Simulation and Verification

[awillen]

Is there a concise way to enter a bitvector of a given length in the ISim Tcl console? For example, I have a 128 bit signal "foo" and want to assign the value 0 to it:

put foo 0

doesn't work, because "0" (1 bit) doesn't match the size of the signal (128 bit). In a perfect world, I could do this:

put foo 128'b0

but that doesn't work either. Obviously, writing 128 zeroes is out of the question, so does there exist a simple solution, or do I have to write a function which takes a value and a length myself?

[awillen]

Nevermind, I found a solution:

put foo 0 -radix hex

(or oct – bin and dec don't work)

[gszakacs]

put foo 0

works for me.  Are you using Verilog?

The strange thing I see (and maybe I don't understand how "put" really works) is that

whatever I put in foo shows up in the object window, but not in the wave window.  But

I don't get a size mismatch problem and whatever I type gets zero-extended to fill

the entire 128 bits.  There is mention in the ISIM manual that the "put" command uses

the radix.  I have my default radix set to hexadecimal.  Don't know if that has anything

to do with it.

Regards,

Gabor

[awillen]

Yes, I'm using Verilog. My default radix setting was at binary; I've set it to hexadecimal now and the put command works without the -radix option. Thanks for the hint!

Edit: by the way, the value in the wave window is updated as soon as you select the signal.

Adrian