GigaDevice GD55 NOR flash, up to 4Gbit. I use a 1Gbit variant and am just writing the driver for it.
Would expect LittleFS will work on it, and I can try it once driver is working, next week hopefully. > On 18 Oct 2024, at 15:19, Matteo Golin <matteo.go...@gmail.com> wrote: > > Hello everyone, > > Matteo from InSpace again with more questions. > > We are currently in the process of selecting some non-volatile memory for our > telemetry system so that we can log our > flight data while our rocket is in the air. We're having some trouble > settling on an option because of a few uncommonly > encountered events that happen in our rocket. > > Typically our rockets hit around Mach 1.8 and they can experience a ton of > vibrations while in the air. To circumvent > any write interruptions, we wanted to use flash memory that can be soldered > directly to the board. Unfortunately the NOR > flash packages we've found are pretty small in terms of capacity, and it > appears from our research that NuttX's support > for NAND flash has not been tested on real hardware yet, only simulated NAND > memory. > > The goal was to have some kind of very reliably connected (soldered) non > volatile memory for in-flight logging, and then > copy all the logs to the SD card upon landing for easy removal and placement > into a laptop, etc. > > We've now found a microSD card slot which locks in the card so that it > doesn't easily lose connection during vibration > (though still not perfect). I am wondering if it may be possible to just log > directly to the SD card to avoid having to > consider another type of memory. The SD card is also quite cheap memory. > > For this setup, I would want to have two equal partitions on the SD card > (which would be around 32GB in total > capacity). One partition a FAT file system, and one a power-safe file system. > The power safe partition would be used for > logging in flight to avoid corruption on power loss/discontinuity, and the > FAT file system would be copied to upon > landing so that data is easily accessible from a laptop. > > I'm not sure if this is possible within NuttX as I'm not familiar with how > the OS handles SD card/memory partitions. In > addition, I was hoping to use littlefs for the power-safe file system but I > am not sure that it works with SD devices. > I've found evidence online of some people using it with SD cards, but not > sure about how that may interact with using it > through NuttX. > > If anyone has used littlefs on an SD card, or knows of a different power-safe > file system we could use (I couldn't find > any in the file system listings) that would be great. Or if there are any > suggestions for memory options (we're still > investigating) supported by NuttX that could contain at least around 200MB of > data. > > Thank you, > Matteo > <signature.asc>
