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----------------------------------------------------------------------------------
----------------------------------------------------------------------------------
-- Company: 
-- Company: 
-- Engineer: 
-- Engineer: 
-- 
-- 
-- Create Date:    12:43:16 06/04/2011 
-- Create Date:    12:43:16 06/04/2011 
-- Design Name: 
-- Design Name: 
-- Module Name:    IP_complete_nomac - Behavioral 
-- Module Name:    IP_complete_nomac - Behavioral 
-- Project Name: 
-- Project Name: 
-- Target Devices: 
-- Target Devices: 
-- Tool versions: 
-- Tool versions: 
-- Description: Implements complete IP stack with ARP (but no MAC)
-- Description: Implements complete IP stack with ARP (but no MAC)
--
--
-- Dependencies: 
-- Dependencies: 
--
--
-- Revision: 
-- Revision: 
-- Revision 0.01 - File Created
-- Revision 0.01 - File Created
-- Revision 0.02 - separated RX and TX clocks
-- Revision 0.02 - separated RX and TX clocks
-- Revision 0.03 - Added mac_tx_tfirst
-- Revision 0.03 - Added mac_tx_tfirst
-- Additional Comments: 
-- Additional Comments: 
--
--
----------------------------------------------------------------------------------
----------------------------------------------------------------------------------
LIBRARY ieee;
LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
USE ieee.std_logic_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
use IEEE.NUMERIC_STD.ALL;
use work.axi.all;
use work.axi.all;
use work.ipv4_types.all;
use work.ipv4_types.all;
use work.arp_types.all;
use work.arp_types.all;
 
 
entity IP_complete_nomac is
entity IP_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)
 
                        );
    Port (
    Port (
                        -- IP Layer signals
                        -- IP Layer signals
                        ip_tx_start                             : in std_logic;
                        ip_tx_start                             : in std_logic;
                        ip_tx                                           : in ipv4_tx_type;                                                              -- IP tx cxns
                        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_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_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_start                             : out std_logic;                                                                        -- indicates receipt of ip frame.
                        ip_rx                                           : out ipv4_rx_type;
                        ip_rx                                           : out ipv4_rx_type;
                        -- system signals
                        -- system signals
                        rx_clk                                  : in  STD_LOGIC;
                        rx_clk                                  : in  STD_LOGIC;
                        tx_clk                                  : in  STD_LOGIC;
                        tx_clk                                  : in  STD_LOGIC;
                        reset                                   : in  STD_LOGIC;
                        reset                                   : in  STD_LOGIC;
                        our_ip_address          : in STD_LOGIC_VECTOR (31 downto 0);
                        our_ip_address          : in STD_LOGIC_VECTOR (31 downto 0);
                        our_mac_address                 : in std_logic_vector (47 downto 0);
                        our_mac_address                 : in std_logic_vector (47 downto 0);
 
                        control                                 : in ip_control_type;
                        -- status signals
                        -- status signals
                        arp_pkt_count                   : out STD_LOGIC_VECTOR(7 downto 0);                      -- count of arp pkts received
                        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
                        ip_pkt_count                    : out STD_LOGIC_VECTOR(7 downto 0);                      -- number of IP pkts received for us
                        -- MAC Transmitter
                        -- MAC Transmitter
                        mac_tx_tdata         : out  std_logic_vector(7 downto 0);        -- data byte to tx
                        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_tvalid        : out  std_logic;                                                  -- tdata is valid
                        mac_tx_tready        : in std_logic;                                                    -- mac is ready to accept data
                        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_tfirst        : out  std_logic;                                                  -- indicates first byte of frame
                        mac_tx_tlast         : out  std_logic;                                                  -- indicates last byte of frame
                        mac_tx_tlast         : out  std_logic;                                                  -- indicates last byte of frame
                        -- MAC Receiver
                        -- MAC Receiver
                        mac_rx_tdata         : in std_logic_vector(7 downto 0);  -- data byte received
                        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_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_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
                        mac_rx_tlast         : in std_logic                                                             -- indicates last byte of the trame
                        );
                        );
end IP_complete_nomac;
end IP_complete_nomac;
 
 
architecture structural of IP_complete_nomac is
architecture structural of IP_complete_nomac is
 
