uart 44b0 rs232 send receive

linux环境下通过UART控制GPRS模块收发数据，包括各种菜单。-GPRS module to send and receive data through the UART control in the linux environment, including a variety of menu.

1 支持串口收发 2 支持串口数据解析 3 支持自定义发送数据(1 can read/write usart data 2 can analysis data from uart 3 can custom data to send)

在树莓派或其他Linux系统下与单片机通信。以/dev/TTYUSB0为例，附带单片机uart.c可以将由串口发给单片机的字符串原样由串口发回。(In raspberry pie or other Linux system, it communicates with MCU. Taking / dev / ttyusb0 as an example, UART. C with MCU can send the string sent from serial port to MCU back fr