[SOLVED] How to generate the PWM output for ATmega32 ?

[anoop kr]

Hai
I want to about the PWM of ATmega32. I just look in the datasheet but i cant understand enough.can anybody help me.

I want to know that for generating the PWM output what should i have to do?.

And which are the pins of ATmega32 for this.Is it OC1A and OC1B.And what is
OC2.
If i want to connect a buzzer which is PWM controlled what i have to do? Please help me:?

 

[john blue]

Re: PWM for my ATmega32.

**broken link removed**

---------- Post added at 14:25 ---------- Previous post was at 14:23 ----------

you must first understand what is pwm: try to read here, it will give you some clues: Introduction to Pulse Width Modulation (PWM) | Netrino

 

[zoro1]

Re: PWM for my ATmega32.

sample:

$regfile = "attiny2313.dat"
$crystal = 12000000

Config Portb = Output

Config Timer1 = Pwm , Pwm = 8 , Compare A Pwm = Clear Down , Prescale = 64

Pwm1a = 255

Do
Loop

End

For atmega32 :

$ regfile = "M32def.dat"

'Uncomment the following code to disable JTAG
Mcusr = &H80
'Mcusr = &H80

'tell the compiler which XTAL was used
$ crystal = 8000000


Startup:

Ddrb.3 = 1 'make pin4, portb.3 OC0 an output to drive LED


Tccr0 = &B01101001 'timer0 in fast pwm mode, prescale = 1
'Tccr0 = &B01101010 'timer0 in fast pwm mode, prescale = 8
'Tccr0 = &B01101011 'timer0 in fast pwm mode, prescale = 64
'Tccr0 = &B01101100 'timer0 in fast pwm mode, prescale = 256
'Tccr0 = &B01101101 'timer0 in fast pwm mode, prescale = 1024
'Tccr0 = &B01101101 'timer0 in fast pwm mode, external clock on t0 pin, falling edge
'Tccr0 = &B01101111 'timer0 in fast pwm mode, external clock on t0 pin, rising edge

Ocr0 = 0 'set the PWM value for timer0 to zero (0)

Do 'do this
Incr Ocr0 'add 1 to the PWM0 setting OCR0 means output compare register zero
Waitms 10 'stay on this ocr0 setting for 10 milliseconds
Loop

'end of PWM0 code
Compiler is BAscom AVR -free 2k of cobe