STM32H7 Write to QSPI using Filex and Levelx. Issue at fx_media_format.

[HMago.1]

Hi,

I am using the STM32H747I-DISCO and wanting to write to the QSPI using Filex.

I tried using the example FX_Dual_Instance, but could not get this working. Since then I have built a project step by step using the CubeMx initialization tool.

Both times my code stops (gets caught in a loop) at fx_media_format. When drilled down with the debugger I found it was waiting for a thread to execute?

Any ideas what I'm missing. I've attached my project below.

Couple of things to note:

• Hardware works and has successfully been manipulated using BSP package just not through filex commands
• stm32cubeIDE version 1.12.0

Thanks,

Hannah

[KDJEM.1 · Accepted solution]

Hello @HMago.1​ ,

For Fx_Dual_Instance example and when you using FileX/LevelX, some usage hints must be respected such as:

- FileX sd driver is using SDMMC1 and the DMA, thus only D1 AXI-SRAM memoru (@ 0x24000000) is accessible by the sd driver.

- When calling the fx_media_format() API, it is highly recommended to understand all the parameters used by the API to correctly generate a valid filesystem.

- When calling the fx_media_format() API, NOR sector size is always 512 bytes.

- FileX is ata buffusing ders, passed as arguments to fx_media_open(), fx_media_read() and fx_media_write() API it is recommended that these buffers are multiple of sector size and "32 bytes" aligned to avoid cache maintenance issues.

I hope this help you to solve the issue 🙂 !

Kaouthar

[Tesla DeLorean]

QSPI NOR Flash generally going to work more efficiently at 4KB as most devices this is the smallest erase size. The page writes are also usually 256-byte maximum at a time, but will decompose well with 4KB alignment.

Done this with FatFS on QSPI.

Trying to manage 512-byte sectors onto 4KB devices is just going to be a headache, as well as issues with speed and wear.