Re: [myhdl-list] Beginners question

[Thomas H. <th...@py...>]

Jan Decaluwe schrieb:
> Thomas Heller wrote:
>> If I have two or more events in an always decorator:
>> 
>> @always(a.negedge, b.negedge, delay(10))
>> def func():
>>     ...
>> 
>> how can I determine inside func which event is currently handled?
> 
> Currently there is no direct way. For edges and signals, it may
> be possible to support this by making sure that certain
> attributes (e.g. 'negedge') can be checked in code. But that
> is not possible currently (that is, it won't work as expected).
> For other things, such as delays, it's not clear how to do it.
> 
> However, do we actually need this?
> For synthesizable code, the classic synthesis templates are such
> that the relevant checks are done implicitly by the
> top-level if-then-else structure.
> 
> For non-synthesizable code, you have the option of using
> separate always blocks, each triggered by the relevant condition.
> 
Well, I guess the answer is "don't do this" anyway.  It seems
I have still to switch from the more software oriented mental model back
to hardware oriented.

Thanks,
Thomas