redout

代码说明：

  红外报警器的c代码。 基于清翔电子的c51单片机最小开发板开发，代码带有注释。如果不布置外围红外电路，IO口检测到低电平触发蜂鸣器报警。必须有液晶1602才能正常运行程序，不然需要注释掉LCD相关代码。(Infrared alarm c code. Based on Qingxiang electronic C51 microcontroller development board, the code with notes. If the peripheral infrared circuit is not arranged, the low level trigger buzzer alarm is detected at the IO port. There must be liquid crystal 1602 to run the program normally, otherwise you need to annotate the LCD related code.)