main.c

51单片机的数码管动态扫描源代码。包括Keil工程

#include<reg52.h>

#define T0_INTERRUPT 1  //T0中断向量号
//共阳极数码管7段码
unsigned char seg[] = {0x3F,0x06}; //简化只显示0和1

unsigned char SegScan[] = {0xFE,0xFD,0xFB,0xF7,0xEF,0xDF};//6个数码管控制

void Init_T0()
{
	TMOD &= 0xF0;
	TMOD |= 0x01;  //16位定时器模式
	
	TH0 = 0xFC;
	TL0 = 0x18;
	
	EA = 1;       //开全局中断
	ET0 = 1;	  //允许T0中断
	TR0 = 1;	  //启动定时器
}

void Display()	//扫描显示
{	
	static unsigned char i = 0;
	P2 = SegScan[i];
	P1 = 0xFF - seg[i%2]; //转换成共阴极数码管,seg[i%2]可以在其他函数进行更新
	i++;
	if(i>5) i = 0;
}

void main(void)
{
	Init_T0();
	while(1)
	{
		PCON |= 0x01;
	}
}

void T0_Interrupt() interrupt T0_INTERRUPT
{
	static unsigned char i = 0;
	TH0 = 0xFC;
	TL0 = 0x18;
	i++;
	TF0 = 0;
	if(i == 3)  //3毫秒扫描一次
	{
		Display();
		i = 0;
	}
}