HOW TO DEBUG NRF52832 USING MINICOM ON UBUNTU(/dev/ttyACM0)

[JAGADEESH DADI]

hai, i am using sdk-v-12.3.0 for nrf52832-pca10040,

I connected the SOC to PC using Daplink.Now,i want to just print "hello world " on the /dev/ttyACM0.could any one please assist me.

[Håkon Alseth]

Hi,

 

Your user must be in the dialout group in order to access the ttyACM* device:

sudo usermod -a -G dialout <username>

After this, you must reboot.

 

If it still does not work, please check the uart pin out of the project that you've flashed onto the device matches the required pin-out for your DAPLink.

 

Cheers,

Håkon

[JAGADEESH DADI]

I went with your suggestions,but no luck.could you please post any working UART HEX file and a  softdevice

[Håkon Alseth]

If you are using the nRF52-DK, then you can load the SDK example peripheral/uart, and it shall output "Start:" at the beginning.

Try the reset the board and see if the string appears again.

I haven't used minicom before, but make sure that you set the correct baud, 115k2, then open the ttyACMx.

Putty or screen ("screen /dev/ttyACMx 115200") can also be used to open the serial port.

 

Best regards,

Håkon

[JAGADEESH DADI]

Is it fine if i just compile and flash or i need to modify any configurations related to UART in "main.c" or "Sdk_config.h" files before compilation?

[Håkon Alseth]

The project is setup with the UART pins corresponding to the nRF52-DK. If you are testing with the nRF52-DK, then you can compile and flash as-is.

[JAGADEESH DADI]

No luck.Its like hell.waste of time

[Håkon Alseth]

When you mention that you use daplink, do you mean using the nRF52-DK with this firmware instead of the default segger fw?

nRF5x-OB-mbed-IF

Could you try to use segger's firmware instead and see if that works?

nRF5x-OB-JLink-IF

[JAGADEESH DADI]

Finally myself i did R&D and solved the problem.its all about changing the pin numbers in main.c and some configurations related to UART in sdk_config.h.Below was the change in my main.c file

static void uart_init(void)
{
    uint32_t err_code;

    const app_uart_comm_params_t comm_params =
      {
        .rx_pin_no    = 30,
        .tx_pin_no    = 29,
        .rts_pin_no   = 2,
        .cts_pin_no   = 28,
        .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
        .use_parity   = false,
        .baud_rate    = UART_BAUDRATE_BAUDRATE_Baud115200
      };

    APP_UART_FIFO_INIT(&comm_params,
                        UART_RX_BUF_SIZE,
                        UART_TX_BUF_SIZE,
                        uart_event_handle,
                        APP_IRQ_PRIORITY_LOWEST,
                        err_code);

    APP_ERROR_CHECK(err_code);
}

And just use printf(); in order to print string

printf("\r\nhello world\r\n");

And also make sure that your sdk_config.h file must be like attached file

5187.sdk_config.h