我们宿舍经常忘带钥匙，所以自己用stc89c52弄个密码锁（其实用个stc12c2052那种20个脚的就可以了~），其实还可以加上修改密码的功能，再有可能的话加上那种非接触式ic卡，关于这个ic卡这个自己还不知怎么弄。
非常简单，就是在键盘扫描基础上加几个代码。
[sourcecode language="c"]
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
uchar linshi,key;
sbit bibi=P3^4;
uchar code table[]={
0x3F, //"0"
0x06, //"1"
0x5B, //"2"
0x4F, //"3"
0x66, //"4"
0x6D, //"5"
0x7D, //"6"
0x07, //"7"
0x7F, //"8"
0x6F, //"9"
};
void yanshi(uint x)
{
uchar j;
uint i;
for(i=x;i>0;i--)
for(j=110;j>0;j--);
}
void xianshi(uchar a)
{
P1=0xff;
P2=table[a];
}
void didi(uint a)
{
bibi=0;
yanshi(a);
bibi=1;
yanshi(200);
}
void scan()
{
uchar temp;
P0=0xfe;
temp=P0;
temp=temp&0xf0;
if(temp!=0xf0)
{
yanshi(10);
temp=P0;
temp=temp&0xf0;
if(temp!=0xf0)
{
linshi=linshi+1;
temp=P0;
switch(temp)
{
case 0xee:
key=0;
break;
case 0xde:
key=1;
break;
case 0xbe:
key=2;
break;
case 0x7e:
key=3;
break;
}
while(temp!=0xf0)
{
temp=P0;
temp=temp&0xf0;
}
didi(50);
}
}
P0=0xfd;
temp=P0;
temp=temp&0xf0;
if(temp!=0xf0)
{
yanshi(10);
temp=P0;
temp=temp&0xf0;
if(temp!=0xf0)
{
linshi=linshi+1;
temp=P0;
switch(temp)
{
case 0xed:
key=4;
break;
case 0xdd:
key=5;
break;
case 0xbd:
key=6;
break;
case 0x7d:
key=7;
break;
}
while(temp!=0xf0)
{
temp=P0;
temp=temp&0xf0;
}
didi(50);
}
}
P0=0xfb;
temp=P0;
temp=temp&0xf0;
if(temp!=0xf0)
{
yanshi(10);
temp=P0;
temp=temp&0xf0;
if(temp!=0xf0)
{
linshi=linshi+1;
temp=P0;
switch(temp)
{
case 0xeb:
key=8;
break;
case 0xdb:
key=9;
break;
case 0xbb:
key=0;
break;
case 0x7b:
key=1;
break;
}
while(temp!=0xf0)
{
temp=P0;
temp=temp&0xf0;
}
didi(50);
}
}
}
void main()
{
uchar pd[]={1,5,8,7,5,5};
uchar haha[6];
linshi=0;
while(1)
{
scan();
if(linshi==0)
scan();
if(linshi==1)
{
haha[0]=key;
xianshi(haha[0]);
}
if(linshi==2)
{
haha[1]=key;
xianshi(haha[1]);
}
if(linshi==3)
{
haha[2]=key;
xianshi(haha[2]);
}
if(linshi==4)
{
haha[3]=key;
xianshi(haha[3]);
}
if(linshi==5)
{
haha[4]=key;
xianshi(haha[4]);
}
if(linshi==6)
{
haha[5]=key;
xianshi(haha[5]);
if(haha[5]==pd[5]&&haha[4]==pd[4]&&haha[3]==pd[3]&&haha[2]==pd[2]&&haha[1]==pd[1]&&haha[0]==pd[0])
didi(700);
else
{
didi(700);
didi(700);
}
linshi=0;
}
}
}
[/sourcecode]
