/*
PWM01.C 2006-05-09
David Ellis
http://home.comcast.net/~ellis76016/robots/
*/

#include "int16CXX.H"

#pragma chip PIC16F877

#pragma resetVector 0x0003

bit LED @ PORTD.0; //Pin40 = D0
bit pin2 @ PORTD.1; //Pin38 = D1
uns8 Ticks;

interrupt int_server(void) {
	int_save_registers // W, STATUS, and PCLATH
	if (TMR2IF) {
		Ticks++;
		if (Ticks == 100) {
			Ticks = 0;
			LED = ! LED; // toggle pin d0
		}
		TMR2IF = 0; /* reset flag */ 	
	}
	int_restore_registers // W, STATUS, and PCLATH
}

void main(void) {
	Ticks = 0;
	// set up PWM
	// bank 1
	PR2 = 0xFF;
	// bank 0
	CCPR1L = 0xA0;
	CCPR2L = 0xA0;
	T2CON = 0b.0011.1100;
	TMR2IF = 0;
	// bank 1
	TMR2IE = 1;
	// bank 0
	PEIE = 1;
	GIE = 1;
	CCP1CON = 0b.0000.1100;
	CCP2CON = 0b.0000.1100;

	PORTD = 0b.0000.0000;
	TRISD = 0b.1111.1100;

	while ( 1 ) { // loop forever
		nop(); // do nothing
		nop(); // do nothing
		pin2 = ! pin2; // toggle pin d1
	}
}