Ever heard of this? https://github.com/joembedded/JesFs
On Wed, Jan 19, 2022, 16:44 Alan Carvalho de Assis <acas...@gmail.com> wrote: > Some time ago TizenRT (a NuttX fork) added Journalling support to SmartFS. > > We couldn't get it from them in the past because they changed the > License to Apache, but now that NuttX is Apache license maybe it is > possible to bring it to NuttX: > > https://github.com/sunghan-chang/TizenRT/tree/master/os/fs/smartfs > > They added an Apache header over the BSD license header, it could make > things messy to bring it NuttX mainline, but it could be worth to try. > > BR, > > Alan > > On 1/19/22, Alexander Lunev <alexanderlu...@mail.ru.invalid> wrote: > > FAT itself definitely is not suitable for your task. > > You need a journaling (log-structured) file system. > > Alternatively, FAT can be used as a container file system for the > > target journaling file system you like. E.g. you can format your Flash > > by FAT, then pre-write a dummy solid file to the FAT occupying the full > > space, and use this solid file for placing your journaling file system > > as the content of the solid file (open, lseek, read, write, close). > > > > Best regards, > > Alexander Lunev. > > > > On Wed, 2022-01-19 at 18:40 +0000, TimH wrote: > >> FAT seems broken for NOR flash devices. Spent days getting nowhere. > >> > >> Since FAT and flash devices don't really play well together anyway > >> (already found s512 erases a flash sector at least 4 times when > >> writing > >> a cluster), so I'm wondering, in parallel, if NuttX has other tricks > >> up > >> its sleeve that might achieve the same end? I want t: > >> > >> - write to the flash, for logging, from the app running on the > >> board. > >> This can be done with any FS - or raw - as far as I'm concerned. Not > >> the > >> issue. > >> > >> - an external PC (ideally Linux, Windows and MAC) needs to be able > >> "see" > >> the data via USB (msd) and read/write to the memory (log data, > >> config > >> files, audio files, etc). Hence FAT. > >> > >> With a flash size of between 32 and 128Mbyte, I don't think a > >> ramdisk > >> formatted as FAT holding a copy of the flash data is really the way > >> to > >> go (board only has 64Mbyte RAM anyway). > >> > >> I'm guessing I'll have to keep up the battle - that NuttX is winning > >> - > >> of FAT vs. NOR flash until the bitter end, but if anyone does have > >> other > >> ideas I'm listening! > > > > >
