STM32, SDIO and LittleFS

Discussion about programs, libraries and tools that work with MicroPython. Mostly these are provided by a third party.
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formica
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Joined: Thu Mar 30, 2017 10:47 pm

STM32, SDIO and LittleFS

Post by formica » Sat Feb 20, 2021 10:58 pm

I'm thinking to switch from FAT to LittleFS, after experiencing that FAT significantly slows down after a while on my SDCard.
My application stores a file every 15.8 secs on SDcard, and after a while I guess that FAT32 fragmentation affect the storage velocity.

I would like to know if LittleFS can overcome the fragmentation issue and if is it possibile to use it on SDCard connected through SDIO to an STM32 microcontroller.

Regards

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jimmo
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Re: STM32, SDIO and LittleFS

Post by jimmo » Mon Feb 22, 2021 3:43 am

formica wrote:
Sat Feb 20, 2021 10:58 pm
I would like to know if LittleFS can overcome the fragmentation issue and if is it possibile to use it on SDCard connected through SDIO to an STM32 microcontroller.
I do not have performance measurements to confirm this, but yes I would expect so.

Various STM32 boards supported by MicroPython have support for SDCard (over SDIO).

In all cases, the SDCard provides a block device, which can be mounted with either filesystem driver into the VFS. MicroPython works a lot like Unix in this regard.

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