET5 =>
|
1774 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET6;
|
1775 |
|
|
when PARSE_DHCP_PACKET6 =>
|
1776 |
|
|
if dhcp_transaction_id = transaction_id_rd then
|
1777 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET7;
|
1778 |
|
|
else
|
1779 |
|
|
packet_handler_next_state <= COMPLETE;
|
1780 |
|
|
end if;
|
1781 |
|
|
when PARSE_DHCP_PACKET7 =>
|
1782 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET8;
|
1783 |
|
|
when PARSE_DHCP_PACKET8 =>
|
1784 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET9;
|
1785 |
|
|
when PARSE_DHCP_PACKET9 =>
|
1786 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET10;
|
1787 |
|
|
when PARSE_DHCP_PACKET10 =>
|
1788 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET11;
|
1789 |
|
|
when PARSE_DHCP_PACKET11 =>
|
1790 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET12;
|
1791 |
|
|
when PARSE_DHCP_PACKET12 =>
|
1792 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET13;
|
1793 |
|
|
when PARSE_DHCP_PACKET13 =>
|
1794 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET14;
|
1795 |
|
|
when PARSE_DHCP_PACKET14 =>
|
1796 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET15;
|
1797 |
|
|
when PARSE_DHCP_PACKET15 =>
|
1798 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET16;
|
1799 |
|
|
when PARSE_DHCP_PACKET16 =>
|
1800 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET17;
|
1801 |
|
|
when PARSE_DHCP_PACKET17 =>
|
1802 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET18;
|
1803 |
|
|
when PARSE_DHCP_PACKET18 =>
|
1804 |
|
|
if C_dhcp_magic_cookie = dhcp_magic_cookie then
|
1805 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET19;
|
1806 |
|
|
else
|
1807 |
|
|
packet_handler_next_state <= COMPLETE;
|
1808 |
|
|
end if;
|
1809 |
|
|
|
1810 |
|
|
when PARSE_DHCP_PACKET19 =>
|
1811 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET20;
|
1812 |
|
|
when PARSE_DHCP_PACKET20 =>
|
1813 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET21;
|
1814 |
|
|
when PARSE_DHCP_PACKET21 =>
|
1815 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET22;
|
1816 |
|
|
when PARSE_DHCP_PACKET22 =>
|
1817 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET23;
|
1818 |
|
|
when PARSE_DHCP_PACKET23 =>
|
1819 |
|
|
if dhcp_option = X"35" and dhcp_option_length = X"01" then
|
1820 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET24;
|
1821 |
|
|
elsif dhcp_option = X"FF" then
|
1822 |
|
|
packet_handler_next_state <= COMPLETE;
|
1823 |
|
|
elsif RESIZE(dhcp_option_addr, 16) > total_packet_length then
|
1824 |
|
|
packet_handler_next_state <= COMPLETE;
|
1825 |
|
|
else
|
1826 |
|
|
packet_handler_next_state <= PARSE_DHCP_PACKET19;
|
1827 |
|
|
end if;
|
1828 |
|
|
when PARSE_DHCP_PACKET24 =>
|
1829 |
|
|
if dhcp_message_type = X"02" then -- dhcp offer
|
1830 |
|
|
packet_handler_next_state <= CHECK_OFFER_EXPECTED;
|
1831 |
|
|
elsif dhcp_message_type = X"04" then -- dhcp decline
|
1832 |
|
|
packet_handler_next_state <= COMPLETE;
|
1833 |
|
|
elsif dhcp_message_type = X"05" then -- dhcp acknowledge
|
1834 |
|
|
packet_handler_next_state <= HANDLE_DHCP_ACK0;
|
1835 |
|
|
elsif dhcp_message_type = X"06" then -- dhcp negative acknowledge
|
1836 |
|
|
packet_handler_next_state <= COMPLETE;
|
1837 |
|
|
elsif dhcp_message_type = X"07" then -- dhcp release
|
1838 |
|
|
packet_handler_next_state <= COMPLETE;
|
1839 |
|
|
else
|
1840 |
|
|
packet_handler_next_state <= COMPLETE;
|
1841 |
|
|
end if;
|
1842 |
|
|
|
1843 |
|
|
when CHECK_OFFER_EXPECTED =>
|
1844 |
|
|
if expecting_dhcp_offer = '1' then
|
1845 |
|
|
packet_handler_next_state <= TRIGGER_DHCP_REQUEST;
|
1846 |
|
|
else
|
1847 |
|
|
packet_handler_next_state <= COMPLETE;
|
1848 |
|
|
end if;
|
1849 |
|
|
when TRIGGER_DHCP_REQUEST =>
|
1850 |
|
|
if tx_packet_config_cmplt = '1' then
|
1851 |
|
|
packet_handler_next_state <= COMPLETE;
|
1852 |
|
|
end if;
|
1853 |
|
|
|
1854 |
|
|
when HANDLE_DHCP_ACK0 =>
|
1855 |
|
|
if expecting_dhcp_ack = '1' then
|
1856 |
|
|
packet_handler_next_state <= HANDLE_DHCP_ACK1;
|
1857 |
|
|
else
|
1858 |
|
|
packet_handler_next_state <= COMPLETE;
|
1859 |
|
|
end if;
|
1860 |
|
|
when HANDLE_DHCP_ACK1 =>
|
1861 |
|
|
packet_handler_next_state <= HANDLE_DHCP_ACK2;
|
1862 |
|
|
when HANDLE_DHCP_ACK2 =>
|
1863 |
|
|
packet_handler_next_state <= HANDLE_DHCP_ACK3;
|
1864 |
|
|
when HANDLE_DHCP_ACK3 =>
|
1865 |
|
|
packet_handler_next_state <= HANDLE_DHCP_ACK4;
|
1866 |
|
|
when HANDLE_DHCP_ACK4 =>
|
1867 |
|
|
packet_handler_next_state <= HANDLE_DHCP_ACK5;
|
1868 |
|
|
when HANDLE_DHCP_ACK5 =>
|
1869 |
|
|
packet_handler_next_state <= HANDLE_DHCP_ACK6;
|
1870 |
|
|
when HANDLE_DHCP_ACK6 =>
|
1871 |
|
|
packet_handler_next_state <= HANDLE_DHCP_ACK7;
|
1872 |
|
|
when HANDLE_DHCP_ACK7 =>
|
1873 |
|
|
packet_handler_next_state <= HANDLE_DHCP_ACK8;
|
1874 |
|
|
when HANDLE_DHCP_ACK8 =>
|
1875 |
|
|
packet_handler_next_state <= COMPLETE;
|
1876 |
|
|
|
1877 |
|
|
when PARSE_TCP_PACKET0 =>
|
1878 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET1;
|
1879 |
|
|
when PARSE_TCP_PACKET1 =>
|
1880 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET2;
|
1881 |
|
|
when PARSE_TCP_PACKET2 =>
|
1882 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET3;
|
1883 |
|
|
when PARSE_TCP_PACKET3 =>
|
1884 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET4;
|
1885 |
|
|
when PARSE_TCP_PACKET4 =>
|
1886 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET5;
|
1887 |
|
|
when PARSE_TCP_PACKET5 =>
|
1888 |
|
|
if rx_tcp_source_port = client_port then
|
1889 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET6;
|
1890 |
|
|
else
|
1891 |
|
|
packet_handler_next_state <= COMPLETE;
|
1892 |
|
|
end if;
|
1893 |
|
|
when PARSE_TCP_PACKET6 =>
|
1894 |
|
|
if rx_tcp_dest_port = listen_port then
|
1895 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET7;
|
1896 |
|
|
else
|
1897 |
|
|
packet_handler_next_state <= COMPLETE;
|
1898 |
|
|
end if;
|
1899 |
|
|
when PARSE_TCP_PACKET7 =>
|
1900 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET8;
|
1901 |
|
|
when PARSE_TCP_PACKET8 =>
|
1902 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET9;
|
1903 |
|
|
when PARSE_TCP_PACKET9 =>
|
1904 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET10;
|
1905 |
|
|
when PARSE_TCP_PACKET10 =>
|
1906 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET11;
|
1907 |
|
|
when PARSE_TCP_PACKET11 =>
|
1908 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET12;
|
1909 |
|
|
when PARSE_TCP_PACKET12 =>
|
1910 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET13;
|
1911 |
|
|
when PARSE_TCP_PACKET13 =>
|
1912 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET14;
|
1913 |
|
|
when PARSE_TCP_PACKET14 =>
|
1914 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET15;
|
1915 |
|
|
when PARSE_TCP_PACKET15 =>
|
1916 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET16;
|
1917 |
|
|
when PARSE_TCP_PACKET16 =>
|
1918 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET17;
|
1919 |
|
|
when PARSE_TCP_PACKET17 =>
|
1920 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET18;
|
1921 |
|
|
when PARSE_TCP_PACKET18 =>
|
1922 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET19;
|
1923 |
|
|
when PARSE_TCP_PACKET19 =>
|
1924 |
|
|
if rx_tcp_flags(4 downto 1) = X"1" and tcp_connection_active = '0' then -- SYN PACKET (READ OPTIONS)
|
1925 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET20;
|
1926 |
|
|
else
|
1927 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET25;
|
1928 |
|
|
end if;
|
1929 |
|
|
when PARSE_TCP_PACKET20 =>
|
1930 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET21;
|
1931 |
|
|
when PARSE_TCP_PACKET21 =>
|
1932 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET22;
|
1933 |
|
|
when PARSE_TCP_PACKET22 =>
|
1934 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET23;
|
1935 |
|
|
when PARSE_TCP_PACKET23 =>
|
1936 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET24;
|
1937 |
|
|
when PARSE_TCP_PACKET24 =>
|
1938 |
|
|
if rx_tcp_option = X"03" then
|
1939 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET25;
|
1940 |
|
|
elsif rx_tcp_option = X"01" then
|
1941 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET26;
|
1942 |
|
|
elsif RESIZE(tcp_option_addr, 16) > total_packet_length then
|
1943 |
|
|
packet_handler_next_state <= COMPLETE;
|
1944 |
|
|
else
|
1945 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET27;
|
1946 |
|
|
end if;
|
1947 |
|
|
when PARSE_TCP_PACKET25 =>
|
1948 |
|
|
if rx_tcp_flags(4 downto 1) = X"1" and tcp_connection_active = '0' then
|
1949 |
|
|
packet_handler_next_state <= CHECK_TCP_SYN_PACKET0;
|
1950 |
|
|
elsif rx_tcp_flags(4 downto 1) = X"C" or rx_tcp_flags(4 downto 1) = X"8" then
|
1951 |
|
|
packet_handler_next_state <= CHECK_TCP_PSH_ACK_PACKET0;
|
1952 |
|
|
else
|
1953 |
|
|
packet_handler_next_state <= COMPLETE;
|
1954 |
|
|
end if;
|
1955 |
|
|
when PARSE_TCP_PACKET26 =>
|
1956 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET20;
|
1957 |
|
|
when PARSE_TCP_PACKET27 =>
|
1958 |
|
|
if rx_tcp_option_length = X"00" then
|
1959 |
|
|
packet_handler_next_state <= COMPLETE;
|
1960 |
|
|
else
|
1961 |
|
|
packet_handler_next_state <= PARSE_TCP_PACKET20;
|
1962 |
|
|
end if;
|
1963 |
|
|
when CHECK_TCP_SYN_PACKET0 =>
|
1964 |
|
|
packet_handler_next_state <= CHECK_TCP_SYN_PACKET1;
|
1965 |
|
|
when CHECK_TCP_SYN_PACKET1 =>
|
1966 |
|
|
packet_handler_next_state <= CHECK_TCP_SYN_PACKET2;
|
1967 |
|
|
when CHECK_TCP_SYN_PACKET2 =>
|
1968 |
|
|
packet_handler_next_state <= CHECK_TCP_SYN_PACKET3;
|
1969 |
|
|
when CHECK_TCP_SYN_PACKET3 =>
|
1970 |
|
|
packet_handler_next_state <= CHECK_TCP_SYN_PACKET4;
|
1971 |
|
|
when CHECK_TCP_SYN_PACKET4 =>
|
1972 |
|
|
packet_handler_next_state <= CHECK_TCP_SYN_PACKET5;
|
1973 |
|
|
when CHECK_TCP_SYN_PACKET5 =>
|
1974 |
|
|
packet_handler_next_state <= TRIGGER_TCP_ACK0;
|
1975 |
|
|
|
1976 |
|
|
when CHECK_TCP_PSH_ACK_PACKET0 =>
|
1977 |
|
|
if tcp_sequence_number = unsigned(rx_tcp_ack_number) then
|
1978 |
|
|
packet_handler_next_state <= CHECK_TCP_PSH_ACK_PACKET1;
|
1979 |
|
|
else
|
1980 |
|
|
packet_handler_next_state <= COMPLETE;
|
1981 |
|
|
end if;
|
1982 |
|
|
when CHECK_TCP_PSH_ACK_PACKET1 =>
|
1983 |
|
|
if tcp_acknowledge_number = unsigned(rx_tcp_seq_number) then
|
1984 |
|
|
packet_handler_next_state <= CHECK_TCP_PSH_ACK_PACKET2;
|
1985 |
|
|
else
|
1986 |
|
|
packet_handler_next_state <= RESEND_ACK; -- ACK failed to reach target, resend
|
1987 |
|
|
end if;
|
1988 |
|
|
when CHECK_TCP_PSH_ACK_PACKET2 =>
|
1989 |
|
|
if rx_data_length /= X"0000" then
