| Line 16... |
Line 16... |
-- 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 - fixed up setting of tx_result control defaults
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-- Revision 0.02 - fixed up setting of tx_result control defaults
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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 47... |
Line 48... |
-- MAC layer TX signals
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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_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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mac_data_out_ready : in std_logic; -- indicates system ready to consume data
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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_valid : out std_logic; -- indicates data out is valid
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mac_data_out_first : out std_logic; -- with data out valid indicates the first byte of a frame
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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_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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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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);
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);
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end IPv4_TX;
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end IPv4_TX;
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| Line 170... |
Line 172... |
ip_tx_result <= tx_result_reg;
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ip_tx_result <= tx_result_reg;
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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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arp_req_req.lookup_req <= mac_lookup_req;
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arp_req_req.lookup_req <= mac_lookup_req;
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arp_req_req.ip <= arp_req_ip_reg;
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arp_req_req.ip <= arp_req_ip_reg;
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-- set initial values for combinatorial outputs
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mac_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_ETH_HDR | SEND_IP_HDR =>
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when SEND_ETH_HDR | SEND_IP_HDR =>
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mac_data_out <= tx_data;
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mac_data_out <= tx_data;
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tx_data_valid <= mac_data_out_ready; -- generated internally
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tx_data_valid <= mac_data_out_ready; -- generated internally
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mac_data_out_last <= set_last;
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mac_data_out_last <= set_last;
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| Line 274... |
Line 279... |
set_tx_state <= '1';
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set_tx_state <= '1';
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else
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else
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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"000" => tx_data <= tx_mac (47 downto 40); -- trg = mac from ARP lookup
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when x"000" =>
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mac_data_out_first <= mac_data_out_ready;
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tx_data <= tx_mac (47 downto 40); -- trg = mac from ARP lookup
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when x"001" => tx_data <= tx_mac (39 downto 32);
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when x"001" => tx_data <= tx_mac (39 downto 32);
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when x"002" => tx_data <= tx_mac (31 downto 24);
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when x"002" => tx_data <= tx_mac (31 downto 24);
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when x"003" => tx_data <= tx_mac (23 downto 16);
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when x"003" => tx_data <= tx_mac (23 downto 16);
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when x"004" => tx_data <= tx_mac (15 downto 8);
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when x"004" => tx_data <= tx_mac (15 downto 8);
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when x"005" => tx_data <= tx_mac (7 downto 0);
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when x"005" => tx_data <= tx_mac (7 downto 0);
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| Line 381... |
Line 389... |
tx_state <= IDLE;
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tx_state <= IDLE;
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tx_count <= x"000";
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tx_count <= x"000";
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tx_result_reg <= IPTX_RESULT_NONE;
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tx_result_reg <= IPTX_RESULT_NONE;
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tx_mac <= (others => '0');
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tx_mac <= (others => '0');
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tx_mac_chn_reqd <= '0';
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tx_mac_chn_reqd <= '0';
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mac_lookup_req <= '0';
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else
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else
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-- Next tx_state processing
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-- Next tx_state processing
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if set_tx_state = '1' then
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if set_tx_state = '1' then
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tx_state <= next_tx_state;
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tx_state <= next_tx_state;
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else
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else
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