Kinetis Design Studio中的主题 Re: Retargeting printf in a baremetal project to use a UART

Retargeting printf in a baremetal project to use a UART

oscargarciaabad — Thu, 09 Oct 2014 14:04:30 GMT

Hello all,

I'm developing a new project with a FRDM-KL46Z. In this project I am using no O.S.

This project is under kinetis design studio 1.1.1.

Does anybody know how can I make printf to use a UART for printing?

Thanks a lot!

Regrads,

Oscar.

Re: Retargeting printf in a baremetal project to use a UART

Edrianocarlos — Thu, 09 Oct 2014 14:23:23 GMT

Hi.

I am using FRDM64. but i think it will be similar.

You can starting looking at.

hardware_init.c

void dbg_uart_init(void)
{
    uint32_t i;


    /* enable clock for PORTs */
    for (i = 0; i < HW_PORT_INSTANCE_COUNT; i++)
    {
        CLOCK_SYS_EnablePortClock(i);
    }


    configure_uart_pins(BOARD_DEBUG_UART_INSTANCE);


    DbgConsole_Init(BOARD_DEBUG_UART_INSTANCE, BOARD_DEBUG_UART_BAUD, kDebugConsoleUART);
}

then you can take care the UART configurations. Most of then are in the Board folder.

Re: Retargeting printf in a baremetal project to use a UART

Jorge_Gonzalez — Thu, 09 Oct 2014 15:30:05 GMT

Hello Oscar:

Colleague Erich Styger posted a tutorial about this in his blog. It is for KDS v1.0.1 Beta, but I think it should apply for version v1.1.1:

printf() and scanf() with GNU ARM Libraries | MCU on Eclipse

Regards!,
Jorge Gonzalez

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Re: Retargeting printf in a baremetal project to use a UART

oscargarciaabad — Mon, 13 Oct 2014 10:45:45 GMT

Hello Edriano and Jorge,

First of all: Many thanks for your help.

Edriano, I'm afraid that inizialization in KDS 1.1.1 works diferent.

Jorge, your solution works fantastic!

Best regards,

Óscar.