Infrared Led Object Detection

[therian]

i would suggest to use something else than a
Sure it's possible with grandpa f84, with a bit of pain thought!

like how? to generate pulses and measure them at same time ? there is many situations when you need to do something similar(control couple H-bridges + response to RF+something else) and let not forget that usually there is no more than 2 hardware pwm in most PICs, so any program solution suggestions ?. first what came to my mind is to use 2 pics, one as many pwm's generator and other for everything else.