Dual H-Bridge motor control

ricard0g0mes · Joined: 19 May 2009 Posts: 6

I'm trying to use this motor driver in my project:
http://www.sparkfun.com/commerce/product_info.php?products_id=8905
The pic is the 18f4550.

Anyone as an example with ccs?

robomaniac · Posted: Fri Jul 17, 2009 6:29 am

Created a PWM output

Connect that output to the PWMA and PWMB

Then you will to have 4 more output to control the direction of the motor.

So connect some IO to BIN1,BIN2, AN1 and AN2.

When
BIN1 = 0
BIN2 =1 motor will trun in one direction

BIN1 = 1
BIN2 = 0 motor will trun the other direction

The speed will be control with PWMB.

Look in the CCS manual page 236 of manual
http://www.ccsinfo.com/downloads/ccs_c_manual.pdf
or page 248 of pdf.

Look at the example file to have the code.

Have fun
_________________
Jérôme Demers
www.jeromedemers.com

ricard0g0mes · Joined: 19 May 2009 Posts: 6

but i want to control 2 motor's with different velocity's

robomaniac · Posted: Fri Jul 17, 2009 7:55 am

yes that is why you have PWMA and PWMB on your chip.

Depending of your PIC, you can have 2 PWM on the PIC

CCP1 and CCP2

I use 18F4580 for my robot sumo and I have 2 PWM.

Check the datasheet of your pic and see if you have 2 PWM on it.

Fisrt thing you must do, it dim a LED with CCP1. After you will create a other PWM. When that is done the rest is easy.
_________________
Jérôme Demers
www.jeromedemers.com