Subversion Repositories udp_ip_stack

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-- Company: 

-- Engineer: 

-- 

-- Create Date:    09:38:49 06/13/2011 

-- Design Name: 

-- Module Name:    UDP_Complete_nomac - Behavioral 

-- Project Name: 

-- Target Devices: 

-- Tool versions: 

-- Description: 

--

-- Dependencies: 

--

-- Revision: 

-- Revision 0.01 - File Created

-- Revision 0.02 - separated RX and TX clocks

-- Revision 0.03 - Added mac_tx_tfirst

-- Additional Comments: 

--

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library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

use IEEE.NUMERIC_STD.ALL;

use work.axi.all;

use work.ipv4_types.all;

use work.arp_types.all;

entity UDP_Complete_nomac is

         generic (

                        CLOCK_FREQ                      : integer := 125000000;                                                 -- freq of data_in_clk -- needed to timout cntr

                        ARP_TIMEOUT                     : integer := 60;                                                                        -- ARP response timeout (s)

                        ARP_MAX_PKT_TMO : integer := 5;                                                                 -- # wrong nwk pkts received before set error

                        MAX_ARP_ENTRIES         : integer := 255                                                                        -- max entries in the ARP store

                        );

    Port (

                        -- UDP TX signals

                        udp_tx_start                    : in std_logic;                                                 -- indicates req to tx UDP

                        udp_txi                                 : in udp_tx_type;                                                       -- UDP tx cxns

                        udp_tx_result                   : out std_logic_vector (1 downto 0);-- tx status (changes during transmission)

                        udp_tx_data_out_ready: out std_logic;                                                   -- indicates udp_tx is ready to take data

                        -- UDP RX signals

                        udp_rx_start                    : out std_logic;                                                        -- indicates receipt of udp header

                        udp_rxo                                 : out udp_rx_type;

                        -- IP RX signals

                        ip_rx_hdr                               : out ipv4_rx_header_type;

                        -- system signals

                        rx_clk                                  : in  STD_LOGIC;

                        tx_clk                                  : in  STD_LOGIC;

                        reset                                   : in  STD_LOGIC;

                        our_ip_address          : in STD_LOGIC_VECTOR (31 downto 0);

                        our_mac_address                 : in std_logic_vector (47 downto 0);

                        control                                 : in udp_control_type;

                        -- status signals

                        arp_pkt_count                   : out STD_LOGIC_VECTOR(7 downto 0);                      -- count of arp pkts received

                        ip_pkt_count                    : out STD_LOGIC_VECTOR(7 downto 0);                      -- number of IP pkts received for us

                        -- MAC Transmitter

                        mac_tx_tdata         : out  std_logic_vector(7 downto 0);        -- data byte to tx

                        mac_tx_tvalid        : out  std_logic;                                                  -- tdata is valid

                        mac_tx_tready        : in std_logic;                                                    -- mac is ready to accept data

                        mac_tx_tfirst        : out  std_logic;                                                  -- indicates first byte of frame

                        mac_tx_tlast         : out  std_logic;                                                  -- indicates last byte of frame

                        -- MAC Receiver

                        mac_rx_tdata         : in std_logic_vector(7 downto 0);  -- data byte received

                        mac_rx_tvalid        : in std_logic;                                                    -- indicates tdata is valid

                        mac_rx_tready        : out  std_logic;                                                  -- tells mac that we are ready to take data

                        mac_rx_tlast         : in std_logic                                                             -- indicates last byte of the trame

                        );

end UDP_Complete_nomac;

architecture structural of UDP_Complete_nomac is

  ------------------------------------------------------------------------------

  -- Component Declaration for UDP TX

  ------------------------------------------------------------------------------

    COMPONENT UDP_TX

    PORT(

                        -- UDP Layer signals

                        udp_tx_start                    : in std_logic;                                                 -- indicates req to tx UDP

                        udp_txi                                 : in udp_tx_type;                                                       -- UDP tx cxns

