51单片机矩阵键盘数码管显示 Proteus仿真代码数码管显示不完整 -

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
void delay1(int x){
uint i,j;
for(i=0;i<123;i++)
for(j=0;j<x;j++);
}
//uchar led[]={0x00,0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0X77,0X7C,0X39,0X5e,0X79,0X71};
uchar led[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E,0X71 };
unsigned int num[]={0xee,0xed,0xeb,0xe7,0xde,0xdd,0xdb,0xd7,
0xbe,0xbd,0xbb,0xb7,0x7e,0x7d,0x7b,0x77};
unsigned char hang[]={0xef,0xdf,0xbf,0x7f};
uchar key_scan(){
uchar a,i,n;
for(a=0;a<4;a++){
P1=hang[a];
if(P1!=hang[a]){
delay1(100);
if(P1!=hang[a]){
for(i=0;i<4;i++){
if(P1==num[4*a+i]){
n=4*a+i+1;
}
}
}
}
}
return n;
}
main()
{
P2=0XFE;
while(1)
{
P0=led[key_scan()];
}
}

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