 
    COMPONENT IPv4
    COMPONENT IPv4
    PORT(
    PORT(
                        -- IP Layer signals
                        -- IP Layer signals
                        ip_tx_start                             : in std_logic;
                        ip_tx_start                             : in std_logic;
                        ip_tx                                           : in ipv4_tx_type;                                                              -- IP tx cxns
                        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_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_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_start                             : out std_logic;                                                                        -- indicates receipt of ip frame.
                        ip_rx                                           : out ipv4_rx_type;
                        ip_rx                                           : out ipv4_rx_type;
                        -- system control signals
                        -- system control signals
                        rx_clk                                  : in  STD_LOGIC;
                        rx_clk                                  : in  STD_LOGIC;
                        tx_clk                                  : in  STD_LOGIC;
                        tx_clk                                  : in  STD_LOGIC;
                        reset                                   : in  STD_LOGIC;
                        reset                                   : in  STD_LOGIC;
                        our_ip_address          : in STD_LOGIC_VECTOR (31 downto 0);
                        our_ip_address          : in STD_LOGIC_VECTOR (31 downto 0);
                        our_mac_address                 : in std_logic_vector (47 downto 0);
                        our_mac_address                 : in std_logic_vector (47 downto 0);
                        -- system status signals
                        -- system status signals
                        rx_pkt_count                    : out STD_LOGIC_VECTOR(7 downto 0);                      -- number of IP pkts received for us
                        rx_pkt_count                    : out STD_LOGIC_VECTOR(7 downto 0);                      -- number of IP pkts received for us
                        -- ARP lookup signals
                        -- ARP lookup signals
                        arp_req_req                             : out arp_req_req_type;
                        arp_req_req                             : out arp_req_req_type;
                        arp_req_rslt                    : in arp_req_rslt_type;
                        arp_req_rslt                    : in arp_req_rslt_type;
                        -- MAC layer RX signals
                        -- MAC layer RX signals
                        mac_data_in                     : in  STD_LOGIC_VECTOR (7 downto 0);             -- ethernet frame (from dst mac addr through to last byte of frame)
                        mac_data_in                     : in  STD_LOGIC_VECTOR (7 downto 0);             -- ethernet frame (from dst mac addr through to last byte of frame)
                        mac_data_in_valid       : in  STD_LOGIC;                                                                        -- indicates data_in valid on clock
                        mac_data_in_valid       : in  STD_LOGIC;                                                                        -- indicates data_in valid on clock
                        mac_data_in_last                : in  STD_LOGIC;                                                                        -- indicates last data in frame
                        mac_data_in_last                : in  STD_LOGIC;                                                                        -- indicates last data in frame
                        -- MAC layer TX signals
                        -- MAC layer TX signals
                        mac_tx_req                              : out std_logic;                                                                        -- indicates that ip wants access to channel (stays up for as long as tx)
                        mac_tx_req                              : out std_logic;                                                                        -- indicates that ip wants access to channel (stays up for as long as tx)
                        mac_tx_granted                  : in std_logic;                                                                 -- indicates that access to channel has been granted            
                        mac_tx_granted                  : in std_logic;                                                                 -- indicates that access to channel has been granted            
                        mac_data_out_ready      : in std_logic;                                                                 -- indicates system ready to consume data
                        mac_data_out_ready      : in std_logic;                                                                 -- indicates system ready to consume data
                        mac_data_out_valid      : out std_logic;                                                                        -- indicates data out is valid
                        mac_data_out_valid      : out std_logic;                                                                        -- indicates data out is valid
                        mac_data_out_first      : out std_logic;                                                                        -- with data out valid indicates the first byte of a frame
                        mac_data_out_first      : out std_logic;                                                                        -- with data out valid indicates the first byte of a frame
                        mac_data_out_last               : out std_logic;                                                                        -- with data out valid indicates the last byte of a frame
                        mac_data_out_last               : out std_logic;                                                                        -- with data out valid indicates the last byte of a frame
                        mac_data_out                    : out std_logic_vector (7 downto 0)                      -- ethernet frame (from dst mac addr through to last byte of frame)      
                        mac_data_out                    : out std_logic_vector (7 downto 0)                      -- ethernet frame (from dst mac addr through to last byte of frame)      
         );
         );
         END COMPONENT;
         END COMPONENT;
 
 
    COMPONENT arp
    COMPONENT arp
    PORT(
         generic (
 
                        CLOCK_FREQ                      : integer := 125000000;                                                 -- freq of data_in_clk -- needed to timout cntr
 
