[TUT] ATMEGA328PB, 16-bit timer, servo, FastPWM, HXT900

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This is using FastPWM for driving a servo.

 

Discussion:

 

Three Tutorials concerning controling a analog servo. The servo used for testing is the Hextronic XHT900.

 

The Tutorials:

 

[TUT] ATMEGA328PB, 8-bit timer, servo, pwm, HXT900

 

8-BIT TIMER not suitable for driving servo, except when only a few positions are needed,on 11 degree multiples, 1 step = 11 degrees. Advantage – replace 16-bit timer for a limited number of cases.

 

[TUT] ATMEGA328PB, 16-bit timer, servo, PWM, HXT900

 

16-bit TIMER with Phase Correct PWM. 11 steps/degree. Disadvantage – period

jitter on output wave form.*

 

[TUT] ATMEGA328PB, 16-bit timer, servo, FastPWM, HXT900

 

16-bit TIMER with FastPWM. 22 steps/degree.

 

It appears that the FastPWM Mode is the most useful for driving a servo. However, applications are

different. I would suggest that you write some small programs an test you application ideas.

 

 

 

* jitter happens when changing pulse width.

 

 

Attached are 3 files, 1 pdf, 2 programs:

 

Attachment(s):