基于51单片机的电子密码锁系统设计制作，电路图+源程序 -

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
void key_scan();
uchar count0,count1,count3,num,n=0,temp,a,j,count4;
uchar mima[8]; //初始密码存储区
uchar tab_key[50]; //输入密码存储区
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
bit enterflag; //确认键按下与否的标志
bit mimaflag; //密码正确与否的标志
bit xiugaiflag; //修改密码标志
bit enter1flag; //修改密码确认键标志
sbit red=P3^7;
sbit bell=P3^6;
sbit rs=P2^0;
sbit rw=P2^1;
sbit lcden=P2^2;
sbit scl=P3^4;
sbit sda=P3^5;
uchar code table1[]="input the passco";
uchar code table2[]="de: --------";
uchar code table3[]="*";
uchar code table4[]="right (^_^) ";
uchar code table5[]="first error!!!!";
uchar code table6[]="second error!!!!";
uchar code table7[]="third error see ";
uchar code table8[]="u tomorrow (^_^)";
uchar code table9[]="define the passc";
uchar code table10[]="ode: --------";
uchar code table11[]="code is new";
//******************************键盘消抖函数*******************************
void delay1()
{ ;; }
void delay2(uchar x)
{
uchar a,b;
for(a=x;a>0;a--)
for(b=100;b>0;b--);
}
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
//****************************e^2room的初始化*******************************
void start() //开始信号
{
sda=1;
delay1();
scl=1;
delay1();
sda=0;
delay1();
}
void stop() //停止
{
sda=0;
delay1();
scl=1;
delay1();
sda=1;
delay1();
}
//****************************应答信号*************************************
void respond()
{
uchar i;
scl=1;
delay1();
while((sda==1)&&(i<250))i++;
scl=0;
delay1();
}
//*****************************写字节操作函数**********************************
void write_byte(uchar date)
{
uchar i,temp;
temp=date;
for(i=0;i<8;i++)
{
temp=temp<<1; //保持最高位，左移到进位CY
scl=0;
delay1();
sda=CY;
delay1();
scl=1;
delay1();
}
scl=0;
delay1();
sda=1;//总线释放
delay1();
}
//*******************************读字节操作函数*****************************
uchar read_byte()
{
uchar i,k;
scl=0;
delay1();
sda=1;
delay1();
for(i=0;i<8;i++)
{
scl=1;
delay1();
k=(k<<1)|sda; //或运算，放到最低位
scl=0;
delay1();
}
return k;
}
//**********************************写地址函数******************************
void write_add(uchar address,uchar date)
{
start();
write_byte(0xa0);
respond();
write_byte(address);
respond();
write_byte(date);
respond();
stop();
}
//*******************************读地址函数*************************************
uchar read_add(uchar address)
{
uchar date;
start();
write_byte(0xa0);
respond();
write_byte(address);
respond();
start();
write_byte(0xa1);
respond();
date=read_byte();
stop();
return date;
}
//****************************LCD1602的初始化*******************************
void write_com(uchar com)
{
rs=0;
lcden=0;
P0=com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void write_date(uchar date)
{
rs=1;
lcden=0;
P0=date;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
//***************************************密码比较函数********************************
bit mimacmp()
{
bit flag;
uchar i;
for(i=0;i<8;i++)
{
if(mima[i]==tab_key[i])
flag=1;
else
{
flag=0;
i=8;
}
}
return(flag); //返回flag
}
////**********************************LCD显示函数开始**************************************
void lcd_display()
{
uchar i=0;
write_com(0x80+0x40+8);
for(i=0;i<n;i++)
{
write_date(table3[0]);
}
}
//****************************************键盘功能分配函数群开始****************************
//** 0 ** 1 **2 ** 3**
//** 4** 5** 6 **7 **
//**8** 9** 确认（A） **无效（B）
//**取消（C）**修改密码键（D）**确认修改键（E）**无效（F）
void key_manage1()
{
tab_key[n]=0;
n++;
if(xiugaiflag==1)
{
mima[count4]=0;
count4++;
}
}
