[SOLVED] After the instruction MX_TouchGFX_Init(), FATFS methods do not work as wanted (STM32F469I-DISCO)

[William F]

When I'm using TOUCHGFX and FATFS together, I can create/write/read a file in my SD only if I do it before "MX_TouchGFX_Init();"

f_mount(&SDFatFS, (TCHAR const*)SDPath, 0);

f_open(&SDFile, "DIO.TXT", FA_CREATE_ALWAYS | FA_WRITE); //with TGFX this one gets FR_DISK_ERR

f_write(&SDFile, wtext, sizeof(wtext), (void *)&byteswritten);

f_close(&SDFile);

f_mount(NULL, (TCHAR const*)SDPath, 0);

Not sure if this can be helpfull but the only difference I notice it's that when I debugging:

• If there is MX_TouchGFX_Init();, after f_mount(), FatFs gets the value : 0x2000a6a4 <SDFatFs>
• In other case, FatFs is equal to the value : 0x2000a2fc <SDFatFs>

 Do you know if there is something I can do to make them working well after with the graphic application?

Thank you

EDIT: I resolve it. I suppose because MX_TouchGFX_Init() is written in C++ inside that the FATFS methods could not be read in C so I put it inside a task and it works!!!

 

[Amel NASRI]

See Edit section for the solution, thanks @William F​ for sharing it.

-Amel