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https://opencores.org/ocsvn/udp_ip_stack/udp_ip_stack/trunk
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| Rev 8 |
Rev 10 |
| Line 365... |
Line 365... |
ip_tx_data_out_ready <= mac_data_out_ready and mac_data_out_ready_reg; -- in this state, we are always ready to accept user data for tx
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ip_tx_data_out_ready <= mac_data_out_ready and mac_data_out_ready_reg; -- in this state, we are always ready to accept user data for tx
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if mac_data_out_ready = '1' then
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if mac_data_out_ready = '1' then
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if ip_tx.data.data_out_valid = '1' or tx_count = x"000" then
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if ip_tx.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(ip_tx.hdr.data_length) then
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if unsigned(tx_count) = unsigned(ip_tx.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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set_chn_reqd <= CLR;
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set_chn_reqd <= CLR;
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tx_data <= ip_tx.data.data_out;
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tx_data <= ip_tx.data.data_out;
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next_tx_result <= IPTX_RESULT_SENT;
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next_tx_result <= IPTX_RESULT_SENT;
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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 ip_tx.data.data_out_last = '1' then
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-- TX terminated due to receiving last indication from upstream - end with error
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set_last <= '1';
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set_chn_reqd <= CLR;
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tx_data <= ip_tx.data.data_out;
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next_tx_result <= IPTX_RESULT_ERR;
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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 <= ip_tx.data.data_out;
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tx_data <= ip_tx.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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