/*watchdog.c
Atmel Wireless & uC 80C51RA2
Atmel Wireless & uC 80C51RD2
Atmel Wireless & uC 80C54X2
Atmel Wireless & uC 80C58X2
Atmel Wireless & uC 83/87C51RB2
Atmel Wireless & uC 83/87C51RC2
Atmel Wireless & uC 83/87C51RD2
Atmel Wireless & uC T87C5111
Atmel Wireless & uC T87C5112
Atmel Wireless & uC T89C51AC2
Atmel Wireless & uC T89C51CC01
Atmel Wireless & uC T89C51CC02
Atmel Wireless & uC T89C51IB2
Atmel Wireless & uC T89C51IC2
Atmel Wireless & uC T89C51RB2
Atmel Wireless & uC T89C51RC2
Atmel Wireless & uC T89C51RD2
*/
sfr  WDTRST  =   0xA6;			 
sfr  WDTPRG  =   0xA7;			 

//WDTRST sfr 地址為0x1E and then 0xE1，復(fù)位// 地址為0x0。
void rst_Watchdog( void )
{
	WDTPRG |= 0x07;
	WDTRST  = 0x1E;
    WDTRST  = 0xE1;
}

//main()
void main( void )
{
	int i;
	                                    // 設(shè)置看門狗時(shí)間為1個(gè)時(shí)鐘循環(huán)后
	rst_Watchdog();
	     	                            //關(guān)看門狗一個(gè)時(shí)鐘循環(huán)
	for( i = 0; i < 500; i++)
	{
		rst_Watchdog();
	}

	while(1)
	{
	  	                    //模擬出錯(cuò)
	}
}