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以下为本人写的代码 是矩阵键盘的
要求按下16个矩阵键盘依次在数码管上显示1-16的平方。如按下第一个显示1，第二个显示4...
请高手指教哪里错了 为什么按下键盘后没有反应
#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
char temp,bai,shi,ge,key;
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void display(uchar bai,uchar shi,uchar ge)
{
dula=1;
P0=table[bai];
dula=0;
P0=0xff;
wela=1;
P0=0xfe;
wela=0;
delay(5);
dula=1;
P0=table[shi];
dula=0;
P0=0xff;
wela=1;
P0=0xfd;
wela=0;
delay(5);
dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0xfb;
wela=0;
delay(5);
}
void keyscan()
{
P3=0xfe;
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xee: key=1;
break;
case 0xde: key=2;
break;
case 0xbe: key=3;
break;
case 0x7e: key=4;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
temp=key*key;
bai=temp/100;
shi=temp%100/10;
ge=temp%10;
display(bai,shi,ge);
}
}
P3=0xfd;
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xed: key=5;
break;
case 0xdd: key=6;
break;
case 0xbd: key=7;
break;
case 0x7d: key=8;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
temp=key*key;
bai=temp/100;
shi=temp%100/10;
ge=temp%10;
display(bai,shi,ge);
}
}
P3=0xfb;
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xeb: key=9;
break;
case 0xdb: key=10;
break;
case 0xbb: key=11;
break;
case 0x7b: key=12;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
temp=key*key;
bai=temp/100;
shi=temp%100/10;
ge=temp%10;
display(bai,shi,ge);
}
}
P3=0xf7;
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=P3&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xe7: key=13;
break;
case 0xd7: key=14;
break;
case 0xb7: key=15;
break;
case 0x77: key=16;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
temp=key*key;
bai=temp/100;
shi=temp%100/10;
ge=temp%10;
display(bai,shi,ge);
}
}
}
void main()
{
while(1)
{
keyscan();
}
}
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