|
1990 |
|
|
packet_handler_next_state <= CHECK_TCP_PSH_ACK_PACKET3;
|
1991 |
|
|
else
|
1992 |
|
|
packet_handler_next_state <= COMPLETE; -- This was just an ACK
|
1993 |
|
|
end if;
|
1994 |
|
|
when CHECK_TCP_PSH_ACK_PACKET3 =>
|
1995 |
|
|
packet_handler_next_state <= READ_TCP_RX_DATA;
|
1996 |
|
|
|
1997 |
|
|
when READ_TCP_RX_DATA =>
|
1998 |
|
|
if RESIZE(rx_packet_ram_rd_addr, 16) > total_packet_length then
|
1999 |
|
|
packet_handler_next_state <= COMPLETE;
|
2000 |
|
|
end if;
|
2001 |
|
|
|
2002 |
|
|
when TRIGGER_TCP_ACK0 =>
|
2003 |
|
|
packet_handler_next_state <= TRIGGER_TCP_ACK1;
|
2004 |
|
|
when TRIGGER_TCP_ACK1 =>
|
2005 |
|
|
if window_size > X"136" then
|
2006 |
|
|
packet_handler_next_state <= TRIGGER_TCP_ACK2;
|
2007 |
|
|
end if;
|
2008 |
|
|
when TRIGGER_TCP_ACK2 =>
|
2009 |
|
|
packet_handler_next_state <= TRIGGER_TCP_ACK3;
|
2010 |
|
|
when TRIGGER_TCP_ACK3 =>
|
2011 |
|
|
if tx_packet_state = INIT_TCP_PACKET_METADATA then
|
2012 |
|
|
packet_handler_next_state <= COMPLETE;
|
2013 |
|
|
end if;
|
2014 |
|
|
|
2015 |
|
|
when RESEND_ACK =>
|
2016 |
|
|
packet_handler_next_state <= COMPLETE;
|
2017 |
|
|
|
2018 |
|
|
when CHECK_IF_DATA_TO_SEND =>
|
2019 |
|
|
if tcp_wr_data_count /= X"000" then
|
2020 |
|
|
packet_handler_next_state <= TRIGGER_TCP_PSH_ACK0;
|
2021 |
|
|
else
|
2022 |
|
|
packet_handler_next_state <= COMPLETE;
|
2023 |
|
|
end if;
|
2024 |
|
|
when TRIGGER_TCP_PSH_ACK0 =>
|
2025 |
|
|
packet_handler_next_state <= TRIGGER_TCP_PSH_ACK1;
|
2026 |
|
|
when TRIGGER_TCP_PSH_ACK1 =>
|
2027 |
|
|
if rx_tcp_window_size_shifted(31 downto 12) = X"00000" then
|
2028 |
|
|
packet_handler_next_state <= CHECK_TCP_WINDOW_SIZE;
|
2029 |
|
|
else
|
2030 |
|
|
packet_handler_next_state <= TRIGGER_TCP_PSH_ACK2;
|
2031 |
|
|
end if;
|
2032 |
|
|
when CHECK_TCP_WINDOW_SIZE =>
|
2033 |
|
|
if tx_bytes_to_send > unsigned(rx_tcp_window_size_shifted(11 downto 0)) then -- server is not ready to receive data yet
|
2034 |
|
|
packet_handler_next_state <= RX_TCP_WINDOW_TOO_SMALL;
|
2035 |
|
|
else
|
2036 |
|
|
packet_handler_next_state <= TRIGGER_TCP_PSH_ACK2;
|
2037 |
|
|
end if;
|
2038 |
|
|
when TRIGGER_TCP_PSH_ACK2 =>
|
2039 |
|
|
if tx_packet_state = SET_CHECKSUM_LENGTH_TX_PACKET_LENGTH0 then -- wait until packet is formed before incrementing sequence number
|
2040 |
|
|
packet_handler_next_state <= TRIGGER_TCP_PSH_ACK3;
|
2041 |
|
|
end if;
|
2042 |
|
|
when TRIGGER_TCP_PSH_ACK3 =>
|
2043 |
|
|
packet_handler_next_state <= COMPLETE;
|
2044 |
|
|
|
2045 |
|
|
when RX_TCP_WINDOW_TOO_SMALL =>
|
2046 |
|
|
packet_handler_next_state <= IDLE;
|
2047 |
|
|
when COMPLETE =>
|
2048 |
|
|
packet_handler_next_state <= IDLE;
|
2049 |
|
|
|
2050 |
|
|
end case;
|
2051 |
|
|
end process;
|
2052 |
|
|
|
2053 |
|
|
ACK_TIMER_PROC: process(CLK_IN)
|
2054 |
|
|
begin
|
2055 |
|
|
if rising_edge(CLK_IN) then
|
2056 |
|
|
if packet_handler_state = CHECK_TCP_PSH_ACK_PACKET3 then
|
2057 |
|
|
ack_countdown <= C_250us;
|
2058 |
|
|
elsif ack_countdown /= X"0000" then
|
2059 |
|
|
ack_countdown <= ack_countdown - 1;
|
2060 |
|
|
end if;
|
2061 |
|
|
if ack_countdown = X"0001" then
|
2062 |
|
|
ack_required <= '1';
|
2063 |
|
|
elsif trigger_fin_ack = '1' then
|
2064 |
|
|
ack_required <= '1';
|
2065 |
|
|
elsif packet_handler_state = TRIGGER_TCP_ACK0 then
|
2066 |
|
|
ack_required <= '0';
|
2067 |
|
|
end if;
|
2068 |
|
|
if packet_handler_state = RESEND_ACK then
|
2069 |
|
|
resend_ack_packet <= '1';
|
2070 |
|
|
elsif eth_state = RESEND_ACK_IN_BUFFER then
|
2071 |
|
|
resend_ack_packet <= '0';
|
2072 |
|
|
end if;
|
2073 |
|
|
if packet_handler_state = RX_TCP_WINDOW_TOO_SMALL then
|
2074 |
|
|
wait_for_tcp_window_size_update <= '1';
|
2075 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET25 then
|
2076 |
|
|
wait_for_tcp_window_size_update <= '0';
|
2077 |
|
|
end if;
|
2078 |
|
|
end if;
|
2079 |
|
|
end process;
|
2080 |
|
|
|
2081 |
|
|
RX_PACKET_RD_ADDR: process(CLK_IN)
|
2082 |
|
|
begin
|
2083 |
|
|
if rising_edge(CLK_IN) then
|
2084 |
|
|
if packet_handler_state = PARSE_SOURCE_MAC0 then
|
2085 |
|
|
rx_packet_ram_rd_addr <= "000"&X"0A";
|
2086 |
|
|
elsif packet_handler_state = PARSE_PACKET_TYPE0 then
|
2087 |
|
|
rx_packet_ram_rd_addr <= "000"&X"10";
|
2088 |
|
|
elsif packet_handler_state = HANDLE_ARP_REQUEST0 then
|
2089 |
|
|
rx_packet_ram_rd_addr <= "000"&X"2A";
|
2090 |
|
|
elsif packet_handler_state = HANDLE_ARP_REQUEST7 then
|
2091 |
|
|
rx_packet_ram_rd_addr <= "000"&X"20";
|
2092 |
|
|
elsif packet_handler_state = HANDLE_IP_PACKET0 then
|
2093 |
|
|
rx_packet_ram_rd_addr <= "000"&X"12";
|
2094 |
|
|
elsif packet_handler_state = HANDLE_IP_PACKET1 then
|
2095 |
|
|
rx_packet_ram_rd_addr <= "000"&X"1B";
|
2096 |
|
|
elsif packet_handler_state = HANDLE_IP_PACKET2 then
|
2097 |
|
|
rx_packet_ram_rd_addr <= "000"&X"22";
|
2098 |
|
|
elsif packet_handler_state = HANDLE_IP_PACKET6 then
|
2099 |
|
|
rx_packet_ram_rd_addr <= "000"&X"14";
|
2100 |
|
|
elsif packet_handler_state = PARSE_UDP_PACKET0 then
|
2101 |
|
|
rx_packet_ram_rd_addr <= "000"&X"26";
|
2102 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET0 then
|
2103 |
|
|
rx_packet_ram_rd_addr <= "000"&X"32";
|
2104 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET4 then
|
2105 |
|
|
rx_packet_ram_rd_addr <= "000"&X"3E";
|
2106 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET12 then
|
2107 |
|
|
rx_packet_ram_rd_addr <= "001"&X"1A";
|
2108 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET19 then
|
2109 |
|
|
rx_packet_ram_rd_addr <= dhcp_option_addr;
|
2110 |
|
|
elsif packet_handler_state = HANDLE_ARP_PACKET0 then
|
2111 |
|
|
rx_packet_ram_rd_addr <= "000"&X"19";
|
2112 |
|
|
elsif packet_handler_state = HANDLE_ARP_REPLY0 then
|
2113 |
|
|
rx_packet_ram_rd_addr <= "000"&X"1A";
|
2114 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET0 then
|
2115 |
|
|
rx_packet_ram_rd_addr <= next_protocol_start_addr;
|
2116 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET20 then
|
2117 |
|
|
rx_packet_ram_rd_addr <= tcp_option_addr;
|
2118 |
|
|
elsif packet_handler_state = CHECK_TCP_PSH_ACK_PACKET1 then
|
2119 |
|
|
rx_packet_ram_rd_addr <= rx_data_start_addr;
|
2120 |
|
|
elsif packet_handler_state = HANDLE_DHCP_ACK1 then
|
2121 |
|
|
rx_packet_ram_rd_addr <= "000"&X"0A";
|
2122 |
|
|
else
|
2123 |
|
|
rx_packet_ram_rd_addr <= rx_packet_ram_rd_addr + 1;
|
2124 |
|
|
end if;
|
2125 |
|
|
if packet_handler_state = HANDLE_ARP_PACKET2 then
|
2126 |
|
|
arp_opcode <= rx_packet_rd_data;
|
2127 |
|
|
end if;
|
2128 |
|
|
if packet_handler_state = HANDLE_ARP_REQUEST9 then
|
2129 |
|
|
arp_source_ip_addr(31 downto 24) <= rx_packet_rd_data;
|
2130 |
|
|
elsif packet_handler_state = HANDLE_ARP_REQUEST10 then
|
2131 |
|
|
arp_source_ip_addr(23 downto 16) <= rx_packet_rd_data;
|
2132 |
|
|
elsif packet_handler_state = HANDLE_ARP_REQUEST11 then
|
2133 |
|
|
arp_source_ip_addr(15 downto 8) <= rx_packet_rd_data;
|
2134 |
|
|
elsif packet_handler_state = HANDLE_ARP_REQUEST12 then
|
2135 |
|
|
arp_source_ip_addr(7 downto 0) <= rx_packet_rd_data;
|
2136 |
|
|
end if;
|
2137 |
|
|
if packet_handler_state = HANDLE_ARP_REQUEST2 then
|
2138 |
|
|
arp_target_ip_addr(31 downto 24) <= rx_packet_rd_data;
|
2139 |
|
|
elsif packet_handler_state = HANDLE_ARP_REQUEST3 then
|
2140 |
|
|
arp_target_ip_addr(23 downto 16) <= rx_packet_rd_data;
|
2141 |
|
|
elsif packet_handler_state = HANDLE_ARP_REQUEST4 then
|
2142 |
|
|
arp_target_ip_addr(15 downto 8) <= rx_packet_rd_data;
|
2143 |
|
|
elsif packet_handler_state = HANDLE_ARP_REQUEST5 then
|
2144 |
|
|
arp_target_ip_addr(7 downto 0) <= rx_packet_rd_data;
|
2145 |
|
|
end if;
|
2146 |
|
|
if packet_handler_state = PARSE_SOURCE_MAC2 then
|
2147 |
|
|
rx_packet_source_mac(47 downto 40) <= rx_packet_rd_data;
|
2148 |
|
|
elsif packet_handler_state = PARSE_SOURCE_MAC3 then
|
2149 |
|
|
rx_packet_source_mac(39 downto 32) <= rx_packet_rd_data;
|
2150 |
|
|
elsif packet_handler_state = PARSE_SOURCE_MAC4 then
|
2151 |
|
|
rx_packet_source_mac(31 downto 24) <= rx_packet_rd_data;
|
2152 |
|
|
elsif packet_handler_state = PARSE_SOURCE_MAC5 then
|
2153 |
|
|
rx_packet_source_mac(23 downto 16) <= rx_packet_rd_data;
|
2154 |
|
|
elsif packet_handler_state = PARSE_SOURCE_MAC6 then
|
2155 |
|
|
rx_packet_source_mac(15 downto 8) <= rx_packet_rd_data;
|
2156 |
|
|
elsif packet_handler_state = PARSE_SOURCE_MAC7 then
|
2157 |
|
|
rx_packet_source_mac(7 downto 0) <= rx_packet_rd_data;
|
2158 |
|
|
end if;
|
2159 |
|
|
if packet_handler_state = PARSE_PACKET_TYPE2 then
|
2160 |
|
|
rx_packet_type(15 downto 8) <= rx_packet_rd_data;
|
2161 |
|
|
elsif packet_handler_state = PARSE_PACKET_TYPE3 then
|
2162 |
|
|
rx_packet_type(7 downto 0) <= rx_packet_rd_data;
|
2163 |
|
|
end if;
|
2164 |
|
|
if packet_handler_state = HANDLE_IP_PACKET2 then
|
2165 |
|
|
ip_packet_version <= rx_packet_rd_data(7 downto 4);
|
2166 |
|
|
end if;
|
2167 |
|
|
if packet_handler_state = HANDLE_IP_PACKET3 then
|
2168 |
|
|
ip_packet_protocol <= rx_packet_rd_data;
|
2169 |
|
|
end if;
|
2170 |
|
|
if packet_handler_state = HANDLE_IP_PACKET2 then
|
2171 |
|
|
ip_packet_header_length(3 downto 0) <= rx_packet_rd_data(3 downto 0);
|
2172 |
|
|
ip_packet_header_length(7 downto 4) <= X"0";
|
2173 |
|
|
elsif packet_handler_state = HANDLE_IP_PACKET3 then
|
2174 |
|
|
ip_packet_header_length <= ip_packet_header_length(5 downto 0) & "00";
|
2175 |
|
|
end if;
|
2176 |
|
|
if packet_handler_state = HANDLE_IP_PACKET4 then
|
2177 |
|
|
next_protocol_start_addr <= RESIZE(unsigned(ip_packet_header_length), 11) + "00000010010"; -- src/dest mac + protocol + status reg (4 bytes)
|
2178 |
|
|
end if;
|
2179 |
|
|
if packet_handler_state = HANDLE_IP_PACKET4 then
|
2180 |
|
|
ip_packet_destination_ip(31 downto 24) <= rx_packet_rd_data;
|
2181 |
|
|
elsif packet_handler_state = HANDLE_IP_PACKET5 then
|
2182 |
|
|
ip_packet_destination_ip(23 downto 16) <= rx_packet_rd_data;
|
2183 |
|
|
elsif packet_handler_state = HANDLE_IP_PACKET6 then
|
2184 |
|
|
ip_packet_destination_ip(15 downto 8) <= rx_packet_rd_data;
|
2185 |
|
|
elsif packet_handler_state = HANDLE_IP_PACKET7 then
|
2186 |
|
|
ip_packet_destination_ip(7 downto 0) <= rx_packet_rd_data;
|
2187 |
|
|
end if;
|
2188 |
|
|
if packet_handler_state = HANDLE_IP_PACKET8 then
|
2189 |
|
|
ip_packet_length(15 downto 8) <= rx_packet_rd_data;
|
2190 |
|
|
elsif packet_handler_state = HANDLE_IP_PACKET9 then
|
2191 |
|
|
ip_packet_length(7 downto 0) <= rx_packet_rd_data;
|
2192 |
|
|
end if;
|
2193 |
|
|
if packet_handler_state = HANDLE_IP_PACKET10 then -- TODO Rename ip_packet_length ?
