Hardware PWM help please?

Forum 2005-2010 (read only) General Frequently-Asked Questions
7

i read some forum threads about atmega's pwm. they mentioned some ways to define a certain frequency via the timer's prescaler. does anyone know how to get a certain frequency spectrum from the pwm?

i tried this code:

timer1SetPrescaler(64);
timer1PWMInit(9);
pinMode(9, OUTPUT);
timer1PWMAOn();
timer1PWMASet(128);

it seems to work, but i do not know how to calculate the right values.