| Line 13... |
Line 13... |
-- doesnt generate the checksum(supposedly optional)
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-- doesnt generate the checksum(supposedly optional)
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-- 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 abort of tx when receive last from upstream
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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 213... |
Line 214... |
udp_tx_data_out_ready <= '1'; -- in this state, we are always ready to accept user data for tx
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udp_tx_data_out_ready <= '1'; -- in this state, we are always ready to accept user data for tx
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if ip_tx_data_out_ready = '1' then
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if ip_tx_data_out_ready = '1' then
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if udp_txi.data.data_out_valid = '1' or tx_count = x"000" then
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if udp_txi.data.data_out_valid = '1' or tx_count = x"000" then
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-- only increment if ready and valid has been subsequently established, otherwise data count moves on too fast
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-- only increment if ready and valid has been subsequently established, otherwise data count moves on too fast
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if unsigned(tx_count) = unsigned(udp_txi.hdr.data_length) then
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if unsigned(tx_count) = unsigned(udp_txi.hdr.data_length) then
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-- TX terminated due to count - end normally
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set_last <= '1';
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set_last <= '1';
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tx_data <= udp_txi.data.data_out;
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tx_data <= udp_txi.data.data_out;
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next_tx_result <= UDPTX_RESULT_SENT;
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next_tx_result <= UDPTX_RESULT_SENT;
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set_ip_tx_start <= CLR;
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set_ip_tx_start <= CLR;
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set_tx_result <= '1';
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set_tx_result <= '1';
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next_tx_state <= IDLE;
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next_tx_state <= IDLE;
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set_tx_state <= '1';
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set_tx_state <= '1';
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elsif udp_txi.data.data_out_last = '1' then
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-- terminate tx with error as got last from upstream before exhausting count
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set_last <= '1';
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tx_data <= udp_txi.data.data_out;
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next_tx_result <= UDPTX_RESULT_ERR;
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set_ip_tx_start <= CLR;
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set_tx_result <= '1';
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next_tx_state <= IDLE;
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set_tx_state <= '1';
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else
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else
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-- TX continues
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tx_count_mode <= INCR;
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tx_count_mode <= INCR;
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tx_data <= udp_txi.data.data_out;
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tx_data <= udp_txi.data.data_out;
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end if;
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end if;
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end if;
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end if;
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end if;
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end if;
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