Cowon D2

[tomers]

I hear clicks on internal and on external memory. I didn't find info about "'hearing' flash memory activity" on bugs forum.

This is what shotofadds said of this issue:

Yes, I hear these clicks too (usually 3 in a row when starting or stopping a track). I'm not sure what is causing them, all I know is that when i first implemented playback on the D2 there were no clicks at all, except at power on/off. Something's obviously broken.

I'm almost sure I've heard about it somewhere. I don't remember when or where. I think similar bug affects the Sansa e200. I believe the HW is not configured properly. Since I hear this noises immediately after power up, I assume some HW initialization is missing or is done incorrectly.

You can hear these noises really good when deleting a large directory. Try duplicating the .rockbox directory, then start Rockbox and delete the copy. It will take a while to delete the entire directory, and you will hear every bit that gets deleted 

shotofadds: Is it possible that audio is not muted (HW-wise) while the DAP is not playing any audio. This suggestion is just a shot in the dark, as I have absolutely no knowledge about it.

Talking about it, I couldn't find any specsheet for the DAP's SoC in the Wiki page. Did you use some documentation for implementation of the D2, or did you only reversed engineered the OF?

[foth]

Talking about it, I couldn't find any specsheet for the DAP's SoC in the Wiki page. Did you use some documentation for implementation of the D2, or did you only reversed engineered the OF?

This is for shotofadds  , i think. I'd like to help in D2 Rockbox progress, but I'm not a programmer at all...

I think for Russian (and Ukraine, Belarus, Kazakh,..., German) language, and maybe for classic music MAX_PATH value is TOO small. I'm not the only one who experienced this problem in Rockbox. The standard firmware supports this path names and has pretty good battery life. Mabe we can increase MAX_PATH at least to 320 FOR D2?


I'd like to share my fmr file for Tomsk Russia, but get "Access Denied".
Tis is the file:

Code: [Select]

99750000:ТВ-2
101700000:Хит FM
102100000:Русское Радио
102550000:Ретро FM
103400000:Европа Плюс
103800000:Динамит FM
104600000:Радио Сибирь
105000000:Эхо Москвы
105400000:Авторадио
106100000:Наше Радио
106600000:Радио Маяк
107100000:Love - Радио

[tomers]

I think for Russian (and Ukraine, Belarus, Kazakh,..., German) language, and maybe for classic music MAX_PATH value is TOO small. I'm not the only one who experienced this problem in Rockbox. The standard firmware supports this path names and has pretty good battery life. Mabe we can increase MAX_PATH at least to 320 FOR D2?

Please bring this subject on IRC, or in the Rockbox general discussion forum, so that other developers can participate in the discussion. I have no opinion for that matter.

I'd like to share my fmr file for Tomsk Russia, but get "Access Denied".

Posting your file here will not help. Please ask in IRC how to post it.

[GodEater]

I think for Russian (and Ukraine, Belarus, Kazakh,..., German) language, and maybe for classic music MAX_PATH value is TOO small. I'm not the only one who experienced this problem in Rockbox. The standard firmware supports this path names and has pretty good battery life. Mabe we can increase MAX_PATH at least to 320 FOR D2?

Firstly, why does the language you're using make any difference to the length of MAX_PATH you need?

Secondly, a change such as this wouldn't affect only the D2, but every Rockbox target.

[foth]

I think for Russian (and Ukraine, Belarus, Kazakh,..., German) language, and maybe for classic music MAX_PATH value is TOO small. I'm not the only one who experienced this problem in Rockbox. The standard firmware supports this path names and has pretty good battery life. Mabe we can increase MAX_PATH at least to 320 FOR D2?

Firstly, why does the language you're using make any difference to the length of MAX_PATH you need?

Secondly, a change such as this wouldn't affect only the D2, but every Rockbox target.

Russian (German,Ukraine,...) words are longer then English.

[mbk1969]

Firstly, why does the language you're using make any difference to the length of MAX_PATH you need?

It could take up to three bytes to encode (to code) one `national` (i.e. not latin) symbol in UTF. If firmware works with file paths in UTF then programmer must be aware of such possible buffer overrun problem. (In UNICODE the size of every symbol is two bytes.)