|
2194 |
|
|
total_packet_length <= unsigned(ip_packet_length) + X"0012"; -- src/dest mac + protocol + status reg (4 bytes)
|
2195 |
|
|
end if;
|
2196 |
|
|
if packet_handler_state = PARSE_UDP_PACKET2 then
|
2197 |
|
|
udp_source_port(15 downto 8) <= rx_packet_rd_data;
|
2198 |
|
|
elsif packet_handler_state = PARSE_UDP_PACKET3 then
|
2199 |
|
|
udp_source_port(7 downto 0) <= rx_packet_rd_data;
|
2200 |
|
|
end if;
|
2201 |
|
|
if packet_handler_state = PARSE_UDP_PACKET4 then
|
2202 |
|
|
udp_dest_port(15 downto 8) <= rx_packet_rd_data;
|
2203 |
|
|
elsif packet_handler_state = PARSE_UDP_PACKET5 then
|
2204 |
|
|
udp_dest_port(7 downto 0) <= rx_packet_rd_data;
|
2205 |
|
|
end if;
|
2206 |
|
|
if packet_handler_state = PARSE_DHCP_PACKET2 then
|
2207 |
|
|
transaction_id_rd(31 downto 24) <= rx_packet_rd_data;
|
2208 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET3 then
|
2209 |
|
|
transaction_id_rd(23 downto 16) <= rx_packet_rd_data;
|
2210 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET4 then
|
2211 |
|
|
transaction_id_rd(15 downto 8) <= rx_packet_rd_data;
|
2212 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET5 then
|
2213 |
|
|
transaction_id_rd(7 downto 0) <= rx_packet_rd_data;
|
2214 |
|
|
end if;
|
2215 |
|
|
if packet_handler_state = PARSE_DHCP_PACKET6 then
|
2216 |
|
|
dhcp_your_ip_addr(31 downto 24) <= rx_packet_rd_data;
|
2217 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET7 then
|
2218 |
|
|
dhcp_your_ip_addr(23 downto 16) <= rx_packet_rd_data;
|
2219 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET8 then
|
2220 |
|
|
dhcp_your_ip_addr(15 downto 8) <= rx_packet_rd_data;
|
2221 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET9 then
|
2222 |
|
|
dhcp_your_ip_addr(7 downto 0) <= rx_packet_rd_data;
|
2223 |
|
|
end if;
|
2224 |
|
|
if packet_handler_state = PARSE_DHCP_PACKET10 then
|
2225 |
|
|
dhcp_server_ip_addr(31 downto 24) <= rx_packet_rd_data;
|
2226 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET11 then
|
2227 |
|
|
dhcp_server_ip_addr(23 downto 16) <= rx_packet_rd_data;
|
2228 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET12 then
|
2229 |
|
|
dhcp_server_ip_addr(15 downto 8) <= rx_packet_rd_data;
|
2230 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET13 then
|
2231 |
|
|
dhcp_server_ip_addr(7 downto 0) <= rx_packet_rd_data;
|
2232 |
|
|
end if;
|
2233 |
|
|
if packet_handler_state = PARSE_DHCP_PACKET14 then
|
2234 |
|
|
dhcp_magic_cookie(31 downto 24) <= rx_packet_rd_data;
|
2235 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET15 then
|
2236 |
|
|
dhcp_magic_cookie(23 downto 16) <= rx_packet_rd_data;
|
2237 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET16 then
|
2238 |
|
|
dhcp_magic_cookie(15 downto 8) <= rx_packet_rd_data;
|
2239 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET17 then
|
2240 |
|
|
dhcp_magic_cookie(7 downto 0) <= rx_packet_rd_data;
|
2241 |
|
|
end if;
|
2242 |
|
|
if packet_handler_state = PARSE_DHCP_PACKET21 then
|
2243 |
|
|
dhcp_option <= rx_packet_rd_data;
|
2244 |
|
|
end if;
|
2245 |
|
|
if packet_handler_state = PARSE_DHCP_PACKET22 then
|
2246 |
|
|
dhcp_option_length <= rx_packet_rd_data;
|
2247 |
|
|
end if;
|
2248 |
|
|
if packet_handler_state = PARSE_DHCP_PACKET18 then
|
2249 |
|
|
dhcp_option_addr <= "001"&X"1E";
|
2250 |
|
|
elsif packet_handler_state = PARSE_DHCP_PACKET23 then
|
2251 |
|
|
dhcp_option_addr <= dhcp_option_addr + RESIZE(unsigned(dhcp_option_length), 11);
|
2252 |
|
|
end if;
|
2253 |
|
|
if packet_handler_state = PARSE_DHCP_PACKET23 then
|
2254 |
|
|
dhcp_message_type <= rx_packet_rd_data;
|
2255 |
|
|
end if;
|
2256 |
|
|
if (packet_handler_state = CHECK_TCP_SYN_PACKET0) then
|
2257 |
|
|
client_mac_addr(47 downto 40) <= rx_packet_source_mac(47 downto 40);
|
2258 |
|
|
elsif (packet_handler_state = CHECK_TCP_SYN_PACKET1) then
|
2259 |
|
|
client_mac_addr(39 downto 32) <= rx_packet_source_mac(39 downto 32);
|
2260 |
|
|
elsif (packet_handler_state = CHECK_TCP_SYN_PACKET2) then
|
2261 |
|
|
client_mac_addr(31 downto 24) <= rx_packet_source_mac(31 downto 24);
|
2262 |
|
|
elsif (packet_handler_state = CHECK_TCP_SYN_PACKET3) then
|
2263 |
|
|
client_mac_addr(23 downto 16) <= rx_packet_source_mac(23 downto 16);
|
2264 |
|
|
elsif (packet_handler_state = CHECK_TCP_SYN_PACKET4) then
|
2265 |
|
|
client_mac_addr(15 downto 8) <= rx_packet_source_mac(15 downto 8);
|
2266 |
|
|
elsif (packet_handler_state = CHECK_TCP_SYN_PACKET5) then
|
2267 |
|
|
client_mac_addr(7 downto 0) <= rx_packet_source_mac(7 downto 0);
|
2268 |
|
|
end if;
|
2269 |
|
|
if packet_handler_state = PARSE_TCP_PACKET2 then
|
2270 |
|
|
rx_tcp_source_port(15 downto 8) <= rx_packet_rd_data;
|
2271 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET3 then
|
2272 |
|
|
rx_tcp_source_port(7 downto 0) <= rx_packet_rd_data;
|
2273 |
|
|
end if;
|
2274 |
|
|
if packet_handler_state = PARSE_TCP_PACKET4 then
|
2275 |
|
|
rx_tcp_dest_port(15 downto 8) <= rx_packet_rd_data;
|
2276 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET5 then
|
2277 |
|
|
rx_tcp_dest_port(7 downto 0) <= rx_packet_rd_data;
|
2278 |
|
|
end if;
|
2279 |
|
|
if packet_handler_state = PARSE_TCP_PACKET6 then
|
2280 |
|
|
rx_tcp_seq_number(31 downto 24) <= rx_packet_rd_data;
|
2281 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET7 then
|
2282 |
|
|
rx_tcp_seq_number(23 downto 16) <= rx_packet_rd_data;
|
2283 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET8 then
|
2284 |
|
|
rx_tcp_seq_number(15 downto 8) <= rx_packet_rd_data;
|
2285 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET9 then
|
2286 |
|
|
rx_tcp_seq_number(7 downto 0) <= rx_packet_rd_data;
|
2287 |
|
|
end if;
|
2288 |
|
|
if packet_handler_state = PARSE_TCP_PACKET10 then
|
2289 |
|
|
rx_tcp_ack_number(31 downto 24) <= rx_packet_rd_data;
|
2290 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET11 then
|
2291 |
|
|
rx_tcp_ack_number(23 downto 16) <= rx_packet_rd_data;
|
2292 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET12 then
|
2293 |
|
|
rx_tcp_ack_number(15 downto 8) <= rx_packet_rd_data;
|
2294 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET13 then
|
2295 |
|
|
rx_tcp_ack_number(7 downto 0) <= rx_packet_rd_data;
|
2296 |
|
|
end if;
|
2297 |
|
|
if packet_handler_state = PARSE_TCP_PACKET14 then
|
2298 |
|
|
rx_tcp_header_length <= "00"&rx_packet_rd_data(7 downto 2);
|
2299 |
|
|
end if;
|
2300 |
|
|
if packet_handler_state = PARSE_TCP_PACKET15 then
|
2301 |
|
|
rx_tcp_flags <= rx_packet_rd_data;
|
2302 |
|
|
end if;
|
2303 |
|
|
if packet_handler_state = PARSE_TCP_PACKET14 then
|
2304 |
|
|
rx_data_length <= unsigned(ip_packet_length);
|
2305 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET15 then
|
2306 |
|
|
rx_data_length <= rx_data_length - RESIZE(unsigned(rx_tcp_header_length), 16);
|
2307 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET16 then
|
2308 |
|
|
rx_data_length <= rx_data_length - RESIZE(unsigned(ip_packet_header_length), 16);
|
2309 |
|
|
end if;
|
2310 |
|
|
if packet_handler_state = PARSE_TCP_PACKET15 then
|
2311 |
|
|
rx_data_start_addr <= next_protocol_start_addr;
|
2312 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET16 then
|
2313 |
|
|
rx_data_start_addr <= rx_data_start_addr + RESIZE(unsigned(rx_tcp_header_length), 11);
|
2314 |
|
|
end if;
|
2315 |
|
|
if packet_handler_state = PARSE_TCP_PACKET16 then
|
2316 |
|
|
rx_tcp_window_size(15 downto 8) <= rx_packet_rd_data;
|
2317 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET17 then
|
2318 |
|
|
rx_tcp_window_size(7 downto 0) <= rx_packet_rd_data;
|
2319 |
|
|
end if;
|
2320 |
|
|
if packet_handler_state = PARSE_TCP_PACKET18 then
|
2321 |
|
|
rx_tcp_checksum(15 downto 8) <= rx_packet_rd_data;
|
2322 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET19 then
|
2323 |
|
|
rx_tcp_checksum(7 downto 0) <= rx_packet_rd_data;
|
2324 |
|
|
end if;
|
2325 |
|
|
if packet_handler_state = PARSE_TCP_PACKET19 then
|
2326 |
|
|
tcp_option_addr <= rx_packet_ram_rd_addr + "00000000010"; -- skip 2 blanks after checksum
|
2327 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET26 then
|
2328 |
|
|
tcp_option_addr <= tcp_option_addr + 1;
|
2329 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET27 then
|
2330 |
|
|
tcp_option_addr <= tcp_option_addr + RESIZE(rx_tcp_option_length, 11);
|
2331 |
|
|
end if;
|
2332 |
|
|
if packet_handler_state = PARSE_TCP_PACKET22 then
|
2333 |
|
|
rx_tcp_option <= rx_packet_rd_data;
|
2334 |
|
|
end if;
|
2335 |
|
|
if packet_handler_state = PARSE_TCP_PACKET23 then
|
2336 |
|
|
rx_tcp_option_length <= unsigned(rx_packet_rd_data);
|
2337 |
|
|
end if;
|
2338 |
|
|
if packet_handler_state = PARSE_TCP_PACKET24 then
|
2339 |
|
|
rx_tcp_window_shift <= rx_packet_rd_data(3 downto 0);
|
2340 |
|
|
end if;
|
2341 |
|
|
end if;
|
2342 |
|
|
end process;
|
2343 |
|
|
|
2344 |
|
|
-- TODO Could disable window shift via linux kernel..?
