8个数码管

LED1-LED8分别有P22,P23,P24的A,B,C控制

C  B  A

000  0-1

001  1-2

010  2-3

011  3-4

101 4-5

110  6-7

111  7-8

共阴极数码管，八段

0-F编码

硬件图

对应P0口

main.c

#include<reg52.h>


typedef unsigned int u16;
typedef unsigned char u8;

#define SMG P0
sbit A=P2^2;
sbit B1=P2^3;
sbit C=P2^4;

u8 gsmg_code[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
				0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};//共阴0-F

void delay_10us(u16 n)
{
 	while(n--);
}

void main()
{
 	int