[myhdl-list] GHDL co-simulation

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

I was investigating the GHDL VHPI (VPI) support a little since I have 
been having issues with co-simulation, thought I would try another 
approach.  According to the GHDL website enough of the VPI interface has 
been implemented to support IVI.

Working off an example I was able to compile the cver myhdl_vpi.c and 
load it in GHDL.  I have not looked at the MyHDL PLI/VPI implementation 
enough to go beyond this point.

I have included the hg bundle that has the Makefile.  Does anyone know 
if there is a GHDL VPI limitation that would make this _not_ worth 
pursuing?  Or has the GHDL VPI interface matured enough to support 
co-simulation with MyHDL?

Also, is there a known limitation with local module signals named _* 
(variable name starting with a "_") and VHDL conversion?  I did not 
realize (remember) that two consecutive underscores was illegal in VHDL? 
  Unfortunately, I have been using Signal names that start with an 
underscore quite a bit and the conversion generates two consecutive 
underscores.

.chris