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[SOLVED] pic18f4520 timer0 interrupt problem

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In the ISR, change this:
Code: 
LATDbits.LATD0=!LATDbits.LATD0;
to this:
Code: 
LATDbits.LATD0=!PORTDbits.RD0;
LATD is only for outputting values to the ports (writing to ports). PORTD is only for inputting from ports (reading from ports).

With a 20MHz clock, the interrupt occurs every ~3.55 seconds.

Hope this helps.
Tahmid.
 
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