行列式去抖动键盘加串口传送,波特率为9600bps,用于串口调试-C51 programme

密码锁能通过数码管显示行列式键盘中的键码，输入密码正确时发出“滴-”声并开锁，密码不正确则发出“滴-滴-滴-”，五次错误即锁定，不可再试。-Lock through the digital display determinant keyboard key code, enter the password correctly issued a "drop-" sound and unlock the password is incorrect then issued a "drip- drip-