pwm and interrupt on change on 18f2431

[lsteele]

Hello,

I'm using an 18f2431 and I want to be able to have two pwm outputs and also independently use two port b pins as inputs using the interrupt on change feature.

I was intending to use the power pwm feature on the chip for the two pwm outputs, but it looks like I have to give up two pins per pwm channel, which seems wasteful. As I've understood it each channel is allocated to two adjacent port b outputs, so pwm0 is on b0 and b1, pwm 1 on b2 & b3, and pwm 3 on b4 and b5. So I was thinking I could use pwm channel 3 leaving pins b0-b3 free. But I'm having a great deal of difficulty getting this to work and can't work out a configuration that'll give me the results I want. Is what I've described possible?

Any help is really appreciated as I'm finding the datasheet somewhat cryptic!

Thanks in advance. If I need to provide more information please let me know.

Luke

[PCM programmer]