在ARM9等开发板上调试GSM等串口模块的工具，实现最基本的minicom功能，程序本身会为每条命令加上\r，如果不需要，请自己修改程序，无退格功能。-ARM9 development board such as in GSM and other debugging tools for serial modules, minicom to achieve the most basic functions, the process itself for each command with \ r,