void key_manage2()
{
tab_key[n]=1;
n++;
if(xiugaiflag==1)
{
mima[count4]=1;
count4++;
}
}
void key_manage3()
{
tab_key[n]=2;
n++;
if(xiugaiflag==1)
{
mima[count4]=2;
count4++;
}
}
void key_manage4()
{
tab_key[n]=3;
n++;
if(xiugaiflag==1)
{
mima[count4]=3;
count4++;
}
}
void key_manage5()
{
tab_key[n]=4;
n++;
if(xiugaiflag==1)
{
mima[count4]=4;
count4++;
}
}
void key_manage6()
{
tab_key[n]=5;
n++;
if(xiugaiflag==1)
{
mima[count4]=5;
count4++;
}
}
void key_manage7()
{
tab_key[n]=6;
n++;
if(xiugaiflag==1)
{
mima[count4]=6;
count4++;
}
}
void key_manage8()
{
tab_key[n]=7;
n++;
if(xiugaiflag==1)
{
mima[count4]=7;
count4++;
}
}
void key_manage9()
{
tab_key[n]=8;
n++;
if(xiugaiflag==1)
{
mima[count4]=8;
count4++;
}
}
void key_manage10()
{
tab_key[n]=9;
n++;
if(xiugaiflag==1)
{
mima[count4]=9;
count4++;
}
}
//**********************************确认键**************************************************************
void key_manage11()
{
enterflag=1; //确认键按下
if(n==8) //只有输入8个密码后按确认才做比较
mimaflag=mimacmp();
else
mimaflag=0;
if(enterflag==1)
{
enterflag=0;
n=0;
//用FFFFFFFF清除已经输入的密码
for(count3=0;count3<8;count3++)
{
delay(5);
tab_key[count3]=0x0f;
}
TR1=1; //打开计数器1
count1=0; //定时器1由50MS累计到1S所用的计数器
if(mimaflag==1)
{
a=0;
write_com(0x01);
write_com(0x80);
for(count3=0;count3<16;count3++)
{
write_date(table4[count3]); //密码正确，显示RIGHT，绿灯亮
delay(5);
}
}
else
{
n=0;
red=0;
bell=0;
a++;
if(a==1)
{
for(count3=0;count3<8;count3++) //ffffffff清除密码
{
delay(5);
tab_key[count3]=0x0f;
}
write_com(0x01);
write_com(0x80);
for(count3=0;count3<16;count3++)
{
write_date(table5[count3]); //密码错误，显示 first error，红灯亮
delay(5);
}
TR1=1;
}
if(a==2)
{
for(count3=0;count3<8;count3++) //ffffffff清除密码
{
delay(5);
tab_key[count3]=0x0f;
}
write_com(0x01);
write_com(0x80);
for(count3=0;count3<16;count3++)
{
write_date(table6[count3]); //密码错误，显示SECOND ERROR，红灯亮
delay(5);
}
TR1=1;
}
if(a==3)
{
for(count3=0;count3<8;count3++) //ffffffff清除密码
{
delay(5);
tab_key[count3]=0x0f;
}
write_com(0x01);
write_com(0x80);
for(count3=0;count3<16;count3++)
{
write_date(table7[count3]); //密码错误，显示third error see，红灯亮
delay(5);
}
write_com(0x80+0x40);
for(count3=0;count3<16;count3++)
{
write_date(table8[count3]);//密码错误，显示 U TOMORROW ,红灯亮
delay(5);
}
TR1=0;
}
}
}
}
void key_manage12()
{
tab_key[n]=11;
n++; //密码计数清零
}
//****************************************************取消键********************************************
void key_manage13()
{
n=0; //密码计数清零
write_com(0x80); //指针所指位置
for(count3=0;count3<16;count3++)
{
write_date(table1[count3]); //第一行显示INPUT THE PASSPORD:
delay(5);
}
write_com(0x80+0x40);
for(count3=0;count3<16;count3++)
{
write_date(table2[count3]); //开机显示--------
delay(5);
tab_key[count3]=0x0f; //用FFFFFFFF清楚已经输入的密码
}
}
//*******************************************修改密码键**********************************
void key_manage14()
{
uchar aa=0;
n=0;
xiugaiflag=1;
write_com(0x01);
write_com(0x80);
for(count3=0;count3<16;count3++)
{
write_date(table9[count3]); //显示define the password
delay(5);
tab_key[count3]=0x0f; //用FFFFFFFF清楚已经输入的密码
}
write_com(0x80+0x40);
for(count3=0;count3<16;count3++)
{
write_date(table10[count3]); //显示--------
delay(5);
}
TR0=1;
}
//******************************************修改密码键的确认键********************************
void key_manage15()
{
n=0;
enter1flag=1;
if(enter1flag==1)
{
enter1flag=0;
count4=0;
for(count3=0;count3<16;count3++)
{
tab_key[count3]=0x0f; //用FFFFFFFF清楚已经输入的密码
}
write_com(0x01);
write_com(0x80);
for(count3=0;count3<16;count3++)
{
