本程序是基于51单片机的I/O口输出嘀嘀嘀间断声光报警信号试验，单片机教程：http://www.ipbb.cn,谢谢！-This program is 51 microcontroller I/O port output Didi tick intermittent sound and light alarm signal test, microcontroller tutorial: http://www.ipbb.cn, thank you!