数码管一直显示0,键盘不起作用
时间:10-02
整理:3721RD
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#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar code table[]=
{
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0
};
uchar num,x,y,a;
uint temp;
void init();
void display(uint num);
uint keyscan();
void delay(uint z)
{
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void main()
{
while(1)
{
display(keyscan());
}
}
void display(uint num)
{
P1=0x00;
P0=table[num];
}
uint keyscan()
{
temp=P2;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P2;
switch(temp)
{
case 0x77:num=1;break;
case 0x7b:num=2;break;
case 0x7d:num=3;break;
case 0x7e:num=4;break;
case 0xb7:num=5;break;
case 0xbb:num=6;break;
case 0xbd:num=7;break;
case 0xbe:num=8;break;
case 0xd7:num=9;break;
case 0xdb:num=10;break;
case 0xdd:num=11;break;
case 0xde:num=12;break;
case 0xe7:num=13;break;
case 0xeb:num=14;break;
case 0xed:num=15;break;
case 0xee:num=16;break;
}
}
return num;
}
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar code table[]=
{
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0
};
uchar num,x,y,a;
uint temp;
void init();
void display(uint num);
uint keyscan();
void delay(uint z)
{
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void main()
{
while(1)
{
display(keyscan());
}
}
void display(uint num)
{
P1=0x00;
P0=table[num];
}
uint keyscan()
{
temp=P2;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P2;
switch(temp)
{
case 0x77:num=1;break;
case 0x7b:num=2;break;
case 0x7d:num=3;break;
case 0x7e:num=4;break;
case 0xb7:num=5;break;
case 0xbb:num=6;break;
case 0xbd:num=7;break;
case 0xbe:num=8;break;
case 0xd7:num=9;break;
case 0xdb:num=10;break;
case 0xdd:num=11;break;
case 0xde:num=12;break;
case 0xe7:num=13;break;
case 0xeb:num=14;break;
case 0xed:num=15;break;
case 0xee:num=16;break;
}
}
return num;
}