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[/] [udp_ip_stack/] [trunk/] [rtl/] [vhdl/] [IP_complete_nomac.vhd] - Blame information for rev 2

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----------------------------------------------------------------------------------
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-- Company: 
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-- Engineer: 
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-- 
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-- Create Date:    12:43:16 06/04/2011 
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-- Design Name: 
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-- Module Name:    IP_complete_nomac - Behavioral 
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-- Project Name: 
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-- Target Devices: 
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-- Tool versions: 
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-- Description: Implements complete IP stack with ARP (but no MAC)
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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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-- Revision 0.02 - separated RX and TX clocks
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-- Additional Comments: 
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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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use work.axi.all;
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use work.ipv4_types.all;
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use work.arp_types.all;
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entity IP_complete_nomac is
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    Port (
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                        -- IP Layer signals
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                        ip_tx_start                             : in std_logic;
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                        ip_tx                                           : in ipv4_tx_type;                                                              -- IP tx cxns
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                        ip_tx_result                    : out std_logic_vector (1 downto 0);             -- tx status (changes during transmission)
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                        ip_tx_data_out_ready    : out std_logic;                                                                        -- indicates IP TX is ready to take data
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                        ip_rx_start                             : out std_logic;                                                                        -- indicates receipt of ip frame.
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                        ip_rx                                           : out ipv4_rx_type;
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                        -- system signals
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                        rx_clk                                  : in  STD_LOGIC;
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                        tx_clk                                  : in  STD_LOGIC;
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                        reset                                   : in  STD_LOGIC;
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                        our_ip_address          : in STD_LOGIC_VECTOR (31 downto 0);
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                        our_mac_address                 : in std_logic_vector (47 downto 0);
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                        -- status signals
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                        arp_pkt_count                   : out STD_LOGIC_VECTOR(7 downto 0);                      -- count of arp pkts received
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                        ip_pkt_count                    : out STD_LOGIC_VECTOR(7 downto 0);                      -- number of IP pkts received for us
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                        -- MAC Transmitter
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                        mac_tx_tdata         : out  std_logic_vector(7 downto 0);        -- data byte to tx
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                        mac_tx_tvalid        : out  std_logic;                                                  -- tdata is valid
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                        mac_tx_tready        : in std_logic;                                                    -- mac is ready to accept data
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                        mac_tx_tlast         : out  std_logic;                                                  -- indicates last byte of frame
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                        -- MAC Receiver
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                        mac_rx_tdata         : in std_logic_vector(7 downto 0);  -- data byte received
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                        mac_rx_tvalid        : in std_logic;                                                    -- indicates tdata is valid
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                        mac_rx_tready        : out  std_logic;                                                  -- tells mac that we are ready to take data
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                        mac_rx_tlast         : in std_logic                                                             -- indicates last byte of the trame
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                        );
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end IP_complete_nomac;
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architecture structural of IP_complete_nomac is
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    COMPONENT IPv4
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    PORT(
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                        -- IP Layer signals
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                        ip_tx_start                             : in std_logic;
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                        ip_tx                                           : in ipv4_tx_type;                                                              -- IP tx cxns
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                        ip_tx_result                    : out std_logic_vector (1 downto 0);             -- tx status (changes during transmission)
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                        ip_tx_data_out_ready    : out std_logic;                                                                        -- indicates IP TX is ready to take data
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                        ip_rx_start                             : out std_logic;                                                                        -- indicates receipt of ip frame.
