Lpc2000

--- 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
> >>
> >>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