write_date(table11[count3]);
delay(100);
}
TR1=1;
count1=0;
}
}
void key_manage16()
{
tab_key[n]=15;
n++;
}
//****************************************定时器1的50MS,共延时1秒*****************************
void time_1() interrupt 3
{
TH1=(65536-50000)/256;
TL1=(65536-50000)%256;
if(count1<20)
{
count1++;
}
else //计时到1S
{
TR1=0;
count1=0;
mimaflag=0;
red=1;
bell=1;
//显示FFFFFFFF
write_com(0x01);
write_com(0x80);
for(count3=0;count3<16;count3++)
{
write_date(table1[count3]); //显示INPUT THE PASSCODE
delay(5);
}
write_com(0x80+0x40);
for(count3=0;count3<16;count3++)
{
write_date(table2[count3]); //开机显示FFFFFFFF
delay(5);
}
}
}
//***********************************************定时0**********************************************
void time_0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
if(count4<8)
{
key_scan();
}
else
{
TR0=0;
count4=0;
}
}
//初始化函数
void init()
{
uchar i;
lcden=0;
write_com(0x38); //打开显示模式设置
write_com(0x0c); //打开显示，光标等等设置未零
write_com(0x06); //当读或写一个字符后地址指针加一，且光标加一，当写一个字符后整频显示左移，
write_com(0x01); //清零指令
write_com(0x80); //指针所指位置
//定时器初始化
TMOD=0x11; //T0,T1工作方式1
TH0=(65536-2000)/256;
TL0=(65536-2000)%256; //T0初始化2MS
TH1=(65536-50000)/256;
TL1=(65536-50000)%256; //T1初始化50MS
TR1=0;
ET1=1;
EA=1;
TR0=0;
ET0=1;
count0=0; //初始没有密码输入，故为零
enterflag=0; //没有确认键按下
mimaflag=0; //密码正确与否键先置零
red=1; //红灯不亮
//************密码存入EPROM中**********************************
sda=1;
delay(5);
scl=1;
delay(5);
for(i=0;i<8;i++)
{
write_add(i,8);
delay2(100);
}
for(i=0;i<8;i++)
{
mima[i]=read_add(i);
delay(5);
}
}
void main()
{ rw=0;
init();
write_com(0x80); //指针所指位置
for(count3=0;count3<16;count3++)
{
write_date(table1[count3]); //第一行显示INPUT THE PASSPORD:
delay(5);
}
write_com(0x80+0x40);
for(count3=0;count3<16;count3++)
{
write_date(table2[count3]); //开机显示FFFFFFFF
delay(5);
}
while(1)
{
key_scan(); //调用键盘扫描函数
lcd_display();
}
}
//**************************************************键盘扫描函数开始********************************
void key_scan()
{
//**********扫描第一行*********
P1=0xfe;
temp=P1;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(100);
if(temp!=0xf0)
{
temp=P1;
switch(temp)
{
case 0xee:
key_manage1();
break;
case 0xde:
key_manage2();
break;
case 0xbe:
key_manage3();
break;
case 0x7e:
key_manage4();
break;
}
while(temp!=0xf0)
{
temp=P1;
temp=temp&0xf0;
}
}
}
//**************************************************扫描第二行***********************************
P1=0xfd;
temp=P1;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(100);
if(temp!=0xf0)
{
temp=P1;
switch(temp)
{
case 0xed:
key_manage5();
break;
case 0xdd:
key_manage6();
break;
case 0xbd:
key_manage7();
break;
case 0x7d:
key_manage8();
break;
}
while(temp!=0xf0)
{
temp=P1;
temp=temp&0xf0;
}
}
}
//*********************************************扫描第三行***********************************
P1=0xfb;
temp=P1;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(100);
if(temp!=0xf0)
{
temp=P1;
switch(temp)
{
case 0xeb:
key_manage9();
break;
case 0xdb:
key_manage10();
break;
case 0xbb:
key_manage11();
break;
case 0x7b:
key_manage12();
break;
}
while(temp!=0xf0)
{
temp=P1;
temp=temp&0xf0;
}
}
}
//***************************************************扫描第四行****************************************
P1=0xf7;
temp=P1;
temp=temp&0xf0;
if(temp!=0xf0)
{
delay(100);
if(temp!=0xf0)
{
temp=P1;
switch(temp)
{
case 0xe7:
key_manage13();
break;
case 0xd7:
key_manage14();
break;
case 0xb7:
key_manage15();
break;
case 0x77:
key_manage16();
break;
}
while(temp!=0xf0)
{
temp=P1;
temp=temp&0xf0;
}
}
}
}

复制代码