verilog

Difference between “parameter” and “localparam”

Generally, the idea behind the localparam (added to the Verilog-2001 standard) is to protect value of localparam from accidental or incorrect redefinition by an end-user (unlike a parameter value, this value can’t be modified by parameter redefinition or by a defparam statement). Based on IEEE 1364-2005 (ch. 4.10.2): Verilog HDL local parameters are identical to … Read more

Priority encoder in verilog

I am somewhat new to verilog, I tried running this code but it gives me an error: I think it complains about in[7:i+1] but i don’t understand why ? Can someone please advise.. EDIT ok so I am reluctant to using the X due to their numerous problems.. I was thinking of modifying the code … Read more

XOR signal in verilog

There are a couple of ways of doing this. One way could be to build a 4-input XOR module, and then instantiate multiple copies. Another way would be to use a for-loop. This won’t work with all the cases, since you don’t have an evenly-divisible number of wires. There are some other tricks (like 0-padding … Read more