//
//  Interrupt RTCC 
//
// testing the RTCC interrupt

#include <p24fj128ga010.h>

// notify the compiler we are not modifying the PSV
#define _NOPSV  __attribute__((no_auto_psv))

int Sec = 0;
int Min = 0;

// 1. Timer1 interrupt service routine
void _ISR _NOPSV _RTCCInterrupt( void) 
{
	// 1.1 clear the interrupt flag
	_RTCIF = 0;
	
	// 1.2 your code here
	Sec++;		// increment the seconds counter
	
	if ( Sec > 59)	// 60 seconds make a minute
	{
		Sec = 0;
		Min++;	// increment the minute counter

		if ( Min > 59)// 59 minutes in an hour
			Min = 0;
	} // minutes
} //T1Interrupt

main()
{
	// 2. init Timer 1, T1ON, 1:1 prescaler, internal  source
	_T1IP = 4; 		// this is the default value anyway
	TMR1 = 0;		// clear the timer
	PR1 = 32768-1;	// set the period register
	TRISA = 0xff00;	// set PORTA lsb as output
	
	// 2.1 configure Timer1 module
	T1CON = 0x8000;	// enabled, prescaler 1:1, secondary osc
	
	// 2.2 init the Timer 1 Interrupt, clear the flag, enable
	_T1IF = 0;	
	_T1IE = 1;
	
	// 2.3 init the processor priority level
	_IPL = 0;	// this is the default value anyway
	
	// 3. main loop
	while( 1)
	{
		// your main code here
		PORTA = Sec & 0xff;   
		
	} // main loop

} // main