Re: [myhdl-list] Developing PLI module for cosimulation with VCS

[James L. <rob...@gm...>]

No luck with 0.8 either, I tried cver, icarus, and modelsim.

Maybe I'm not compiling it for VCS correctly? All I'm doing is changing
cver/myhdl_vpi.c to include "vcs_vpi_user.h" instead of "cv_vpi_user.h",
and changing the include path in the Linux makefile to point to the VCS
include directory. After that, I just compile the module into a .so and
link that into VCS by using the -load myhdl_vpi.so:myhdl_register +vpi
options, if anyone if familiar with VCS.

On Fri, May 11, 2012 at 3:01 PM, James Lee <rob...@gm...>wrote:

> Hi all,
>
> Thanks for the quick responses. I'm hoping this gets placed into the same
> email chain, since I foolishly forgot to subscribe to the mailing list
> before sending my previous post.
>
> I tried compiling both the icarus and cver versions of the PLI modules and
> linking them in as shared objects, but the simulation seems to hang. I can
> confirm the callbacks are being executed by placing some debug print
> statements in myhdl_vpi.c, but when I dump the VCD, no signals are
> generated, so I'm convinced the VPI routines are not communicating signals
> correctly between the Python and the RTL.
>
> Previous to attempting to use VCS, I used iverilog for cosimulation
> successfully. So I am using all the same code with the only modifications
> being how the simulator is called on the Python side to create the
> Cosimulation object.
>
> I am using the 0.7 release right now, but I will go ahead and try with the
> latest dev release and report back with findings.
>
> Best,
> James
>
>
> On Thu, May 10, 2012 at 10:23 PM, James Lee <rob...@gm...>wrote:
>
>> Hi,
>>
>> I'm hoping to hack the PLI module for cosimulation with iverilog to make
>> it compatible with VCS.
>> Has anyone attempted something like this already and possibly provide me
>> with some insight on what changes would need to be made?
>>
>> Just based on what I read about the iverilog implementation, it seems
>> like the biggest hurdle is figuring out what type of callback to use and
>> when.
>> Would looking into if VCS can use the cbReadWriteSync callback instead of
>> the cbReadOnlySync be a good place to start?
>>
>> Thanks,
>> James
>>
>
>