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                        ip_rx                                           : out ipv4_rx_type;
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                        -- system control signals
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                        rx_clk                                  : in  STD_LOGIC;
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                        tx_clk                                  : in  STD_LOGIC;
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                        reset                                   : in  STD_LOGIC;
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                        our_ip_address          : in STD_LOGIC_VECTOR (31 downto 0);
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                        our_mac_address                 : in std_logic_vector (47 downto 0);
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                        -- system status signals
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                        rx_pkt_count                    : out STD_LOGIC_VECTOR(7 downto 0);                      -- number of IP pkts received for us
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                        -- ARP lookup signals
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                        arp_req_req                             : out arp_req_req_type;
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                        arp_req_rslt                    : in arp_req_rslt_type;
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                        -- MAC layer RX signals
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                        mac_data_in                     : in  STD_LOGIC_VECTOR (7 downto 0);             -- ethernet frame (from dst mac addr through to last byte of frame)
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                        mac_data_in_valid       : in  STD_LOGIC;                                                                        -- indicates data_in valid on clock
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                        mac_data_in_last                : in  STD_LOGIC;                                                                        -- indicates last data in frame
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                        -- MAC layer TX signals
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                        mac_tx_req                              : out std_logic;                                                                        -- indicates that ip wants access to channel (stays up for as long as tx)
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                        mac_tx_granted                  : in std_logic;                                                                 -- indicates that access to channel has been granted            
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                        mac_data_out_ready      : in std_logic;                                                                 -- indicates system ready to consume data
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                        mac_data_out_valid      : out std_logic;                                                                        -- indicates data out is valid
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                        mac_data_out_last               : out std_logic;                                                                        -- with data out valid indicates the last byte of a frame
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                        mac_data_out                    : out std_logic_vector (7 downto 0)                      -- ethernet frame (from dst mac addr through to last byte of frame)      
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         );
93
         END COMPONENT;
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95
    COMPONENT arp
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    PORT(
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                        -- lookup request signals
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                        arp_req_req                     : in arp_req_req_type;
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                        arp_req_rslt            : out arp_req_rslt_type;
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                        -- MAC layer RX signals
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                        data_in_clk             : in  STD_LOGIC;
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                        reset                           : in  STD_LOGIC;
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                        data_in                                 : in  STD_LOGIC_VECTOR (7 downto 0);             -- ethernet frame (from dst mac addr through to last byte of frame)
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                        data_in_valid           : in  STD_LOGIC;                                                                        -- indicates data_in valid on clock
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                        data_in_last            : in  STD_LOGIC;                                                                        -- indicates last data in frame
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                        -- MAC layer TX signals
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                        mac_tx_req                      : out std_logic;                                                                        -- indicates that ip wants access to channel (stays up for as long as tx)
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                        mac_tx_granted          : in std_logic;                                                                 -- indicates that access to channel has been granted            
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                        data_out_clk            : in std_logic;
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                        data_out_ready          : in std_logic;                                                                 -- indicates system ready to consume data
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                        data_out_valid          : out std_logic;                                                                        -- indicates data out is valid
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                        data_out_last           : out std_logic;                                                                        -- with data out valid indicates the last byte of a frame
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                        data_out                                : out std_logic_vector (7 downto 0);             -- ethernet frame (from dst mac addr through to last byte of frame)
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                        -- system signals
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                        our_mac_address         : in STD_LOGIC_VECTOR (47 downto 0);
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                        our_ip_address  : in STD_LOGIC_VECTOR (31 downto 0);
117
                        req_count                       : out STD_LOGIC_VECTOR(7 downto 0)                       -- count of arp pkts received
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         );
119
         END COMPONENT;
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121
    COMPONENT tx_arbitrator
122
    PORT(
123
                clk                             : in std_logic;
124
                reset                           : in std_logic;
125
 
126
                req_1                           : in  std_logic;
127
                grant_1                 : out std_logic;
128
      data_1         : in  std_logic_vector(7 downto 0); -- data byte to tx
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      valid_1        : in  std_logic;                                                   -- tdata is valid
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      last_1         : in  std_logic;                                                   -- indicates last byte of frame
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132
                req_2                           : in  std_logic;
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                grant_2                 : out std_logic;
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      data_2         : in  std_logic_vector(7 downto 0); -- data byte to tx
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      valid_2        : in  std_logic;                                                   -- tdata is valid
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      last_2         : in  std_logic;                                                   -- indicates last byte of frame
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      data              : out  std_logic_vector(7 downto 0);     -- data byte to tx
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      valid             : out  std_logic;                                                       -- tdata is valid
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      last              : out  std_logic                                                        -- indicates last byte of frame
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         );
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         END COMPONENT;
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        ---------------------------
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        -- Signals
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        ---------------------------
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        -- ARP REQUEST
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        signal arp_req_req_int          : arp_req_req_type;
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        signal arp_req_rslt_int         : arp_req_rslt_type;
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        -- MAC arbitration busses
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        signal ip_mac_req                               : std_logic;
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        signal ip_mac_grant                     : std_logic;
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        signal ip_mac_data_out          : std_logic_vector (7 downto 0);
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        signal ip_mac_valid                     : std_logic;
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        signal ip_mac_last                      : std_logic;