                        ARP_TIMEOUT                     : integer := 60                                                                 -- ARP response timeout (s)
 
                        );
 
    Port (
                        -- lookup request signals
                        -- lookup request signals
                        arp_req_req                     : in arp_req_req_type;
                        arp_req_req                     : in arp_req_req_type;
                        arp_req_rslt            : out arp_req_rslt_type;
                        arp_req_rslt            : out arp_req_rslt_type;
                        -- MAC layer RX signals
                        -- MAC layer RX signals
                        data_in_clk             : in  STD_LOGIC;
                        data_in_clk             : in  STD_LOGIC;
                        reset                           : in  STD_LOGIC;
                        reset                           : in  STD_LOGIC;
                        data_in                                 : in  STD_LOGIC_VECTOR (7 downto 0);             -- ethernet frame (from dst mac addr through to last byte of frame)
                        data_in                                 : in  STD_LOGIC_VECTOR (7 downto 0);             -- ethernet frame (from dst mac addr through to last byte of frame)
                        data_in_valid           : in  STD_LOGIC;                                                                        -- indicates data_in valid on clock
                        data_in_valid           : in  STD_LOGIC;                                                                        -- indicates data_in valid on clock
                        data_in_last            : in  STD_LOGIC;                                                                        -- indicates last data in frame
                        data_in_last            : in  STD_LOGIC;                                                                        -- indicates last data in frame
                        -- MAC layer TX signals
                        -- MAC layer TX signals
                        mac_tx_req                      : out std_logic;                                                                        -- indicates that ip wants access to channel (stays up for as long as tx)
                        mac_tx_req                      : out std_logic;                                                                        -- indicates that ip wants access to channel (stays up for as long as tx)
                        mac_tx_granted          : in std_logic;                                                                 -- indicates that access to channel has been granted            
                        mac_tx_granted          : in std_logic;                                                                 -- indicates that access to channel has been granted            
                        data_out_clk            : in std_logic;
                        data_out_clk            : in std_logic;
                        data_out_ready          : in std_logic;                                                                 -- indicates system ready to consume data
                        data_out_ready          : in std_logic;                                                                 -- indicates system ready to consume data
                        data_out_valid          : out std_logic;                                                                        -- indicates data out is valid
                        data_out_valid          : out std_logic;                                                                        -- indicates data out is valid
                        data_out_first          : out std_logic;                                                                        -- with data out valid indicates the first byte of a frame
                        data_out_first          : out std_logic;                                                                        -- with data out valid indicates the first byte of a frame
                        data_out_last           : out std_logic;                                                                        -- with data out valid indicates the last byte of a frame
                        data_out_last           : out std_logic;                                                                        -- with data out valid indicates the last byte of a frame
                        data_out                                : out std_logic_vector (7 downto 0);             -- ethernet frame (from dst mac addr through to last byte of frame)
                        data_out                                : out std_logic_vector (7 downto 0);             -- ethernet frame (from dst mac addr through to last byte of frame)
                        -- system signals
                        -- system signals
                        our_mac_address         : in STD_LOGIC_VECTOR (47 downto 0);
                        our_mac_address         : in STD_LOGIC_VECTOR (47 downto 0);
                        our_ip_address  : in STD_LOGIC_VECTOR (31 downto 0);
                        our_ip_address  : in STD_LOGIC_VECTOR (31 downto 0);
 
                        control                         : in arp_control_type;
                        req_count                       : out STD_LOGIC_VECTOR(7 downto 0)                       -- count of arp pkts received
                        req_count                       : out STD_LOGIC_VECTOR(7 downto 0)                       -- count of arp pkts received
         );
                        );
         END COMPONENT;
         END COMPONENT;
 
