串口与PC通信，即通过SPI控制芯片使数码管显示相应的数字（0-9），使用的是STM32-Serial communication with a PC, through the SPI control chip digital display corresponding to the number (0-9), using the STM32

名称：UART0串口通信实验 功能：数码管显示接收的上位机数据 按任意键发键值到上位机-* Name: the UART0 serial communication experiment** function: digital display the receiver PC data** hair key to press any key to the host computer