* Place your implementation of fputc here */ * Retargets the C library printf function to the USART. #define PUTCHAR_PROTOTYPE int _io_putchar(int ch) This code will redirect the output of the printf function to the USART2. printf function is calling fputc to transmit the output via the USART.Saving the project will generate the code.Make sure the USART2 alternate functions have been mapped to PA2 and P3 which are connected to the TX and RX pins (respectively) of the ST-LINK on the Nucleo board.It should be configured in Asynchronous mode with the following settings as shown below in the red rectangles:.First make sure USART2 is activated as shown here:.By default, this was configured when starting the project from the Nucleo board that was selected.Make sure USART2 has been selected, configured, and mapped to PA2 and PA3 as shown below:.Initialize all peripherals with their default settings:.
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