新人求助,51单片机一直响,是电位错了还是端口接错了 -

#include<AT89x52.h>
unsigned int num=10; //开始让数码管什么都显示
bit set=0; //定义设置密码的位
char count=-1; //开始让COUNT=-1,方便后面显示数码管
sbit Beep=P2^3; //蜂鸣器
unsigned char temp;
unsigned char pws[6]={1,2,3,4,5,6}; //原始密码
unsigned char pwx[6]; //按下的数字存储区
bit rightflag; //密码正确标志位
unsigned char workbuf[6];
unsigned char code tabledu[]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00,0x40
}; //段选码,共阴极
unsigned char code tablewe[]={
0xfe,0xfd,0xfb,0xf7,0xef,0xdf
}; //位选码
unsigned int keyscan();
void delay(unsigned char z) //延时,ms级
{
unsigned char y;
for(;z>0;z--)
for(y=120;y>0;y--);
}
void setpw() //设置密码函数
{
keyscan();
}
unsigned int keyscan() //键盘扫描函数
{
P3=0xfe;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(5); //键盘去抖,最好20ms以上,这里用了5ms
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
count++;//按键计数加1
temp=P3;
switch(temp)
{
case 0xee:
{
num=7;
if(count<6) //六位密码,所以COUNT<6
{
if(set==0) //设置密码键没有按下时
pwx[count]=num; //存储按下的数字
}
}
break;
case 0xde:
{
num=8;
if(count<6) //以下扫描键盘的原理差不多同上
{
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) //按键抬起检测
{
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; //确定键按下检测
case 0x77: //复位键或者输入密码全部一次删除
{
P1_1=0; //锁关
P1_3=1; //密码设置指示灯灭
set=0; //不设置密码
num=10; //num复位
count=-1; //COUNT复位
workbuf[0]=tabledu[10]; //第一位数码管不显示
workbuf[1]=tabledu[10]; //第二位数码管不显示
workbuf[2]=tabledu[10];
workbuf[3]=tabledu[10];
workbuf[4]=tabledu[10];
workbuf[5]=tabledu[10]; //......
P1_0=1; //锁关
}
break;
case 0xb7: //输入密码删除键(一位一位删除)
{
count--;
workbuf[count]=0x00; //因确定键按下时,COUNT也会加1,而确定键不是密码,所以这里是COUNT,而不是COUNT+1
count--; //因确定键按下时,确定键不是密码,COUNT也会加1,这里COUNT再自减1
if(count<=-1)
count=-1;
}
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
return(num);
}
void init() //利用定时显示数码管
{
TMOD=0x01;
TH0=(65536-500)/200;
TL0=(65536-500)%200;
ET0=1;
EA=1;
TR0=1;
}
bit compare() //密码比较函数
{
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; //锁关
while(1)
{
keyscan();
if(num==20) //如果确定键按下(输入密码的确定键)
{
if(count==6)
{
{
compare();
if(rightflag==1) //如果密码正确
{
workbuf[0]=tabledu[8]; //数码管第一位显示"8"
workbuf[1]=tabledu[8]; //数码管第二位显示"8"
workbuf[2]=tabledu[8];
workbuf[3]=tabledu[8];
workbuf[4]=tabledu[8];
workbuf[5]=tabledu[8]; //......
for(i=0;i<1000;i++) //密码正确报警
{
for(j=0;j<80;j++);
Beep=~Beep;
}
}
else
{
workbuf[0]=0X71; //数码管第一位显示"F"
workbuf[1]=0X71;
workbuf[2]=0X71;
workbuf[3]=0X71;
workbuf[4]=0X71;
workbuf[5]=0X71; //......
break;
}
}
}
else //若输入的密码位数不为6位时
{
workbuf[0]=0X71; //数码管第一位显示"F"
workbuf[1]=0X71;
workbuf[2]=0X71;
workbuf[3]=0X71;
workbuf[4]=0X71;
workbuf[5]=0X71;
break;
}
}
}
}
void timer0() interrupt 1 //数码管驱动函数
{
unsigned char i;
TH0=(65536-500)/200;
TL0=(65536-500)%200;
for(i=0;i<6;i++)
{
P0=workbuf[i]; //送出显示内容
P2=tablewe[i]; //选中显示的行
delay(5);
P0=0;
}
}

复制代码