用24C04与单片机设计电子密码锁程序+Protues仿真 1602LCD显示 -

//-----------------------------------------------------------------
//原始程序中相邻两位密码不能相同.
//本压缩包中的HEX由修改后的新程序编译生成,允许输入任意密码.
//-----------------------------------------------------------------
//实训100例中本例内的main函数可用以下代码替换.
//改动的主要是main函数中while循环内的代码.
//-----------------------------------------------------------------
// 主程序
//-----------------------------------------------------------------
void main()
{
uchar i = 0;
uchar IIC_Password[10];
uchar IS_Valid_User = 0;
P0 = 0xFF;
P1 = 0xFF;
P2 = 0xFF;
TMOD = 0x02; //T0设置为8位自动重装模式
TH0 = 175;
TL0 = 175;
TR0 = 1; //启动T0
DelayMS(10);
LCD_Init(); //初始化LCD
IIC_24C04_Init(); //初始化24C04
Display_String(Title_Text,0x00); //在第1行显示标题
//24C04的内容已由初始化BIN文件导入
//将24C04中预先写入的密码读入pass
RecString(0xa0, 0 , IIC_Password, 6);
IIC_Password[6] = '\0';
while(1)
{
P1 = 0xF0;
if(P1 != 0xF0) KeyNo = Keys_Scan(); //扫描键盘获取键序号KeyNo
switch ( KeyNo )
{
case 0: case 1: case 2: case 3: case 4:
case 5: case 6: case 7: case 8: case 9:
if ( i<= 5 ) //密码限制在6位以内
{
//如果i为0则执行一次清屏
if (i ==0) Display_String(" ",0x40);
UserPassword[i] = KeyNo + '0';
UserPassword[i+1] = '\0';
DSY_BUFFER[i] = '*';
DSY_BUFFER[i+1] = '\0';
Display_String(DSY_BUFFER,0x40);
i++;
}
break;
case 10: //按A键开锁
if (strcmp(UserPassword,IIC_Password) == 0)
{
LED_OPEN = 0; //点亮LED
Clear_Password();
Display_String("Unlock OK! ",0x40);
IS_Valid_User = 1;
}
else
{
LED_OPEN =1; //关闭LED
Clear_Password();
Display_String("ERROR ! ",0x40);
IS_Valid_User = 0;
}
i = 0;
break;
case 11: //按B键上锁
LED_OPEN =1;
Clear_Password();
Display_String(Title_Text,0x00);
Display_String(" ",0x40);
i = 0;
IS_Valid_User = 0;
break;
case 12: //按C键设置新密码
//如果是合法用户则提示输入新密码
if ( !IS_Valid_User ) Display_String("No rights !",0x40);
else
{
i = 0;
Display_String("New Password: ",0x00);
Display_String(" ",0x40);
}
break;
case 13: //按D键保存新密码
if ( !IS_Valid_User ) Display_String("No rights !",0x40);
else
{
SendString(0xa0, 0 , UserPassword, 6);
//重新读入刚写的密码
RecString(0xa0, 0 , IIC_Password, 6);
IIC_Password[6] = '\0';
i = 0;
Display_String(Title_Text,0x00);
Display_String("Password Saved! ",0x40);
}
break;
case 14: //按E键消除所有输入
i = 0;
Clear_Password();
Display_String(" ",0x40);
}
Beep();
DelayMS(100);
P1= 0xF0;
while (P1 != 0xF0); //如果有键未释放则等待
while (P1 == 0xF0); //如果没有再次按下按键则等待
}
}

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