 
    COMPONENT tx_arbitrator
    COMPONENT tx_arbitrator
    PORT(
    PORT(
                clk                             : in std_logic;
                clk                             : in std_logic;
                reset                           : in std_logic;
                reset                           : in std_logic;
 
 
                req_1                           : in  std_logic;
                req_1                           : in  std_logic;
                grant_1                 : out std_logic;
                grant_1                 : out std_logic;
      data_1         : in  std_logic_vector(7 downto 0); -- data byte to tx
      data_1         : in  std_logic_vector(7 downto 0); -- data byte to tx
      valid_1        : in  std_logic;                                                   -- tdata is valid
      valid_1        : in  std_logic;                                                   -- tdata is valid
      first_1        : in  std_logic;                                                   -- indicates first byte of frame
      first_1        : in  std_logic;                                                   -- indicates first byte of frame
      last_1         : in  std_logic;                                                   -- indicates last byte of frame
      last_1         : in  std_logic;                                                   -- indicates last byte of frame
 
 
                req_2                           : in  std_logic;
                req_2                           : in  std_logic;
                grant_2                 : out std_logic;
                grant_2                 : out std_logic;
      data_2         : in  std_logic_vector(7 downto 0); -- data byte to tx
      data_2         : in  std_logic_vector(7 downto 0); -- data byte to tx
      valid_2        : in  std_logic;                                                   -- tdata is valid
      valid_2        : in  std_logic;                                                   -- tdata is valid
      first_2        : in  std_logic;                                                   -- indicates first byte of frame
      first_2        : in  std_logic;                                                   -- indicates first byte of frame
      last_2         : in  std_logic;                                                   -- indicates last byte of frame
      last_2         : in  std_logic;                                                   -- indicates last byte of frame
 
 
      data              : out  std_logic_vector(7 downto 0);     -- data byte to tx
      data              : out  std_logic_vector(7 downto 0);     -- data byte to tx
      valid             : out  std_logic;                                                       -- tdata is valid
      valid             : out  std_logic;                                                       -- tdata is valid
      first             : out  std_logic;                                                       -- indicates first byte of frame
      first             : out  std_logic;                                                       -- indicates first byte of frame
      last              : out  std_logic                                                        -- indicates last byte of frame
      last              : out  std_logic                                                        -- indicates last byte of frame
         );
         );
         END COMPONENT;
         END COMPONENT;
 
 
        ---------------------------
        ---------------------------
        -- Signals
        -- Signals
        ---------------------------
        ---------------------------
 
 
        -- ARP REQUEST
        -- ARP REQUEST
        signal arp_req_req_int          : arp_req_req_type;
        signal arp_req_req_int          : arp_req_req_type;
        signal arp_req_rslt_int         : arp_req_rslt_type;
        signal arp_req_rslt_int         : arp_req_rslt_type;
        -- MAC arbitration busses
        -- MAC arbitration busses
        signal ip_mac_req                               : std_logic;
        signal ip_mac_req                               : std_logic;
        signal ip_mac_grant                     : std_logic;
        signal ip_mac_grant                     : std_logic;
        signal ip_mac_data_out          : std_logic_vector (7 downto 0);
        signal ip_mac_data_out          : std_logic_vector (7 downto 0);
        signal ip_mac_valid                     : std_logic;
        signal ip_mac_valid                     : std_logic;
        signal ip_mac_first                     : std_logic;
        signal ip_mac_first                     : std_logic;
        signal ip_mac_last                      : std_logic;
        signal ip_mac_last                      : std_logic;
        signal arp_mac_req                      : std_logic;
        signal arp_mac_req                      : std_logic;
        signal arp_mac_grant                    : std_logic;
        signal arp_mac_grant                    : std_logic;
        signal arp_mac_data_out         : std_logic_vector (7 downto 0);
        signal arp_mac_data_out         : std_logic_vector (7 downto 0);
        signal arp_mac_valid                    : std_logic;
        signal arp_mac_valid                    : std_logic;
        signal arp_mac_first                    : std_logic;
        signal arp_mac_first                    : std_logic;
        signal arp_mac_last                     : std_logic;
        signal arp_mac_last                     : std_logic;
        -- MAC RX bus
        -- MAC RX bus
        signal mac_rx_tready_int        : std_logic;
        signal mac_rx_tready_int        : std_logic;
        -- MAC TX bus
        -- MAC TX bus
        signal mac_tx_tdata_int         : std_logic_vector (7 downto 0);
        signal mac_tx_tdata_int         : std_logic_vector (7 downto 0);
        signal mac_tx_tvalid_int        : std_logic;
        signal mac_tx_tvalid_int        : std_logic;
        signal mac_tx_tfirst_int        : std_logic;
        signal mac_tx_tfirst_int        : std_logic;
        signal mac_tx_tlast_int         : std_logic;
        signal mac_tx_tlast_int         : std_logic;
        -- control signals
        -- control signals
        signal mac_tx_granted_int       : std_logic;
        signal mac_tx_granted_int       : std_logic;
 
 
begin
begin
 
 
        mac_rx_tready_int <= '1';               -- enable the mac receiver
        mac_rx_tready_int <= '1';               -- enable the mac receiver
 
