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I've upgraded to a 16F88 chip now.

Just a thought, is it possible for SSPWM to use TMR0 instead of TMR1 on the 16F88 bearing in mind my 2khz
PWM requirement with variable 10-90% duty in 1%...

Thanks working now.

Nope same error :(

Can you post exactly whats in your source code boxes?

Daryl

I bought Proteus and can now load your program but get 1 error on simulation which says.

"Not Built requires PBPW"

Any ideas?

Thanks to all those who helped with this :) i have had this breadboarded and working in my pic on bench today, it works great. What a forum incredible. Now to design my pcb.

Back to breadboard then it will cost be a fortune to upgrade suffciently to run it. Thanks anyway.
I only have the picaxe VSM lite software which doesnt support simulating plain pics etc anyway.

Darrel

Can you tell me the version of issis/proteus you are using i can't load it, my version is 7.4 SP2

Cheers

Incredible I was envisaging pages of code! many thanks to Darrel :)

Could you post that Isis code and hex code as i have it and would like to look at the simulation.

Thanks for the reply. I do plan on doing something with this in due course. My chip will be limited to 8mhz so
can it reach 2khz with the limited clock speed. 80 points resolution would be fine.

Just resurecting this thread does Mikes idea below look feasible in PBP running at 8mhz on a 12F683? Can I use DT interrupts on timer 2 IT flag if it is being used by the HPWM module to maintain...

Thanks for those good ideas. I'll post some code when I have it on breadboard and tested with scope.

I'm trying to produce two pwm streams from a single 12F683 chip.

The first is fairly easy, a 20khz (25 or 50%) duty cycle for which i can use the chip pwm pin and module.

The second is much...