Littlefs and flash lifespan calculation ?

[LRABO.1]

Hi,

In my office, I use a custom STM32F767GTx card with a QSPI N25Q128A flash memory.

I use littlefs to create, write and read files.

My software works well, I monitor some inputs and store these values in a file.

Every 24 hours, I have a 200 kbytes file, which I can download with a web server.

The QSPI N25Q128A flash memory is limited to 100,000 erasure cycles per sector.

Littlefs offers wear levelling:

"The block allocator has a secondary role: wear leveling.

Wear leveling is the process of distributing wear across all blocks in the storage to prevent the filesystem from experiencing an early death due to wear on a single block in the storage.

littlefs has two methods of protecting against wear:

1. Detection and recovery from bad blocks
2. Evenly distributing wear across dynamic blocks

"

How long will the flash memory last ? How do I calculate it ?

Thank you !

[chaaalyy]

I´m really sorry, i can´t answer your question :( I never got LittleFS to work outside that mbed ecosystem and so atm i´m stuck with FATFS, provided by ST, which even doesn´t know about wear leveling :(

But if you got LFS to work within the cube ecosystem: A code example, how to do it, would be highly appreciated 🙂

Thanks, Charly