Re: [Iverilog-devel] Cosimulation with Icarus

[Kevin C. <iv...@gr...>]

Hi Felix,

I handed over working code (still have it around somewhere), got it back converted to a "plugin" (unnecessarily), and 
not working.

Given Xyce is a lot better and GPL'd, I'm considering Gnucap a dead project now.

Kev.

On 1/19/2018 12:16 AM, Felix Salfelder wrote:
> On Thu, Jan 18, 2018 at 06:55:03PM -0800, Kevin Cameron wrote:
>> I was trying to get the guys at Analog Rails to work on it, but the
>> Gnucap folk were clueless and it didn't go anywhere.
> Hi there.
>
> at the time Kevin was experimenting with this, gnucap was in transition
> to plugins. presumably, only Al knew how it was supposed to work. The
> main idea is that contributions are plugins, and incomplete
> contributions can be immediably shared (and are workable) without
> needing either review or changes to the kernel.
>
> we are getting there. i have not used icarus or revisited icarus plugins
> since, but things are evolving.
>
> - there are more plugins available now. i see them as proof of concept
>    of the idea. but some of them work quite well.
>
> - cosimulation related plugins exist [1,2]. this is analog only, but the
>    idea is clear. with some tweaking, a similar approach could support
>    connectmodules and a discrete event protocol.
>
> - the solver is now preloadable. with this it is possible to hook in
>    domain specific calls. i use this for physics based models. in
>    principle you could put vvp or a vpi interface here.
>
>> Generally you want to have the analog simulator as master and digital
>> as the slave (analog does event scheduling) if you can.
> yes.
>
> cheers
> felix
>
> [1] https://github.com/gnucap/gnucap-coupling/blob/master/README
> [2] https://github.com/gnucap/gnucap-jack
>
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