John Griessen wrote: > 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.
mmmmm Verilog-AMS. That can get you closer. You probably don't want to build a complete model for a microcontroller in verilog to the point of being able to run the same firmware image as the real hardware, but you probably could. _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
