DT Interupts PortA or PortB?

[Charles Linquis]

The preload value for a timer is easily calculated with Mister E's PIC MultiCalc.

http://www.picbasic.co.uk/forum/atta...7&d=1225550328

[ShaneMichael]

Charles and Henrik;
Preloading TMR3 Worked like a charm, I made it go just a little faster than I need just for some room for error. With a preload of:

TMR3Preload       CON 51650

I put this at the end of my TMR3 interupt routine to preload:

T3CON.0 = %0   'Turn Timer Off To preload for frequency I need.
TMR3Now.Highbyte = TMR3H
TMR3Now.LowByte =  TMR3L
TMR3Now = TMR3Now + TMR3PreLoad
TMR3H = TMR3Now.HighByte
TMR3L = TMR3Now.LowByte
T3Con.0 = %1  'Turn Timer on

Seems to run at 355-360 hz. The error is probably in how I'm capturing the frequency, it's probably more accurate than that. That's what I need though, MISTER E's MultiCalc is handy for this, so thanks also to Mister E and everyone else. I didn't know I could preload the timer, I'm learning more all the time.

Thanks Again,
Shane