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#include<AT89x52.h>
unsigned int num=10; //開始讓數碼管什么都顯示
bit set=0; //定義設置密碼的位
char count=-1; //開始讓COUNT=-1,方便后面顯示數碼管
sbit Beep=P2^3; //蜂鳴器
unsigned char temp;
unsigned char pws[6]={1,2,3,4,5,6}; //原始密碼
unsigned char pwx[6]; //按下的數字存儲區
bit rightflag; //密碼正確標志位
unsigned char workbuf[6];
unsigned char code tabledu[]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00,0x40
}; //段選碼,共陰極
unsigned char code tablewe[]={
0xfe,0xfd,0xfb,0xf7,0xef,0xdf
}; //位選碼
unsigned int keyscan();
void delay(unsigned char z) //延時,ms級
{
unsigned char y;
for(;z>0;z--)
for(y=120;y>0;y--);
}
void setpw() //設置密碼函數
{
keyscan();
}
unsigned int keyscan() //鍵盤掃描函數
{
P3=0xfe;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(5); //鍵盤去抖,最好20ms以上,這里用了5ms
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
count++;//按鍵計數加1
temp=P3;
switch(temp)
{
case 0xee:
{
num=7;
if(count<6) //六位密碼,所以COUNT<6
{
if(set==0) //設置密碼鍵沒有按下時
pwx[count]=num; //存儲按下的數字
}
}
break;
case 0xde:
{
num=8;
if(count<6) //以下掃描鍵盤的原理差不多同上
{
if(set==0)
pwx[count]=num;
else
pws[count]=num;
workbuf[count]=tabledu[11];
}
}
break;
case 0xbe:
{
num=9;
{
if(count<6)
{
if(set==0)
pwx[count]=num;
else
pws[count]=num;
workbuf[count]=tabledu[11];
}
}
}
break;
}
while(temp!=0xf0) //按鍵抬起檢測
{
temp=P3;
temp=temp&0xf0;
}
}
}
P3=0xfd;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
count++;
temp=P3;
switch(temp)
{
case 0xed:
{
num=4;
if(count<6)
{
if(set==0)
pwx[count]=num;
else
pws[count]=num;
workbuf[count]=tabledu[11];
}
}
break;
case 0xdd:
{
num=5;
if(count<6)
{
if(set==0)
pwx[count]=num;
else
pws[count]=num;
workbuf[count]=tabledu[11];
}
}
break;
case 0xbd:
{
num=6;
if(count<6)
{
if(set==0)
pwx[count]=num;
else
pws[count]=num;
workbuf[count]=tabledu[11];
}
}
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
P3=0xfb;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
count++;
temp=P3;
switch(temp)
{
case 0xeb:
{
num=1;
if(count<6)
{
if(set==0)
pwx[count]=num;
else
pws[count]=num;
workbuf[count]=tabledu[11];
}
}
break;
case 0xdb:
{
num=2;
if(count<6)
{
if(set==0)
pwx[count]=num;
else
pws[count]=num;
workbuf[count]=tabledu[11];
}
}
break;
case 0xbb:
{
num=3;
if(count<6)
{
if(set==0)
pwx[count]=num;
else
pws[count]=num;
workbuf[count]=tabledu[11];
}
}
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
P3=0xf7;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
count++;
temp=P3;
switch(temp)
{
case 0xd7:
{
num=0;
if(count<6)
{
if(set==0)
pwx[count]=num;
else
pws[count]=num;
workbuf[count]=tabledu[11];
}
}
break;
case 0xe7: num=20;break; //確定鍵按下檢測
case 0x77: //復位鍵或者輸入密碼全部一次刪除
{
P1_1=0; //鎖關
P1_3=1; //密碼設置指示燈滅
set=0; //不設置密碼
num=10; //num復位
count=-1; //COUNT復位
workbuf[0]=tabledu[10]; //第一位數碼管不顯示
workbuf[1]=tabledu[10]; //第二位數碼管不顯示
workbuf[2]=tabledu[10];
workbuf[3]=tabledu[10];
workbuf[4]=tabledu[10];
workbuf[5]=tabledu[10]; //......
P1_0=1; //鎖關
}
break;
case 0xb7: //輸入密碼刪除鍵(一位一位刪除)
{
count--;
workbuf[count]=0x00; //因確定鍵按下時,COUNT也會加1,而確定鍵不是密碼,所以這里是COUNT,而不是COUNT+1
count--; //因確定鍵按下時,確定鍵不是密碼,COUNT也會加1,這里COUNT再自減1
if(count<=-1)
count=-1;
}
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
return(num);
}
void init() //利用定時顯示數碼管
{
TMOD=0x01;
TH0=(65536-500)/200;
TL0=(65536-500)%200;
ET0=1;
EA=1;
TR0=1;
}
bit compare() //密碼比較函數
{
if((pwx[0]==pws[0])&(pwx[1]==pws[1])&(pwx[2]==pws[2])&(pwx[3]==pws[3])&(pwx[4]==pws[4])&(pwx[5]==pws[5]))
rightflag=1;
else
rightflag=0;
return(rightflag);
}
void main()
{
unsigned int i,j;
init();
P0=0;
P1_1=0; //鎖關
while(1)
{
keyscan();
if(num==20) //如果確定鍵按下(輸入密碼的確定鍵)
{
if(count==6)
{
{
compare();
if(rightflag==1) //如果密碼正確
{
workbuf[0]=tabledu[8]; //數碼管第一位顯示"8"
workbuf[1]=tabledu[8]; //數碼管第二位顯示"8"
workbuf[2]=tabledu[8];
workbuf[3]=tabledu[8];
workbuf[4]=tabledu[8];
workbuf[5]=tabledu[8]; //......
for(i=0;i<1000;i++) //密碼正確報警
{
for(j=0;j<80;j++);
Beep=~Beep;
}
}
else
{
workbuf[0]=0X71; //數碼管第一位顯示"F"
workbuf[1]=0X71;
workbuf[2]=0X71;
workbuf[3]=0X71;
workbuf[4]=0X71;
workbuf[5]=0X71; //......
break;
}
}
}
else //若輸入的密碼位數不為6位時
{
workbuf[0]=0X71; //數碼管第一位顯示"F"
workbuf[1]=0X71;
workbuf[2]=0X71;
workbuf[3]=0X71;
workbuf[4]=0X71;
workbuf[5]=0X71;
break;
}
}
}
}
void timer0() interrupt 1 //數碼管驅動函數
{
unsigned char i;
TH0=(65536-500)/200;
TL0=(65536-500)%200;
for(i=0;i<6;i++)
{
P0=workbuf[i]; //送出顯示內容
P2=tablewe[i]; //選中顯示的行
delay(5);
P0=0;
}
}

復制代碼

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