How to configure FileX using CubeMX?

[TDJ]

How to start with FileX using CubeMX?
In CubeMX I enabled ThreadX and FileX with the default configuration, increased ThreadX "memory pool size" to 2k and  enabled "Generate Init Code" for both.

In app_azure_rtos.c, tx_application_define() function MX_FileX_Init() fails - tx_byte_allocate() returns error code 16. According to docs that means TX_NO_MEMORY "Service was unable to allocate a block of memory within the specified time to wait.".
I get this error even when I substantially increase ThreadX "memory pool size" to 64k.
Without FileX enabled ThreadX works - I created a timer which nicely blinks the onboard LED.
I know FileX does not really require ThreadX, but I need it for other purposes.

This is probably something simple, but I admit I am new to ThreadX.
Tested with the latest CubeMX, STM32U5A9 MCU as well as NUCLEO-U575ZI-Q boards.

Please advise.

[Victorheca01]

@FBL 

Hi FBL,

     I am using STM Cube 1.14.0 to develop my project. I found that the FileX and ThreadX can not work together. my hardware is U575 eval board.

• Just use FileX, SDCARD is working and can create file;
• Enable ThreadX, SDCARD failed in initialisation;
• Disable ThreadX, FileX works as usual.

Could you confirm this problem and tell me if there is any solutions.

I checked ST’s community, it seems that many people complain about this problem and there is no solution so far.

I can send you my project source code if you would like to verify. Thanks in advance.

[FSouza]

Any good news?
Facing the same problem here.

We are using an STM32H563 with an SD card under FileX/ThreadX.

Initially, operating files in SRAM via fx_media_open only worked after increasing the default value of FX_APP_THREAD_STACK_SIZE from 512B to 4 × 512B.

Subsequently, we switched to operations with a 16 GB SD card, maintaining the same parameters. However, the fx_media_open command fails to open the media, returning FX_BOOT_ERROR (0x01).

Observations:

1. The presence of the SD card is correctly detected.

2. The SDMMC clock was reduced to 25 MHz.

3. On the STM32H735G-DK board, as per the official example (link), all FileX operations worked, but only with cards smaller than 64 GB (no support when formatted in exFAT).

4. STM32CubeMX, Version: 6.15.0-RC7, Build: 20250701-1659 (UTC).

5. STM32CubeIDE, Version: 1.19.0, Build: 25607_20250703_0907 (UTC).

Attached are some screenshots of CubeIDE/MX for reference.