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Re: [Gnucap-devel] Problem with logic elements on transient simulation
From: |
Felix Salfelder |
Subject: |
Re: [Gnucap-devel] Problem with logic elements on transient simulation |
Date: |
Tue, 6 Nov 2012 08:21:24 +0100 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
Hi there.
On Mon, Nov 05, 2012 at 02:01:32PM -0500, al davis wrote:
> If you look inside the subckt, you will see that node 4 never
> leaves the unknown state. That's the bug. The bug is that node
> "0" doesn't work in logic mode.
this is really bad. now i remember having wasted lots on time on this
already... (but didn't fix it, *sigh*)
> As a workaround, instead of tying that digital node to 0
> directly, tie it through a resistor. Then the circuit works as
> expected.
it's probably less time consuming to do one of these:
1) be verbose about it. for example issue a warning in DEV_LOGIC::map_nodes()
2) put _nstat[0].set_lv(lvSTABLE0); SIM_DATA::alloc_hold_vectors() for
now (as its better in most cases).
3) add a node_t to MODEL_LOGIC (_m=_ttt=0, _lv="something that
interprets gnd according to logic"), use it as "0" during
DEV_LOGIC::map_nodes.
so, 1 would be helpful, 2 is a hack and 3 should be easy enough...
regards
felix
- [Gnucap-devel] Problem with logic elements on transient simulation, Rupert Swarbrick, 2012/11/05
- Re: [Gnucap-devel] Problem with logic elements on transient simulation, al davis, 2012/11/05
- Re: [Gnucap-devel] Problem with logic elements on transient simulation,
Felix Salfelder <=
- Re: [Gnucap-devel] Problem with logic elements, patch proposal, Felix Salfelder, 2012/11/07
- Re: [Gnucap-devel] Problem with logic elements, patch proposal, Rupert Swarbrick, 2012/11/11
- Re: [Gnucap-devel] Problem with logic elements, patch proposal, al davis, 2012/11/11
- Re: [Gnucap-devel] Problem with logic elements, patch proposal, Felix Salfelder, 2012/11/11
- Re: [Gnucap-devel] Problem with logic elements, patch proposal, Rupert Swarbrick, 2012/11/11
- Re: [Gnucap-devel] Problem with logic elements, patch howto, Felix Salfelder, 2012/11/12
- Re: [Gnucap-devel] Problem with logic elements, patch proposal, Felix Salfelder, 2012/11/11
Re: [Gnucap-devel] Problem with logic elements on transient simulation, Felix Salfelder, 2012/11/05
Re: [Gnucap-devel] Problem with logic elements on transient simulation, al davis, 2012/11/15