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51单片机电子密码锁 仿真和程序源代码都有电路原理图可以下载附件打开仿真文件即可看到
51单片机源程序：
- //-----------------------------------------------------------------
- //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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