Multiple PWM and port C

[richard]

all the spwm interrupts will muck up the i2c and onwire timing . you will probably need to disable the ints during the actual data transfers

[HenrikOlsson]

Hi Richard,
That was my initial thought as well but then Scampy wrote:

Interestingly, I have the temp sensor (18B20) on port RA5. If I use RA4 and RA7 as the PWM pins the temperature reading goes heywire, displaying random temperatures like 163C but is often trying to over write the display. With RA4 and RA7 set as the pins for pWM, the clock on C3 and C4 runs fine...

Which indicates that as long as the PWM is not on the same port as the I2C it does seem to work - only when the PWM and I2C (or 1Wire) is on the same port does it act up.
If it was a timing issue then I can't see how moving the I2C to a different port than the PWM would make it work. I'm leaning more towards some kind of port or tris register overwrite causing the issue, perhaps a R-M-W but of course I can't say for sure.

/Henrik.