solarwind wrote:
> I'm looking for
> some pre-made routines. Using the timer is another option, but the
> dsPIC33 datasheet doesn't explain too much about TIMER1.

It's not that hard to figure out, IMO. The Family Reference Manual has 
everything you would want to know about it:

http://ww1.microchip.com/downloads/en/DeviceDoc/70205B.pdf

Vitaliy 

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