本代码是在Keil uVision3环境下使用c语言编程作用是使用串口调试助手与单片机通信，使用max232进行电平转换后进行通信。-The code is in the Keil uVision3 environment the role of c language programming is the use of single-chip serial debugging assistant and communications, the use of level translators max232 to communicate after.