单片机控制的密码锁设计(含电路图及源程序)

         case 6: //确认键
              if(check_input_pw())
              {//密码正确
               error_num=0;  //密码输入错误次数清零
               //---------
               pw_error=1;   //密码错误指示灯灭            
               relay_open=0; //开锁驱动信号灯亮
               open_lock=0;  //已开锁信号灯亮
               //---------
               delay(50000); //两声短“滴”声
               audio_out=0;
               delay(50000);
               audio_out=1;
               delay(50000);
               audio_out=0;
               delay(50000);
               audio_out=1;
               //---------
               cnt_state=1;  //下一状态处于4秒计时的状态
               TR0=1;     //启动定时
              }
              else
              { if (error_num<2)
                {error_num++; //输入错误次数小于3次时，没错一次error_num增一
                 pw_error=0;  //密码错误指示灯亮
                 //-----------
                 delay(20000);//一声长“滴”声，提示错误
                 audio_out=0;
                 delay(60000);
                 audio_out=1;
                 //-----------
                 init_variant();//清除所有输入，等待下一次输入
                }
                else  //输入错误次数超过3次
                { alarm_out=0; //报警灯亮
                  pw_error=0;  //密码错误指示灯亮
                  error_num=0; //密码输入错误次数清零
                  //----------
                  audio_out=0; //长鸣声报警
                  delay(60000);
                  delay(60000);
                  delay(60000);
                  delay(60000);
                  delay(60000);
                  delay(60000);
                  delay(60000);
                  delay(60000);
                  delay(60000);
                  audio_out=1;
                  //-------------
                  TR1=1;       //打开定时器计时
                  cnt_state=2; //下一状态处于15秒计时的状态
                }
              }
              break;
         case 7://取消键
              init_variant();
              break;
       }
     }
   }
   led_show();
}
}
//-----程序结束-----------------

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本文关键字：单片机  电路图  源程序  密码锁  电子锁，单元电路 - 电子锁