nRF52810 buttonless DFU not working

RE: nRF52810 buttonless DFU not working

helsing — Mon, 06 Sep 2021 13:36:38 GMT

Hi Marta,

It looks like my colleague replied to almost the same question in your other case. Please let us know if you have any more questions regarding the topic of this ticket.

Best regards,

Håkon

RE: nRF52810 buttonless DFU not working

Marta L — Thu, 02 Sep 2021 07:07:56 GMT

Hello,

I've got another issue related to this ticket. It's because i'm able to update the firmware by an nRF52 dev kit + PC (nRF Connect for Desktop), but when I try to do the same process with a mobile phone (app nRF Connect) I get an error.

I'm doing the following steps:

Connect to the board I want to update -> DFU -> Select file type: Distribution packet (ZIP) -> Drive -> select zip file.

It starts DFU but I get "Error (0x8): GATT CONN TIMEOUT"

Do you know why this is happening?

Marta

RE: nRF52810 buttonless DFU not working

Marta L — Fri, 27 Aug 2021 07:53:01 GMT

Hi Hung,

Sorry for the delay in replying.

Finally, I solve the debug issue writting in flash the program after start debugging.

Also, I did all the changes related to the DFU buttonless and adapted the blinky example to my application and it works. I don't know why it didn't worked with the UART example but it's not a problem now.

Many thanks for your help!

Marta

RE: nRF52810 buttonless DFU not working

Hung Bui — Thu, 19 Aug 2021 12:12:15 GMT

Hi Marta,

When you debug the blinky application, please make sure that you don't have the SES project of the bootloader also in debug mode.
You can try trigger a reset from the Debug menu in the blinky application. If it doesn't jump to the application, please pause and check where the PC is.
Note that you should have the exact same application that you DFU update via the bootloader. If you have any modification (for example switch from "release" to "debug" compiling mode or if you change anything) the CRC check will not match and the bootloader will not jump to the application.

RE: nRF52810 buttonless DFU not working

Marta L — Thu, 19 Aug 2021 07:53:44 GMT

Hi Hung,

I've written to flash SD+BL+Blinky BLE + BL Setting. As a result, the bootloader works well and the program enter to the Blinky app. I can see "Nordic_Blinky" device advertising.

I able to debug from the Secure bootloader code, but when I try to do it from the Blinky application, it never jumps into the app. I'm working with SEGGER Embedded Studio 5.5.

Regards,

Marta

RE: nRF52810 buttonless DFU not working

Hung Bui — Wed, 18 Aug 2021 13:54:30 GMT

Hi Marta,

Please don't skip the step, just test doing SD+BL+Blinky app + BL Setting.

We need to verify that the application can be updated and can run normally.

You can test first with the simple blinky that only does LED Blink, no BLE. After it 's verified, you can test with the BLE blinky.

I suspect that the app (that you added DFU Buttonless) may crash for some reason. You can try debug it, if the bootloader works as it should you should be able to stop the PC at main() in the application when debugging.

RE: nRF52810 buttonless DFU not working

Marta L — Wed, 18 Aug 2021 12:58:51 GMT

Thanks for your quick reply, Hung.

I've done the suggested test: DFU bootloader works well, i can update the blinky application. After that, I've modified the RAM parameters, added dfu .c files to project, added preprocessor definitions, added include directories and all the DFU buttonless support to the blinky application. Then, i've generated the BL settings with the following command:

nrfutil settings generate --family NRF52810 --application ble_app_blinky_pca10040e_s112.hex --application-version-string "2.0.0" --bootloader-version 2 --bl-settings-version 2 bl_setting.hex

Then, i've written to flash SD + BL + APP + BL setting.

Now, i can't see any device advertising. However, i've checked that the application is valid looking at app_is_valid(). I've noticed that the reason of my previous mistake (the program didn't jump to the application) was that I was using an incorrect bootloader settings file.

Now, this is solved, but... why I can't see my application? Do you think it could be related to the memory limits of the chip?

Marta

RE: nRF52810 buttonless DFU not working

Hung Bui — Wed, 18 Aug 2021 09:34:17 GMT

Hi Marta,

To narrow down the issue, I would suggest to do the following test:

1. Please test doing DFU update with the bootloader. This is to verify that your bootloader is working well. I have made a blog that you can follow here. You can just update a simple application for example blinky application.

2. Try generating the bootloader setting for the blinky application. Then write to flash the SD + BL + APP + BL setting. Please don't use mergehex at this point.

If it doesn't work please show the script you used to generate the BL setting.
You can think of building the bootloader in debug setting so that you can step into the code and check why it doesn't jump to the application. The function that check if the bootloader should enter the application is in app_is_valid() in nrf_bootloader.c

You may also want to check if the NRF_BL_DFU_ENTER_METHOD_BUTTON_PIN is always 0 or not. If it's 0, then the DFU bootloader will enter DFU mode anyway (check dfu_enter_check() )