Hello, Charles Bannister

thanks for the good address, i have seen the codes that they have used to generate LED PWM to turn thr led on and off, just like walk and don`t walk assign. but its good.

the thing i got to do is that i have to control two stepper motors.

89C52 H-bridge motor IC motor coils
P.1
MCU------>L297-------->SLA7024M------>stepper motors.

this is my idea. but here i got common Question!!!!..

i have seen throughout the search engine, PWM should generated for DC motors. but i haven`t seen some one used PWM with stepper motors.

so my qyestion is that how to drive stepper motrs without PWM, if its possible according to the interface line??

Regards
Azam