Lpc2000

Hi, 

> > Correct! If you want to log data continously only, why you want to 
> > spent a lot of time in implementing a file system? Just write your 
> > data byte4byte to your flash and wrap around if it is full.
> 
> Definitely concur on this point. Using a file system just to 
> do some append-only logging like using a chainsaw to cut butter.

You can't write byte-by-byte to the LPC flash.  IIRC, an ECC byte cannot
be changed without erasing the flash so you cannot over-program and
already-programmed word.  Hence you must write in groups of four bytes
aligned to a word boundary.  The other thing to say is that the IAP
routines write a minimum of 256 bytes to a 256-byte-aligned page, so to
synthesize word-wise writing you need a buffer of 256 bytes and a copy
of the previous flash contents for the page.

--
Paul Curtis, Rowley Associates Ltd  http://www.rowley.co.uk
CrossWorks for MSP430, ARM, AVR and now MAXQ processors