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It would help us greatly if you showed a small example code with the exact error message you are getting. Also, does the file have a *.sv filename?
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Here is the relevant portion of my code, with an attempt to make the reset_n port optional by means of giving it a default value. Following the code, I am posting the error message.
module ncntupdn
(
input [N-1:0]data_in,
input reset_n = 1,
input load,
input up,
input enp,
input clk,
output reg [N-1:0]count,
output wire rco_n,
output wire xrco_n // Acts just like rco_n except it is not disabled by enp going low
);
parameter N = 4;
Error (10231): Verilog HDL error at
ncntupdn.sv(10): value cannot be assigned to input "reset_n"
BTW, it didn't make any difference if the file was .v or .sv. Thanks for any advice.
Honored Contributor
