AVR-Chat

maybe i'll just have to go for some trail-and-error.
next, i don't know how thw PWM works. i'll use mega16L.
in general, how does the PWM work? and in AVR, how should i do this?
thanks for the help.

David VanHorn <dvanhorn@cedar.net> wrote:
At 05:20 PM 6/19/2004 -0700, jay marante wrote:

>ok... assuming phil's data, this is what i sofar understand:
> 
>i should send a signal to the servo with 2ms (5V) to rotate it at maximum position and 1ms (5V) for minimum position. 
> 
>should i send this signal once (just sigle pulse) for the servo to rotate, say for maximum position? or should i send a continuous signal of 2ms length of 5V? and if that should be the case, what should be the length of the 0V in between the 5V signals? thanks...

I've always heard this delay referred to as the "framing delay".
If you were outputting for a transmitter, with 8 servos, you would send 
P.P.P.P.P.P.P.P_____ with the "_" part as the framing delay, and each "P"  is a pulse for a different servo.

I think there is some minimum delay between the pulses as well, but I never had to deal with this. 

The individual servo only sees P_____P_____ and every pulse is "for me".

I tried various framing delays from 20mS (very "steppy") to <10mS which didn't seem to show much improvement over 10mS.
Basically, the servos I tried, start running after the pulse finishes, then stop running if they don't get another pulse within 10-15mS



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