RE: SDK9.0 DFU

bjorn-spockeli — Tue, 10 Jan 2017 07:43:05 GMT

Happy to help Yangying :) I would appreciate if you could mark the answer as correct by clicking the checkmark in the circle to the left of the answer.

RE: SDK9.0 DFU

FormerMember — Tue, 10 Jan 2017 02:41:17 GMT

hello friend，thank you so much！problem is solved with your help ！hope you have a good day！

RE: SDK9.0 DFU

bjorn-spockeli — Mon, 09 Jan 2017 10:32:27 GMT

This is the expected behavior you will get by setting dfu_start |= true;, i.e. dfu_start is always true. If you take a look at the code you'll see that you will always enter the following statement

 if (dfu_start || (!bootloader_app_is_valid(DFU_BANK_0_REGION_START)))
    {
        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 you do not have a bootloader button in you design then I suggest that you just remove the line, i.e. alter the code from

dfu_start  = app_reset;
dfu_start |= ((nrf_gpio_pin_read(BOOTLOADER_BUTTON) == 0) ? true: false);

dfu_start  = app_reset;

Best regards

Bjørn