怎么通过编程实现单片机按键扫描显示0到15，比如按下按键1显示1，按下按键2显示2.....按下按键11显示11
这是我的原程序，只能实现单数，不知道怎么实现双数，求大家帮帮忙
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit wr=P2^5;
sbit cs1=P2^6;
sbit cs2=P2^7;
uchar code table[]={0xc0,
0xf9,0xa4,0xb0,0x99,0x92,
0x82,0xf8,0x80,0x90,0x88};
void dms(uint);
uchar num;
void display(num)
{
cs1=1;
P0=0xfe;
wr=0;
wr=1;
cs1=0;
cs2=1;
P0=table[num];
wr=0;
wr=1;
cs2=0;
}
void m()
{
uchar tp,k;
P3=0xfe;
tp=P3;
tp=tp&0xf0;
if(tp!=0xf0)
{
dms(10);
tp=P3;
tp=tp&0xf0;
if(tp!=0xf0)
{
tp=P3;
switch(tp)
{
case 0xee:
k=0;
break;
case 0xde:
k=1;
break;
case 0xbe:
k=2;
break;
case 0x7e:
k=3;
break;
}
while(tp!=0xf0)
{
tp=P3;
tp=tp&0xf0;
}
display(k);
}
}
P3=0xfd;
tp=P3;
tp=tp&0xf0;
if(tp!=0xf0)
{
dms(10);
tp=P3;
tp=tp&0xf0;
if(tp!=0xf0)
{
tp=P3;
switch(tp)
{
case 0xed:
k=4;
break;
case 0xdd:
k=5;
break;
case 0xbd:
k=6;
break;
case 0x7d:
k=7;
break;
}
while(tp!=0xf0)
{
tp=P3;
tp=tp&0xf0;
}
display(k);
}
}
P3=0xfb;
tp=P3;
tp=tp&0xf0;
if(tp!=0xf0)
{
dms(10);
tp=P3;
tp=tp&0xf0;
if(tp!=0xf0)
{
tp=P3;
switch(tp)
{
case 0xeb:
k=8;
break;
case 0xdb:
k=9;
break;
case 0xbb:
k=10;
break;
case 0x7b:
k=11;
break;
}
while(tp!=0xf0)
{
tp=P3;
tp=tp&0xf0;
}
display(k);
}
}
}
void dms(uint xms)
{
uint i,j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}
void main()
{
while(1)
{
m();
}
}
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