具备程序移植功能的四位数码管显示

#define uint unsigned int

#define uchar unsigned char

uchar code num[]={0XC0,0XF9,0XA4,0XB0,0X99,

0X92,0X82,0XF8,0X80,0X90};

sbit p20=P2^0;

sbit p21=P2^1;

sbit p22=P2^2;

sbit p23=P2^3;

void delay(uint z)

{

while(z--);

}

void disp(uchar a,b,c,d)

{

P2=0x00;

p20=1;

P0=num[a];

delay(500);

p20=0;

p21=1;

P0=num[b];

delay(500);

p21=0;

p22=1;

P0=num[c];

delay(500);

p22=0;

p23=1;

P0=num[d];

delay(500);

p23=0;

}//以上程序可定义成7seg.h头文件，需要时直接加载，具体格式为：#include"7seg.h"

void main()

{

while(1)

{

disp(2,0,1,5);

}

}