[myhdl-list] Re: MyHDL / ModelSim cosim

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

Tom Dillon wrote:
> Hi,
> 
> I was attempting to connect myhdl to Aldec Riviera, which usually is 
> similar to ModelSim.
> 
> I've got everything compiled and the it runs OK with the Icarus vpi 
> interface, but I don't get the inputs of my dut initialized or stimulated.
> 
> Did you have to do anything to the Icarus myhdl code to get further with 
> ModelSim?
> 
> Any thoughts on how to troubleshoot this?

Some hard debugging sessions, I fear :-)

Without access to the tool, I cannot help much, but
here are some preliminary thoughts anyway:

Are you sure their VPI implementation is complete? In
particular, is vpi_put_value on a reg supported?
I remember having seen docs on a tool - don't remember
if it was Aldec - where this wasn't supported, although
they claimed VPI support. Also, it seems they have other
(proprietary) ways to couple to C models, which they
may give priority.

Regards, Jan

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