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#include <reg52.h>
#define uint8 unsigned char
#define uint16 unsigned int
//數碼管編碼。
uint8 code SEG7LED[26] = {0x3f,0x06,0x5b,0X4F,
0x66,0x6D,0x7D,0x07,
0x7F,0x6F,0x77,0x7C,
0x39,0x5E,0x79,0x71,
0x00,0x40,0xff,
0x3f,0x73,0x79,0x37, //open
0x79,0x77,0x77}; //err
//變量聲明
uint8 Ge,Shi,Bai,Qian;//數碼管各個位
uint8 WeiNum=1;
uint8 code P1Pin[9] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f,0xff};
uint8 state=0;//記錄密碼鎖狀態,0為待機狀態，1為輸入密碼，2,3為設置密碼
uint8 InputNum=1;//記錄輸入密碼時，目前密碼的位數。
uint8 InPassWord[4];
uint8 PassWord[4]={0,0,0,0};
//函數聲明
void initTimer0();
void display(uint8 WeiNum);
uint8 keyscan();
void delayms(uint16 Xms);
void password(uint8 key);
uint8 Compare(uint8 InPassWord[4]);
void main()
{
uint8 key;
initTimer0();
while(1)
{
key = keyscan();
password(key);
}
}
void initTimer0()
{
EA = 1;
ET0 = 1;
TMOD = 0X01;
TH0 = (65535-5000)/256;
TL0 = (65535-5000)%256;
TR0 = 1;
}
void Timer0() interrupt 1
{
TH0 = (65535-5000)/256;
TL0 = (65535-5000)%256;
display(WeiNum);
WeiNum ++;
if(WeiNum==5)
WeiNum = 1;
}
void display(uint8 WeiNum)
{
switch(WeiNum)
{
case 1:
{
P2 = 0xff;
P0 = SEG7LED[Qian];
P2 = 0xfe;
break;
}
case 2:
{
P2 = 0xff;
P0 = SEG7LED[Bai];
P2 = 0xfd;
break;
}
case 3:
{
P2 = 0xff;
P0 = SEG7LED[Shi];
P2 = 0xfb;
break;
}
case 4:
{
P2 = 0xff;
P0 = SEG7LED[Ge];
P2 = 0xf7;
break;
}
default:
{
P2 = 0xff;
P0 = 0xff;
P2 = 0xff;
break;
}
}
}
void delayms(uint16 Xms)
{
uint16 i,j;
for(i=Xms;i>0;i--)
for(j=110;j>0;j--);
}
uint8 keyscan()
{
uint8 i=0;
uint8 key8=0xff;
uint8 key=0xff;
uint8 Button;
for(i=0;i<4;i++)
{
P1 = P1Pin[ i];
Button = P1;
if(Button != P1Pin[ i])
{
delayms(5);
Button = P1;
if(Button != P1Pin[ i])
{
key8 = Button;
}
while(Button != P1Pin[ i])
{ Button = P1; }
}
}
switch(key8)
{//0~9數字鍵，12確定，14取消，10輸入密碼，11設置密碼。
case 0xee:{key = 7;break;}
case 0xde:{key = 8;break;}
case 0xbe:{key = 9;break;}
case 0x7e:{key = 10;break;}
case 0xed:{key = 4;break;}
case 0xdd:{key = 5;break;}
case 0xbd:{key = 6;break;}
case 0x7d:{key = 11;break;}
case 0xeb:{key = 1;break;}
case 0xdb:{key = 2;break;}
case 0xbb:{key = 3;break;}
case 0x7b:{key = 15;break;}
case 0xe7:{key = 12;break;}
case 0xd7:{key = 0;break;}
case 0xb7:{key = 14;break;}
case 0x77:{key = 16;break;}
default:{key = 0xff;break;}
}
return key;
}
void password(uint8 key)
{//0~9數字鍵，12確定，14取消，10輸入密碼，11設置密碼。
uint8 i;
if(key!=0xff)
{
switch(state)
{
case 0:
{
if(key == 10)
{
state = 1;
Ge =17;Shi=17;Bai=17;Qian=17;
}
else if(key == 11)
{
state = 2;
Ge =17;Shi=17;Bai=17;Qian=17;
}
break;
}
case 1:
{
if(key>=0 && key <= 9)
{
switch(InputNum)
{
case 1:
Ge = key;InPassWord[0]=key;
break;
case 2:
Shi = key;InPassWord[1]=key;
break;
case 3:
Bai = key;InPassWord[2]=key;
break;
case 4:
Qian =key;InPassWord[3]=key;
break;
default:
break;
}
if(InputNum<5)
InputNum++;
}
else if(key == 12)
{
if(Compare(InPassWord))
{
Ge =22;Shi=21;Bai=20;Qian=19;
for(i=0;i<4;i++)
InPassWord[ i] = 0xff;
}//open
else
{ Ge =16;Shi=25;Bai=24;Qian=23;}//err
delayms(1000);
InputNum =1;
state = 0;
}
else if(key == 14)
{
Ge =18;Shi=18;Bai=18;Qian=18;//全亮
delayms(1000);
state = 0;
InputNum =1;
}
break;
}
case 2:
{
if(key>=0 && key <= 9)
{
switch(InputNum)
{
case 1:
Ge = key;InPassWord[0]=key;
break;
case 2:
Shi = key;InPassWord[1]=key;
break;
case 3:
Bai = key;InPassWord[2]=key;
break;
case 4:
Qian =key;InPassWord[3]=key;
break;
default:
break;
}
if(InputNum<5)
InputNum++;
}
else if(key == 12)
{
if(Compare(InPassWord))
{ Ge =15;Shi=15;Bai=15;Qian=15;
for(i=0;i<4;i++)
InPassWord[ i] = 0xff;
state =3;
}//ffff
else
{ Ge =16;Shi=25;Bai=24;Qian=23;
state =0;
}//err
delayms(1000);
InputNum =1;
}
else if(key == 14)
{
Ge =18;Shi=18;Bai=18;Qian=18;//全亮
delayms(1000);
state = 0;
InputNum =1;
}
break;
}
case 3:
{
if(key>=0 && key <= 9)
{
switch(InputNum)
{
case 1:
Ge = key;PassWord[0]=key;
break;
case 2:
Shi = key;PassWord[1]=key;
break;
case 3:
Bai = key;PassWord[2]=key;
break;
case 4:
Qian =key;PassWord[3]=key;
break;
default:
break;
}
if(InputNum<5)
InputNum++;
}
else if(key == 12)
{
Ge =16;Shi=16;Bai=16;Qian=16;
delayms(250);
Ge =17;Shi=17;Bai=17;Qian=17;
delayms(250);
Ge =16;Shi=16;Bai=16;Qian=16;
delayms(250);
Ge =17;Shi=17;Bai=17;Qian=17;
state = 0;
InputNum =1;
}
else if(key ==14)
{
Ge =18;Shi=18;Bai=18;Qian=18;//全亮
delayms(1000);
for(i=0;i<4;i++)
PassWord[ i] = InPassWord[ i];
state = 0;
InputNum =1;
}
}
}
}
else//如果沒有按鍵按下
{
if(state == 0)
{
Ge =16;Shi=16;Bai=16;Qian=16;//不顯示
}
}
}
uint8 Compare(uint8 InPassWord[4])
{
uint8 i;
uint8 out=1;
for (i=0;i<4;i++)
if(InPassWord[ i]==PassWord[ i])
out = out & 1;
else
out = 0;
return out;
}

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