nRF52832 DFU downgrade fails

RE: nRF52832 DFU downgrade fails

Vidar Berg — Mon, 15 Jul 2024 13:31:29 GMT

Please make sure to bump the version number of the bootloader in your DFU package. Otherwise, the bootloader update will be rejected with the "FW version failure" error.

RE: nRF52832 DFU downgrade fails

DimitraN — Tue, 02 Jul 2024 07:54:51 GMT

No I do not increase any version on the booloader. In fact, I didn't change anything in the config file, other than the downgade prevention. Here is the config file from the secure_bootloader/pca10040_s132_ble_debug example, which I changed this configuration only, and added on my zip file for DFU (along with softdevice and application).

devzone.nordicsemi.com/.../70348.sdk_5F00_config.h

RE: nRF52832 DFU downgrade fails

Sigurd — Mon, 01 Jul 2024 14:09:53 GMT

Hi,

Are you also increasing the bootloader version? Note that turning off downgrade prevention only applies to the application version.

RE: nRF52832 DFU downgrade fails

DimitraN — Mon, 01 Jul 2024 11:57:26 GMT

[quote userid="15146" url="~/f/nordic-q-a/112570/nrf52832-dfu-downgrade-fails/491557"]Could you share this log?[/quote]

The log from my phone - nRF Cnnect app:
devzone.nordicsemi.com/.../Log-2024_2D00_07_2D00_01-14_5F00_47_5F00_01.txt

[quote userid="15146" url="~/f/nordic-q-a/112570/nrf52832-dfu-downgrade-fails/491557"]Also, if you use the _debug-suffixed bootloader project, then logging is enabled in that project, so we can see the logs from the bootloader.[/quote]

I used to do DFU with a zip that contains the secure bootloader hex file, the softdevice and the application.
I changed it now and included the _debug bootloader (after setting 0 downgrade prevention) and run the RTT Viewer to see logs, but only the normal ones appeared , which originate from the application.

/**@brief Function for handling all dfu related events.
 *
 * @param[in] event DFU events
 */

static void ble_dfu_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.");
    break;

    case BLE_DFU_EVT_BOOTLOADER_ENTER:
      NRF_LOG_INFO("Device will enter bootloader mode.");
    break;

    case BLE_DFU_EVT_BOOTLOADER_ENTER_FAILED:
      NRF_LOG_ERROR("Request to enter bootloader mode failed asynchroneously.");
      APP_ERROR_CHECK(false);
      
    break;

    case BLE_DFU_EVT_RESPONSE_SEND_ERROR:
      NRF_LOG_ERROR("Request to send a response to client failed.");
      APP_ERROR_CHECK(false);
      
    break;

    default:
      NRF_LOG_ERROR("Unknown event from ble_dfu_buttonless.");
    break;
  }
}

/**@brief Function for handling power management events. We use it just to enter DFU.
 *
 * @param[in] event power management event
 */

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.");
    break;

    default:
      return true;
  }

  NRF_LOG_INFO("Power management allowed to reset to DFU mode.");
  return true;
}

From this section of my code from the application, these log messages appeared:

and then the logs stopped, so I don't see any logs from the bootloader. Is there another way to do it?

RE: nRF52832 DFU downgrade fails

Sigurd — Mon, 01 Jul 2024 10:35:53 GMT

Hi!

Could you share this log?

Also, if you use the _debug-suffixed bootloader project, then logging is enabled in that project, so we can see the logs from the bootloader.

RE: nRF52832 DFU downgrade fails

DimitraN — Mon, 01 Jul 2024 09:23:14 GMT

I see it at the logs of nRF Connect app on my mobile phone.

RE: nRF52832 DFU downgrade fails

Sigurd — Fri, 28 Jun 2024 15:17:41 GMT

Hi!

[quote user=""]it disconnects and gives FW failure code 5. [/quote]

Where do you see this code 5? Do you have any logs from the bootloader for this?