UART setup for thingy52

[ragnarolsson]

Hey I am trying to setup UART on my Thingy52 but when I’m trying to compile my project I getting this error message:

I am using GNU Tools ARM Embedded 4.9 2015q3 for compiling and I am using windows 8.1.

This are the things I have tried for solving this problem:

Added this line to the make file:

$(abspath ../../../external/sdk13/components/libraries/uart/app_uart.c) \

$(abspath ../../../external/sdk13/components/libraries/uart/app_uart_fifo.c) \

$(abspath ../../../external/sdk13/components/libraries/uart/retarget.c) \

INC_PATHS += -I$(abspath ../../../external/sdk13/components/libraries/uart)

 

Added #include "app_uart.h" to the main.c file.

 

This is how my code looks like on the lines 465, 480, 481 were the error occurs:


const app_uart_comm_params_t comm_params =

  {

      ANA_DIG0,

      ANA_DIG1,

      MOS_1,

      MOS_2,

      APP_UART_FLOW_CONTROL_ENABLED,

      false,

      UART_BAUDRATE_BAUDRATE_Baud9600

  };

 

APP_UART_FIFO_INIT(&comm_params,                                //Line 465

                     UART_RX_BUF_SIZE,

                     UART_TX_BUF_SIZE,

                     uart_error_handle,

                     APP_IRQ_PRIORITY_LOWEST,

                     err_code);

 

  APP_ERROR_CHECK(err_code);

 

  #ifndef ENABLE_LOOPBACK_TEST

    printf("\r\nStart: \r\n");

 

    while (true)

    {

        uint8_t cr;

        while (app_uart_get(&cr) != NRF_SUCCESS);                              //Line 480

        while (app_uart_put(cr) != NRF_SUCCESS);                                 //Line 481

 

        if (cr == 'q' || cr == 'Q')

        {

            printf(" \r\nExit!\r\n");

 

            while (true)

            {

                // Do nothing.

            }

        }

    }

#else

 

    // This part of the example is just for testing the loopback .

    while (true)

    {

        uart_loopback_test();

    }

#endif



Can anyone see if i am missing something to get the code compiling succesfully?


Additional information:

I have also tried to add this lines in the sdk_config.h file:

//==========================================================
// <q> APP_FIFO_ENABLED - app_fifo - Software FIFO implementation

#ifndef APP_FIFO_ENABLED
#define APP_FIFO_ENABLED 1
#endif

// <e> APP_UART_ENABLED - app_uart - UART driver
//==========================================================
#ifndef APP_UART_ENABLED
#define APP_UART_ENABLED 1
#endif
#if APP_UART_ENABLED
// <o> APP_UART_DRIVER_INSTANCE - UART instance used

// <0=> 0

#ifndef APP_UART_DRIVER_INSTANCE
#define APP_UART_DRIVER_INSTANCE 0
#endif

#endif //APP_UART_ENABLED
// </e>

// <q> RETARGET_ENABLED - retarget - Retargeting stdio functions

#ifndef RETARGET_ENABLED
#define RETARGET_ENABLED 1
#endif

And when i compile the project i get this error message:

[fierst]

app_uart.c and app_uart_fifo.c define the same functions and thus the linker throws some multiple definition errors. It looks like you want to use the FIFO based on your code so remove app_uart.c from your makefile and that should solve those errors.

As far as the undefined references, make sure you include "nrf_drv_uart.h" (and possibly nrf_drv_uart.c) in your include path (which, in my case, was $SDK_ROOT/integration/nrfx/legacy/nrf_drv_uart.h") as these functions are called from app_uart to do the low-level RX/TX on the UART itself.

[ragnarolsson]

Thanks a lot for the answer i did the things you suggested and also added
INC_PATHS += -I$(abspath ../../../external/sdk13/components/libraries/fifo)
and now I can compile the project.