Long Timer

[Tissy]

Cheers for the reply.

I am using a 20MHz resonator. So you reckon if i put in a Crystal instead, that should improve matters?

I know what your saying about a minute error over 8 hours, but i just wanted it as accurate as possible. When its timing seconds only, thats fine, the error just creeps in over longer periods.

I will get myself a 20MHz crystal and see if this changes things.

I also really just wanted to make sure my code looks OK, there's only so many times you can tolerate waiting a long period to check for accuracy.

Regards,

Steve

[Ingvar]

Well ...... it's always a good start to KNOW that your oscillator is reasonable accurate. You will definatley get a more accurate source using a crystal. If it makes your timing worse, atleast you know it's in the software. Personally, i would have made this kind of application with a timer and interrupt. Not that it's absolutley necessary, i just find timers useful for timingpurposes.