 
        -- set followers
        -- set followers
        mac_tx_tdata <= mac_tx_tdata_int;
        mac_tx_tdata <= mac_tx_tdata_int;
        mac_tx_tvalid <= mac_tx_tvalid_int;
        mac_tx_tvalid <= mac_tx_tvalid_int;
        mac_tx_tfirst <= mac_tx_tfirst_int;
        mac_tx_tfirst <= mac_tx_tfirst_int;
        mac_tx_tlast <= mac_tx_tlast_int;
        mac_tx_tlast <= mac_tx_tlast_int;
 
 
        mac_rx_tready <= mac_rx_tready_int;
        mac_rx_tready <= mac_rx_tready_int;
 
 
   ------------------------------------------------------------------------------
   ------------------------------------------------------------------------------
   -- Instantiate the IP layer
   -- Instantiate the IP layer
   ------------------------------------------------------------------------------
   ------------------------------------------------------------------------------
 
 
    IP_layer : IPv4 PORT MAP
    IP_layer : IPv4 PORT MAP
                (
                (
          ip_tx_start                   => ip_tx_start,
          ip_tx_start                   => ip_tx_start,
          ip_tx                                         => ip_tx,
          ip_tx                                         => ip_tx,
          ip_tx_result                  => ip_tx_result,
          ip_tx_result                  => ip_tx_result,
          ip_tx_data_out_ready=> ip_tx_data_out_ready,
          ip_tx_data_out_ready=> ip_tx_data_out_ready,
          ip_rx_start                   => ip_rx_start,
          ip_rx_start                   => ip_rx_start,
          ip_rx                                         => ip_rx,
          ip_rx                                         => ip_rx,
          rx_clk                                        => rx_clk,
          rx_clk                                        => rx_clk,
          tx_clk                                        => tx_clk,
          tx_clk                                        => tx_clk,
          reset                                         => reset,
          reset                                         => reset,
          our_ip_address                => our_ip_address,
          our_ip_address                => our_ip_address,
          our_mac_address               => our_mac_address,
          our_mac_address               => our_mac_address,
                         rx_pkt_count                   => ip_pkt_count,
                         rx_pkt_count                   => ip_pkt_count,
          arp_req_req                   => arp_req_req_int,
          arp_req_req                   => arp_req_req_int,
          arp_req_rslt                  => arp_req_rslt_int,
          arp_req_rslt                  => arp_req_rslt_int,
          mac_tx_req                    => ip_mac_req,
          mac_tx_req                    => ip_mac_req,
          mac_tx_granted                => ip_mac_grant,
          mac_tx_granted                => ip_mac_grant,
          mac_data_out_ready    => mac_tx_tready,
          mac_data_out_ready    => mac_tx_tready,
          mac_data_out_valid    => ip_mac_valid,
          mac_data_out_valid    => ip_mac_valid,
                         mac_data_out_first     => ip_mac_first,
                         mac_data_out_first     => ip_mac_first,
          mac_data_out_last     => ip_mac_last,
          mac_data_out_last     => ip_mac_last,
          mac_data_out                  => ip_mac_data_out,
          mac_data_out                  => ip_mac_data_out,
          mac_data_in                   => mac_rx_tdata,
          mac_data_in                   => mac_rx_tdata,
          mac_data_in_valid     => mac_rx_tvalid,
          mac_data_in_valid     => mac_rx_tvalid,
          mac_data_in_last      => mac_rx_tlast
          mac_data_in_last      => mac_rx_tlast
        );
        );
 
 
   ------------------------------------------------------------------------------
   ------------------------------------------------------------------------------
   -- Instantiate the ARP layer
   -- Instantiate the ARP layer
   ------------------------------------------------------------------------------
   ------------------------------------------------------------------------------
        arp_layer : arp
        arp_layer : arp
 