|
2345 |
|
|
with rx_tcp_window_shift select
|
2346 |
|
|
rx_tcp_window_size_shifted <= "0000000000000000"&rx_tcp_window_size when X"0",
|
2347 |
|
|
"000000000000000"&rx_tcp_window_size&"0" when X"1",
|
2348 |
|
|
"00000000000000"&rx_tcp_window_size&"00" when X"2",
|
2349 |
|
|
"0000000000000"&rx_tcp_window_size&"000" when X"3",
|
2350 |
|
|
"000000000000"&rx_tcp_window_size&"0000" when X"4",
|
2351 |
|
|
"00000000000"&rx_tcp_window_size&"00000" when X"5",
|
2352 |
|
|
"0000000000"&rx_tcp_window_size&"000000" when X"6",
|
2353 |
|
|
"000000000"&rx_tcp_window_size&"0000000" when X"7",
|
2354 |
|
|
"00000000"&rx_tcp_window_size&"00000000" when X"8",
|
2355 |
|
|
"0000000"&rx_tcp_window_size&"000000000" when X"9",
|
2356 |
|
|
"000000"&rx_tcp_window_size&"0000000000" when X"A",
|
2357 |
|
|
"00000"&rx_tcp_window_size&"00000000000" when X"B",
|
2358 |
|
|
"0000"&rx_tcp_window_size&"000000000000" when X"C",
|
2359 |
|
|
"000"&rx_tcp_window_size&"0000000000000" when X"D",
|
2360 |
|
|
"00"&rx_tcp_window_size&"00000000000000" when X"E",
|
2361 |
|
|
"0"&rx_tcp_window_size&"000000000000000" when others;
|
2362 |
|
|
|
2363 |
|
|
DHCP_PROC: process(CLK_IN)
|
2364 |
|
|
begin
|
2365 |
|
|
if rising_edge(CLK_IN) then
|
2366 |
|
|
if packet_handler_state = HANDLE_DHCP_ACK1 then
|
2367 |
|
|
ip_addr <= dhcp_your_ip_addr;
|
2368 |
|
|
client_ip_addr <= dhcp_server_ip_addr;
|
2369 |
|
|
end if;
|
2370 |
|
|
if tx_packet_state = INIT_DHCP_DISCOVER_METADATA then
|
2371 |
|
|
expecting_dhcp_offer <= '1';
|
2372 |
|
|
elsif tx_packet_state = INIT_DHCP_REQUEST_METADATA then
|
2373 |
|
|
expecting_dhcp_offer <= '0';
|
2374 |
|
|
elsif tx_packet_state = CANCEL_DHCP_CONNECT_ST then
|
2375 |
|
|
expecting_dhcp_offer <= '0';
|
2376 |
|
|
end if;
|
2377 |
|
|
if tx_packet_state = INIT_DHCP_REQUEST_METADATA then
|
2378 |
|
|
expecting_dhcp_ack <= '1';
|
2379 |
|
|
elsif packet_handler_state = HANDLE_DHCP_ACK1 then
|
2380 |
|
|
expecting_dhcp_ack <= '0';
|
2381 |
|
|
elsif tx_packet_state = CANCEL_DHCP_CONNECT_ST then
|
2382 |
|
|
expecting_dhcp_ack <= '0';
|
2383 |
|
|
end if;
|
2384 |
|
|
if eth_state = TRIGGER_DHCP_DISCOVER then
|
2385 |
|
|
dhcp_addr_locked <= '0';
|
2386 |
|
|
elsif packet_handler_state = HANDLE_DHCP_ACK1 then
|
2387 |
|
|
dhcp_addr_locked <= '1';
|
2388 |
|
|
end if;
|
2389 |
|
|
if eth_state = TRIGGER_ARP_REQUEST then
|
2390 |
|
|
expecting_arp_reply <= '1';
|
2391 |
|
|
elsif packet_handler_state = HANDLE_ARP_REPLY1 then
|
2392 |
|
|
expecting_arp_reply <= '0';
|
2393 |
|
|
end if;
|
2394 |
|
|
if packet_handler_state = HANDLE_ARP_REPLY7 then
|
2395 |
|
|
static_addr_locked <= '1';
|
2396 |
|
|
elsif tx_packet_state = INIT_ARP_REQUEST_METADATA then
|
2397 |
|
|
static_addr_locked <= '0';
|
2398 |
|
|
elsif tx_packet_state = CANCEL_DHCP_CONNECT_ST then
|
2399 |
|
|
static_addr_locked <= '0';
|
2400 |
|
|
end if;
|
2401 |
|
|
end if;
|
2402 |
|
|
end process;
|
2403 |
|
|
|
2404 |
|
|
|
2405 |
|
|
--------------------- TX PACKET ------------------------------
|
2406 |
|
|
|
2407 |
|
|
TP_SYNC_PROC: process(CLK_IN)
|
2408 |
|
|
begin
|
2409 |
|
|
if rising_edge(CLK_IN) then
|
2410 |
|
|
tx_packet_state <= tx_packet_next_state;
|
2411 |
|
|
end if;
|
2412 |
|
|
end process;
|
2413 |
|
|
|
2414 |
|
|
TP_NEXT_STATE_DECODE: process (tx_packet_state, send_arp_reply, send_arp_request, send_icmp_reply,
|
2415 |
|
|
send_dhcp_discover, send_dhcp_request, frame_rd_cmplt, send_tcp_ack_packet,
|
2416 |
|
|
cancel_dhcp_connect, close_tcp_connection, cancel_tcp_connection,
|
2417 |
|
|
packet_instruction, checksum_calc_done)
|
2418 |
|
|
begin
|
2419 |
|
|
tx_packet_next_state <= tx_packet_state; --default is to stay in current state
|
2420 |
|
|
case (tx_packet_state) is
|
2421 |
|
|
when IDLE =>
|
2422 |
|
|
if send_arp_reply = '1' then
|
2423 |
|
|
tx_packet_next_state <= INIT_ARP_REPLY_METADATA;
|
2424 |
|
|
elsif send_arp_request = '1' then
|
2425 |
|
|
tx_packet_next_state <= INIT_ARP_REQUEST_METADATA;
|
2426 |
|
|
elsif send_icmp_reply = '1' then
|
2427 |
|
|
tx_packet_next_state <= INIT_ICMP_REPLY_METADATA;
|
2428 |
|
|
elsif send_dhcp_discover = '1' then
|
2429 |
|
|
tx_packet_next_state <= INIT_DHCP_DISCOVER_METADATA;
|
2430 |
|
|
elsif send_dhcp_request = '1' then
|
2431 |
|
|
tx_packet_next_state <= INIT_DHCP_REQUEST_METADATA;
|
2432 |
|
|
elsif send_tcp_ack_packet = '1' then
|
2433 |
|
|
tx_packet_next_state <= INIT_TCP_PACKET_METADATA;
|
2434 |
|
|
elsif cancel_dhcp_connect = '1' then
|
2435 |
|
|
tx_packet_next_state <= CANCEL_DHCP_CONNECT_ST;
|
2436 |
|
|
elsif close_tcp_connection = '1' then
|
2437 |
|
|
tx_packet_next_state <= TCP_CONNECTION_CLOSED;
|
2438 |
|
|
elsif cancel_tcp_connection = '1' then
|
2439 |
|
|
tx_packet_next_state <= CANCEL_TCP_CONNECTION_ST;
|
2440 |
|
|
elsif send_tcp_tx_packet = '1' then
|
2441 |
|
|
tx_packet_next_state <= INIT_TCP_TX_PACKET_METADATA;
|
2442 |
|
|
end if;
|
2443 |
|
|
when CANCEL_DHCP_CONNECT_ST =>
|
2444 |
|
|
tx_packet_next_state <= IDLE;
|
2445 |
|
|
when CANCEL_TCP_CONNECTION_ST =>
|
2446 |
|
|
tx_packet_next_state <= IDLE;
|
2447 |
|
|
when TCP_CONNECTION_CLOSED =>
|
2448 |
|
|
tx_packet_next_state <= IDLE;
|
2449 |
|
|
when INIT_ARP_REPLY_METADATA =>
|
2450 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2451 |
|
|
when INIT_ARP_REQUEST_METADATA =>
|
2452 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2453 |
|
|
when INIT_ICMP_REPLY_METADATA =>
|
2454 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2455 |
|
|
when INIT_DHCP_DISCOVER_METADATA =>
|
2456 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2457 |
|
|
when INIT_DHCP_REQUEST_METADATA =>
|
2458 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2459 |
|
|
when INIT_TCP_PACKET_METADATA =>
|
2460 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2461 |
|
|
when INIT_TCP_TX_PACKET_METADATA =>
|
2462 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2463 |
|
|
when READ_PACKET_BYTE0 =>
|
2464 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE1;
|
2465 |
|
|
when READ_PACKET_BYTE1 =>
|
2466 |
|
|
if frame_rd_cmplt = '1' then
|
2467 |
|
|
tx_packet_next_state <= HANDLE_PACKET_INSTRUCTION0;
|
2468 |
|
|
end if;
|
2469 |
|
|
when HANDLE_PACKET_INSTRUCTION0 =>
|
2470 |
|
|
if packet_instruction = X"FF" then
|
2471 |
|
|
tx_packet_next_state <= COMPLETE;
|
2472 |
|
|
elsif packet_instruction = X"17" then
|
2473 |
|
|
tx_packet_next_state <= SET_RX_PACKET_ADDR_LOWER_BYTE;
|
2474 |
|
|
elsif packet_instruction = X"18" then
|
2475 |
|
|
tx_packet_next_state <= SET_RX_PACKET_ADDR_UPPER_BYTE;
|
2476 |
|
|
elsif packet_instruction = X"20" then
|
2477 |
|
|
tx_packet_next_state <= SET_CHECKSUM_LENGTH_LSB;
|
2478 |
|
|
elsif packet_instruction = X"21" then
|
2479 |
|
|
tx_packet_next_state <= SET_CHECKSUM_LENGTH_MSB;
|
2480 |
|
|
elsif packet_instruction = X"22" then
|
2481 |
|
|
tx_packet_next_state <= SET_CHECKSUM_START_ADDR_LSB;
|
2482 |
|
|
elsif packet_instruction = X"23" then
|
2483 |
|
|
tx_packet_next_state <= SET_CHECKSUM_START_ADDR_MSB;
|
2484 |
|
|
elsif packet_instruction = X"24" then
|
2485 |
|
|
tx_packet_next_state <= SET_CHECKSUM_WR_ADDR_LSB;
|
2486 |
|
|
elsif packet_instruction = X"25" then
|
2487 |
|
|
tx_packet_next_state <= SET_CHECKSUM_WR_ADDR_MSB;
|
2488 |
|
|
elsif packet_instruction = X"26" then
|
2489 |
|
|
tx_packet_next_state <= TRIG_CHECKSUM_CALC;
|
2490 |
|
|
elsif packet_instruction = X"29" then
|
2491 |
|
|
tx_packet_next_state <= MOVE_TX_PACKET_WR_ADDR;
|
2492 |
|
|
elsif packet_instruction = X"2E" then
|
2493 |
|
|
tx_packet_next_state <= SET_NEW_TRANSACTION_ID;
|
2494 |
|
|
elsif packet_instruction = X"50" then
|
2495 |
|
|
tx_packet_next_state <= SET_CHECKSUM_START_VAL_LSB;
|
2496 |
|
|
elsif packet_instruction = X"51" then
|
2497 |
|
|
tx_packet_next_state <= SET_CHECKSUM_START_VAL_MSB;
|
2498 |
|
|
elsif packet_instruction = X"52" then
|
2499 |
|
|
tx_packet_next_state <= TRIGGER_CHECKSUM_LOAD_INITIAL_VALUE;
|
2500 |
|
|
elsif packet_instruction = X"57" then
|
2501 |
|
|
tx_packet_next_state <= INIT_LOAD_TX_PACKET_DATA;
|
2502 |
|
|
elsif packet_instruction = X"58" then
|
2503 |
|
|
tx_packet_next_state <= SET_CHECKSUM_LENGTH_TX_PACKET_LENGTH0;
|
2504 |
|
|
elsif packet_instruction = X"59" then
|
2505 |
|
|
tx_packet_next_state <= SET_CHECKSUM_INITIAL_VALUE_TX_PACKET;
|
