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Handle tlast on first cycle

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This commit is contained in:
Alex Forencich 2015-03-03 21:46:02 -08:00
parent 43999fb360
commit 23fa1f1207
1 changed files with 20 additions and 1 deletions
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21
rtl/axis_eth_fcs_insert.v
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@ -133,7 +133,25 @@ always @* begin
frame_ptr_next = 1; frame_ptr_next = 1;
reset_crc = 0; reset_crc = 0;
update_crc = 1; update_crc = 1;
state_next = STATE_PAYLOAD; if (input_axis_tlast) begin
if (input_axis_tuser) begin
output_axis_tlast_int = 1;
output_axis_tuser_int = 1;
reset_crc = 1;
frame_ptr_next = 0;
state_next = STATE_IDLE;
end else begin
input_axis_tready_next = 0;
if (ENABLE_PADDING && frame_ptr_reg < MIN_FRAME_LENGTH-5) begin
state_next = STATE_PAD;
end else begin
frame_ptr_next = 0;
state_next = STATE_FCS;
end
end
end else begin
state_next = STATE_PAYLOAD;
end
end else begin end else begin
state_next = STATE_IDLE; state_next = STATE_IDLE;
end end
@ -155,6 +173,7 @@ always @* begin
output_axis_tlast_int = 1; output_axis_tlast_int = 1;
output_axis_tuser_int = 1; output_axis_tuser_int = 1;
reset_crc = 1; reset_crc = 1;
frame_ptr_next = 0;
state_next = STATE_IDLE; state_next = STATE_IDLE;
end else begin end else begin
input_axis_tready_next = 0; input_axis_tready_next = 0;