[Open-graphics] How we compute video clocks

[Michael Meeuwisse]

On 5 Mar 2008, at 19:47, Timothy Normand Miller wrote:

> On 3/5/08, Michael Meeuwisse <mickeymeeuw at gmail.com> wrote:
>
>>> BTW, only clock on clocks.  Then use 'if' to decide whether or not
>>> to assign.
>>
>>
>> What do you mean with clock on clocks?
>
> Don't use a data signal as a clock.  Obviously, we're doing this in
> the clock GENERATOR, but once we have the signal generated properly,
> we connect it up to the clock distribution network (via a BUFG).  But
> in general, for "always @(posedge X)", X should only be a clock
> signal, not the output of some register or combinatorial logic.

Ok, that makes sense. But then I don't know what clock to use. I  
could introduce yet another one as incoming, but that might end up  
being redundant.

Cheers,

Michael
www.projectvga.org