Posted: Thu Jul 27, 2006 2:39 am Post subject: DC Motor control
am trying to control the speed of 2 dc motors on my robot. I am using an Atmega 168 and 2 L9110 h-bridges to drive them. I know that I can use timer1 for PWM but the problem is the pins that control the motors are connected to pd4 pin, pd5 pin, pd6 pin, pd7 pin. So how do I get PWM to work on pd5 pin and pd6 pin. I know that those pins can be changed to timer0. But I don’t know how to do that in Bascom nor do I know how to set timer0 to PWM.
Joined: 24 Jun 2004 Posts: 190 Location: 127.0.0.1
Posted: Tue Nov 07, 2006 1:03 pm Post subject:
Well you could use something like this:
Code:
ConfigTimer1=Timer , Prescale =64 OnTimer1 Myisr 'Op interrupt ga naar myisr EnableTimer1 startTimer1
..
..
..
Myisr: setportd.x
Waitms10 resetportd.x
Return
It's pretty dirty.. But it could give you a head start.. You have to look in the help files for further help to get this to fit you application..
This is a bit of code in a huge programm that generated a 0.5 seconds interrupt. By using a counter it counted till a few minutes and then released a relay. But in the meanwhile it had to check constant if there where no IR instructions.. So working on interupts helped me out.. _________________ Bascom AVR 1.11.8.8 full version
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ISP Programmer
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