digitallight.c

共有四个例子

//8个数码管同时显示0-9
#include "reg51.h"

//管脚定义 74HC138（3-8）译码器输入控制信号线
sbit p10 = P1^0;
sbit p11 = P1^1;
sbit p12 = P1^2;

unsigned char table[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; //共阴数码管 0-9 表

void delay(unsigned int n);
void main(void)
{
	int i,t;
	unsigned char j;
	i=0;
	while(1)
	{
		if(i>=10) i=0;
		for(t=0;t<100;t++)
		{
			for(j=0;j<8;j++)
			{
				p10 = j&0x01;
				p11 = (j&0x02)>>1;
				p12 = (j&0x04)>>2;
				P2 = table[i];
				delay(1);
				P2 = 0;
			}
		}
	   	i++;
		delay(500);
	}
}
void delay(unsigned int n)
{
	unsigned int i,j;
	i=n;
	while(i--){		
		j=255;
		while(j--); 
	}	
}