2506 |
|
|
else
|
2507 |
|
|
tx_packet_next_state <= HANDLE_PACKET_INSTRUCTION1;
|
2508 |
|
|
end if;
|
2509 |
|
|
when HANDLE_PACKET_INSTRUCTION1 =>
|
2510 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2511 |
|
|
|
2512 |
|
|
when SET_RX_PACKET_ADDR_LOWER_BYTE =>
|
2513 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2514 |
|
|
when SET_RX_PACKET_ADDR_UPPER_BYTE =>
|
2515 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2516 |
|
|
|
2517 |
|
|
when SET_CHECKSUM_LENGTH_LSB =>
|
2518 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2519 |
|
|
when SET_CHECKSUM_LENGTH_MSB =>
|
2520 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2521 |
|
|
|
2522 |
|
|
when SET_CHECKSUM_START_ADDR_LSB =>
|
2523 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2524 |
|
|
when SET_CHECKSUM_START_ADDR_MSB =>
|
2525 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2526 |
|
|
|
2527 |
|
|
when SET_CHECKSUM_WR_ADDR_LSB =>
|
2528 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2529 |
|
|
when SET_CHECKSUM_WR_ADDR_MSB =>
|
2530 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2531 |
|
|
|
2532 |
|
|
when SET_CHECKSUM_LENGTH_TX_PACKET_LENGTH0 =>
|
2533 |
|
|
tx_packet_next_state <= SET_CHECKSUM_LENGTH_TX_PACKET_LENGTH1;
|
2534 |
|
|
when SET_CHECKSUM_LENGTH_TX_PACKET_LENGTH1 =>
|
2535 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2536 |
|
|
|
2537 |
|
|
when TRIG_CHECKSUM_CALC =>
|
2538 |
|
|
tx_packet_next_state <= WAIT_FOR_CHECKSUM_CMPLT;
|
2539 |
|
|
when WAIT_FOR_CHECKSUM_CMPLT =>
|
2540 |
|
|
if checksum_calc_done = '1' then
|
2541 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2542 |
|
|
end if;
|
2543 |
|
|
|
2544 |
|
|
when MOVE_TX_PACKET_WR_ADDR =>
|
2545 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2546 |
|
|
|
2547 |
|
|
when SET_NEW_TRANSACTION_ID =>
|
2548 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2549 |
|
|
|
2550 |
|
|
when SET_CHECKSUM_START_VAL_LSB =>
|
2551 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2552 |
|
|
when SET_CHECKSUM_START_VAL_MSB =>
|
2553 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2554 |
|
|
when TRIGGER_CHECKSUM_LOAD_INITIAL_VALUE =>
|
2555 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2556 |
|
|
when SET_CHECKSUM_INITIAL_VALUE_TX_PACKET =>
|
2557 |
|
|
tx_packet_next_state <= READ_PACKET_BYTE0;
|
2558 |
|
|
|
2559 |
|
|
when INIT_LOAD_TX_PACKET_DATA =>
|
2560 |
|
|
tx_packet_next_state <= LOAD_TX_PACKET_DATA;
|
2561 |
|
|
when LOAD_TX_PACKET_DATA =>
|
2562 |
|
|
if tx_packet_data_counter = X"001" then
|
2563 |
|
|
tx_packet_next_state <= HANDLE_PACKET_INSTRUCTION1;
|
2564 |
|
|
end if;
|
2565 |
|
|
|
2566 |
|
|
when COMPLETE =>
|
2567 |
|
|
tx_packet_next_state <= IDLE;
|
2568 |
|
|
|
2569 |
|
|
end case;
|
2570 |
|
|
end process;
|
2571 |
|
|
|
2572 |
|
|
packet_instruction <= frame_data(15 downto 8);
|
2573 |
|
|
|
2574 |
|
|
with packet_instruction(6 downto 0) select
|
2575 |
|
|
packet_data <= frame_data(7 downto 0) when "000"&X"0",
|
2576 |
|
|
mac_addr(7 downto 0) when "000"&X"1",
|
2577 |
|
|
mac_addr(15 downto 8) when "000"&X"2",
|
2578 |
|
|
mac_addr(23 downto 16) when "000"&X"3",
|
2579 |
|
|
mac_addr(31 downto 24) when "000"&X"4",
|
2580 |
|
|
mac_addr(39 downto 32) when "000"&X"5",
|
2581 |
|
|
mac_addr(47 downto 40) when "000"&X"6",
|
2582 |
|
|
rx_packet_source_mac(7 downto 0) when "000"&X"7",
|
2583 |
|
|
rx_packet_source_mac(15 downto 8) when "000"&X"8",
|
2584 |
|
|
rx_packet_source_mac(23 downto 16) when "000"&X"9",
|
2585 |
|
|
rx_packet_source_mac(31 downto 24) when "000"&X"A",
|
2586 |
|
|
rx_packet_source_mac(39 downto 32) when "000"&X"B",
|
2587 |
|
|
rx_packet_source_mac(47 downto 40) when "000"&X"C",
|
2588 |
|
|
ip_addr(7 downto 0) when "000"&X"D",
|
2589 |
|
|
ip_addr(15 downto 8) when "000"&X"E",
|
2590 |
|
|
ip_addr(23 downto 16) when "000"&X"F",
|
2591 |
|
|
ip_addr(31 downto 24) when "001"&X"0",
|
2592 |
|
|
arp_source_ip_addr(7 downto 0) when "001"&X"1",
|
2593 |
|
|
arp_source_ip_addr(15 downto 8) when "001"&X"2",
|
2594 |
|
|
arp_source_ip_addr(23 downto 16) when "001"&X"3",
|
2595 |
|
|
arp_source_ip_addr(31 downto 24) when "001"&X"4",
|
2596 |
|
|
ip_identification(7 downto 0) when "001"&X"5",
|
2597 |
|
|
ip_identification(15 downto 8) when "001"&X"6",
|
2598 |
|
|
X"00" when "001"&X"7", -- set rx read lower byte
|
2599 |
|
|
X"00" when "001"&X"8", -- set rx read upper byte
|
2600 |
|
|
rx_packet_rd_data2 when "001"&X"9",
|
2601 |
|
|
cloud_ip_addr(7 downto 0) when "001"&X"A",
|
2602 |
|
|
cloud_ip_addr(15 downto 8) when "001"&X"B",
|
2603 |
|
|
cloud_ip_addr(23 downto 16) when "001"&X"C",
|
2604 |
|
|
cloud_ip_addr(31 downto 24) when "001"&X"D",
|
2605 |
|
|
X"00" when "010"&X"0", -- set checksum length lsb
|
2606 |
|
|
X"00" when "010"&X"1", -- set checksum length msb
|
2607 |
|
|
X"00" when "010"&X"2", -- set checksum start addr lsb
|
2608 |
|
|
X"00" when "010"&X"3", -- set checksum start addr msb
|
2609 |
|
|
X"00" when "010"&X"4", -- set checksum wr addr lsb
|
2610 |
|
|
X"00" when "010"&X"5", -- set checksum wr addr msb
|
2611 |
|
|
X"00" when "010"&X"6", -- trigger checksum calc
|
2612 |
|
|
checksum(7 downto 0) when "010"&X"7",
|
2613 |
|
|
checksum(15 downto 8) when "010"&X"8",
|
2614 |
|
|
X"00" when "010"&X"9", -- set tx write addr to checksum wr addr
|
2615 |
|
|
dhcp_transaction_id(7 downto 0) when "010"&X"A",
|
2616 |
|
|
dhcp_transaction_id(15 downto 8) when "010"&X"B",
|
2617 |
|
|
dhcp_transaction_id(23 downto 16) when "010"&X"C",
|
2618 |
|
|
dhcp_transaction_id(31 downto 24) when "010"&X"D",
|
2619 |
|
|
X"00" when "010"&X"E", -- set new transaction ID
|
2620 |
|
|
dhcp_server_ip_addr(7 downto 0) when "010"&X"F",
|
2621 |
|
|
dhcp_server_ip_addr(15 downto 8) when "011"&X"0",
|
2622 |
|
|
dhcp_server_ip_addr(23 downto 16) when "011"&X"1",
|
2623 |
|
|
dhcp_server_ip_addr(31 downto 24) when "011"&X"2",
|
2624 |
|
|
dhcp_your_ip_addr(7 downto 0) when "011"&X"3",
|
2625 |
|
|
dhcp_your_ip_addr(15 downto 8) when "011"&X"4",
|
2626 |
|
|
dhcp_your_ip_addr(23 downto 16) when "011"&X"5",
|
2627 |
|
|
dhcp_your_ip_addr(31 downto 24) when "011"&X"6",
|
2628 |
|
|
client_ip_addr(7 downto 0) when "011"&X"7",
|
2629 |
|
|
client_ip_addr(15 downto 8) when "011"&X"8",
|
2630 |
|
|
client_ip_addr(23 downto 16) when "011"&X"9",
|
2631 |
|
|
client_ip_addr(31 downto 24) when "011"&X"A",
|
2632 |
|
|
client_mac_addr(7 downto 0) when "011"&X"B",
|
2633 |
|
|
client_mac_addr(15 downto 8) when "011"&X"C",
|
2634 |
|
|
client_mac_addr(23 downto 16) when "011"&X"D",
|
2635 |
|
|
client_mac_addr(31 downto 24) when "011"&X"E",
|
2636 |
|
|
client_mac_addr(39 downto 32) when "011"&X"F",
|
2637 |
|
|
client_mac_addr(47 downto 40) when "100"&X"0",
|
2638 |
|
|
listen_port(7 downto 0) when "100"&X"1",
|
2639 |
|
|
listen_port(15 downto 8) when "100"&X"2",
|
2640 |
|
|
client_port(7 downto 0) when "100"&X"3",
|
2641 |
|
|
client_port(15 downto 8) when "100"&X"4",
|
2642 |
|
|
slv(tcp_sequence_number(7 downto 0)) when "100"&X"5",
|
2643 |
|
|
slv(tcp_sequence_number(15 downto 8)) when "100"&X"6",
|
2644 |
|
|
slv(tcp_sequence_number(23 downto 16)) when "100"&X"7",
|
2645 |
|
|
slv(tcp_sequence_number(31 downto 24)) when "100"&X"8",
|
2646 |
|
|
slv(tcp_acknowledge_number(7 downto 0)) when "100"&X"9",
|
2647 |
|
|
slv(tcp_acknowledge_number(15 downto 8)) when "100"&X"A",
|
2648 |
|
|
slv(tcp_acknowledge_number(23 downto 16)) when "100"&X"B",
|
2649 |
|
|
slv(tcp_acknowledge_number(31 downto 24)) when "100"&X"C",
|
2650 |
|
|
tcp_flags(7 downto 0) when "100"&X"D",
|
2651 |
|
|
slv(window_size(7 downto 0)) when "100"&X"E",
|
2652 |
|
|
slv(X"0"&window_size(11 downto 8)) when "100"&X"F",
|
2653 |
|
|
X"00" when "101"&X"0", -- Set initial checksum value
|
2654 |
|
|
X"00" when "101"&X"1", -- Set initial checksum value
|
2655 |
|
|
X"00" when "101"&X"2", -- Load initial checksum value
|
2656 |
|
|
slv(tcp_ip_identification(7 downto 0)) when "101"&X"3",
|
2657 |
|
|
slv(tcp_ip_identification(15 downto 8)) when "101"&X"4",
|
2658 |
|
|
slv(tx_total_packet_length(7 downto 0)) when "101"&X"5", -- Data packet length + headers
|
2659 |
|
|
slv(X"0"&tx_total_packet_length(11 downto 8)) when "101"&X"6", -- Data packet length + headers
|
2660 |
|
|
tcp_tx_data when "101"&X"7", -- TX Data
|
2661 |
|
|
