Below is a link to files for the Atmel SAM4S processor that implements a simple FAT file system. The Atmel part is an ARM M4 core which I used in a recent design. the link takes you to the C files. YOu can also easily navigate to the various documentation for the code.
http://asf.atmel.com/docs/latest/common.services.fs.fatfs.access_example.sam4s_xplained/html/files.html ------------ Scott Doctor scott at scottdoctor.com ------------------ On 7/13/2015 12:29 PM, Jim Callahan wrote: > At a minimum SQLite needs a C complier (or cross-compiler) for the CPU. > > The storage device manufacturer usually publishes some specs (and sample > code -- such as assembly language routines callable from C) if a third > party has a primitive file system (a term I prefer to VFS which could refer > to virtualizing a network file system) the device manufacturer should know > about it. > > The problem consists of closing the gap, by building or buying a software > layer (primitive file system?) between the routines or sample code provided > by the storage device manufacturer and the calls made by SQLite. > > Virtual usually refers to a layer up the stack (more abstraction) he is > trying to go a layer down the stack (closer to the hardware) which is more > primitive without all the fancy stuff of the Unix civilization. > > Here is an article (SIGMOD 2013) on trying to get MS SQL Server to run on > an SSD with an ARM chip. > http://pages.cs.wisc.edu/~jignesh/publ/SmartSSD.pdf > > > Here is a discussion of solid state drive (SSD) firmware. > http://www.openssd-project.org/wiki/The_OpenSSD_Project > > As the controller chip on the SDD drive becomes a more powerful ARM chip, > it may be feasible to have SQLite in the SDD itself. > > Here is a discussion from 2008 > http://sqlite.1065341.n5.nabble.com/Porting-into-a-microcontroller-minimum-requirements-td37469.html > > Many handheld consumer devices follow the mobile phone tablet model and > have a Unix or Linux derived operating system iOS (based BSD Unix), Android > (based on Linux) or Windows (based on Windows) or Ubuntu (a Linux > distribution) and most of these already have SQLite. > > Jim > > > > On Mon, Jul 13, 2015 at 11:52 AM, Richard Hipp <drh at sqlite.org> wrote: > >> On 7/13/15, Jim Callahan <jim.callahan.orlando at gmail.com> wrote: >>> SQLite expects a file system. >>> >> Not necessarily. Out-of-the-box SQLite does need a filesystem, but >> embedded system designers can substitute an alternative VFS >> implementation that writes directly to hardware. This has been done >> before. There are consumer gadgets that you can buy off-the-shelf >> today (in blister packs) that contain an instance of SQLite that talks >> directly to flash memory - essentially using SQLite as the filesystem. >> >> I think Shuhrat is just trying to do this again. >> >> -- >> D. Richard Hipp >> drh at sqlite.org >> _______________________________________________ >> sqlite-users mailing list >> sqlite-users at mailinglists.sqlite.org >> http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users >> > _______________________________________________ > sqlite-users mailing list > sqlite-users at mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users > >
