Re: [avr-chat] Error in Timing.

[Joerg Wunsch]

"Royce Pereira" <address@hidden> wrote:

> I checked my code(TCNT0 values etc) and found no error there.

TCNT0... are you using the "overflow reloads TCNT0" method?  This one
has a huge systematic error, and some statistical error depending on
how long interrupts might be blocked occasionally.

Better use CTC mode (clear timer on compare match) on a timer channel
that can understand it, as that performs everything in hardware, so
software latency issues don't affect the accuracy.

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)