                        generic map (
 
                         CLOCK_FREQ                     => CLOCK_FREQ,
 
                         ARP_TIMEOUT            => ARP_TIMEOUT
 
                         )
                 Port map(
                 Port map(
                        -- request signals
                        -- request signals
                          arp_req_req                                   => arp_req_req_int,
                          arp_req_req                                   => arp_req_req_int,
                          arp_req_rslt                                  => arp_req_rslt_int,
                          arp_req_rslt                                  => arp_req_rslt_int,
                          -- rx signals
                          -- rx signals
                          data_in_clk                   => rx_clk,
                          data_in_clk                   => rx_clk,
                          reset                         => reset,
                          reset                         => reset,
                          data_in                       => mac_rx_tdata,
                          data_in                       => mac_rx_tdata,
                          data_in_valid                 => mac_rx_tvalid,
                          data_in_valid                 => mac_rx_tvalid,
                          data_in_last                  => mac_rx_tlast,
                          data_in_last                  => mac_rx_tlast,
                          -- tx signals
                          -- tx signals
                          mac_tx_req                                    => arp_mac_req,
                          mac_tx_req                                    => arp_mac_req,
                          mac_tx_granted                                => arp_mac_grant,
                          mac_tx_granted                                => arp_mac_grant,
                          data_out_clk                                  => tx_clk,
                          data_out_clk                                  => tx_clk,
                          data_out_ready                                => mac_tx_tready,
                          data_out_ready                                => mac_tx_tready,
                          data_out_valid                                => arp_mac_valid,
                          data_out_valid                                => arp_mac_valid,
                          data_out_first                                => arp_mac_first,
                          data_out_first                                => arp_mac_first,
                          data_out_last                         => arp_mac_last,
                          data_out_last                         => arp_mac_last,
                          data_out                                              => arp_mac_data_out,
                          data_out                                              => arp_mac_data_out,
                          -- system signals
                          -- system signals
                          our_mac_address                               => our_mac_address,
                          our_mac_address                               => our_mac_address,
                          our_ip_address                                => our_ip_address,
                          our_ip_address                                => our_ip_address,
 
                          control                                               => control.arp_controls,
                          req_count                                             => arp_pkt_count
                          req_count                                             => arp_pkt_count
                          );
                          );
 
 
 
 
   ------------------------------------------------------------------------------
   ------------------------------------------------------------------------------
   -- Instantiate the TX Arbitrator 
   -- Instantiate the TX Arbitrator 
   ------------------------------------------------------------------------------
   ------------------------------------------------------------------------------
        mac_tx_arb : tx_arbitrator
        mac_tx_arb : tx_arbitrator
                 Port map(
                 Port map(
                                clk                                             => tx_clk,
                                clk                                             => tx_clk,
                                reset                           => reset,
                                reset                           => reset,
 
 
                                req_1                                                   => ip_mac_req,
                                req_1                                                   => ip_mac_req,
                                grant_1                                         => ip_mac_grant,
                                grant_1                                         => ip_mac_grant,
                                data_1                          => ip_mac_data_out,
                                data_1                          => ip_mac_data_out,
                                valid_1                         => ip_mac_valid,
                                valid_1                         => ip_mac_valid,
                                first_1                                         => ip_mac_first,
                                first_1                                         => ip_mac_first,
                                last_1                                          => ip_mac_last,
                                last_1                                          => ip_mac_last,
 
 
                                req_2                                                   => arp_mac_req,
                                req_2                                                   => arp_mac_req,
                                grant_2                                         => arp_mac_grant,
                                grant_2                                         => arp_mac_grant,
                                data_2                          => arp_mac_data_out,
                                data_2                          => arp_mac_data_out,
                                valid_2                         => arp_mac_valid,
                                valid_2                         => arp_mac_valid,
                                first_2                                         => arp_mac_first,
                                first_2                                         => arp_mac_first,
                                last_2                                          => arp_mac_last,
                                last_2                                          => arp_mac_last,
 
 
                                data                                    => mac_tx_tdata_int,
                                data                                    => mac_tx_tdata_int,
                                valid                                   => mac_tx_tvalid_int,
                                valid                                   => mac_tx_tvalid_int,
                                first                                   => mac_tx_tfirst_int,
                                first                                   => mac_tx_tfirst_int,
                                last                                    => mac_tx_tlast_int
                                last                                    => mac_tx_tlast_int
                          );
                          );
 
 
end structural;
end structural;
 
 
 
 

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