John Doty wrote: > On Sep 25, 2007, at 1:03 AM, Amos Tibaldi wrote: > >> Hello, >> I write this mail in order to obtain help if possible for the use >> of the ngspice simulator. How can I simulate the behaviour of a >> microcontroller that is present in the schematic of a circuit with >> ngspice? > > Basically, you can't. > > What I do in these situations is substitute voltage sources for the > microcontroller output pins and generate PWL stimuli for them. Put > probes where the inputs would be, .PRINT those voltages, and use an > AWK or C program to extract bits from the recorded voltages. Of > course, that's a one-way data flow: if you really want the > microcontroller to participate, you can't do it that way.
> Perhaps Al will chime in about gnucap: I suppose you could write some > sort of plugin that allows the program you'd run in the > microcontroller to interact in an event-driven way with an analog sim. Wouldn't it be nice to be able to use a model of some of the micro's inouts that is 2-way connected with a math model in Mathomatic, Octave, Mathematica? For modeling some DSP being done with the HW multiply in a MSP430 for instance. John Griessen -- Ecosensory Austin TX _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
