> What's the best strategy for dealing with updating
> a 10-bit PWM value asynchronously with TMR2?
>
> It looks like you could get a glitch if the update
> happens to occur just as TMR2 is overflowing.

I've thought about this too.  In the end I just updated the high 8 bits,
then the low two bits as quickly as possible thereafter.  Since PWM is
usually used to achieve an average duty cycle over a longer time interval
than the PWM frequency, I think you can just ignore the glitch because the
average will still be correct.  Yeah, I know, I'd feel better too if all 10
bits were properly double buffered in the hardware.


*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, olin@embedinc.com, http://www.embedinc.com

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads