Facing an issue when we are trying to mount a file system on external flash(M95P42) + nrf52840.

RE: Facing an issue when we are trying to mount a file system on external flash(M95P42) + nrf52840.

Menon — Thu, 19 Jun 2025 14:27:08 GMT

Hello,

I think you can refer to the file system manipulation sample, which shows manual filesystem mounting using fs_mount(), and demonstrates read/write operations with FATFS.

Kind regards,
Abhijith

RE: Facing an issue when we are trying to mount a file system on external flash(M95P42) + nrf52840.

ramakrishnabodepudi — Wed, 18 Jun 2025 14:39:25 GMT

Thank you Abhijith for the quick response.

I do have a driver to access the EEPROM device and I am able to read/write raw data into it. Could you please guide us how we can leverage this driver to create Partitions (like FATFS) and link it to Zephyr dts?.

Also, thanks for pointing out the incorrect device name.

RE: Facing an issue when we are trying to mount a file system on external flash(M95P42) + nrf52840.

Menon — Wed, 18 Jun 2025 14:28:47 GMT

Hello,

I'm not sure if the nRF QSPI NOR driver will work with the module you're using. When I checked the datasheet of your module, it appears to be an SPI page-mode EEPROM. I believe you'll need to develop a custom driver for this module (if one is not already available in Zephyr).

I also noticed that your device tree is currently pointing to &mx25r64, which is incorrect. The MX25R64 has a different JEDEC ID.

Kind regards,
Abhijith