电路图下载：http://www.51hei.com/f/51hei-5.pdf
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
sbit d1=P2^3;
uchar num,temp;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0};
void delay(uint);
uchar keyscan();
void init();
main()
{
init();
while(1)
{
dula=1;
P0=table[keyscan()];
dula=0;
if(num==1)
{
d1=0;
}
if(num!=1)
{
d1=1;
if(num==6)
{
d1=0;
delay(50);
d1=1;
delay(50);
}
}
delay(100);
}
}
void delay(uint z)
{
uint x,y;
for(x=100;x>0;x--)
for(y=z;y>0;y--);
}
uchar keyscan()
{
P3=0xfe;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(10);
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xee : num=1;
break;
case 0xde : num=2;
break;
case 0xbe : num=3;
break;
case 0x7e : num=4;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
/*************22222222222************************/
P3=0xfd;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(10);
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xed : num=5;
break;
case 0xdd : num=6;
break;
case 0xbd : num=7;
break;
case 0x7d : num=8;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
/**********333333333************************/
P3=0xfb;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(10);
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xeb : num=9;
break;
case 0xdb : num=10;
break;
case 0xbb : num=11;
break;
case 0x7b : num=12;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
/**********44444************************/
P3=0xf7;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(10);
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xe7 : num=13;
break;
case 0xd7 : num=14;
break;
case 0xb7 : num=15;
break;
case 0x77 : num=16;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
return(num);
}
void init()
{
wela=1;
P0=0xc0;
wela=0;
delay(100);
dula=1;
P0=table[16];
dula=0;
delay(100);
}
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