// File : m11_power.c 

#include <gc80c510_so20i.h>

char timer0_flag;
char int0_flag;
char wdt_flag;

void init()
{
	timer0_flag = 0;
	int0_flag = 0;
	wdt_flag = 0;
	
	TMOD = 0x02;
	TH0 = 0x10;
	TF0 = 0;
	ET0 = 1;
	TR0 = 1;
	EA = 1;
}

void init_interrupt()
{
	IE0 = 0; 
	IT0 = 0;
	EX0 = 1;
	EA = 1;
}

void init_wdt()
{
	//
	// Initialize wdt mode
	//
	
	WD1 = 0;
	WD0 = 0;
	
	//
	// Restart wdt counter
	//
	
	RWT = 1; 
	
	//
	// set wdt mode
	//
	
	WD1 = 1;
	WD0 = 0;
	
	//
	// enable wdt interrupt
	//
	
	EWDT = 1;
}

void main()
{
	init();
	
	PCON |= 0x01; // set IDLE mode
	
	while(!timer0_flag);
	
	init_interrupt();
	
	PCON |= 0x02; // set STOP mode 1
	
	while(!int0_flag);

	init_wdt();
		
	PCON |= 0x02; // set STOP mode 2

	while(!wdt_flag);
	
	while(1);
}


void timer0_int(void) interrupt TF0_VECTOR 
{
	timer0_flag = 1;
	TF0 = 0;
	TR0 = 0;
}

void int0_int() interrupt IE0_VECTOR
{
	int0_flag = 1;
	IE0 = 0;
}

void wdt_int() interrupt WDT_VECTOR
{
	wdt_flag = 1;
	WDIF = 0;
}