define.h

这是一个51系列单片机控制加热温度的程序

#define ON 1 
#define OFF 0 
#define VREF 483 
#define LED_ON P1^3=0 
#define LED_OFF P1^3=1 
#define SPK_ON P1^4=1 
#define SPK_OFF P1^4=0 
#define uchar unsigned char 
#define uint unsigned int 
#define ulong unsigned long
typedef union
{
	uint time;
	uchar hl[2];//0high byte 1 low byte
}int2char;