nRFready desktop 2 With Printf

[Atlas]

Hi I want to use Printf() in the DT2 but it cannot output msg to terminal. I used hal_uart_config() to config UART TX/RX/Baudrate... in mail.c then call hal_uart_put_str("123\n"); and it can show "123" on Terminal but call Printf("123\n") and it cannot show "123" on terminal.

Could you tell me why?

Atlas

[Anders Strand]

Hi. Have you included stdio.h? Printf will print to stdout, which means that a printf to stdout must be mapped to printing to the uart. The function fputc must implement hal_uart_put_str(). You can see how this is done inside retarget.c in for example the nus example.

int fputc(int ch, FILE * p_file)
{
    UNUSED_PARAMETER(p_file);

    UNUSED_VARIABLE(app_uart_put((uint8_t)ch));
    return ch;
}