用STM32单片机与PC实现USART串口通信，PC通过串口向单片机发送数据，单片机截取#和$间的有用数据又通过串口发送回PC显示。正点原子MiNi版STM32可直接使用-With STM32 MCU and PC to realize serial communication USART, PC through serial port to send data to the single chip microcomputer, microcomputer intercept# $and use