Creative Zen Vision:M

[bobbaluba]

I'm having some trouble using the zenutils by zook.
They worked great on my old computer, but on the other computers it doesn't work.

I get the extremely inhelpful error message:

C:\zen\bin>zen_crypt
Systemet kan ikke kjore angitt program.

Which means: System cannot run the specified program.

Any ideas?

[mcuelenaere]

I'm having some trouble using the zenutils by zook.
They worked great on my old computer, but on the other computers it doesn't work.

I get the extremely inhelpful error message:

C:\zen\bin>zen_crypt
Systemet kan ikke kjore angitt program.

Which means: System cannot run the specified program.

Any ideas?

Which OS are you using? What is in your %PATH%? Did you already tried compiling the source yourself?

[shotofadds]

According to the Vision:M wiki page, the LCD panel is marked with the letters "V250QV", if that's the case its almost certainly in the same family as the LCD used in the Cowon D2:
 
http://www.neodns.co.kr/specpdf/tft/xLTV250QV-F0B.pdf

The datasheet gives details of the necessary power-up and power-down sequences, which you might be able to locate in the original firmware (locating those was the starting point for the D2 port).

The LTV250QV contains an S6F2002 LCD controller chip, but no information on this has been found yet. On the D2 this wasn't a problem, as the TCC7801 SoC provides its own interface to the LCD controller.

EDIT: Also bear in mind you will need to establish how to control the backlight - this screen isn't visibile at all unless the backlight is turned on.

[mcuelenaere]

According to the Vision:M wiki page, the LCD panel is marked with the letters "V250QV", if that's the case its almost certainly in the same family as the LCD used in the Cowon D2:
 
http://www.neodns.co.kr/specpdf/tft/xLTV250QV-F0B.pdf

The datasheet gives details of the necessary power-up and power-down sequences, which you might be able to locate in the original firmware (locating those was the starting point for the D2 port).

The LTV250QV contains an S6F2002 LCD controller chip, but no information on this has been found yet. On the D2 this wasn't a problem, as the TCC7801 SoC provides its own interface to the LCD controller.

EDIT: Also bear in mind you will need to establish how to control the backlight - this screen isn't visibile at all unless the backlight is turned on.

Fantastic shotofadds! I will look into it...

[scharkalvin]

Is this one of the Zen players being worked on?
http://www.geeks.com/details.asp?invtid=DAP-HD0018-N&cat=MP3

[mcuelenaere]

Is this one of the Zen players being worked on?
http://www.geeks.com/details.asp?invtid=DAP-HD0018-N&cat=MP3

Not really, but as it uses the same firmware format (and the same OS) as the ZVM, it won't be very hard to make a new port to this one.

edit:
wiki is updated; some of the bootup progress of the firmware is documented

[bobbaluba]

I'm having some trouble using the zenutils by zook.
They worked great on my old computer, but on the other computers it doesn't work.

I get the extremely inhelpful error message:

C:\zen\bin>zen_crypt
Systemet kan ikke kjore angitt program.

Which means: System cannot run the specified program.

Any ideas?

Which OS are you using? What is in your %PATH%? Did you already tried compiling the source yourself?

Yes, but i can't figure out how to use cmake.
This is my %path%:
C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem

EDIT: I'm running winxp sp2

[mcuelenaere]

I'm having some trouble using the zenutils by zook.
They worked great on my old computer, but on the other computers it doesn't work.

I get the extremely inhelpful error message:

C:\zen\bin>zen_crypt
Systemet kan ikke kjore angitt program.

Which means: System cannot run the specified program.

Any ideas?

Which OS are you using? What is in your %PATH%? Did you already tried compiling the source yourself?

Yes, but i can't figure out how to use cmake.
This is my %path%:
C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem

EDIT: I'm running winxp sp2

CMake is as simple as installing it, running an Command Shell and running

Code: [Select]

cmake -g "Visual Studio 8 2005"

in the right folder.

Then you'd have to open up the zenutils.sln project and press Compile (it will give some warnings , if I remember correctly).

About the zen_crypt problem, are you sure it is in that directory (try 'dir' and see if zen_crypt.exe appears) and do you have the rights to execute it (since you're using WinXP, I suppose you're on an admin account so this couldn't be the problem)?

[GothPanda]

I recently discovered my creative to have a cracked screen, and even though the rest of the device is functioning, I can't make any real use out of it.  I was wondering, if I could donate it to the cause.  Will my screenless Zen Vision M help you in the mission of porting over the Rockbox?

[mcuelenaere]

I recently discovered my creative to have a cracked screen, and even though the rest of the device is functioning, I can't make any real use out of it.  I was wondering, if I could donate it to the cause.  Will my screenless Zen Vision M help you in the mission of porting over the Rockbox?

If a Rockbox Developer is willing to accept it and is willing to work on it, it will help porting it over to Rockbox. Although it will be difficult because there's no screen. But I believe you can get replacement screens on the internet, although I haven't found them yet.

[mcuelenaere]

I was just checking if zook's zenutils correctly encode/encrypt a decrypted TL block and it seems it doesn't. The problem lays in the CENC encoding routine, but as this goes far above my head so I can't do anything about it.

So development has (again) been stalled until another method is known to get code on the ZVM (I'm not going to use the FBOOT method if I'm not entirely sure that my code works).

If anyone who gots some experience with compression wants to take a look, all the files are on the wiki.

edit:
this is for people who want to do 'zen_crypt -e -m CENC':
in zen_crypt/source/main.cpp around line 352:

Code: [Select]

if (!shared::write_file(file, outbuf, sizeof(dword), len))

should be

Code: [Select]

if (!shared::write_file(file, outbuf, false, sizeof(dword), len))

edit2:
OK, so I was (partly) wrong: the CENC encoding used by zook is not the same as used by Creative, but it should be compatible (although at first sight it doesn't seem so on the ZVM).

edit3:
And as it seems, it isn't compatible; or I'm doing something wrong..

edit4:
Yeey! Great news! Apparantly there's a bypass: instead of using the TL block we can use an ordinary DATA block and set the filename to Hjukebox2.jrm and the OF then will skip the decryption and CENC decoding routine!

[Falafel]

This sounds like good news.
//But have you just reencoded the TL block?
edit: I should learn to read, but still. good news! Hope to hear more soon

[mcuelenaere]

This sounds like good news.
//But have you just reencoded the TL block?
edit: I should learn to read, but still. good news! Hope to hear more soon

The rest is on the wiki, but still I'm not there...
The problem now is the TL/FRESCUE structure; I've to find out how that one works. Luckily zook worked on that one a bit, but it isn't complete; so I can use any help I can get

[NicolasP]

mcuelenaere: Are you able to run custom code on the ZVM?

[mcuelenaere]

mcuelenaere: Are you able to run custom code on the ZVM?

No, not yet. I can't seem to find the code in the OF how jukebox2.jrm is parsed.
The structure is more or less described by zook at DellDJPort, but there are some unknown parts needed to get filled in and I can't figure them out atm.