FileSystem for NAND FLASH recommendation

RE: FileSystem for NAND FLASH recommendation

dejans — Wed, 05 Jan 2022 13:40:14 GMT

Hi,

It is good to hear that your chosen file system is working on external flash.

Best regards,

Dejan

RE: FileSystem for NAND FLASH recommendation

Dor Sadeh — Wed, 05 Jan 2022 13:21:18 GMT

I have successfully managed to mount littlefs on the external flash

I needed to configure CONFIG_PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY=n

the default for CONFIG_PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY is y, which initiates a qspi nor flash configuration, which I don't have in my system, and therefore caused some trouble

RE: FileSystem for NAND FLASH recommendation

dejans — Wed, 05 Jan 2022 13:05:48 GMT

Hi,

Are there any problems left? Could you share the current status?

Best regards,

Dejan

RE: FileSystem for NAND FLASH recommendation

Dor Sadeh — Wed, 05 Jan 2022 11:52:09 GMT

this problem was caused by CONFIG_PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY config which is by default y when using external flash and mcuboot, which I'm using but not on external flash

RE: FileSystem for NAND FLASH recommendation

dejans — Wed, 05 Jan 2022 11:50:40 GMT

Hi,

I have noticed that you are using NAND flash device for which we have no support. If you intend to use QSPI, note that QSPI peripheral does not support NAND devices (for both XIP and EasyDMA modes). However, you could use custom instructions for that.

You could also look at
devzone.nordicsemi.com/.../305866
devzone.nordicsemi.com/.../297544

Best regards,

Dejan

RE: FileSystem for NAND FLASH recommendation

Dor Sadeh — Wed, 05 Jan 2022 11:07:38 GMT

Thanks, I've decided to give little_fs a try.

But I'm having some trouble.

I was following the documentation here for configuring the partition:
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/scripts/partition_manager/partition_manager.html#external-flash-memory-partitions

For some reason I get an error regarding qspi nor, while there is no qspi nor used in the project. checking .config I see that qspi nor flash has been configured (CONFIG_NORDIC_QSPI_NOR=y)

error message: ncs/zephyr/include/devicetree.h:305:40: error: 'DT_N_INST_0_nordic_qspi_nor_P_sck_frequency' undeclared here (not in a function) 305 | #define DT_INST(inst, compat) UTIL_CAT(DT_N_INST, DT_DASH(inst, compat))

Can't understand what caused for this undesired configuration

I'm using the nrf52840 with ncs 1.7.1

RE: FileSystem for NAND FLASH recommendation

dejans — Thu, 30 Dec 2021 13:18:02 GMT

Hi,

Please find related information in the discussions on these links:

devzone.nordicsemi.com/.../nrf52840-external-spi-nand-flash-fatfs
devzone.nordicsemi.com/.../external-nand-flash-with-nrf5340-non-spi
devzone.nordicsemi.com/.../suitable-filesystem-for-external-slc-nand-flash-memory

Best regards,

Dejan