Help with FileX/LevelX Implementation on STM32U585AII6Q with NOR Flash (IS25LP064D)

[ShilpaM]

Hello Microsoft Community,

I’m currently working on implementing a file system using FileX and LevelX on external NOR Flash (IS25LP064D) connected to the STM32U585AII6Q board.

Flash Memory Specifications:

• Sector Size: 4 KB
• Block Size: 32 KB / 64 KB
• Total Flash Size: 64 Mbit / 8 MB
• Page Size: 256 bytes

Requirement:

I need to create a .txt log file using FileX and once the file reaches 100 KB, it should be deleted and a new file created in its place.

Media Initialization Parameters Used:

• Total clusters: 300
• Bytes per sector: 512
• Sectors per cluster: 8
• Hidden sectors: 0
• Heads and sectors per track: 1
• Number of FATs: 1

Issue:

When writing logs using FileX, I receive a FX_IO_ERROR after a few logs are written—even though there is still available space on the flash.

My Questions:

1.   What are the correct parameters to pass to fx_media_format() for this NOR flash setup (e.g., sector size, cluster size, number of FATs)?
2. Is there a formula or guideline for determining these parameters when using NOR flash with FileX/LevelX?
3. I was able to initialize the media with a size of 150 KB—what is the minimum required size for successful media initialization

Thanks

Shilpa

[Tesla DeLorean]

You should use 4KB sectors. 1 per cluster.

Instrument the IO layer to understand why it fails.

[Saket_Om]

Hello @ShilpaM 

Please refer to the example below: 

STM32CubeU5/Projects/STM32U5G9J-DK2/Applications/FileX/Fx_NoR_Write_Read_File at main · STMicroelectronics/STM32CubeU5 · GitHub