Rockbox Development > New Ports
Cowon D2
shotofadds:
--- Quote from: samokhov on August 10, 2009, 07:19:49 AM ---vodi, it's probably the same problem that we've been talking about earlier: the lack of single-bit error correction. I presume that SD cards are quite capable of generating single-bit errors as well ::)
--- End quote ---
Actually, that's almost certainly not the case. SD cards and the internal memory both use NAND flash chips for storage, but SD cards have error-correction and an FTL built into the hardware itself. The internal NAND does not have this, so Rockbox has to implement these functions itself in software, hence the potential for bugs!
I've also seen occasional problems when skipping tracks (music stops and the WPS becomes unresponsive except for pressing POWER to return to the menu). Not sure what's causing that, but it seems a fairly recent problem. I get the same behaviour if I use PictureFlow to change tracks, but this usually only happens if I control PictureFlow with the touchscreen rather than physical buttons. How strange.
ezzieyguywuf:
I am interested in working on the touchscreen code. I think that what I'd like to do first is touch up the 3X3 stuff and then maybe get into the "absolute" touchscreen stuff. I have a little bit of coding experience, not tons, but I'm an engineer and like a good problem to solve ;D
Step one for me would be to get rather familiar with all things touch screen related. I've seen this (http://svn.rockbox.org/viewvc.cgi/trunk/apps/keymaps/keymap-touchscreen.c?view=markup ) source file. I understoood mainly what was going on. What I need next is for some of you guys to point me to the right files that actually use this keymap. I unsuccesfully searched for them last night.
Step two is I want to add some new keys to that key map. I think I saw some discussion on something like this waaaaay back. But, similar to the current D2 firmware, a swipe from top to bottom would scroll down etc... I think this could me implemented rather easily by defining a new key as Top-middle-bottom with some maximum time period in between.
Those two steps in themselves should keep me busy for a while, and I'm hoping that they'll get me familiar enough with Rockbox to really add some functionality to the touchscreen support.
So, waddaya got?
alfchin:
I'am very sorry to trouble you but I think I'am facing a difficult situation while installing rockbox on some D2+,which Orginal Firmware is 3.11 when it comes from their manufactory,and which are sold in Korea.
I've used the same way to make the patched firmware of 3.11/2.11 as I did to those of 2.02/3.02.
However,it doesn't work on those new D2+.Also this kind of New D2+ can only flash the FW of 3.11/2.11,even with the help of TCC Tool.Neither does the bootloader with SD Driver work.
Could you please help me,please
shotofadds:
--- Quote from: alfchin on August 11, 2009, 10:15:56 AM ---Also this kind of New D2+ can only flash the FW of 3.11/2.11,even with the help of TCC Tool.Neither does the bootloader with SD Driver work.
--- End quote ---
So you're saying for example that the D2+ firmware 3.02 doesn't work on your player? I think this might be the same issue seen here: http://iaudiophile.net/forums/showthread.php?t=30037
Can you try shining a bright light at your D2+ and see if anything is visible with either FW 3.02 or Rockbox?
If so we can be sure there are different variants of the D2+ that have different LCD backlight handling. If that's the case, someone will need to sit down with a disassembly of 3.02/3.11 and work out what the difference in backlight handling is...
alfchin:
--- Quote from: shotofadds on August 11, 2009, 04:13:20 PM ---
--- Quote from: alfchin on August 11, 2009, 10:15:56 AM ---Also this kind of New D2+ can only flash the FW of 3.11/2.11,even with the help of TCC Tool.Neither does the bootloader with SD Driver work.
--- End quote ---
So you're saying for example that the D2+ firmware 3.02 doesn't work on your player? I think this might be the same issue seen here: http://iaudiophile.net/forums/showthread.php?t=30037
Can you try shining a bright light at your D2+ and see if anything is visible with either FW 3.02 or Rockbox?
If so we can be sure there are different variants of the D2+ that have different LCD backlight handling. If that's the case, someone will need to sit down with a disassembly of 3.02/3.11 and work out what the difference in backlight handling is...
--- End quote ---
Thank you for your help.
Here's the result:
When I flash to 3.11 patched firmware,and try to start Rockbox,however,there's nothing displaying on the screen with a bright light,just like it is powered of .Only when I used reset could I went into its orginal firmware .
When I tried to flash 3.02 to the player,I can see the screen of the firmware update.However,when I tried to turn it on,I found its screen all blank,just like above.The computer can detect it as an normal D2+ when I connected it by USB cable.Then I have to flash 3.11 back,using the normal way.The firmware update procedure displayed nothing,and after it finished,d2+ can load 3.11,proving that the update was sucessful.
I guess that the new D2+s use a new LCD,which cannot drive it in the old way.
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