RE: DFU cannot upload merged hex file after changing the starting address

bjorn-spockeli — Thu, 13 Oct 2016 13:41:37 GMT

Hi Muckesh, you need to replace DFU_BANK_0_REGION_START with 0x249f0 in the two if statements before NVIC_SystemReset() in main, i.e.

  if (dfu_start || (!bootloader_app_is_valid(0x249f0)))
    {
        nrf_gpio_pin_clear(UPDATE_IN_PROGRESS_LED);

        // Initiate an update of the firmware.
        err_code = bootloader_dfu_start();
        APP_ERROR_CHECK(err_code);

        nrf_gpio_pin_set(UPDATE_IN_PROGRESS_LED);
    }

    if (bootloader_app_is_valid(0x249f0) && !bootloader_dfu_sd_in_progress())
    {
        // Select a bank region to use as application region.
        // @note: Only applications running from DFU_BANK_0_REGION_START is supported.
        bootloader_app_start(0x249f0);//DFU_BANK_0_REGION_START
    }

You also have to edit the bootloader_app_startfunction, as the argument app_addr is not used, i.e.

void bootloader_app_start(uint32_t app_addr)
{
    // If the applications CRC has been checked and passed, the magic number will be written and we
    // can start the application safely.
    uint32_t err_code = sd_softdevice_disable();
    APP_ERROR_CHECK(err_code);

    interrupts_disable();

    err_code = sd_softdevice_vector_table_base_set(0x249f0);//CODE_REGION_1_START
    APP_ERROR_CHECK(err_code);

    bootloader_util_app_start(0x249f0);//CODE_REGION_1_START
}

-Best regards

Bjørn