gnupic: gpsim breadboard
Subject:
Re: gpsim breadboard
From:
Scott Dattalo ####@####.####
Date:
7 Jun 2002 14:01:33 -0000
Message-Id: <Pine.LNX.4.44.0206070645390.6970-100000@ruckus.brouhaha.com>
On Thu, 6 Jun 2002, Ralf Forsberg wrote:
> It is now kind of usable.
>
> What is implemented:
> Adding modules and nodes.
> Creating and connecting (and disconnecting) nodes to pins.
> Removing nodes and modules.
> Positioning modules.
> Saving (no file selector yet) to a .stc file. Saves module libraries, modules
> (and module positions), nodes and node connections.
>
> What will be implemented:
> Module library dialog for adding libraries.
> File selector for saving.
>
> What may be implemented:
> Saving/changing module attributes.
> When moving mouse over a pin, draw (straight) lines to connected pins.
> Your suggestions.
>
>
> I managed to create this yesterday:
> http://www.acc.umu.se/~rfg/dump.gif
> (It's the breadboard, with a three bit adder implemented with logic gates,
> connected to a pic that drives an 7-segment led.)
This is impressive!
>
> (Sorry about the xor-symbol :-)
>
> I also managed to create a latch, it seems you are not limited to
> combinatorial logic. (Oscillators won't work though :-).
The stimuli logic will happily propogate state. If that state happens to
be fed back into the input (like in an oscillator), the stimuli engine
will hang forever. Perhaps I need to add a counter in there to keep track
on how many times the state gets propogated.
> (This is still a work in progress, there are bugs. But if you do try
> it and find bugs that you think I might not know about, then mail me.)
I think once you fill that the bugs are mostly out, then it's time for a
new release. I also have a few bug fixes that several people have
submitted that need to get into a new release.
Scott
