以下是我写的键盘扫描及串行发送子程序，合在一起就不能用了！请各位指点下哦！
#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit cp=P2^5;
sbit ds=P2^4;
sbit a2=P2^3;
uchar code table[]={0x03,0x9f,0x25,0x0d,0x99,0x49,0x41,0x1f,0x01,0x09,0xe3,0x71,0x91,0xfe}; //0~9,L,F,H,.
void delay(uchar z)
{
uchar x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void delay50ms(uint time) //延时大约1ms
{
uint x,y;
for(x=time;x>0;x--)
for(y=5000;y>0;y--);
}
uchar scankey() //键盘扫描
{
uchar temp,num;
P2=0xcf;
temp=P2;
temp=temp&0x07;
while(temp!=0x07)
{
delay50ms(1);
temp=P2;
temp=temp&0x07;
while(temp!=0x07)
{
temp=P2;
switch(temp)
{
case 0xcb:num=1; break;
case 0xcd:num=2; break;
case 0xce:num=3; break;
}
while(temp!=0x07)
{
temp=P2;
temp&=0x07;
}
}
}
P2=0xef;
temp=P2;
temp=temp&0x07;
while(temp!=0x07)
{
delay50ms(1);
temp=P2;
temp=temp&0x07;
while(temp!=0x07)
{
temp=P2;
switch(temp)
{
case 0xeb:num=4;break;
case 0xed:num=5;break;
case 0xee:num=6;break;
}
while(temp!=0x07)
{
temp=P2;
temp&=0x07;
}
}
}
P2=0xdf;
temp=P2;
temp=temp&0x07;
while(temp!=0x07)
{
delay50ms(1);
temp=P2;
temp=temp&0x07;
while(temp!=0x07)
{
temp=P2;
switch(temp)
{
case 0xdb:num=7;break;
case 0xdd:num=8;break;
case 0xde:num=9;break;
}
while(temp!=0x07)
{
temp=P2;
temp&=0x07;
}
}
}
P2=0xff;
temp=P2;
temp=temp&0x07;
while(temp!=0x07)
{
delay50ms(1);
temp=P2;
temp=temp&0x07;
while(temp!=0x07)
{
temp=P2;
switch(temp)
{
case 0xfd:num=0;break;
case 0xfe:num=11;break;
}
while(temp!=0x07)
{
temp=P2;
temp&=0x07;
}
}
}
return num;
}
void display(uchar num) //串行发送
{
uchar a,b;
a=table[num];
for(b=0;b<8;b++)
{
a<<=1;
cp=0;
ds=CY;
cp=1;
}
b=0;
}
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