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Re: [lpc2000] Re: Cheap SD Flash File System

2005-11-15 by latheef

Hi,

Can you tell me how to work this code on windows on PC ,so that i can be familiar with the code and then work on target.
  ----- Original Message ----- 
  From: Bryce Schober 
  To: lpc2000@yahoogroups.com 
  Sent: 2005 Nov 14 10:06 PM
  Subject: Re: [lpc2000] Re: Cheap SD Flash File System


  On 11/12/05, rtstofer <rstofer@...> wrote:
  >
  >  --- In lpc2000@yahoogroups.com, Tom Walsh <tom@o...> wrote:
  > >
  > > rtstofer wrote:
  > >
  > > >--- In lpc2000@yahoogroups.com, "Martin Maurer"
  > <mailingliste@c...>
  > > >wrote:
  > > >
  > > >
  > > >>Try
  > > >>
  > > >>http://alumnus.caltech.edu/~pje/rdcf2.txt<http://alumnus.caltech.edu/%7Epje/rdcf2.txt>
  > > >>
  > > >>It works !
  > > >>
  > > >>Regards,
  > > >>
  > > >> Martin
  > > >>
  > > >>
  > > >
  > > >It looks like rdcf2 is quite complete and includes a test suite.
  > It
  > > >supports FAT12 and FAT16 and the documentation is very good.
  > > >
  > > >It can also be built under DOS with TurboC so I can play with it
  > on
  > > >my DOS box before I port it to the LPC2106.
  > > >
  > > >Moving back to FAT16 versus getting nowhere with FAT32 seems like
  > a
  > > >good tradeoff.
  > > >
  > > >
  > > >
  > > The alloc() and free() function calls have to be written out.
  > Otherwise
  > > we are in danger of fragmenting the RAM on the LPC2000 processors.
  > >
  > > TomW
  >
  > Yes but many implemtations allocate storage for a predefined maximum
  > number of open files. Not a big deal, these are microcontrollers,
  > not workstations.
  >
  > I need to correct myself re: RDCF2. I compiled it and it executes
  > well when installed on a floppy and interacting with a floppy.
  >
  > It does not work from my hard drive whether interacting with the HD
  > where it fails completely or the floppy where it gets just about
  > everything wrong.
  >
  > I traced the hard drive failure to the first call to absread where
  > the code is trying to read absolute sector 0. I have to think about
  > this but I think it is incorrect. In any event, the call fails.
  >
  > Another limitation to RDCF2 is a 32 MB limit so the code is for a
  > very early version of FAT. From the very first paragraph of the doc
  > file: "RDCF is a reentrant and ROMable DOS-compatible file system
  > designed for use with floppy diskettes and hard disk partitions that
  > do not exceed 32 Mbytes in size."
  >
  > Anyway, scrap that version; it doesn't really work.
  >
  > Too bad the $139 FLASH File doesn't include CF support - it is a $49
  > optional upgrade! Bummer...
  >
  > Richard


  Look at http://www.prllc.com/productcart/pc/viewCat_P.asp?idCategory=10 and
  you'll see that they've simply separated their physical media support. You
  can get FAT+CF for $139 or FAT+MMC/SD for $139 or FAT+CF/MMC/SD for $188.

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  >  ------------------------------
  >



  --
  Bryce Schober


  [Non-text portions of this message have been removed]



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