IMPORTANT: Before doing anything... Remember this is a GPL project = I take no responsibility of what will happen, if you use this software.

Ok, undestood? Good. And now let's get to the point...

How to read firmware using libzenstone

Windows (x86):

Download libzenstone-x86-win32, extract
Install libusb-win32-bin
Copy libusb0.sys to <win_dir>/system32/drivers
Copy libusb0.dll to <win_dir>/system32
Run <libusb_dir>/bin/install-filter-win.exe
Choose your mp3 player (Mass storage device)
Open console, run libzen.exe -i to check if you device is detected
Run libzen.exe -r to read firmware
Only if you see "Reading firmware succeded" all files have been downloaded

Windows (x64):

Download sources
Change MSVC project, good luck :) (I don't know if there is x64 even version of libusb)

Linux

Download sources
You need package containing libusb headers and lib (under Ubuntu it is libusb-dev)
make console
./zen_console -i to check if you device is detected
./zen_console -r to read firmware

Possible errors

First of all, if any error occurs - don't worry. Program only reads the content of device, it doesn't write anything. So you can just unplug the mp3 player and if attached again it would work as before.

Windows: There are often some transfer errors. The more times you try, the faster they appear. Unplug and plug the device again.
Linux - "Zen Stone not found or error occured": There cannot be 2 drivers using same device. Although there is auto-remove kernel driver option, it doesn't always work. If so first try to umount USB drive if you have auto-mount, if this doesn't help rmmod usb_storage
Linux - "Device detected, but is not ready, try running the program again": Do what the command says (the more the better :D). If if doesn't help do same as in the previous point.

Other devices

Well, there is a possibility to read firmware not only from Zen Stone. Just use the -pid and -vid options to specify yours device Vendor and Product id (can be checked using lsusb on Linux or install-filter-win from libusb on Windows).
Devices with high probability of working (same chip - STMP3550):

iPod Shuffle
Samsung YP-U1 +YP-F1
Samsung YP-U2 +YP-F2
Creative Zen Stone Plus

Generally, you can try reading firmware from all devices Sigmatel STMP3xxx chips, it shouldn't do any harm to your mp3 player because the read command is the same for all chips.

I have tried to read firmware of PENTAGRAM Vanquish VOLT:


			libzen.exe -i -vid 0x066f -pid 0x8000

			libzen.exe -p -vid 0x066f -pid 0x8000

Only -i mode was succesfull:


			VID=0x066F, PID=0x8000

			Chip id: 0x3700

			Protocol version: 0x0600

-r mode ended with timeout, protocol for STMP3700 chip based mp3 is different. The device wasn't harmed :)

Some technical crap

A list of all memory banks on Zen Stone:


			Bank 1 [DATA] 1061421056B -> FAT content

			Bank 4 [SYSTEM] 262144B -> bootmanager.sb

			Bank 5 [SYSTEM] 524288B -> usbmsc.sb (mass storage driver)

			Bank 6 [SYSTEM] 262144B -> stmpsys.sb (system on chip)

			Bank 7 [SYSTEM] 1310720B -> resources.bin

			Bank 8 [SYSTEM] 1310720B -> don't know, copy of resources

			Bank 9 [SYSTEM] 7864320B -> don't know, 0xFF 0xFF 0xFF and so on...

The difference between this files and files that you can download with updater from internet are:

Different beggining, .sb files has some ASCII info about product and component version
Different size, .bin files have size divided by 2048 (sector size), unnecessary bytes are filled with 0xFF