How to enter into DFU mode without button press?

[balaji]

Hi,

how to get into the bootloader mode without pressing any button, when some application is running? I also tried it with setting the NRF_POWER->GPREGRET but it is not working. Is there any other way to achieve this?

i changed the code as follows,

static void on_write(ble_evt_t * p_ble_evt) { ble_gatts_evt_write_t * p_evt_write = &p_ble_evt->evt.gatts_evt.params.write; if (p_evt_write->handle == 3) // device name handle { NRF_POWER->GPREGRET = 1; sd_nvic_SystemReset(); }

whenever the device update occurs, device should enter into the bootloader mode, i changed the bootloader code as follows,

if (bootloader_is_pushed || (!bootloader_app_is_valid(DFU_BANK_0_REGION_START)) || NRF_POWER->GPREGRET == 1) { nrf_gpio_pin_set(LED1); NRF_POWER->GPREGRET = 0; // Initiate an update of the firmware. err_code = bootloader_dfu_start(); APP_ERROR_CHECK(err_code);

    nrf_gpio_pin_clear(LED1);
}

Regards Balaji

[Prasad]

Hi Balaji

Were you able to update the firmware without button press? What was the modification you have done?

Regards Prasad

[Guest]

Hi Balaji

Thanks for the reply .... But I was facing an issue after device firmware update.. When I do a reset using the button on the board the firmware that I updated came up, but when I done a power on reset(detaching and re-attaching board) boot loader came up ,where it was supposed to be the application which I updated . Did you had any such experiences Any idea to solve this issue