I want to use the interrupt system to make my Pulse Width Modulated pulses output at 50hz. I am hoping that will give me finer control of the wheel speed and maybe a quicker steering response.

I understand that I need to preset TMR1 with a number so that it rolls over every 20 ms. thereby triggering the interrupt. How do I figure out what that preset number should be and how do I set it using PBP?

Ken