Hello,
I keep getting very strage intermittent (well when it happens its permanent) errors with nrf54L15DK.
I have not yet observed it with my custom PCB (based on Raytak nrf54L15), but with the dev kits I get this error now and again.
The FW is reasonably complex with ble mesh, FW OTA, etc.
in sysbuild.conf I have
Very often this then works great. I flash my nrf54L15DK and it works 100%. I can do this maybe 50 times. But suddely - and seemngly for no reason I get "E: Failed to open flash area ID 12 (image 0 slot 1): -19, cannot continue".
I can then try "nrfjprog --eraseall --snr 1057780909" or similar. But nothing helps - the card seems toast.
The I add "SB_CONFIG_SECURE_BOOT_APPCORE=y" to my sysbuild, rebuild (to generate the key), eraseall again and run "west ncs-provision upload -k ./build/GENERATED_NON_SECURE_SIGN_KEY_PRIVATE.pem -s nrf54l15 --keyname BL_PUBKEY --dev-id 1057780909"
I then get:
nrfutil device x-provision-keys --key-file /private/var/folders/79/fl4ypxs94fl1766hmwg1q_c80000gn/T/nrfutil_fan2szlt/keyfile.json --serial-number 1057780909
Uploaded!
then I get
This has happened to maybe 10 nrf54L15DK. They work to start with, but then die and I cannot recover them.
It happens on my PC desktop, my laptop and mac mini.
All I can imagine is flash wear or corruption - it almost seems like a HW problem with the external flash with nrf54L15DK...
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Hi Bjørn,
It would be interresting to see a generic External Flash sample, such as the JESD216 sample on one of the DKs that stopped working.
This would help us confirm if the external flash works at all or not.
Regards,
Sigurd Hellesvik -
Hello.
I tried jesd216 sample (nrf) on SDK 3.0.2 with nrf54L15DK*** Booting nRF Connect SDK v3.0.2-89ba1294ac9b ***
*** Using Zephyr OS v4.0.99-f791c49f492c ***
mx25r6435f@0: device not readyI think the flash is toast. Its just strange that it can die due to FW update alone. I get that wear could be an issue - but not for 5-10 writes!
I really enjoy coding for nrf54L15 - and the custom board is behaving (we use the same flash there). But I think you may be a design issue with your DK...
Bjorn
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If it helps, I have not seen anyone else having a broken flash on the nRF54L15DK, so maybe you were just unlucky.
That said, we can replace the broken DK for you.
Either by post.
Or if you want, I also work in Oslo, you could come by our office to exchange DKs.
Alternatively, we could meet somewhere on our way home from work one day and exchange DKs, such as Oslo S.What do you say?