基于51单片机的电子密码锁

资料下载地址：基于51单片机电子密码锁

概要

仿真

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程序流程图

程序

void main()
{  
    unsigned char i,j=0,num=0,count=0;

        LCD_Init();                               //显示屏初始化
    Timer0_Init();                            //定时器初始化

    LCD_Write_Cmd(0x0F);                      //光标闪烁
    LCD_Write_Str(0,0,"FireFly Sci&Tech");    //初始显示界面
    LCD_Write_Str(4,1,"Welcome!");


    while(1)
    {        
        Key_Num = KeyPro();

        if(time_flag)                             //定时器计时10S，返回初始界面
        {                                         //关闭定时器
            TR0 = 0;                              //定时标志位清零
            time_flag = 0;
            change_time =10;
            Set_password = 0;
            Unlock_Led = 0;
            Beep = 0;

            LCD_Write_Cmd(0x01);                     //清屏，并返回初始界面
            LCD_Write_Str(0,0,"FireFly Sci&Tech");
            LCD_Write_Str(4,1,"Welcome!");
        }
        if(Key_Num >= 12)                           //按键值是否大于12
        {
            if(Key_Num == 12)                       //输入按键是否按下
            {
                LCD_Write_Cmd(0x01);                //清屏，并进入输入界面
                DelayMs(5);   
                LCD_Write_Str(1,0,"PassWord:");

                TR0 = 0;                            //关闭定时器，重新设定定时时间，
                time_flag = 0;
                change_time =10;
                input_flag = 1;                      //输入标志位置1
                Unlock_Led = 0;                      //开锁显示灯灭
                num = 0;
                i = 0;     
            }
            else if(Key_Num == 13)                     //确认按键是否被按下
            {
                if(num == 6)                           //输入密码长度是否为6位
                {
                    if(change_flag)                    //修改密码标志位真
                    {
                        change_flag = 0;

                        for(j = 0; j < 6; j++)             //将密码从中间数组导入密码存储数组
                        {
                            Pass_Word[j] = Pass_Temp[j];
                        }

                        LCD_Write_Cmd(0x01);                //清屏，并进入密码修改成功界面
                        LCD_Write_Str(2, 0, "SET Success!");
                    }
                    else if(input_flag)
                    {
                        if(memcmp(Pass_Num, Pass_Word, 6) == 0)      //将输入的密码与设置的密码进行比对
                        {
                            LCD_Write_Cmd(0x01);                       //清屏，并进入密码输入正确界面
                            LCD_Write_Str(1, 0, "PassWord Right");
                            LCD_Write_Str(2, 1, "Door unlock");

                            Set_password = 1;                          //设定密码，10秒内可修改
                            Unlock_Led = 1;                            //开锁显示灯亮
                            input_flag = 0;
                        }
                        else
                        {
                            LCD_Write_Cmd(0x01);                   //清屏，并进入密码输入错误界面
                            DelayMs(5);
                            LCD_Write_Str(1, 0, "PassWord Error");
                            change_time =10;
                            TR0 = 1;
                            Unlock_Led = 0;                           

                            while(!time_flag)
                            {
                                Unlock_Led = ~Unlock_Led;
                                Beep = ~Beep;         //板子为无源蜂鸣器
                                DelayUs2x(100);
                            }   
                        }
                    }
                    change_time =10;      //重新赋值定时时间，开定时器，输入计数和显示位置计数清零
                    TR0 = 1;
                    num = 0;
                    i = 0;   
                }
            }
            else if(Key_Num == 14)         //修改密码按键
            {
                if(Set_password)           //如果在设定密码时间内
                {
                    LCD_Write_Cmd(0x01);        //清屏，进入修改密码界面
                    DelayMs(5);
                    LCD_Write_Str(1, 0, "New PassWord:");
                    TR0 = 0;
                    time_flag = 0;
                    change_time =10;
                    change_flag = 1;
                    input_flag = 0;
                    Set_password = 0;
                    num = 0;
                    i = 0;     
                }   
            }
            else if(Key_Num == 15)             //取消修改密码
            {
                if(change_flag)
                {
                    LCD_Write_Cmd(0x01);
                    DelayMs(5);
                    LCD_Write_Str(1, 0, "Cancel Change!");
                    TR0 = 1;
                    change_flag = 0;
                    num = 0;
                    i = 0;   
                }   
            }

        }

资料内容

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