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axis_mii_tx: Don't reset lfsr 

The value of the lfsr does not matter, as long as it keeps ticking. Use
initial instead of resetting it.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
This commit is contained in:
Sean Anderson 2023-03-15 15:24:57 -04:00
parent 13ee4899a3
commit 9cdbd5f2a8
1 changed files with 2 additions and 2 deletions
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4
rtl/axis_mii_tx.v
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@ -185,6 +185,7 @@ module axis_mii_tx (
reg [9:0] lfsr, lfsr_next, backoff, backoff_next; reg [9:0] lfsr, lfsr_next, backoff, backoff_next;
reg transmit_ok_next, gave_up_next, late_collision_next; reg transmit_ok_next, gave_up_next, late_collision_next;
reg underflow_next, err, err_next; reg underflow_next, err, err_next;
initial lfsr <= 10'h3ff;
always @(*) begin always @(*) begin
mii_tx_ce_next_next_next = 0; mii_tx_ce_next_next_next = 0;
@ -516,6 +517,7 @@ module axis_mii_tx (
backoff <= backoff_next; backoff <= backoff_next;
crc_state <= crc_state_next; crc_state <= crc_state_next;
collision <= collision_next; collision <= collision_next;
lfsr <= lfsr_next;
end end
always @(posedge clk, posedge rst) begin always @(posedge clk, posedge rst) begin
@ -529,7 +531,6 @@ module axis_mii_tx (
state <= IPG_EARLY; state <= IPG_EARLY;
state_counter <= IPG_EARLY_BYTES - 1; state_counter <= IPG_EARLY_BYTES - 1;
retries <= MAX_RETRIES - 1; retries <= MAX_RETRIES - 1;
lfsr <= 10'h3ff;
transmit_ok <= 0; transmit_ok <= 0;
gave_up <= 0; gave_up <= 0;
late_collision <= 0; late_collision <= 0;
@ -548,7 +549,6 @@ module axis_mii_tx (
state <= state_next; state <= state_next;
state_counter <= state_counter_next; state_counter <= state_counter_next;
retries <= retries_next; retries <= retries_next;
lfsr <= lfsr_next;
transmit_ok <= transmit_ok_next; transmit_ok <= transmit_ok_next;
gave_up <= gave_up_next; gave_up <= gave_up_next;
late_collision <= late_collision_next; late_collision <= late_collision_next;