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Add a parameter to control the polarity of reset

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Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
This commit is contained in:
Anton Blanchard 2020-02-02 09:02:33 +11:00 committed by Anton Blanchard
parent fb166bbfae
commit df3a74798e
1 changed files with 4 additions and 2 deletions
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6
toplevel.v
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@ -1,4 +1,6 @@
module toplevel(
module toplevel #(
parameter RESET_LOW = 1
) (
input clock,
input reset,
output io_tx,
@ -32,7 +34,7 @@ reg [21:0] cnt = ~0;
always@(posedge clock)
begin
if (~lock || ~reset)
if (~lock || (reset ^ RESET_LOW))
begin
cnt <= ~0;
end