Re: [myhdl-list] delta cycles

[Jan D. <ja...@ja...>]

On 04/24/2012 04:06 AM, Christopher Felton wrote:
> On 4/23/12 5:39 AM, Jan Decaluwe wrote:

>>
>> If it is really a problem, I think the best way would be
>> solve it a the waveform viewer level, e.g. by moving
>> a clock trace backwards a little. But I am thinking
>> aloud, don't know if there are waveform viewers that
>> can do this.
>   >
>   >  Jan
>
> I am not aware of any viewer that allows the clock (or any signal) to
> shifted slightly.  But this does seem to be a common problem with other
> designers / students I have run across.
>
> ... (15 minutes elapse)
>
> But then I decided to poke around GTKwave.  And it looks like you can
> use the "time warp" feature to do this.  I simply selected a signal
> (clk) and the used the "Edit->Time Warp->Warp Marked" and then typed in
> "-1 ns" and the clk signal was shifted to the left 1ns.

Good catch! I had also searched for this but didn't find it
readily. After warping, you can then use 'Pattern Search' to
mark rising edges; it creates markers that run over the whole
waveform viewer window.

-- 
Jan Decaluwe - Resources bvba - http://www.jandecaluwe.com
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