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Line 20... |
-- Dependencies:
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-- Dependencies:
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--
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--
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-- Revision:
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-- Revision:
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-- Revision 0.01 - File Created
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-- Revision 0.01 - File Created
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-- Revision 0.02 - Added req for mac tx and wait for grant
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-- Revision 0.02 - Added req for mac tx and wait for grant
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-- Revision 0.03 - Added data_out_first
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-- Additional Comments:
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-- Additional Comments:
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--
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--
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----------------------------------------------------------------------------------
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----------------------------------------------------------------------------------
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library IEEE;
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library IEEE;
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use IEEE.STD_LOGIC_1164.ALL;
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use IEEE.STD_LOGIC_1164.ALL;
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| Line 45... |
Line 47... |
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_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_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_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_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_valid : out std_logic; -- indicates data out is valid
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data_out_first : out std_logic; -- with data out valid indicates the first byte of a frame
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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_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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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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-- system signals
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our_mac_address : in STD_LOGIC_VECTOR (47 downto 0);
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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);
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our_ip_address : in STD_LOGIC_VECTOR (31 downto 0);
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| Line 553... |
Line 556... |
set_chn_reqd, clear_reply_req)
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set_chn_reqd, clear_reply_req)
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begin
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begin
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-- set output followers
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-- set output followers
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mac_tx_req <= tx_mac_chn_reqd;
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mac_tx_req <= tx_mac_chn_reqd;
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-- set initial values for combinatorial outputs
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data_out_first <= '0';
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case tx_state is
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case tx_state is
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when SEND =>
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when SEND =>
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if data_out_ready = '1' and kill_data_out_valid = '0' then
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if data_out_ready = '1' and kill_data_out_valid = '0' then
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data_out_valid <= '1';
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data_out_valid <= '1';
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else
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else
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Line 608... |
when SEND =>
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when SEND =>
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if data_out_ready = '1' then
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if data_out_ready = '1' then
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tx_count_mode <= INCR;
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tx_count_mode <= INCR;
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end if;
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end if;
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case tx_count is
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case tx_count is
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when x"00" => data_out <= x"ff"; -- dst = broadcast
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when x"00" =>
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data_out_first <= data_out_ready;
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data_out <= x"ff"; -- dst = broadcast
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when x"01" => data_out <= x"ff";
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when x"01" => data_out <= x"ff";
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when x"02" => data_out <= x"ff";
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when x"02" => data_out <= x"ff";
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when x"03" => data_out <= x"ff";
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when x"03" => data_out <= x"ff";
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when x"04" => data_out <= x"ff";
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when x"04" => data_out <= x"ff";
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when x"05" => data_out <= x"ff";
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when x"05" => data_out <= x"ff";
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