Entering Serial DFU mode from the application layer

RE: Entering Serial DFU mode from the application layer

Sunil vignesh — Fri, 09 Apr 2021 18:04:41 GMT

Hi Einar, I got It working. when i used to enter dfu mode I can able to enter

I made the above lines into the function and where ever i need to perform it enter into DFU mode

Thank you

RE: Entering Serial DFU mode from the application layer

Sunil vignesh — Fri, 09 Apr 2021 13:56:05 GMT

void main()

{

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);

    NVIC_SystemReset();

...

}

RE: Entering Serial DFU mode from the application layer

Einar Thorsrud — Fri, 09 Apr 2021 13:47:36 GMT

You do not need to do all that. To just enter DFU mode, simply:

    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);

    NVIC_SystemReset();

RE: Entering Serial DFU mode from the application layer

Sunil vignesh — Fri, 09 Apr 2021 13:19:40 GMT

i worked in BLE buttonless

there i use code

static bool app_shutdown_handler(nrf_pwr_mgmt_evt_t event)
{
    switch (event)
    {
        case NRF_PWR_MGMT_EVT_PREPARE_DFU:
        NRF_LOG_INFO("Power management wants to reset to DFU mode\r\n");        
        break;
        default:       
        return true;
    }
    NRF_LOG_INFO("Power management allowed to reset to DFU mode\r\n");
    return true;
}

NRF_PWR_MGMT_HANDLER_REGISTER(app_shutdown_handler, 0);


static void ble_dfu_buttonless_evt_handler(ble_dfu_buttonless_evt_type_t event)
{
    switch (event)
    {
      case BLE_DFU_EVT_BOOTLOADER_ENTER_PREPARE:
        NRF_LOG_INFO("Device is preparing to enter bootloader mode\r\n");
        break;
      case BLE_DFU_EVT_BOOTLOADER_ENTER:
        NRF_LOG_INFO("Device will enter bootloader mode\r\n");
        break;
      case BLE_DFU_EVT_BOOTLOADER_ENTER_FAILED:
        NRF_LOG_ERROR("Device failed to enter bootloader mode\r\n");
        break;
      default:
        NRF_LOG_INFO("Unknown event from ble_dfu.\r\n");
        break;
    }
}


static void dfu_init(void)
{
    ret_code_t             err_code;
    ble_dfu_buttonless_init_t dfus_init =
    {
        .evt_handler = ble_dfu_buttonless_evt_handler
    };
        err_code = ble_dfu_buttonless_init(&dfus_init);
        APP_ERROR_CHECK(err_code);
}

dfu_init() i called in service_init()

ble_dfu_buttonless_bootloader_start_finalize()

where i can use this

RE: Entering Serial DFU mode from the application layer

Einar Thorsrud — Fri, 09 Apr 2021 12:53:49 GMT

[quote user="Sunil vignesh"]

these lines

write BOOTLOADER_DFU_START to GPREGRET just as in ble_dfu_buttonless_bootloader_start_finalize() in components\ble\ble_services\ble_dfu\ble_dfu.c before you do a soft reset.

where i need to perform

In Application code?

[/quote]

Yes

RE: Entering Serial DFU mode from the application layer

Sunil vignesh — Fri, 09 Apr 2021 12:46:37 GMT

Hi,

Yes, It is working in nRF5 SDK

these lines

write BOOTLOADER_DFU_START to GPREGRET just as in ble_dfu_buttonless_bootloader_start_finalize() in components\ble\ble_services\ble_dfu\ble_dfu.c before you do a soft reset.

where i need to perform

In Application code?

RE: Entering Serial DFU mode from the application layer

Einar Thorsrud — Fri, 09 Apr 2021 12:01:13 GMT

Hi,

I assume you are referring to the nRF5 SDK now? In that case, you can use GPREGRET to enter DFU mode, in the same way as is used with the BLE buttonless DFU service. Essentially you just ensure that NRF_BL_DFU_ENTER_METHOD_GPREGRET is set to 1 in the bootloader's sdk_config.h and write BOOTLOADER_DFU_START to GPREGRET just as in ble_dfu_buttonless_bootloader_start_finalize() in components\ble\ble_services\ble_dfu\ble_dfu.c before you do a soft reset.