X"00" when "101"&X"8", -- Set checksum length to tx data length
|
2662 |
|
|
X"00" when "101"&X"9", -- Set initial checksum value to length + protocol (6)
|
2663 |
|
|
X"00" when others;
|
2664 |
|
|
|
2665 |
|
|
tcp_sequence_number_p1 <= tcp_sequence_number + 1;
|
2666 |
|
|
|
2667 |
|
|
METADATA_PTOC: process(CLK_IN)
|
2668 |
|
|
begin
|
2669 |
|
|
if rising_edge(CLK_IN) then
|
2670 |
|
|
ip_identification <= lfsr_val(15 downto 0);
|
2671 |
|
|
if tx_packet_state = SET_NEW_TRANSACTION_ID then
|
2672 |
|
|
dhcp_transaction_id <= lfsr_val;
|
2673 |
|
|
end if;
|
2674 |
|
|
if packet_handler_state = CHECK_TCP_SYN_PACKET0 then
|
2675 |
|
|
tcp_ip_identification <= unsigned(lfsr_val(15 downto 0));
|
2676 |
|
|
elsif packet_handler_state = CHECK_TCP_PSH_ACK_PACKET2 then
|
2677 |
|
|
tcp_ip_identification <= tcp_ip_identification + 1;
|
2678 |
|
|
end if;
|
2679 |
|
|
if packet_handler_state = PARSE_TCP_PACKET4 and tcp_connection_active = '0' then
|
2680 |
|
|
client_port <= rx_tcp_source_port;
|
2681 |
|
|
end if;
|
2682 |
|
|
if packet_handler_state = CHECK_TCP_SYN_PACKET0 then
|
2683 |
|
|
tcp_sequence_number <= unsigned(lfsr_val);
|
2684 |
|
|
elsif packet_handler_state = PARSE_TCP_PACKET0 and sent_syn_ack = '1' then
|
2685 |
|
|
tcp_sequence_number <= tcp_sequence_number + 1;
|
2686 |
|
|
elsif packet_handler_state = TRIGGER_TCP_PSH_ACK3 then
|
2687 |
|
|
tcp_sequence_number <= tcp_sequence_number + RESIZE(tx_bytes_to_send, 32);
|
2688 |
|
|
end if;
|
2689 |
|
|
if packet_handler_state = CHECK_TCP_SYN_PACKET0 then
|
2690 |
|
|
tcp_acknowledge_number <= unsigned(rx_tcp_seq_number) + 1;
|
2691 |
|
|
elsif packet_handler_state = TRIGGER_TCP_ACK0 and fin_received = '1' then
|
2692 |
|
|
tcp_acknowledge_number <= tcp_acknowledge_number + 1;
|
2693 |
|
|
elsif packet_handler_state = CHECK_TCP_PSH_ACK_PACKET3 then
|
2694 |
|
|
tcp_acknowledge_number <= tcp_acknowledge_number + RESIZE(rx_data_length, 32);
|
2695 |
|
|
end if;
|
2696 |
|
|
if packet_handler_state = TRIGGER_TCP_ACK0 then
|
2697 |
|
|
if fin_received = '1' then
|
2698 |
|
|
tcp_flags <= C_tcp_fin_ack_flags;
|
2699 |
|
|
elsif syn_ack_packet = '1' then
|
2700 |
|
|
tcp_flags <= C_tcp_syn_ack_flags;
|
2701 |
|
|
else
|
2702 |
|
|
tcp_flags <= C_tcp_ack_flags;
|
2703 |
|
|
end if;
|
2704 |
|
|
elsif packet_handler_state = TRIGGER_TCP_PSH_ACK2 then
|
2705 |
|
|
tcp_flags <= C_tcp_psh_ack_flags;
|
2706 |
|
|
end if;
|
2707 |
|
|
if packet_handler_state = TRIGGER_TCP_ACK0 then
|
2708 |
|
|
window_size <= X"FFF" - unsigned(tcp_rd_data_count);
|
2709 |
|
|
elsif packet_handler_state = TRIGGER_TCP_ACK1 then
|
2710 |
|
|
window_size <= X"FFF" - unsigned(tcp_rd_data_count);
|
2711 |
|
|
end if;
|
2712 |
|
|
if packet_handler_state = CHECK_TCP_SYN_PACKET0 then
|
2713 |
|
|
fin_received <= '0';
|
2714 |
|
|
elsif rx_tcp_flags(0) = '1' then
|
2715 |
|
|
fin_received <= '1';
|
2716 |
|
|
end if;
|
2717 |
|
|
fin_received_p <= fin_received;
|
2718 |
|
|
if fin_received = '1' and fin_received_p = '0' then
|
2719 |
|
|
trigger_fin_ack <= '1';
|
2720 |
|
|
else
|
2721 |
|
|
trigger_fin_ack <= '0';
|
2722 |
|
|
end if;
|
2723 |
|
|
if packet_handler_state = CHECK_TCP_SYN_PACKET0 then
|
2724 |
|
|
syn_ack_packet <= '1';
|
2725 |
|
|
elsif packet_handler_state = TRIGGER_TCP_ACK0 then
|
2726 |
|
|
syn_ack_packet <= '0';
|
2727 |
|
|
end if;
|
2728 |
|
|
if packet_handler_state = TRIGGER_TCP_ACK0 and syn_ack_packet = '1' then
|
2729 |
|
|
sent_syn_ack <= '1';
|
2730 |
|
|
elsif packet_handler_state = CHECK_TCP_PSH_ACK_PACKET0 then
|
2731 |
|
|
sent_syn_ack <= '0';
|
2732 |
|
|
end if;
|
2733 |
|
|
if packet_handler_state = CHECK_TCP_SYN_PACKET0 then
|
2734 |
|
|
tcp_connection_active <= '1';
|
2735 |
|
|
elsif fin_received = '1' then
|
2736 |
|
|
tcp_connection_active <= '0';
|
2737 |
|
|
elsif trigger_close_connection = '1' then
|
2738 |
|
|
tcp_connection_active <= '0';
|
2739 |
|
|
end if;
|
2740 |
|
|
if packet_handler_state = TRIGGER_TCP_PSH_ACK0 then
|
2741 |
|
|
if unsigned(tcp_wr_data_count) > X"580" then
|
2742 |
|
|
tx_bytes_to_send <= X"580";
|
2743 |
|
|
else
|
2744 |
|
|
tx_bytes_to_send <= unsigned(tcp_wr_data_count);
|
2745 |
|
|
end if;
|
2746 |
|
|
end if;
|
2747 |
|
|
if packet_handler_state = TRIGGER_TCP_PSH_ACK1 then
|
2748 |
|
|
tx_total_packet_length <= tx_bytes_to_send + X"030"; -- IP Header length (20 Bytes) + TCP Header length (28 Bytes)
|
2749 |
|
|
end if;
|
2750 |
|
|
if packet_handler_state = TRIGGER_TCP_PSH_ACK1 then
|
2751 |
|
|
tx_total_packet_length_inc_mac <= tx_bytes_to_send + X"03E"; -- IP Header length (20 Bytes) + TCP Header length (28 Bytes) + MAC length (14 bytes)
|
2752 |
|
|
end if;
|
2753 |
|
|
if packet_handler_state = TRIGGER_TCP_PSH_ACK1 then
|
2754 |
|
|
tx_total_packet_length_checksum <= tx_bytes_to_send + X"022"; -- TCP Header length (28 Bytes) + Protocol (value=6)
|
2755 |
|
|
end if;
|
2756 |
|
|
-- TODO need to 'lock' tx logic (so previous tx packet isn't overwritten by arp or something)
|
2757 |
|
|
-- Can be achieved by only responding to TCP packets when tx_packet_no_ack_timeout > X"1"
|
2758 |
|
|
if packet_handler_state = TRIGGER_TCP_PSH_ACK3 then
|
2759 |
|
|
tx_packets_no_ack <= tx_packets_no_ack + 1;
|
2760 |
|
|
elsif packet_handler_state = CHECK_TCP_PSH_ACK_PACKET2 then
|
2761 |
|
|
tx_packets_no_ack <= X"0";
|
2762 |
|
|
end if;
|
2763 |
|
|
if tx_packets_no_ack > X"1" then
|
2764 |
|
|
tx_packet_no_ack_timeout <= tx_packet_no_ack_timeout - 1;
|
2765 |
|
|
else
|
2766 |
|
|
tx_packet_no_ack_timeout <= C_100ms;
|
2767 |
|
|
end if;
|
2768 |
|
|
if tx_packets_no_ack < X"2" then
|
2769 |
|
|
tx_packet_timeout_counter <= X"00";
|
2770 |
|
|
elsif tx_packet_no_ack_timeout = X"000000" then
|
2771 |
|
|
tx_packet_timeout_counter <= tx_packet_timeout_counter + 1;
|
2772 |
|
|
end if;
|
2773 |
|
|
tx_packet_timeout_counter_prev <= tx_packet_timeout_counter;
|
2774 |
|
|
if tx_packet_timeout_counter = X"01" and tx_packet_timeout_counter_prev = X"00" then
|
2775 |
|
|
trigger_send_prev_packet <= '1';
|
2776 |
|
|
elsif tx_packet_timeout_counter = X"03" and tx_packet_timeout_counter_prev = X"02" then
|
2777 |
|
|
trigger_send_prev_packet <= '1';
|
2778 |
|
|
elsif tx_packet_timeout_counter = X"07" and tx_packet_timeout_counter_prev = X"06" then
|
2779 |
|
|
trigger_send_prev_packet <= '1';
|
2780 |
|
|
elsif tx_packet_timeout_counter = X"0F" and tx_packet_timeout_counter_prev = X"0E" then
|
2781 |
|
|
trigger_send_prev_packet <= '1';
|
2782 |
|
|
else
|
2783 |
|
|
trigger_send_prev_packet <= '0';
|
2784 |
|
|
end if;
|
2785 |
|
|
if tx_packet_timeout_counter = X"1F" and tx_packet_timeout_counter_prev = X"1E" then
|
2786 |
|
|
trigger_close_connection <= '1';
|
2787 |
|
|
else
|
2788 |
|
|
trigger_close_connection <= '0';
|
2789 |
|
|
end if;
|
2790 |
|
|
end if;
|
2791 |
|
|
end process;
|
2792 |
|
|
|
2793 |
|
|
FRAME_ADDR_LENGTH_PROC: process(CLK_IN)
|
2794 |
|
|
begin
|
2795 |
|
|
if rising_edge(CLK_IN) then
|
2796 |
|
|
if tx_packet_state = INIT_ARP_REPLY_METADATA then
|
2797 |
|
|
tx_packet_frame_addr <= unsigned(C_arp_reply_frame_addr);
|
2798 |
|
|
elsif tx_packet_state = INIT_ARP_REQUEST_METADATA then
|
2799 |
|
|
tx_packet_frame_addr <= unsigned(C_arp_request_frame_addr);
|
2800 |
|
|
elsif tx_packet_state = INIT_ICMP_REPLY_METADATA then
|
2801 |
|
|
tx_packet_frame_addr <= unsigned(C_icmp_reply_frame_addr);
|
2802 |
|
|
elsif tx_packet_state = INIT_DHCP_DISCOVER_METADATA then
|
2803 |
|
|
tx_packet_frame_addr <= unsigned(C_dhcp_discover_frame_addr);
|
2804 |
|
|
elsif tx_packet_state = INIT_DHCP_REQUEST_METADATA then
|
2805 |
|
|
tx_packet_frame_addr <= unsigned(C_dhcp_request_frame_addr);
|
2806 |
|
|
elsif tx_packet_state = INIT_TCP_PACKET_METADATA then
|
2807 |
|
|
tx_packet_frame_addr <= unsigned(C_tcp_packet_frame_addr);
|
2808 |
|
|
elsif tx_packet_state = INIT_TCP_TX_PACKET_METADATA then
|
2809 |
|
|
tx_packet_frame_addr <= unsigned(C_tcp_tx_packet_frame_addr);
|
2810 |
|
|
elsif tx_packet_state = IDLE then
|
2811 |
|
|
tx_packet_frame_addr <= tx_packet_frame_addr;
|
2812 |
|
|
elsif tx_packet_state = READ_PACKET_BYTE0 then
|
2813 |
|
|
tx_packet_frame_addr <= tx_packet_frame_addr;
|
2814 |
|
|
elsif tx_packet_state = READ_PACKET_BYTE1 then
|
2815 |
|
|
tx_packet_frame_addr <= tx_packet_frame_addr;
|
2816 |
|
|
