PWM using a 16F873

[paul borgmeier]

Is it possible to drive these same control inputs to the L293 using PWM from the PIC ?

John,

I do this all the time with the L293 - what you want to do is exactly what you are doing for direction control except use PWM on the enable lines (rather than leaving them on).

Is that enough to get you going? (I expect to hear back from you in the next 10 minutes - we have a schedule to keep ... its 5AM here)

[Gixxer]

hahaha,

That actually cracked me up Paul. Thanks alot guys for the replies. Yesterday I was at a point in my project that you have all been I'm sure-STUCK. So you say to drive the enable pins with the PWM and continue to use my existing four control lines for direction? In other words six i/o are required from the pic. Seems like alot of io to use on motor control only, but I should be able to manage. I'm building a small tracked robot with half duplex rf tranceivers for telemetry and radio control-all digital R/C of course. It's such an involved project and I've had to break it up into sections and learn how to build it. Slowly but surely!
So does anyone have a small snippet PWM code that may get me going ?

thanks,

John.

[paul borgmeier]

http://www.melabs.com/resources/samples/pbp/hardpwm.bas

[Gixxer]

Thanks again Paul, that appears to be exactly what I need to get started on this. I'll give it a try when I get home tomorrow and let ya know.

John.