因為昨天只給了代碼，管理員讓補上原理圖，因為剛來貴地，沒有找到編輯窗口，所以重新發一下，希望可以幫助有需要的同學們#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
unsigned char code seg7code[16]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
unsigned char k;
void delay10ms(void)
{
unsigned char i,j;
for(i=20;i>0;i--)
for(j=248;j>0;j--);
}
void Getchar ( )
{
unsigned char X,Y,Z;
P1=0x0f;
if(P1!=0x0f)
{
delay10ms();
if(P1!=0x0f)
{
X=P1;
P1=0xf0;
Y=P1;
Z=X|Y;
switch ( Z )
{
case 0xee: k=0; break;
case 0xed: k=1; break;
case 0xeb: k=2; break;
case 0xe7: k=3; break;
case 0xde: k=4; break;
case 0xdd: k=5; break;
case 0xdb: k=6; break;
case 0xd7: k=7; break;
case 0xbe: k=8; break;
case 0xbd: k=9; break;
case 0xbb: k=10;break;
case 0xb7: k=11;break;
case 0x7e: k=12;break;
case 0x7d: k=13;break;
case 0x7b: k=14;break;
case 0x77: k=15;break;
}
}
}
}
void main()
{
while(1)
{
P1=0xff;
Getchar(); //調用取鍵值函數
P0=seg7code[k]
P=0x0f;
}
}
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