elsif tx_packet_state = HANDLE_PACKET_INSTRUCTION0 then
|
2817 |
|
|
tx_packet_frame_addr <= tx_packet_frame_addr;
|
2818 |
|
|
elsif tx_packet_state = WAIT_FOR_CHECKSUM_CMPLT then
|
2819 |
|
|
tx_packet_frame_addr <= tx_packet_frame_addr;
|
2820 |
|
|
elsif tx_packet_state = COMPLETE then
|
2821 |
|
|
tx_packet_frame_addr <= tx_packet_frame_addr;
|
2822 |
|
|
elsif tx_packet_state = INIT_LOAD_TX_PACKET_DATA then
|
2823 |
|
|
tx_packet_frame_addr <= tx_packet_frame_addr;
|
2824 |
|
|
elsif tx_packet_state = LOAD_TX_PACKET_DATA then
|
2825 |
|
|
tx_packet_frame_addr <= tx_packet_frame_addr;
|
2826 |
|
|
elsif tx_packet_state = SET_CHECKSUM_LENGTH_TX_PACKET_LENGTH0 then
|
2827 |
|
|
tx_packet_frame_addr <= tx_packet_frame_addr;
|
2828 |
|
|
else
|
2829 |
|
|
tx_packet_frame_addr <= tx_packet_frame_addr + 1;
|
2830 |
|
|
end if;
|
2831 |
|
|
if tx_packet_state = INIT_ARP_REPLY_METADATA then
|
2832 |
|
|
tx_packet_length <= unsigned(C_arp_reply_length);
|
2833 |
|
|
elsif tx_packet_state = INIT_ARP_REQUEST_METADATA then
|
2834 |
|
|
tx_packet_length <= unsigned(C_arp_request_length);
|
2835 |
|
|
elsif tx_packet_state = INIT_ICMP_REPLY_METADATA then
|
2836 |
|
|
tx_packet_length <= unsigned(C_icmp_reply_length);
|
2837 |
|
|
elsif tx_packet_state = INIT_DHCP_DISCOVER_METADATA then
|
2838 |
|
|
tx_packet_length <= unsigned(C_dhcp_discover_length);
|
2839 |
|
|
elsif tx_packet_state = INIT_DHCP_REQUEST_METADATA then
|
2840 |
|
|
tx_packet_length <= unsigned(C_dhcp_request_length);
|
2841 |
|
|
elsif tx_packet_state = INIT_TCP_PACKET_METADATA then
|
2842 |
|
|
tx_packet_length <= unsigned(C_tcp_packet_length);
|
2843 |
|
|
elsif tx_packet_state = INIT_TCP_TX_PACKET_METADATA then
|
2844 |
|
|
tx_packet_length <= RESIZE(unsigned(tx_total_packet_length_inc_mac), 16);
|
2845 |
|
|
end if;
|
2846 |
|
|
if tx_packet_state = INIT_ARP_REPLY_METADATA then
|
2847 |
|
|
tx_packet_end_pointer <= tx_base_addr + unsigned(C_arp_reply_length);
|
2848 |
|
|
prev_tx_packet_end_pointer <= tx_packet_end_pointer;
|
2849 |
|
|
elsif tx_packet_state = INIT_ARP_REQUEST_METADATA then
|
2850 |
|
|
tx_packet_end_pointer <= tx_base_addr + unsigned(C_arp_request_length);
|
2851 |
|
|
prev_tx_packet_end_pointer <= tx_packet_end_pointer;
|
2852 |
|
|
elsif tx_packet_state = INIT_ICMP_REPLY_METADATA then
|
2853 |
|
|
tx_packet_end_pointer <= tx_base_addr + unsigned(C_icmp_reply_length);
|
2854 |
|
|
prev_tx_packet_end_pointer <= tx_packet_end_pointer;
|
2855 |
|
|
elsif tx_packet_state = INIT_DHCP_DISCOVER_METADATA then
|
2856 |
|
|
tx_packet_end_pointer <= tx_base_addr + unsigned(C_dhcp_discover_length);
|
2857 |
|
|
prev_tx_packet_end_pointer <= tx_packet_end_pointer;
|
2858 |
|
|
elsif tx_packet_state = INIT_DHCP_REQUEST_METADATA then
|
2859 |
|
|
tx_packet_end_pointer <= tx_base_addr + unsigned(C_dhcp_discover_length);
|
2860 |
|
|
prev_tx_packet_end_pointer <= tx_packet_end_pointer;
|
2861 |
|
|
elsif tx_packet_state = INIT_TCP_PACKET_METADATA then
|
2862 |
|
|
tx_packet_end_pointer <= tx_base_addr + unsigned(C_tcp_packet_length);
|
2863 |
|
|
prev_tx_packet_end_pointer <= tx_packet_end_pointer;
|
2864 |
|
|
elsif tx_packet_state = INIT_TCP_TX_PACKET_METADATA then
|
2865 |
|
|
tx_packet_end_pointer <= tx_base_addr + RESIZE(unsigned(tx_total_packet_length_inc_mac), 16);
|
2866 |
|
|
prev_tx_packet_end_pointer <= tx_packet_end_pointer;
|
2867 |
|
|
end if;
|
2868 |
|
|
if tx_packet_state = IDLE then
|
2869 |
|
|
doing_tx_packet_config <= '0';
|
2870 |
|
|
else
|
2871 |
|
|
doing_tx_packet_config <= '1';
|
2872 |
|
|
end if;
|
2873 |
|
|
if tx_packet_state = IDLE then
|
2874 |
|
|
tx_packet_ram_we_addr_buf <= "00000000000";
|
2875 |
|
|
elsif tx_packet_state = HANDLE_PACKET_INSTRUCTION1 then
|
2876 |
|
|
tx_packet_ram_we_addr_buf <= tx_packet_ram_we_addr_buf + 1;
|
2877 |
|
|
elsif tx_packet_state = LOAD_TX_PACKET_DATA then
|
2878 |
|
|
tx_packet_ram_we_addr_buf <= tx_packet_ram_we_addr_buf + 1;
|
2879 |
|
|
elsif tx_packet_state = MOVE_TX_PACKET_WR_ADDR then
|
2880 |
|
|
tx_packet_ram_we_addr_buf <= unsigned(checksum_wr_addr);
|
2881 |
|
|
end if;
|
2882 |
|
|
if tx_packet_state = COMPLETE then
|
2883 |
|
|
tx_packet_ready_for_transmission <= '1';
|
2884 |
|
|
elsif eth_state = HANDLE_TX_TRANSMIT22 then
|
2885 |
|
|
tx_packet_ready_for_transmission <= '0';
|
2886 |
|
|
end if;
|
2887 |
|
|
if tx_packet_state = SET_RX_PACKET_ADDR_LOWER_BYTE then
|
2888 |
|
|
rx_packet_rd2_addr(7 downto 0) <= unsigned(frame_data(7 downto 0));
|
2889 |
|
|
elsif tx_packet_state = SET_RX_PACKET_ADDR_UPPER_BYTE then
|
2890 |
|
|
rx_packet_rd2_addr(10 downto 8) <= unsigned(frame_data(2 downto 0));
|
2891 |
|
|
elsif tx_packet_state = HANDLE_PACKET_INSTRUCTION1 then
|
2892 |
|
|
rx_packet_rd2_addr <= rx_packet_rd2_addr + 1;
|
2893 |
|
|
elsif tx_packet_state = LOAD_TX_PACKET_DATA then
|
2894 |
|
|
rx_packet_rd2_addr <= rx_packet_rd2_addr + 1;
|
2895 |
|
|
end if;
|
2896 |
|
|
end if;
|
2897 |
|
|
end process;
|
2898 |
|
|
|
2899 |
|
|
tx_base_addr <= C_tx_base_addr1 when tx_base_addr_select = '0' else C_tx_base_addr2;
|
2900 |
|
|
|
2901 |
|
|
process(CLK_IN)
|
2902 |
|
|
begin
|
2903 |
|
|
if rising_edge(CLK_IN) then
|
2904 |
|
|
if eth_state = HANDLE_TX_TRANSMIT22 or eth_state = HANDLE_TX_TRANSMIT_PREV16 then
|
2905 |
|
|
tx_base_addr_select <= not(tx_base_addr_select);
|
2906 |
|
|
end if;
|
2907 |
|
|
if eth_state = WAIT_FOR_TRANSMIT_CMPLT then
|
2908 |
|
|
tx_timeout_counter <= tx_timeout_counter - 1;
|
2909 |
|
|
else
|
2910 |
|
|
tx_timeout_counter <= C_20ms;
|
2911 |
|
|
end if;
|
2912 |
|
|
end if;
|
2913 |
|
|
end process;
|
2914 |
|
|
|
2915 |
|
|
tx_packet_ram_data <= packet_data;
|
2916 |
|
|
tx_packet_ram_we <= '1' when (tx_packet_state = HANDLE_PACKET_INSTRUCTION1) or (tx_packet_state = LOAD_TX_PACKET_DATA) else '0';
|
2917 |
|
|
tx_packet_config_cmplt <= '1' when tx_packet_state = COMPLETE else '0';
|
2918 |
|
|
|
2919 |
|
|
tx_packet_ram_we_addr <= unsigned(checksum_addr) when (tx_packet_state = WAIT_FOR_CHECKSUM_CMPLT) else tx_packet_ram_we_addr_buf;
|
2920 |
|
|
|
2921 |
|
|
TX_PACKET_RAM : TDP_RAM
|
2922 |
|
|
Generic Map ( G_DATA_A_SIZE => tx_packet_ram_data'length,
|
2923 |
|
|
G_ADDR_A_SIZE => tx_packet_ram_we_addr'length,
|
2924 |
|
|
G_RELATION => 0, --log2(SIZE_A/SIZE_B)
|
2925 |
|
|
G_INIT_ZERO => true,
|
2926 |
|
|
G_INIT_FILE => "")
|
2927 |
|
|
Port Map ( CLK_A_IN => CLK_IN,
|
2928 |
|
|
WE_A_IN => tx_packet_ram_we,
|
2929 |
|
|
ADDR_A_IN => slv(tx_packet_ram_we_addr),
|
2930 |
|
|
DATA_A_IN => tx_packet_ram_data,
|
2931 |
|
|
DATA_A_OUT => tx_packet_rd_data2,
|
2932 |
|
|
CLK_B_IN => CLK_IN,
|
2933 |
|
|
WE_B_IN => '0',
|
2934 |
|
|
ADDR_B_IN => slv(tx_packet_ram_rd_addr),
|
2935 |
|
|
DATA_B_IN => X"00",
|
2936 |
|
|
DATA_B_OUT => tx_packet_rd_data);
|
2937 |
|
|
|
2938 |
|
|
CHECKSUM_METADATA_PROC: process(CLK_IN)
|
2939 |
|
|
begin
|
2940 |
|
|
if rising_edge(CLK_IN) then
|
2941 |
|
|
if tx_packet_state = SET_CHECKSUM_LENGTH_LSB then
|
2942 |
|
|
checksum_count(7 downto 0) <= unsigned(frame_data(7 downto 0));
|
2943 |
|
|
elsif tx_packet_state = SET_CHECKSUM_LENGTH_MSB then
|
2944 |
|
|
checksum_count(10 downto 8) <= unsigned(frame_data(2 downto 0));
|
2945 |
|
|
elsif tx_packet_state = SET_CHECKSUM_LENGTH_TX_PACKET_LENGTH0 then
|
2946 |
|
|
checksum_count(10 downto 0) <= unsigned('0'&tx_bytes_to_send(10 downto 1)) + "00000010010";
|
2947 |
|
|
elsif tx_packet_state = SET_CHECKSUM_LENGTH_TX_PACKET_LENGTH1 then
|
2948 |
|
|
checksum_count(10 downto 0) <= checksum_count(10 downto 0) + ("0000000000"&tx_bytes_to_send(0));
|
2949 |
|
|
end if;
|
2950 |
|
|
if tx_packet_state = SET_CHECKSUM_LENGTH_TX_PACKET_LENGTH1 then
|
2951 |
|
|
checksum_odd_length <= tx_bytes_to_send(0);
|
2952 |
|
|
elsif tx_packet_state = MOVE_TX_PACKET_WR_ADDR then -- clear odd flag before next checksum is calcd
|
2953 |
|
|
checksum_odd_length <= '0';
|
2954 |
|
|
end if;
|
2955 |
|
|
if tx_packet_state = SET_CHECKSUM_START_ADDR_LSB then
|
2956 |
|
|
checksum_start_addr(7 downto 0) <= frame_data(7 downto 0);
|
2957 |
|
|
elsif tx_packet_state = SET_CHECKSUM_START_ADDR_MSB then
|
2958 |
|
|
checksum_start_addr(10 downto 8) <= frame_data(2 downto 0);
|
2959 |
|
|
end if;
|
2960 |
|
|
if tx_packet_state = SET_CHECKSUM_WR_ADDR_LSB then
|
2961 |
|
|
checksum_wr_addr(7 downto 0) <= frame_data(7 downto 0);
|
