Rockbox Development > New Ports
SanDisk Sansa c200v2, m200v4, clipv1, clipv2, clip+, and fuzev2
andva:
Nice find, jesterday! I can confirm that the message pops up on my e280. I'd expect that pressing Center will put the player in some kind of rescue mode. If the player accepts unsigned firmwares in that state, then life is beautiful :) I wasn't courageous enough just yet to hit the Center button, though; anybody with the possibility of shorting the NAND pins (in case everything gets broken) volunteering out there?
A word of warning: I remember reporting that the "erase firmware? press center button to confirm" message is present _in_ the firmware file, which means that this recovery mode might be dependant on an original firmware being present on the player. So if you ever uploaded a 'broken' firmware (or, God forbid, a homebrew one), you would be deprived of this easy way out. Retarded, you know, but... worse things have been seen.
mike16889:
got the same message on my e260v2 but hold had to be on. not game enouth to oress the center button cuz i still want to use my player...
Hillshum:
I just pushed it to erase, but it seems to work normal.
saratoga:
Spacing on the presumed fuze JTAG connector is much smaller then the M200, so 30 gauge wire probably isn't going to work. I'll have to try and find some smaller wire.
daniel_at:
The "reset firmware"-mode: Have tried the center-button, device switches off, after power on it stuck after showing the sansa-logo, after some power-cycles it booted normal into the OF without any restore-action taken.
@jesterday, How did you find that mode? By accident, or is there something about it on the net already?
@saratoga, Try to find a so-called "enameled wire" (it can usually be found in transformers and inductivities). There exists different, very thin copper wires of that type. I often use them to connect to small pads. Like here, i connected a serial interface to a destroyed iPaq-Connector: http://danyserv.selfip.org/pic/displayimage.php?album=21&pos=1
Use a very small solder-iron tip. You can also make a homebrewn solder tip by wrapping around a ~2mm thick copper-wire around your existing solder tip and file it very pointed and use that for soldering. Sorry, hard to describe, i hope you understand what i mean, cant currently find a picture of it.
[edit]
The Masked ROM-Image: uploaded the completed version of the dump (merged four reads into one, so that missed addresses get completed) to the git:
merged_dump.bin.bz2 at http://gitorious.org/projects/rockbox_sansa_v2/repos/mainline/trees/master/hacking/bits
Daniel
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