Hi All.

Wondering what the best way to generate interrupt based stepper motor step
delays in software would be?

Say a stepper has 200 steps/rev and i want to run it between 0-5 revs a
second. Thats 0-1000 steps per second. Ideally i'd like to have a 10 bit
value 1-1000, but even an 8-bit value 0-250 with a multiplaction factor of 4
would suffice, and generate an interrupt at the right frequency to drive the
stepper. The scale has to be linear (or close to it).

At 1000 steps/sec that works out to 1 interrupt every 1mSec. At 1 step/sec
it's a full second between interrupts. At values in between there are a
bunch of unfriendly numbers. I could just use the equation: time between
interrupts = 1/(number of steps per second). But i'm having a hard time
figuring out how i could use any of the timers to help me out. It has to be
interrupt driven 'cause there's a bunch of other stuff going on at the same
time.

Currently using a PIC16F877. Anyone got any ideas?

TIA.

Kresho Sprem

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