As to HOW you actually do this - is up to you. We could suggest something that may not be economical or available to you. There are plenty of examples on the web that you can decide which way to go.


Here's something that i've used lately:

http://www.sparkfun.com/commerce/...cts_id=752

The code for the filesystem in the above product can be ported to a number of processors.

Also see http://elm-chan.org/fsw/ff/00index_e.html

As for writing Excel data, I normally use a comma delimited file. Excel can read this as can many other programs.



for example:

123,456,678<cr><lf>

You could get fancier and write a XML file.