Re: [myhdl-list] Wait within @always()

[Ben <ben...@gm...>]

On Wed, Aug 3, 2011 at 09:50, Uri Nix <ur...@gm...> wrote:
> Hi,
>
> I'm using MyHDL to model a FSM, and would like to wait/delay the state
> transitions, something like this:
>
> @always(clk.posedge)
>  def logic():
>     if state == t_State.ONE:
>         state.next = t_State.TWO
>         # wait for something comparable to myhdl.delay(x)
>     ...
>
> If I understand correctly, this would require changing the function's
> sensitivity list dynamically - is it possible?
> I'd prefer to keep using the @always() pattern instead of yielding
> explicitly.
>

You can achieve something similar by using a DelayedSignal instead of
a standard Signal. The drawback is that every next on this signal will
be delayed. You just have to specify a "delay" value while defining
your signal. I'm not sure this is documented, look at the code if in
doubt.

Regards,
Benoit