Adding Blinky features in my Example

[Anubhav]

Hi,

I am working on a project where I am sending and receiving Encrypted string data from my phone with nRF Toolbox to the nRF52840 DK. The basic paring is established along with bonding.

I am able to send and receive strings from both the sides too. Now I added a button to the nRF Toolbox UART feature.

Now when I press the button an led on the nRF52840 DK should glow. I am done with the app side but I wanted to add the blinky features to the nRF52840. But I am getting a FATAL ERROR.

I didn't do many changes in my code. I just added the below functions to my code can you please tell me the error.

static void led_write_handler(uint16_t conn_handle, ble_lbs_t * p_lbs, uint8_t led_state)
{
    if (led_state)
    {
        bsp_board_led_on(LEDBUTTON_LED);
        NRF_LOG_INFO("Received LED ON!");
    }
    else
    {
        bsp_board_led_off(LEDBUTTON_LED);
        NRF_LOG_INFO("Received LED OFF!");
    }
}

static void services_init(void)
{
    uint32_t err_code;
    ble_nus_init_t     nus_init;
    ble_lbs_init_t     init     = {0};
    
    // Initialize NUS.
    memset(&nus_init, 0, sizeof(nus_init));

    nus_init.data_handler = nus_data_handler;

    err_code = ble_nus_init(&m_nus, &nus_init);
    APP_ERROR_CHECK(err_code);

    //Initialize LBS.
    init.led_write_handler = led_write_handler;

    err_code = ble_lbs_init(&m_lbs, &init);
    APP_ERROR_CHECK(err_code);
}

 

[Fred]

I'm not sure if you know, but the FATAL error as you see in your logging occurs in most cases due to the APP_ERROR_CHECK. So, a quick way of detecting where this occurs is of course to simply add a logging statement before the APP_ERROR statements in your code (or at least where you expect it would go wrong). Printing the location and err_code in most cases will do. Don't forget to place a NRF_LOG_FLUSH() after each logging statement to have it printed before the next statement.

[Anubhav]

Hi,

I possibly knew where the error was but I didn't know how to check for the error. Thanks for providing the solution.

I added the log statement as given below in the services_init function.

NRF_LOG_INFO("The err_code is %d",err_code);
NRF_LOG_FLUSH() ;

static void services_init(void)
{
    uint32_t err_code;
    ble_nus_init_t     nus_init;
    ble_lbs_init_t     init     = {0};
    
    // Initialize NUS.
    memset(&nus_init, 0, sizeof(nus_init));

    nus_init.data_handler = nus_data_handler;

    err_code = ble_nus_init(&m_nus, &nus_init);
    APP_ERROR_CHECK(err_code);

    //Initialize LBS.
    init.led_write_handler = led_write_handler;

    err_code = ble_lbs_init(&m_lbs, &init);
    NRF_LOG_INFO("The err_code is %d",err_code);
    NRF_LOG_FLUSH() ;
    APP_ERROR_CHECK(err_code);
}

From the logs, the err_code is 4 which means No Memory for operation.

What should I do to increase the memory??

The Set Section Placement Macros list is attached below. Can you tell me what should I change in this and by how much?

FLASH_PH_START=0x0
FLASH_PH_SIZE=0x100000
RAM_PH_START=0x20000000
RAM_PH_SIZE=0x40000
FLASH_START=0x26000
FLASH_SIZE=0xda000
RAM_START=0x20003980
RAM_SIZE=0x3c680

[Anubhav]

Hi,

I could rectify the error by going through this thread.

Thank you for guiding me.