nRF52840 + External SPI NAND FLASH + FATFS

RE: nRF52840 + External SPI NAND FLASH + FATFS

masterLee — Tue, 20 Dec 2022 09:12:42 GMT

Hi,

I haven't done any progress with it since our project requirements didn't need a file system as it came out due to the low number of write/erase cycles. So I kept a bare metal implementation for now.

RE: nRF52840 + External SPI NAND FLASH + FATFS

sne_333 — Tue, 20 Dec 2022 05:01:19 GMT

Hi masterLee I am also working on the same application. Did you get this working with littleFs??

Your help will be appreciated.

RE: nRF52840 + External SPI NAND FLASH + FATFS

masterLee — Thu, 28 Oct 2021 09:33:22 GMT

Hi, sorry for the delayed answer. I have paused the development with littleFS for some time now due to change of design plans.I will probably resume development at some point but I don't know when yet. Either way I will update this post to let you know

RE: nRF52840 + External SPI NAND FLASH + FATFS

masterLee — Thu, 28 Oct 2021 09:31:45 GMT

Hi, sorry for the delayed answer. I have paused the development with littleFS for some time now due to change of design plans.

RE: nRF52840 + External SPI NAND FLASH + FATFS

AustinEngineer — Wed, 27 Oct 2021 20:19:08 GMT

Hi @masterLee did you get this working?

RE: nRF52840 + External SPI NAND FLASH + FATFS

coyodha — Fri, 03 Sep 2021 03:01:04 GMT

Hi masterLee,

I am interested in this.

Have you tried getting it working with littlefs?

RE: nRF52840 + External SPI NAND FLASH + FATFS

ovrebekk — Mon, 23 Nov 2020 10:26:44 GMT

You welcome, if you get the example running and share it here it would be appreciated 🙂

RE: nRF52840 + External SPI NAND FLASH + FATFS

masterLee — Mon, 23 Nov 2020 10:12:20 GMT

ok I will try it and if it goes well I will post an example for it.

Thank you for your time and support

RE: nRF52840 + External SPI NAND FLASH + FATFS

ovrebekk — Mon, 23 Nov 2020 10:05:28 GMT

That is the same library as the one used in Zephyr, yes.

It should be possible to integrate with the nRF5 SDK, but it is not something we have tried or have any examples for.

Best regards
Torbjørn

RE: nRF52840 + External SPI NAND FLASH + FATFS

masterLee — Fri, 20 Nov 2020 12:18:47 GMT

Hi,

I checked it and, If I get it right, think I can use it as a separate third party library in my project.

Please check the following link https://github.com/littlefs-project/littlefs

Thank you for your help

RE: nRF52840 + External SPI NAND FLASH + FATFS

ovrebekk — Fri, 20 Nov 2020 10:43:47 GMT

As you may or may not know we are slowly moving to a different software architecture called NCS (nRF Connect SDK), based on the Zephyr RTOS.

In Zephyr there is a file system called littlefs that includes wear levelling, and is suited for using external flash devices:
https://docs.zephyrproject.org/latest/samples/subsys/fs/littlefs/README.html

Unfortunately migrating to NCS is probably not the best idea if you're short on time, as there is no easy way to port a project from the nRF5 SDK to NCS.

Best regards
Torbjørn

RE: nRF52840 + External SPI NAND FLASH + FATFS

masterLee — Thu, 19 Nov 2020 09:29:54 GMT

Hi Torbjørn,

The device I use is the MT29F2G01 (256MB) flash and in the near future I will move to MT29F8G01(1GB) flash.

For now I use my own custom drivers for accessing the memory which works rather well BUT my main issue is the bad block management and wear leveling. I have created a basic mechanism for bad block management but I would like to find something much more tested. The thing is that I am on a hurry for my next project and time for low level debugging is a luxury at this point unfortunately.

Micron gives a package with drivers but it seems to me so messed up and with very insufficient commenting that is why I decided to make my own driver in the first place where things are much more straightforward.

RE: nRF52840 + External SPI NAND FLASH + FATFS

ovrebekk — Wed, 18 Nov 2020 15:55:09 GMT

1. No, as you have found there is no bad block management or wear leveling built into the fatFS driver.

2. The flash drivers in the nRF5 SDK have not been tested for use with any NAND flash devices.
Do you have any documentation for the device you are thinking of using?

Best regards
Torbjørn