#define LCD
#include "freedom.h"
#include <pcf8563.h>

unsigned char my_is_alarm_ON_RTCC (void);

void High_Int_Event(void);
#pragma code high_vector = 0x08
void high_interrupt(void) { _asm GOTO High_Int_Event _endasm }
#pragma code
#pragma interrupt High_Int_Event
void High_Int_Event(void)
{
	BUZZER = 1;
}	

void main()
{
	InitFreedom();
	
	RCONbits.IPEN = 1; //architettura PIC18
	INTCONbits.GIEH = 1;
	INTCONbits.GIEL = 1;	
	//abilita interrupt su INT2 (JP9 in posizione 1-2)
	INTCON3bits.INT2IE = 1;
	INTCON2bits.INTEDG2 = 0; //fronte di discesa
	INTCON3bits.INT2IP = 1;
	
	// Inizializza il modulo I2C a 400KHz @20MHz
	OpenI2C(MASTER, SLEW_ON);	
	SSPADD = 12; 		

	// Inizializzo la data	
	set_days_RTCC (0x30);
	set_months_RTCC (0x12);
	set_years_RTCC (0x08);
	
	// Inizializzo l'ora
	set_hours_RTCC (0x02);
	set_minutes_RTCC (0x56);
	set_seconds_RTCC (0x53);
	
	//imposta l'allarme (stesso giorno dopo mezzo minuto)
	enable_alarm_interrupt_RTCC();
	//set_days_alarm_RTCC(0x30,0);
	//set_hours_alarm_RTCC(0x02,0);
	set_minutes_alarm_RTCC(0x57,0);
	
	// buzzer test
	BUZZER = 1; delay_ms(50);
	BUZZER = 0; delay_ms(50);
	BUZZER = 1; delay_ms(50);
	BUZZER = 0; delay_ms(50);
	BUZZER = 1; delay_ms(50);
	BUZZER = 0;
		
	while (1)
	{
		HomeLCD();  WriteStringLCD("Time: "); WriteVarLCD(get_date_RTCC ());
		Line2LCD(); WriteStringLCD("Date: "); WriteVarLCD(get_time_seconds_RTCC ());
		if (my_is_alarm_ON_RTCC()) WriteStringLCD(" X"); else WriteStringLCD(" _");
		}
}

//************************************************************
//             IsAlarmON function implementation
//************************************************************
unsigned char my_is_alarm_ON_RTCC (void) {	
	
	unsigned char value;
	value = EERandomRead (WRITE_ADD,CONTROL_REG_2_ADDR); 
	
	// Just AF bit is controlled 
	if (value & 0x08) {
		
		value = value & 0xF7;	
		
		// I clean AF bit without canging the other bits
		//modificata !!!!!!!
		//EEByteWrite (WRITE_ADD,0x01,value);
		return (1);	
	
	} else {
		return (0);	
	}
		
}