Can an operation expression be used as the VPI callback obje

[abc]

I tried to write a VPI callback which was called when the value was
changed. It works when the callback object is not operation.

initial $monitor(a); // It works

initial $monitor(a !== 3'b010); // It can't register the callback

Can an operation expression be used as the callback object?

Thanks,

 

[abc]

Swapnajit Mittra wrote:

abc <abc@yahoo.com> wrote in message news:<RAAUc.84$euc.23@news04.bloor.is.net.cable.rogers.com>...

I tried to write a VPI callback which was called when the value was
changed. It works when the callback object is not operation.

initial $monitor(a); // It works

initial $monitor(a !== 3'b010); // It can't register the callback

Can an operation expression be used as the callback object?

Thanks,


Have you tried the following?

wire flag;
assign flag = (a !== 3'b010);

initial $monitor(flag);

It works using a temporary variable. But it requires to define an
additional variable. Is it impossible to attach a value change callback
on an operational expression such as (a !== 3'b010)?

Thanks,

- Swapnajit.
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