51单片机数码管动态扫描C程序

#include <reg51.h>

sbit P00 = P0 ^ 0;
sbit P01 = P0 ^ 1;
sbit P02 = P0 ^ 2;
sbit P03 = P0 ^ 3;

int DATA_LED[11] =
{
//0~9的数码管段码 A0H,BBH,62H,2AH,39H,2CH,24H,BAH,20H,28H 根据具体电而定，不通用
0xA0, //0
0xBB, //1
0x62, //2
0x2A, //3
0x39, //4
0x2C, //5
0x24, //6
0xBA, //7
0x20, //8
0x28, //9
0xFF
};

void delay(int m) //延时程序，延时m*0.5毫秒
{
unsigned int i;
unsigned int j;
for (i = 0; i < m; i++)
{
for (j = 0; j < 500; j++){}
}
}

void led(int n) //数码管显示及数据处理程序
{
P1 = 0xFF;
P1 = DATA_LED[n % 10]; //个位
P00 = 0;
delay(1);
P00 = 1;

P1 = 0xFF;
P1 = DATA_LED[n / 10 % 10]; //十位
P01 = 0;
delay(1);
P01 = 1;

P1 = 0xFF;
P1 = DATA_LED[n / 100 % 10]; //百位
P02 = 0;
delay(1);
P02 = 1;

P1 = 0xFF;
P1 = DATA_LED[n / 1000 % 10]; //千位
P03 = 0;
delay(1);
P03 = 1;
}

void main(void)
{
while (1)
{
led(404); //显示数字404，实际显示的是0404，需要在led()函数中判断，没有千位的情况，不是让显示成0
}
}