Is there a fatFS example that can be used with internal flash memory ?

[ranran]

Hello,

In STM32H7 cube examples I see the following related fatFS examples:

en.stm32cubeh7\STM32Cube_FW_H7_V1.3.0\Projects\STM32H743I_EVAL\Applications\FatFs

FatFs_MultiDrives

FatFs_RAMDisk

FatFs_SDRAMDisk

FatFs_USBDisk_RTOS

FatFs_USBDisk_Standalone

FatFs_uSD_DMA_RTOS

FatFs_uSD_DMA_Standalone

FatFs_uSD_Standalone

Which of the above can be used with the internal flash memory ?

Thank you,

ranran

[Tesla DeLorean]

None of them.

T​he large block size of the internal flash and speed make it ill suited to the task.

[ranran]

Thanks Clive,

Are you familiar with alternatives if needed non-volatile filesystem. We don't have sd or usb. We can only have external flash.

Thanks,

[Tesla DeLorean · Accepted solution]

QSPI or eMMC would work with FATFS. External NAND is possible, but gets more involved related to block management, wear leveling and ECC. Long term availability and support of foot-prints is complicated.

Depends also on the number and size of "files" you actually need to manage, and how often they change. One could consider journalling structures over a internal flash sector, or two.

[ranran]

Hello Clive,

Sorry for the delayed reply.

Is one of the these examples can be used with nor spi :

FatFs_MultiDrives

FatFs_RAMDisk

FatFs_SDRAMDisk

FatFs_USBDisk_RTOS

FatFs_USBDisk_Standalone

FatFs_uSD_DMA_RTOS

FatFs_uSD_DMA_Standalone

FatFs_uSD_Standalone

Thank you,

Ran

[Tesla DeLorean]

Nothing is going to be a simple drop in. I'd perhaps suggest reviewing the RAM or SD card examples to provide context and perspective on how a block storage device is expected to interact. ​