                        udp_tx_result                   : out std_logic_vector (1 downto 0);-- tx status (changes during transmission)

                        udp_tx_data_out_ready: out std_logic;                                                   -- indicates udp_tx is ready to take data

                        -- system signals

                        clk                                             : in  STD_LOGIC;                                                        -- same clock used to clock mac data and ip data

                        reset                                   : in  STD_LOGIC;

                        -- IP layer TX signals

                        ip_tx_start                             : out std_logic;

                        ip_tx                                           : out ipv4_tx_type;                                                     -- IP tx cxns

                        ip_tx_result                    : in std_logic_vector (1 downto 0);              -- tx status (changes during transmission)

                        ip_tx_data_out_ready    : in std_logic                                                                  -- indicates IP TX is ready to take data

                        );

    END COMPONENT;

  ------------------------------------------------------------------------------

  -- Component Declaration for UDP RX

  ------------------------------------------------------------------------------

    COMPONENT UDP_RX

    PORT(

                        -- UDP Layer signals

                        udp_rx_start                    : out std_logic;                                                        -- indicates receipt of udp header

                        udp_rxo                                 : out udp_rx_type;

                        -- system signals

                        clk                                             : in  STD_LOGIC;

                        reset                                   : in  STD_LOGIC;

                        -- IP layer RX signals

                        ip_rx_start                             : in std_logic;                                                 -- indicates receipt of ip header

                        ip_rx                                           : in ipv4_rx_type

                        );

    END COMPONENT;

  ------------------------------------------------------------------------------

  -- Component Declaration for the IP layer

  ------------------------------------------------------------------------------

component IP_complete_nomac

         generic (

                        CLOCK_FREQ                      : integer := 125000000;                                                 -- freq of data_in_clk -- needed to timout cntr

                        ARP_TIMEOUT                     : integer := 60;                                                                        -- ARP response timeout (s)

                        ARP_MAX_PKT_TMO : integer := 5;                                                                 -- # wrong nwk pkts received before set error

                        MAX_ARP_ENTRIES         : integer := 255                                                                        -- max entries in the ARP store

                        );

    Port (

                        -- IP Layer signals

                        ip_tx_start                             : in std_logic;

                        ip_tx                                           : in ipv4_tx_type;                                                              -- IP tx cxns

                        ip_tx_result                    : out std_logic_vector (1 downto 0);             -- tx status (changes during transmission)

                        ip_tx_data_out_ready    : out std_logic;                                                                        -- indicates IP TX is ready to take data

                        ip_rx_start                             : out std_logic;                                                                        -- indicates receipt of ip frame.

                        ip_rx                                           : out ipv4_rx_type;

                        -- system signals

                        rx_clk                                  : in  STD_LOGIC;

                        tx_clk                                  : in  STD_LOGIC;

                        reset                                   : in  STD_LOGIC;

                        our_ip_address          : in STD_LOGIC_VECTOR (31 downto 0);

                        our_mac_address                 : in std_logic_vector (47 downto 0);

                        control                                 : in ip_control_type;

                        -- status signals

                        arp_pkt_count                   : out STD_LOGIC_VECTOR(7 downto 0);                      -- count of arp pkts received

                        ip_pkt_count                    : out STD_LOGIC_VECTOR(7 downto 0);                      -- number of IP pkts received for us

                        -- MAC Transmitter

                        mac_tx_tdata         : out  std_logic_vector(7 downto 0);        -- data byte to tx

                        mac_tx_tvalid        : out  std_logic;                                                  -- tdata is valid

                        mac_tx_tready        : in std_logic;                                                    -- mac is ready to accept data

                        mac_tx_tfirst        : out  std_logic;                                                  -- indicates first byte of frame

                        mac_tx_tlast         : out  std_logic;                                                  -- indicates last byte of frame

                        -- MAC Receiver

                        mac_rx_tdata         : in std_logic_vector(7 downto 0);  -- data byte received

                        mac_rx_tvalid        : in std_logic;                                                    -- indicates tdata is valid