2962 |
|
|
elsif tx_packet_state = SET_CHECKSUM_WR_ADDR_MSB then
|
2963 |
|
|
checksum_wr_addr(10 downto 8) <= frame_data(2 downto 0);
|
2964 |
|
|
end if;
|
2965 |
|
|
if tx_packet_state = SET_CHECKSUM_START_VAL_LSB then
|
2966 |
|
|
checksum_initial_value(7 downto 0) <= frame_data(7 downto 0);
|
2967 |
|
|
elsif tx_packet_state = SET_CHECKSUM_INITIAL_VALUE_TX_PACKET then
|
2968 |
|
|
checksum_initial_value(7 downto 0) <= slv(tx_total_packet_length_checksum(7 downto 0));
|
2969 |
|
|
end if;
|
2970 |
|
|
if tx_packet_state = SET_CHECKSUM_START_VAL_MSB then
|
2971 |
|
|
checksum_initial_value(15 downto 8) <= frame_data(7 downto 0);
|
2972 |
|
|
elsif tx_packet_state = SET_CHECKSUM_INITIAL_VALUE_TX_PACKET then
|
2973 |
|
|
checksum_initial_value(11 downto 8) <= slv(tx_total_packet_length_checksum(11 downto 8));
|
2974 |
|
|
checksum_initial_value(15 downto 12) <= X"0";
|
2975 |
|
|
end if;
|
2976 |
|
|
if tx_packet_state = TRIGGER_CHECKSUM_LOAD_INITIAL_VALUE then
|
2977 |
|
|
checksum_set_initial_value <= '1';
|
2978 |
|
|
else
|
2979 |
|
|
checksum_set_initial_value <= '0';
|
2980 |
|
|
end if;
|
2981 |
|
|
if tx_packet_state = INIT_LOAD_TX_PACKET_DATA then
|
2982 |
|
|
tx_packet_data_counter <= tx_bytes_to_send - 1;
|
2983 |
|
|
else
|
2984 |
|
|
tx_packet_data_counter <= tx_packet_data_counter - 1;
|
2985 |
|
|
end if;
|
2986 |
|
|
end if;
|
2987 |
|
|
end process;
|
2988 |
|
|
|
2989 |
|
|
calc_checksum <= '1' when tx_packet_state = TRIG_CHECKSUM_CALC else '0';
|
2990 |
|
|
|
2991 |
|
|
checksum_calc_mod : checksum_calc
|
2992 |
|
|
Port Map ( CLK_IN => CLK_IN,
|
2993 |
|
|
RST_IN => '0',
|
2994 |
|
|
CHECKSUM_CALC_IN => calc_checksum,
|
2995 |
|
|
START_ADDR_IN => checksum_start_addr,
|
2996 |
|
|
COUNT_IN => slv(checksum_count),
|
2997 |
|
|
VALUE_IN => tx_packet_rd_data2,
|
2998 |
|
|
VALUE_ADDR_OUT => checksum_addr,
|
2999 |
|
|
CHECKSUM_INIT_IN => checksum_initial_value,
|
3000 |
|
|
CHECKSUM_SET_INIT_IN => checksum_set_initial_value,
|
3001 |
|
|
CHECKSUM_ODD_LENGTH_IN => checksum_odd_length,
|
3002 |
|
|
CHECKSUM_OUT => checksum,
|
3003 |
|
|
CHECKSUM_DONE_OUT => checksum_calc_done);
|
3004 |
|
|
|
3005 |
|
|
------------------- PACKET DEFINITION ------------------------
|
3006 |
|
|
|
3007 |
|
|
Packet_Definition_Mod : Packet_Definition
|
3008 |
|
|
Port Map (
|
3009 |
|
|
clka => CLK_IN,
|
3010 |
|
|
addra => packet_definition_addr,
|
3011 |
|
|
douta => packet_definition_data);
|
3012 |
|
|
|
3013 |
|
|
------------------------- SPI --------------------------------
|
3014 |
|
|
|
3015 |
|
|
spi_mod_inst : spi_mod
|
3016 |
|
|
Port Map ( CLK_IN => CLK_IN,
|
3017 |
|
|
RST_IN => '0',
|
3018 |
|
|
|
3019 |
|
|
WR_CONTINUOUS_IN => spi_wr_continuous,
|
3020 |
|
|
WE_IN => spi_we,
|
3021 |
|
|
WR_ADDR_IN => spi_wr_addr,
|
3022 |
|
|
WR_DATA_IN => spi_wr_data,
|
3023 |
|
|
WR_DATA_CMPLT_OUT => spi_wr_cmplt,
|
3024 |
|
|
|
3025 |
|
|
RD_CONTINUOUS_IN => spi_rd_continuous,
|
3026 |
|
|
RD_IN => spi_rd,
|
3027 |
|
|
RD_WIDTH_IN => spi_rd_width,
|
3028 |
|
|
RD_ADDR_IN => spi_rd_addr,
|
3029 |
|
|
RD_DATA_OUT => spi_data_rd,
|
3030 |
|
|
RD_DATA_CMPLT_OUT => spi_rd_cmplt,
|
3031 |
|
|
|
3032 |
|
|
SLOW_CS_EN_IN => slow_cs_en,
|
3033 |
|
|
OPER_CMPLT_POST_CS_OUT => spi_oper_cmplt,
|
3034 |
|
|
|
3035 |
|
|
SDI_OUT => SDI_OUT,
|
3036 |
|
|
SDO_IN => SDO_IN,
|
3037 |
|
|
SCLK_OUT => SCLK_OUT,
|
3038 |
|
|
CS_OUT => CS_OUT);
|
3039 |
|
|
|
3040 |
|
|
------------------------- LFSR -------------------------------
|
3041 |
|
|
|
3042 |
|
|
lfsr32_mod_inst : lfsr32_mod
|
3043 |
|
|
Port Map ( CLK_IN => CLK_IN,
|
3044 |
|
|
SEED_IN => X"00000000",
|
3045 |
|
|
SEED_EN_IN => '0',
|
3046 |
|
|
VAL_OUT => lfsr_val);
|
3047 |
|
|
|
3048 |
|
|
--------------------- TCP RX DATA ----------------------------
|
3049 |
|
|
|
3050 |
|
|
TCP_CONNECTION_ACTIVE_OUT <= tcp_connection_active;
|
3051 |
|
|
|
3052 |
|
|
tcp_data_rd_en <= TCP_RD_DATA_EN_IN;
|
3053 |
|
|
TCP_RD_DATA_AVAIL_OUT <= not(tcp_rd_data_available);
|
3054 |
|
|
TCP_RD_DATA_OUT <= tcp_rx_data_rd_data;
|
3055 |
|
|
|
3056 |
|
|
tcp_rx_data_we <= '1' when (packet_handler_next_state = READ_TCP_RX_DATA) else '0';
|
3057 |
|
|
|
3058 |
|
|
TCP_RX_FIFO : TCP_FIFO
|
3059 |
|
|
PORT MAP (
|
3060 |
|
|
clk => CLK_IN,
|
3061 |
|
|
din => rx_packet_rd_data,
|
3062 |
|
|
wr_en => tcp_rx_data_we,
|
3063 |
|
|
rd_en => tcp_data_rd_en,
|
3064 |
|
|
dout => tcp_rx_data_rd_data,
|
3065 |
|
|
full => open,
|
3066 |
|
|
almost_full => open,
|
3067 |
|
|
empty => tcp_rd_data_available,
|
3068 |
|
|
data_count => tcp_rd_data_count);
|
3069 |
|
|
|
3070 |
|
|
--------------------- TCP TX DATA ----------------------------
|
3071 |
|
|
|
3072 |
|
|
TCP_WR_DATA_POSSIBLE_OUT <= tcp_wr_data_possible;
|
3073 |
|
|
tcp_wr_data_possible <= '1' when tcp_wr_data_count < X"FA0" else '0';
|
3074 |
|
|
|
3075 |
|
|
tcp_wr_data_en <= TCP_WR_DATA_EN_IN;
|
3076 |
|
|
tcp_wr_data <= TCP_WR_DATA_IN;
|
3077 |
|
|
tcp_wr_data_flush <= TCP_WR_DATA_FLUSH_IN;
|
3078 |
|
|
tcp_tx_data_rd <= '1' when (tx_packet_state = LOAD_TX_PACKET_DATA) or (tx_packet_state = INIT_LOAD_TX_PACKET_DATA) else '0'; -- TODO or previous state = LOAD_TX_PACKET_DATA
|
3079 |
|
|
|
3080 |
|
|
TCP_TX_FIFO : TCP_FIFO
|
3081 |
|
|
PORT MAP (
|
3082 |
|
|
clk => CLK_IN,
|
3083 |
|
|
din => tcp_wr_data,
|
3084 |
|
|
wr_en => tcp_wr_data_en,
|
3085 |
|
|
rd_en => tcp_tx_data_rd,
|
3086 |
|
|
dout => tcp_tx_data,
|
3087 |
|
|
full => open,
|
3088 |
|
|
almost_full => open,
|
3089 |
|
|
empty => open,
|
3090 |
|
|
data_count => tcp_wr_data_count);
|
3091 |
|
|
|
3092 |
|
|
--- Network Stats ---
|
3093 |
|
|
|
3094 |
|
|
-- process(CLK_IN)
|
3095 |
|
|
-- begin
|
3096 |
|
|
-- if rising_edge(CLK_IN) then
|
3097 |
|
|
-- clk_1hz_prev <= clk_1hz;
|
3098 |
|
|
-- if clk_1hz_prev = '0' and clk_1hz = '1' then
|
3099 |
|
|
-- rx_kbytes_sec <= rx_bytes_counter(21 downto 10);
|
3100 |
|
|
-- end if;
|
3101 |
|
|
-- if clk_1hz_prev = '0' and clk_1hz = '1' then
|
3102 |
|
|
-- rx_bytes_counter <= (others => '0');
|
3103 |
|
|
-- elsif packet_handler_state = CHECK_TCP_PSH_ACK_PACKET2 then
|
3104 |
|
|
-- rx_bytes_counter <= rx_bytes_counter + RESIZE(total_packet_length, 22);
|
3105 |
|
|
-- end if;
|
3106 |
|
|
-- end if;
|
3107 |
|
|
-- end process;
|
3108 |
|
|
|
3109 |
|
|
--- DATA I/O ---
|
3110 |
|
|
|
3111 |
|
|
-- process(CLK_IN)
|
3112 |
|
|
-- begin
|
3113 |
|
|
-- if rising_edge(CLK_IN) then
|
3114 |
|
|
-- if ADDR_IN = X"00" then
|
3115 |
|
|
-- DATA_OUT <= "0000000" & network_interface_enabled;
|
3116 |
|
|
-- elsif ADDR_IN = X"01" then
|
3117 |
|
|
-- DATA_OUT <= mac_addr(47 downto 40);
|
3118 |
|
|
-- elsif ADDR_IN = X"02" then
|
3119 |
|
|
-- DATA_OUT <= mac_addr(39 downto 32);
|
3120 |
|
|
-- elsif ADDR_IN = X"03" then
|
3121 |
|
|
-- DATA_OUT <= mac_addr(31 downto 24);
|
3122 |
|
|
-- elsif ADDR_IN = X"04" then
|
3123 |
|
|
-- DATA_OUT <= mac_addr(23 downto 16);
|
3124 |
|
|
-- elsif ADDR_IN = X"05" then
|
3125 |
|
|
-- DATA_OUT <= mac_addr(15 downto 8);
|
3126 |
|
|
-- elsif ADDR_IN = X"06" then
|
3127 |
|
|
-- DATA_OUT <= mac_addr(7 downto 0);
|
3128 |
|
|
-- elsif ADDR_IN = X"07" then
|
3129 |
|
|
-- DATA_OUT <= "0000000" & dhcp_enable;
|
3130 |
|
|
-- elsif ADDR_IN = X"08" then
|
3131 |
|
|
-- DATA_OUT <= "000000" & static_addr_locked & dhcp_addr_locked;
|
3132 |
|
|
-- elsif ADDR_IN = X"09" then
|
3133 |
|
|
-- DATA_OUT <= ip_addr(31 downto 24);
|
3134 |
|
|
-- elsif ADDR_IN = X"0A" then
|
3135 |
|
|
-- DATA_OUT <= ip_addr(23 downto 16);
|
3136 |
|
|
-- elsif ADDR_IN = X"0B" then
|
3137 |
|
|
-- DATA_OUT <= ip_addr(15 downto 8);
|
3138 |
|
|
-- elsif ADDR_IN = X"0C" then
|
3139 |
|
|
-- DATA_OUT <= ip_addr(7 downto 0);
|
3140 |
|
|
-- elsif ADDR_IN = X"0D" then
|
3141 |
|
|
-- DATA_OUT <= cloud_ip_addr(31 downto 24);
|
3142 |
|
|
-- elsif ADDR_IN = X"0E" then
|
3143 |
|
|
-- DATA_OUT <= cloud_ip_addr(23 downto 16);
|
3144 |
|
|
-- elsif ADDR_IN = X"0F" then
|
3145 |
|
|
-- DATA_OUT <= cloud_ip_addr(15 downto 8);
|
3146 |
|
|
-- elsif ADDR_IN = X"10" then
|
3147 |
|
|
-- DATA_OUT <= cloud_ip_addr(7 downto 0);
|
3148 |
|
|
-- elsif ADDR_IN = X"11" then
|
3149 |
|
|
-- DATA_OUT <= "0000000" & tcp_connection_active;
|
3150 |
|
|
-- end if;
|
3151 |
|
|
-- end if;
|
3152 |
|
|
-- end process;
|
3153 |
|
|
|
3154 |
|
|
end Behavioral;
|
3155 |
|
|
|