RE: nRF52840 how to goto DFU when the softdevice has been disabled?

Philip — Thu, 09 Jan 2020 10:19:10 GMT

Thanks, updated to the following which works;

void do_dfu(void)
{
    uint32_t err_code;

    #if LEGACY == true
        NRF_POWER->GPREGRET = 0xB1;
        NVIC_SystemReset();
    #else
        err_code = sd_power_gpregret_clr(0, 0xffffffff);
        VERIFY_SUCCESS(err_code);

        err_code = sd_power_gpregret_set(0, BOOTLOADER_DFU_START);
        VERIFY_SUCCESS(err_code);

        // Signal that DFU mode is to be enter to the power management module
        nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_DFU);
    #endif
}

RE: nRF52840 how to goto DFU when the softdevice has been disabled?

Turbo J — Wed, 08 Jan 2020 17:01:07 GMT

[quote userid="2945" url="~/f/nordic-q-a/56343/nrf52840-how-to-goto-dfu-when-the-softdevice-has-been-disabled"]Is there a way to modify the GPREGRET register and then call a system reset?[/quote]

Just modify NRF_POWER->GPREGRET directly and then call NVIC_SystemReset();