Ingenic Jz4740/Jz4732 players

[ocean]

i've just bought a 747+ (if it is of use is DXT VX747+ fw version 1.0) clone that is for sure chinachip/jz47**, though there isn't a firmware backup in the cd included with player, wanted to experiment with rockbox/firmware upgrading, but i don't want to break it so i would like to know if there's a way to backup firmware (have done some search but haven't found anything so far only how to write firmware with 747write tool but not how to backup if it is possible at all).

regards
ocean

[mcuelenaere]

i've just bought a 747+ (if it is of use is DXT VX747+ fw version 1.0) clone that is for sure chinachip/jz47**, though there isn't a firmware backup in the cd included with player, wanted to experiment with rockbox/firmware upgrading, but i don't want to break it so i would like to know if there's a way to backup firmware (have done some search but haven't found anything so far only how to write firmware with 747write tool but not how to backup if it is possible at all).

regards
ocean

The VX747, VX747+ and VX777 firmwares are interchangeable (they're mostly the same hardware); so if you would brick your device it is still reparaible through the OF (Original Firmware) recovery software.

Also, currently Rockbox doesn't require you (and it isn't possible either) to flash it to your device, it is purely run from RAM and gets it data from an SD card.

edit:
To all people who are having trouble with SD(HC) cards: I finally got myself an 8GB SDHC card which triggers the ATA -1 or ATA 18 behaviour; expect a fix soon.

[ocean]

The VX747, VX747+ and VX777 firmwares are interchangeable (they're mostly the same hardware); so if you would brick your device it is still reparaible through the OF (Original Firmware) recovery software.

Also, currently Rockbox doesn't require you (and it isn't possible either) to flash it to your device, it is purely run from RAM and gets it data from an SD card.

i already read about 747write (that's the OF recovery software linked in the wiki) but it needs the original firmware (or am i wrong?), i don't have access to the original firmware (that clone produced by DXT don't include it in the cd), so it would be nice if there's a way to access (rebuild?) the original hxf (to avoid losing possible customization to the firmware done from the clone factory), maybe usb/jz4740 tools can be used somehow?

[mcuelenaere]

i already read about 747write but it needs the original firmware (or am i wrong?), i don't have access to the original firmware (that clone produced by DXT don't include it in the cd), so it would be nice if there's a way to access (rebuild?) the original hxf (to avoid losing possible customization to the firmware done from the clone factory), maybe usb/jz4740 tools can be used somehow?

Hmm yes, well you can't access the OF as the NAND FTL isn't figured out.. And the OF HXF is stored somewhere before/after the FAT partition on the NAND..
There is access to raw NAND though, but unless you have access to what FTL Chinachip used I don't think it's of any good to you..

But like I said, currently Rockbox doesn't require any changes to the NAND (in fact, NAND write access is disabled in the Rockbox driver) and it's purely run from RAM over USB (+ SD for storage).

(edit by funman : replace FLT by FTL -Flash Translation Layer-)

[ocean]

i'll try running latest rockbox build on ram.

btw, since it's stored on the nand, couldn't it be possible to read "behind the fat partition" with a raw read, for example from linux /dev/ (i don't know why but my linux 2.6.30 doesn't recognize the fat partition, while recognizes the sd card partition, windows recognizes the fat partition so maybe "the answer" is in the windows driver?).

thanks for being so patient replying to my questions.

regards
ocean

[mcuelenaere]

i'll try running latest rockbox build on ram.

btw, since it's stored on the nand, couldn't it be possible to read "behind the fat partition" with a raw read, for example from linux /dev/ (i don't know why but my linux 2.6.30 doesn't recognize the fat partition, while recognizes the sd card partition, windows recognizes the fat partition so maybe "the answer" is in the windows driver?).

thanks for being so patient replying to my questions.

regards
ocean

No, this has nothing to do with the host side when accessing it over USB in the OF, NFTL stands for NAND Flash Translation Layer; it consists of some special algorithms in order to reduce page wearout and other NAND peculiarities.

This is implemented in the OF as a layer on top of the raw NAND, so it is completely transparant to the 'outside' world. But as we're not on the outside, but on the inside we need to understand how this mapping works in order to access the FAT partition.

[Gametot]

Hello mcuelenaere

've A question on which player is best on rockbox.
At a Onda VX747 or VX777?

And yet what did you experience with the clones of the pasen pasen itouch LE 4GB running since rockbox is the same hardware.

I Thank you

[mcuelenaere]

Hello mcuelenaere

've A question on which player is best on rockbox.
At a Onda VX747 or VX777?

And yet what did you experience with the clones of the pasen pasen itouch LE 4GB running since rockbox is the same hardware.

I Thank you

I suppose currently a VX747, as this one has some physical buttons and not all of Rockbox has been adjusted to work with a touchscreen.

I only have a VX747, so I can't comment on how good Rockbox works with any clones; but I think it shouldn't give any problems..

[mcuelenaere]

Good news!

It's now possible to permanently 'stick' Rockbox on your device!

Just follow the instructions at the wiki page and upgrade the OF firmware like you'd do with a normal firmware upgrade.

Make sure you put either ccpmp.bin (the OF) or a Rockbox installation on your SD card or you'll need to re-install your DAP.

[Gametot]

Hello mcuelenaere

   
I've a question.
If rockbox for the vx747 + also supports the camera?

i thank you

Gametot

[mcuelenaere]

I've a question.
If rockbox for the vx747 + also supports the camera?

No, currently there's no camera driver in Rockbox for the VX747+ (nor is there for any other target, like the M:Robe 500).

[Gametot]

Good news!

It's now possible to permanently 'stick' Rockbox on your device!

Just follow the instructions at the wiki page and upgrade the OF firmware like you'd do with a normal firmware upgrade.

Make sure you put either ccpmp.bin (the OF) or a Rockbox installation on your SD card or you'll need to re-install your DAP.

is also the boot loader with a vx747 +
Because the player is indeed a different firmware than the vx747

[mcuelenaere]

is also the boot loader with a vx747 +
Because the player is indeed a different firmware than the vx747

No, currently the VX747+ firmware is identical to the VX747 one.
The only difference is for the VX777 build, and I would appreciate it if anyone could give me feedback about installing the bootloader on such a device.

[slowmoe]

i get an error when i try to replace the ccpmp.bin.

[INFO] Searching for ccpmp.bin...
[ERR]   Cannot read from vx777.hxf

[no1be4me]

i get an error when i try to replace the ccpmp.bin.

[INFO] Searching for ccpmp.bin...
[ERR]   Cannot read from vx777.hxf

I had a similar issue. The command seems to be case sensitive. Rename the file using caps on. (VX777.HXF).
Hopes this helps. I never could get it to work with the 777 firmware. Worked great with the 747 firmware hmm go figure