STM32L462 FATFS FR_DISK_ERR on f_write

[SYako]

Using custom board with l462re, sdcard connected directly to mcu without external pullups.

SDMMC clockdiv set to 10, SDMMC freq set to 48MHz.

When ever I'm trying to use f_write or f_mkfs they return FR_DISK_ERR.

Sometimes sdcard is corrupts(file is created but files size is 4gb).

Tried 5-6 sdcards from 1gb to 32gb.

Same code but on f767 is working fine.

[Tesla DeLorean]

To understand why the top-level code fails you'll need to look at the DISKIO layer, and validate that.

I wouldn't use f_mkfs() until you have the read/write sector(s) stuff working flawlessly.

Do you have a UART you can output debug/telemetry data on? Which UART/pins ?

[SYako]

I can use stlink for debug(breakpoints)