Re: [myhdl-list] Examples of using classes?

[Christopher F. <chr...@gm...>]

On 7/28/15 5:50 PM, Jeremy Herbert wrote:
> Hi Chris,
>
> I was thinking of using inheritance in defining interfaces using classes
> like so:
>
> class FIFO(object):
> ...
>
> class AXIFIFO(FIFO):
> ...
>
> class WishboneFIFO(FIFO):
> ...
>
> Or even mixins:
>
> class FIFO(object):
> ...
>
> class AXI4SSlaveMixin(object):
> ...
>
> class AXI4SMasterMixin(object):
> ...
>
> class AXIFIFO(FIFO, AXI4SSlaveMixin, AXI4SMasterMixin):
> ...
>
> Does this make sense? I'd basically like to be able to drop the
> AXI4SSlaveMixin and replace it with WishboneSlaveMixin and have it "just
> work".

Yes, defining interfaces like this is great and you
can attach transactors, adapters, etc.

My approached would be to define the interfaces and
still use a function (myhdl module/component):

     def fifo(stream_in, stream_o):
         inst_adapter_i = stream_i.adapter() # bus specific to generic
         inst_adapter_o = stream_o.adapter() # ""

         # add logic ....
         @always_seq(stream_i.clock.posedge, ...)
         def rtl_in():
             if stream_i.valid:


     stream_in = AXI4()  # instantiate the specifi bus
     stream_out = AXI4() # instantiate the specific bus
     inst_fifo = fifo(stream_in, stream_out)

This is kinda like what I did here:
https://github.com/cfelton/minnesota/tree/master/mn/system

Regards,
Chris