Secure Bootloader Downloads app but stays in Bootloader on Custom board

RE: Secure Bootloader Downloads app but stays in Bootloader on Custom board

Challen — Thu, 11 Jan 2018 08:11:05 GMT

Hi,Kevin，i meet the problem in SDK13.1，too.I set the FDS_VIRTUAL_PAGES to 240.I can't understand what you mean.Could you tell me more about it and paste the code out?

RE: Secure Bootloader Downloads app but stays in Bootloader on Custom board

Kevin s — Tue, 25 Apr 2017 20:01:36 GMT

The error was in the pages_init function, FDS_PAGE_UNDEFINED was the type and it was not erased, so therefore FDS could not use it and returned FDS_ERR_NO_PAGES. I have some hardcoded memory locations in my app, and I did not account for the FDS pages set in the sdk_config.h file. I reduced FDS pages to the minimum (2) and moved my hardcoded memory to not interfere.

RE: Secure Bootloader Downloads app but stays in Bootloader on Custom board

bjorn-spockeli — Tue, 25 Apr 2017 07:09:29 GMT

Could you post the error code from fds_init?

RE: Secure Bootloader Downloads app but stays in Bootloader on Custom board

Kevin s — Tue, 25 Apr 2017 04:20:17 GMT

Actually, we have an I2C RGB hardware driver, so I added some TWI code. I also have a watchdog and am feeding it in the bootloader according to some of your recommendations. I was getting the every other DFU fail problem mentioned elsewhere, but Hung solved that problem in another post; "Buttonless Secure DFU with WDT needs DFU twice". So now, I'm getting intermittent failures when I power down the UUT and power back up. I have traced it down to the fds_init function failing in the peer_data_storage.c file.

RE: Secure Bootloader Downloads app but stays in Bootloader on Custom board

bjorn-spockeli — Fri, 21 Apr 2017 09:35:37 GMT

Ok, so you added some PWM code to your bootloader and that resulted in the bootloader functioning properly?

RE: Secure Bootloader Downloads app but stays in Bootloader on Custom board

Kevin s — Thu, 20 Apr 2017 18:21:37 GMT

OK, I put some RGB LED drives in my bootloader and some delays so I could see the LED Color produced for debugging and user purposes and now the DFU is working consistently. Because I'm using a custom board, I took out all the development board led on/off commands. Maybe there was some race condition when I did this....

RE: Secure Bootloader Downloads app but stays in Bootloader on Custom board

Kevin s — Thu, 20 Apr 2017 17:23:27 GMT

More information; I have made another app package; this one with app version 2. It does not matter which package I DFU; it will only go to the app on even number of transfers, no matter which DFU package I download.

RE: Secure Bootloader Downloads app but stays in Bootloader on Custom board

Kevin s — Thu, 20 Apr 2017 15:07:50 GMT

Sure, I was in the middle of changing my application version numbers, so now it is 1 and 4.

Also, if I DFU the exact same package twice it works, 3 times no, 4 times yes. Interesting. For the initial programming

nrfutil settings generate --family NRF52 --application app.hex --application-version 1 --bootloader-version 2 --bl-settings-version 1 app_valid.hex

For the update DFU package

nrfutil pkg generate --hw-version 52 --sd-req 0x8C --application-version 4 --application app.hex --key-file ....\OTA_files\private.pem Stick_dfu_r1.3.1.zip

Also for reference, SDK 12.1, SD 3.0.0, IAR 7.70 (workbench 7.5), not sure about MDK

RE: Secure Bootloader Downloads app but stays in Bootloader on Custom board

bjorn-spockeli — Thu, 20 Apr 2017 06:43:27 GMT

Hi Kevin, could you post the nrfutil commands you're using to generate the settings hex and the firmware image?