Garst R. Reese wrote:
Georg Ritter wrote:
Hello,
I'm aware of the wearing problem of FAT and I don't think it's very
suitable format at all nor for data logging - that is what I want to do.
But I also must assume that not everybody is running linux
and is capable of mounting a MMC card or access it bytewise.
The card is a cheap (in terms of uC hardware, and PC hardware
and needed software ->SPI, protocol)) way of transferring data, or?
Transferring via
RS232 - too slow
USB - uC hardware complicated.
IrDa - software protocol stack, etc... often cannot get this running
with out of the box windows and two laptops seems like nightmare.
wireless - huh... EMC, FCC ....
smthing else?
At present, I read and plot the data with MatLab/Octave using the USB
port and a USB MMC reader ($30. or less).
My board has the MicroChip MCP2150 IrDA chip, which implements IRCOMM,
but I have not got it set up yet to talk to the PC. Help welcome.
Just tried the romfs. There's a working windows driver out there
that could mount a romfs formated floppy.
URL?
http://romfs.sourceforge.net/
and M$-drivers:
http://www.acc.umu.se/~bosse/
Then it should be able to mount the MMC card.
it def. can.
Descriptions of the fs structure can be found here:
http://lxr.linux.no/source/Documentation/filesystems/romfs.txt
Good idea Garst!
What's missing is an mkromfs to initialize the file structure.
well not that complicated just a small header and a few bytes
have to be written. see readme. there is also genromfs command. Though the M$
driver is readonly - but ...
there's also a cramfs "compressed" around - didn't investigate.
Garst
Jffs2 info:
http://sources.redhat.com/jffs2/
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