                        mac_rx_tready        : out  std_logic;                                                  -- tells mac that we are ready to take data

                        mac_rx_tlast         : in std_logic                                                             -- indicates last byte of the trame

                        );

end component;

        -- IP TX connectivity

   signal ip_tx_int                                             : ipv4_tx_type;

   signal ip_tx_start_int                               : std_logic;

        signal ip_tx_result_int                         : std_logic_vector (1 downto 0);

        signal ip_tx_data_out_ready_int : std_logic;

        -- IP RX connectivity

   signal ip_rx_int                     : ipv4_rx_type;

   signal ip_rx_start_int       : std_logic := '0';

begin

        -- output followers

        ip_rx_hdr <= ip_rx_int.hdr;

        -- Instantiate the UDP TX block

   udp_tx_block: UDP_TX

                        PORT MAP (

                                -- UDP Layer signals

                                udp_tx_start                    => udp_tx_start,

                                udp_txi                                         => udp_txi,

                                udp_tx_result                   => udp_tx_result,

                                udp_tx_data_out_ready=> udp_tx_data_out_ready,

                                -- system signals

                                clk                                             => tx_clk,

                                reset                                   => reset,

                                -- IP layer TX signals

                                ip_tx_start                     => ip_tx_start_int,

                                ip_tx                                   => ip_tx_int,

                                ip_tx_result                    => ip_tx_result_int,

                                ip_tx_data_out_ready    => ip_tx_data_out_ready_int

        );

        -- Instantiate the UDP RX block

   udp_rx_block: UDP_RX PORT MAP (

                                 -- UDP Layer signals

                                 udp_rxo                                => udp_rxo,

                                 udp_rx_start                   => udp_rx_start,

                                 -- system signals

                                 clk                                            => rx_clk,

                                 reset                                  => reset,

                                 -- IP layer RX signals

                                 ip_rx_start                    => ip_rx_start_int,

                                 ip_rx                                  => ip_rx_int

        );

   ------------------------------------------------------------------------------

   -- Instantiate the IP layer

   ------------------------------------------------------------------------------

    IP_block : IP_complete_nomac

                generic map (

                         CLOCK_FREQ                     => CLOCK_FREQ,

                         ARP_TIMEOUT            => ARP_TIMEOUT,

                         ARP_MAX_PKT_TMO        => ARP_MAX_PKT_TMO,

                         MAX_ARP_ENTRIES        => MAX_ARP_ENTRIES

                         )

                PORT MAP (

                                -- IP interface

                                ip_tx_start                     => ip_tx_start_int,

                                ip_tx                                   => ip_tx_int,

                                ip_tx_result                    => ip_tx_result_int,

                                ip_tx_data_out_ready    => ip_tx_data_out_ready_int,

                                ip_rx_start                     => ip_rx_start_int,

                                ip_rx                                   => ip_rx_int,

                                -- System interface

                                rx_clk                                  => rx_clk,

                                tx_clk                                  => tx_clk,

                                reset                                   => reset,

                                our_ip_address          => our_ip_address,

                                our_mac_address                 => our_mac_address,

                                control                                 => control.ip_controls,

                                -- status signals

                                arp_pkt_count                   => arp_pkt_count,

                                ip_pkt_count                    => ip_pkt_count,

                                -- MAC Transmitter

                                mac_tx_tdata                    => mac_tx_tdata,

                                mac_tx_tvalid                   => mac_tx_tvalid,

                                mac_tx_tready                   => mac_tx_tready,

                                mac_tx_tfirst                   => mac_tx_tfirst,

                                mac_tx_tlast                    => mac_tx_tlast,

                                -- MAC Receiver

                                mac_rx_tdata                    => mac_rx_tdata,

                                mac_rx_tvalid                   => mac_rx_tvalid,

                                mac_rx_tready                   => mac_rx_tready,

                                mac_rx_tlast                    => mac_rx_tlast

        );

end structural;