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/** ************************************************************************** * @file readme.txt * @version v2.0.4 * @date 2022-04-02 * @brief readme ************************************************************************** */ this demo is based on the at-start board, in this demo, have two project targets: transmit and receive. the demo provides a basic communication with irda mode. if received data right ,the led4 will turn on. set-up - use usart2 tx pin (pa2) and rx pin (pa3)