单片机控制的密码锁设计(含电路图及源程序)

文章摘要： 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_

单片机控制的密码锁设计(含电路图及源程序),标签：单片机开发,单片机原理,单片机教程,http://www.88dzw.com
               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);

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