stm32单片机通过USART1 收发数据通过串口调试软件，向板子发送数据，板子接收到数据后，立即回传给电脑。 库版本 ST3.0.0(STM32 MCU through the USART1 data through the serial debugging software to send data to the board, the board receives the data, immediately back to the computer. Librar