Rockbox Development > New Ports
Cowon D2
funman:
BTW would replacing the MMU setup in crt0.S by calls to mmu-armv4.S help debug this?
(with respect to caches)
Alex_Nsk:
Hi! Is there are anybody who really knows in what formats audio data is transfered into the codec from SoC Telechip? Right now I'm trying to use more audiophile version of DAC with D2+ DAP. Just cant establish connection in both I2S and Left justified/right justified 16/24 bit formats. There is or digital noise or very very quiet sound in most lucky case...Is there are DSP/PCM mode??? Is it could be changed by rockbox software??
saratoga:
--- Quote from: Alex_Nsk on September 17, 2010, 12:27:32 AM ---Hi! Is there are anybody who really knows in what formats audio data is transfered into the codec from SoC Telechip? Right now I'm trying to use more audiophile version of DAC with D2+ DAP. Just cant establish connection in both I2S and Left justified 16/18/20/24 bit formats. There is or digital noise or very very quiet sound in most lucky case...Is there are right justified standart???
--- End quote ---
According to the WM8985 datasheet, it supports all of those formats, see the "device description" chapter, and register 0x04 specifically.
BurntOfferings:
Hello there! can I an any way help with getting Line-in working? That feature is really important for me, but I have no clue where to start... I'm not a total newbie in programming, but I have no clue how reverse-engineering a firmware is done. Nonetheless, I'll try my best to get that working :P
preglow:
--- Quote from: BurntOfferings on September 23, 2010, 07:11:47 PM ---Hello there! can I an any way help with getting Line-in working? That feature is really important for me, but I have no clue where to start... I'm not a total newbie in programming, but I have no clue how reverse-engineering a firmware is done. Nonetheless, I'll try my best to get that working :P
--- End quote ---
I'm actually kinda working on this at the moment. Line in seems to be what is connected to the audio interface by default, so it should just be a matter of configuring the 7801 correctly and writing interrupt handlers. Making the builtin mic work will require some disassembly work to figure out where the input select multiplexer is connected.
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