Timers for PWM Generation

Hello Guest,

i don't know the names of pwm registers for ATMega but the general method for pwm generation is as below...

You must load "duty value register" result of a calculation or result of an ADC of an input etc...

You must load "period register" with a value that depends on your update needs...

While Ti = instruction time, (may be equal Tosc/4 or Tosc/2 etc.. depending on processor used), PRval = period register value and DRval = duty register value :

period = PRval x Ti and,

duty cycle = DRval x Ti.

As you know the frequency equals inverse of period. Say Ti = 1 μsecond, then pwm period will be "PRval" μseconds and frequency of pwm will be (1 / PRval) MHz.

Thats all Guest!