键盘输入显示程序

#include

#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,0x79,0x71,0x00};//0-f-最后一个空uchar j=1;

sbit p37=P3^7;

void delay(uint z)

{

uintx,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

void display(ucharshu)

{

P1=table[shu];

delay(5);

}

ucharkeyscan()

{

uchartemp,num;

P2=0xfe;

temp=P2;

temp=temp&0xf0;

if(temp!=0xf0)

{

p37=0;

delay(5);

temp=P2;

temp=temp&0xf0;

while(temp!=0xf0)

{

temp=P2;

switch(temp)

{

case 0xee:num=1;break;

case 0xde:num=2;break;

case 0xbe:num=3;break;

default:break;

}

while(temp!=0xf0)//**********松手检测松手后显示{

j=0;

temp=P2;

temp=temp&0xf0;

}

}

}p37=1;

P2=0xfd;

temp=P2;

temp=temp&0xf0;

if(temp!=0xf0)

{

p37=0;

delay(5);

temp=P2;

temp=temp&0xf0;

while(temp!=0xf0)

{

temp=P2;

switch(temp)

{

case 0xed:num=4;break; case 0xdd:num=5;break; case 0xbd:num=6;break; }

while(temp!=0xf0)

{

j=0;

temp=P2;

temp=temp&0xf0;

}

}

}p37=1;

P2=0xfb;

temp=P2;

temp=temp&0xf0;

if(temp!=0xf0)

{

p37=0;

delay(5);

temp=P2;

temp=temp&0xf0;

while(temp!=0xf0)

{

temp=P2;

switch(temp)

{

case 0xeb:num=7;break;

case 0xdb:num=8;break; case 0xbb:num=9;break; }

while(temp!=0xf0)

{

j=0;

temp=P2;

temp=temp&0xf0;

}

}

}p37=1;

P2=0xf7;

temp=P2;

temp=temp&0xf0;

if(temp!=0xf0)

{

p37=0;

delay(5);

temp=P2;

temp=temp&0xf0;

while(temp!=0xf0)

{

temp=P2;

switch(temp)

{

case 0xe7:num=16;break; case 0xd7:num=0;break; case 0xb7:num=16;break; }

while(temp!=0xf0)

{

j=0;

temp=P2;

temp=temp&0xf0;

}

}

}p37=1;

//if(j==1)num=16; returnnum;

}

void main()

{

p37=1;

while(1)

{

display(keyscan());

//display(7);

}

}

我写的简单键盘程序并有数码管显示仿真结果如图所示你可以按照图示实验有什么问题可以共同讨论