If file system tolerates using of such long names then problem lays within firmware source code.

update: I asked my colleague (specialist in file systems) and he stated that in FAT long file names are stored in UNICODE

[Ton]

I don't know if this is the right place to mention it. If not, please tell me.
Also, I posted about this too in the iAudiophile forums.

Imo there is a fault in the D2 manual, regarding firmware numbers, which could cause confusion. On page 15 it says that for D2+ and 1.xx or 3.xx, you need D2_P.bin and for 2.xx and 4.xx D2N_P.bin. As far as I can see it should be the other way around.

[shotofadds]

I answered this on your other post:

The 2.xx and 3.xx firmwares are non-DAB/DMB, and the filename indicates this with the 'N' suffix.

So, yes, it looks like the instructions are wrong and they should be fixed.

[4nykey]

The 2.xx and 3.xx firmwares are non-DAB/DMB, and the filename indicates this with the 'N' suffix.

So, yes, it looks like the instructions are wrong and they should be fixed.

This was taken from the wiki: http://www.rockbox.org/wiki/CowonD2Info#Installation, so it'll also need an update.

[markV]

Yes, there's already a patch to do this on Flyspray (FS#10698). There was some discussion about whether it can be included in the main build or not - I think in the end we came to the conclusion that nobody was going to die if it got committed. So I'll look to get it in soon - in the New Year most likely.

Is your patch FS#10698 (hold-mode buttons) included in the main build / svn tree now?

[shotofadds]

No not yet. I'll try and do it soon, but I haven't really had much time for Rockbox work recently.

[tomers]

Color depth of Cowon D2's LCD screen

According to JetAudio's web site, the LCD screen is 24-bit (16 million colors), but the D2's configuration file contains the following line:

#define LCD_DEPTH  16

I wonder why this value is not set to 24. There is no other player whose LCD_DEPTH is >16, therefore it could be that Rockbox does not support higher values.

I would be glad if someone can clarify this.

[shotofadds]

....it could be that Rockbox does not support higher values.

You said it. There's no 24-bit (RGB 888) LCD driver in Rockbox, and there wouldn't be a huge advantage writing one just for the D2, since according the LCD datasheet it is actually only 18-bit. Cowon's UI also uses 16-bit, btw (although it's possible it achieves a higher depth using native YUV mode for video playback...)

[Josef K.]

I'm planing to buy D2+ (I'm afraid it'll be unavailable soon).

Newer D2+ hardware revisions use an updated power management chip, and some
functionality is not yet implemented on these players (eg. touchscreen support).

So my question is: is there a touchscreen support (3x3 Grid mode) in Rockbox for newer D2+ version? And, if it's not, is it still possible to use Rockbox just with DAPs buttons?

Thanks a lot for an answer!

[markV]

Regarding the read-only internal flash - does anyone works on it?

No, no-one's working on it now. I've spent months looking into this, and in my opinion providing write support (compatible with the Cowon firmware) would require a collossal amount of further effort, and we would almost certainly fall foul of some FTL-related patents.

The current situation of booting from an SD card works perfectly well for me, and from the lack of complaints, it seems the majority of users don't mind either. The only difficulty I am aware of is that RbUtil doesn't know about the need to unzip .rockbox to the SD card.

Then if we make RbUtil automatically detect and choose the SD card as the installation point (if no card inserted it would prompt the user), then can we declare the D2 as a stable target? The touchscreen is ugly and unintuitive to work with at the moment, but it does work and provide full functionality. I really like to see this platform getting stabilized :-)

Hi developers !

I am using Rockbox on my D2 since the time it's able to write on the SD card (even before that). 

I used to install from svn and everything was fine.  Then last time I update from RButil to see what was going on there... 

Wow !  I installed themes and all...  I must say Rockbox make my D2 really better !!!  Compared to OF, among others: easier to use (in general and, particularly playlists), giving a better database management, a real "resume play" on start up, nice usable themes !  At first I thought I would miss the "absolute point" touchscreen mode, but this touchscreen, being relatively small, is more functional and easier to use in 3x3 mode.

Thanks, great work !

MarkV