Possible to use MPLAB to simulate waveforms and response to input? - Electronic Circuits Projects Diagrams Free

toodles · 27th June 2007, 10:13 AM

I continuing work on a project of mine you can read about here:
http://forums.shoryuken.com/showthre...91#post3898091

I'm trying to add support for the Nintendo Gamecube. The Gamecube uses a single open collector line for communication, with each bit taking 4us: if its a high bit, is 1us low, 3us high while a low bit is 3us low, 1us high. now I think I've got the code for reading and writing this way set, but of course its not working on the real hardware.

What I'd like to figure out is how to use a waveform of some sort on the computer for simulation and debugging. I'd also like the ability to see the wafeform the PIC responds with. I can see the 'Stimulus' and 'workbook' menu items in MPLAB using MPSIM, but I cannot find any usefull information on HOW to use them, or if they even do what I am wanting. What I really want is something like ModelSIM from the Xilinx WebPack, but for PICs.

Given my situation of needing both input and output stimulus, what sort of simulation and debugging options do I have, and where are some easy instructions on starting their use?

eng1 · 27th June 2007, 10:53 AM

Go through the following steps:
1. Create a New Workbook
2. Click on "Click here to Add Signals" and choose your input pin (GP0 in my example).
3. Enter the data: time instants and binary values.
4. Save the file.

I've created a sequence of three 1s according to the specs you posted, see the image below. When you run the debugger, you can view the registers' content and undertand how the PIC reacts.
Hope this helps.

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27th June 2007, 10:13 AM	#1
toodles	Possible to use MPLAB to simulate waveforms and response to input? I continuing work on a project of mine you can read about here: http://forums.shoryuken.com/showthre...91#post3898091 I'm trying to add support for the Nintendo Gamecube. The Gamecube uses a single open collector line for communication, with each bit taking 4us: if its a high bit, is 1us low, 3us high while a low bit is 3us low, 1us high. now I think I've got the code for reading and writing this way set, but of course its not working on the real hardware. What I'd like to figure out is how to use a waveform of some sort on the computer for simulation and debugging. I'd also like the ability to see the wafeform the PIC responds with. I can see the 'Stimulus' and 'workbook' menu items in MPLAB using MPSIM, but I cannot find any usefull information on HOW to use them, or if they even do what I am wanting. What I really want is something like ModelSIM from the Xilinx WebPack, but for PICs. Given my situation of needing both input and output stimulus, what sort of simulation and debugging options do I have, and where are some easy instructions on starting their use?

27th June 2007, 10:53 AM	#2
eng1	Go through the following steps: 1. Create a New Workbook 2. Click on "Click here to Add Signals" and choose your input pin (GP0 in my example). 3. Enter the data: time instants and binary values. 4. Save the file. I've created a sequence of three 1s according to the specs you posted, see the image below. When you run the debugger, you can view the registers' content and undertand how the PIC reacts. Hope this helps. Attached Thumbnails Last edited by eng1; 27th June 2007 at 11:01 AM.