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        signal arp_mac_req                      : std_logic;
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        signal arp_mac_grant                    : std_logic;
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        signal arp_mac_data_out         : std_logic_vector (7 downto 0);
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        signal arp_mac_valid                    : std_logic;
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        signal arp_mac_last                     : std_logic;
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        -- MAC RX bus
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        signal mac_rx_tready_int        : std_logic;
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        -- MAC TX bus
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        signal mac_tx_tdata_int         : std_logic_vector (7 downto 0);
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        signal mac_tx_tvalid_int        : std_logic;
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        signal mac_tx_tlast_int         : std_logic;
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        -- control signals
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        signal mac_tx_granted_int       : std_logic;
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begin
172
 
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        mac_rx_tready_int <= '1';               -- enable the mac receiver
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        -- set followers
176
        mac_tx_tdata <= mac_tx_tdata_int;
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        mac_tx_tvalid <= mac_tx_tvalid_int;
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        mac_tx_tlast <= mac_tx_tlast_int;
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        mac_rx_tready <= mac_rx_tready_int;
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   ------------------------------------------------------------------------------
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   -- Instantiate the IP layer
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   ------------------------------------------------------------------------------
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    IP_layer : IPv4 PORT MAP
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                (
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          ip_tx_start                   => ip_tx_start,
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          ip_tx                                         => ip_tx,
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          ip_tx_result                  => ip_tx_result,
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          ip_tx_data_out_ready=> ip_tx_data_out_ready,
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          ip_rx_start                   => ip_rx_start,
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          ip_rx                                         => ip_rx,
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          rx_clk                                        => rx_clk,
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          tx_clk                                        => tx_clk,
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          reset                                         => reset,
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          our_ip_address                => our_ip_address,
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          our_mac_address               => our_mac_address,
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                         rx_pkt_count                   => ip_pkt_count,
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          arp_req_req                   => arp_req_req_int,
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          arp_req_rslt                  => arp_req_rslt_int,
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          mac_tx_req                    => ip_mac_req,
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          mac_tx_granted                => ip_mac_grant,
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          mac_data_out_ready    => mac_tx_tready,
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          mac_data_out_valid    => ip_mac_valid,
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          mac_data_out_last     => ip_mac_last,
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          mac_data_out                  => ip_mac_data_out,
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          mac_data_in                   => mac_rx_tdata,
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          mac_data_in_valid     => mac_rx_tvalid,
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          mac_data_in_last      => mac_rx_tlast
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        );
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   ------------------------------------------------------------------------------
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   -- Instantiate the ARP layer
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   ------------------------------------------------------------------------------
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        arp_layer : arp
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                 Port map(
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                        -- request signals
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                          arp_req_req                                   => arp_req_req_int,
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                          arp_req_rslt                                  => arp_req_rslt_int,
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                          -- rx signals
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                          data_in_clk                   => rx_clk,
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                          reset                         => reset,
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                          data_in                       => mac_rx_tdata,
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                          data_in_valid                 => mac_rx_tvalid,
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                          data_in_last                  => mac_rx_tlast,
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                          -- tx signals
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                          mac_tx_req                                    => arp_mac_req,
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                          mac_tx_granted                                => arp_mac_grant,
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                          data_out_clk                                  => tx_clk,
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                          data_out_ready                                => mac_tx_tready,
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                          data_out_valid                                => arp_mac_valid,
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                          data_out_last                         => arp_mac_last,
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                          data_out                                              => arp_mac_data_out,
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                          -- system signals
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                          our_mac_address                               => our_mac_address,
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                          our_ip_address                                => our_ip_address,
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                          req_count                                             => arp_pkt_count
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                          );
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   ------------------------------------------------------------------------------
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   -- Instantiate the TX Arbitrator 
244
   ------------------------------------------------------------------------------
245
        mac_tx_arb : tx_arbitrator
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                 Port map(
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                                clk                                             => tx_clk,
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                                reset                           => reset,
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                                req_1                                                   => ip_mac_req,
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                                grant_1                                         => ip_mac_grant,
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                                data_1                          => ip_mac_data_out,
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                                valid_1                         => ip_mac_valid,
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                                last_1                                          => ip_mac_last,
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                                req_2                                                   => arp_mac_req,
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                                grant_2                                         => arp_mac_grant,
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                                data_2                          => arp_mac_data_out,
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                                valid_2                         => arp_mac_valid,
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                                last_2                                          => arp_mac_last,
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262
                                data                                    => mac_tx_tdata_int,
263
                                valid                                   => mac_tx_tvalid_int,
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                                last                                    => mac_tx_tlast_int
265
                          );
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267
end structural;
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