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