initial.c

空调遥控器编程实例

#pragma	sfr
extern	bit	light,degreeflag,entemptest;

void	initial()
{
/*	PU0=0x00;		/*port4 not use pull-up resistor*/
	PU0=0X10;	/*port4 and port0 use pull-up resistor*/
	PM0=0xf0;		/*port0 used as key output pins*/
	PM4=0xff;		/*port4 used as key input pins*/
	P0=0x0b;
	PM1=0xfd;		/*port1.0 used as input of select-jump;port1.1 used as LED output control*/
	P1.1=1;			/*LED low*/
	PM6=0xfe;		/*port6.0 used as carrier output pin, port6.1 used as temperature-analog input pin*/
 	ADS0=1;
	PF8=0x00;		/*port8 used as general input-pin function*/
	KRM00=1;
/*	LCDM0=0x04;	*/
/*	LCDC0=0x02;		/*LCD frequency is drived by sub-oscillator, and it's frequency is 128HZ*/
/*	LCDVA0=0X01;*/
	light=0;
	if(P8.1)
	{
		light=1;
	}
	degreeflag=0;
	if(P8.2)
	{
		degreeflag=1;
	}
	entemptest=0;
	if(P8.3)
	{
		entemptest=1;
	}
}