Modify mcuboot to work with NAND flash

[dmaster]

I am currently working with the nRF5340 and using NAND flash for data storage. With the current code size, I need to create a secondary partition in the external NAND flash to support firmware updates via OTA. I understand that Zephyr’s MCUBoot currently supports only NOR flash partitions.

Could you point me to any repositories or resources that could help or provide a guidance on how to add NAND flash support to my setup? Alternatively, is there a way to implement OTA with only a single partition?

[Simonr]

Hi

Neither Zephyr, NCS, or the QSPI peripheral on the nRF5340 supports/is designed for NAND flash devices I'm afraid and only support NOR flashes. It might be possible to implement a driver supporting NAND flash devices yourself, but I think the road there will be cumbersome and a lot of work.

Best regards,

Simon

[dmaster]

Is it possible to configure MCUBOOT to work with a single partition and support OTA updates when the code size is quite large?

[Simonr]

Hi

No, I'm afraid not, you will need dual banking for DFU over-the-air. Single partition DFU will only be possible with serial DFU/recovery.

Best regards,

Simon

[dmaster]

Hi, Thank you!

Is there any open source repo or anything that could help me implement the seconds partition in NAND flash? 

Thank you,
Dhaivat

[Simonr]

Sorry, not that I'm aware of.

Best regards,

Simon