--- Log opened Tue Sep 27 00:11:18 2011
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11:07 < rf_> hi people
11:07 < rf_> does a datasheet for the Ipod classic display exist?
11:08 < rf_> I would like to use it for my beagleboard
11:08 < rf_> want to turn it into a portable device
11:09 < rf_> nobody knows?
11:14 < [7]> rf_: we don't have datasheets, but the knowledge gained from reverse engineering should be sufficient to do that
11:14 < [7]> interfacing it to a beagleboard might be tricky though
11:15 < [7]> from what it looks like it's an 6800 or 8080 style 18-bit parallel interface
11:16 < rf_> sorry i was on the tel
11:16 < rf_> aaa
11:16 < rf_> ok i understand
11:17 < [7]> so the lcd module might be too intelligent for a beagleboard
11:17 < [7]> those usually scan the panel in realtime
11:17 < rf_> I plan to make the beagle portable
11:17 < rf_> so i needed on small display
11:18 < rf_> another option was the Nokia N86 display
11:19 < rf_> well
11:19 < rf_> thanks for the help anyway
11:20 < [7]> rf_: something like this might be suited better: http://www.liquidware.com/shop/show/BB-ESK/Beagle+Embedded+Starter+Kit
11:20 < [7]> it's of course more expensive, but you'll get a touchscreen and battery in that shop as well
11:21 < [7]> (but yeah, $270 for a display is a damn lot)
11:21 < rf_> yeah not
11:21 < rf_> bad
11:22 < rf_> actually I just wanted something simple, I may sound crazy, but I want to turn the beagle into a rockboxdevice
11:23 < [7]> well, that's kinda overkill
11:23 < [7]> install xbmc on it and hook it up to your tv :)
11:24 < [7]> something like an ipod touch lcd might work with the beagle though, these are less intelligent
11:24 < rf_> haha
11:24 < [7]> however i'm not sure if someone has poked at the interfaces so far
11:24 < rf_> I know, but all the options did not have free I2s pins, for the extra 
11:25 < rf_> dac i needed, also usb host at the same time
11:25 < [7]> hm, you might be able to hack up something based upon mini2440/mini6410
11:25 < [7]> the the 2440 there's even a rockbox port
11:26 < rf_> before I went on this project I had a STM32 borad
11:26 < rf_> really?
11:26 < [7]> it has a touchscreen, and it has usb host (even if only 1.1 IIRC), but i'm not sure if it has extra i2s pins
11:27 < [7]> you might be able to hijack the ones from the on-board codec though
11:27 < rf_> was thinking the sam
11:27 < rf_> e
11:27 < [7]> what are you planning to do with the USB host though?
11:28 < [7]> it definitely won't be easy to get that going with rockbox's architecture
11:28 < rf_> hook up an USB-SATA bridge ic and run a 320gb 1.8" Toshiba sata disk
11:28 < rf_> yeah I know 
11:28 < [7]> you're basically trying to build a bulky ipod classic, eh? :)
11:28 < rf_> would need another "thread " just for the usb host
11:29 < rf_> exactly
11:29 < rf_> mooooooooooaaaaaaaaaaar power
11:29 < rf_> with the sata 2.6 feature
11:29 < [7]> what's not powerful enough about the classic?
11:30 < [7]> the CPU is certainly not as beefy as the beagles, but it runs at 216MHz or something stock
11:30 < rf_> to me actually only the internal DAC
11:30 < [7]> yeah, right, that cirrus dac isn't really a good one
11:30 < [7]> the wolfson-based ipods were certainly better
11:31 < rf_> that true
11:31 < rf_> people exhaustedly modded it
11:31 < [7]> i don't think anyone has ever tried modding the cirrus one from the software side though
11:31 < [7]> apple is writing to some undocumented registers on it, so there might actually be some room for improvement
11:32 < rf_> there are maybe some people who took out the capacitors
11:32  * [7] also vaguely remembers reading something about sound quality/power tradeoffs in the datasheet
11:33 < [7]> does the cirrus one even have caps?
11:33 < rf_> I think it must have on the way out to the line out
11:33  * [7] remembers some of these dacs directly driving the outputs
11:33 < rf_> well not on system
11:34 < [7]> i'm not sure if it was the cirrus one as well, but some of the sandisk players were capable of driving DC on the headphone outputs
11:34 < [7]> and the cirrus codec seems to have inverting charge pumps so it technically doesn't need the caps
11:34 < rf_> sandisk is not bad
11:35 < rf_> oh well
11:36 < rf_> did not read about explicitely, but there was a discussion on head-fi.org
11:36 < [7]> anyway, regarding a platform choice for a home-made DAP you might want to ask in #rockbox instead, there are more knowledgeable people over there
11:36 < rf_> I will
11:36 < rf_> thanks for the chat
11:36 < rf_> cheerio
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--- Log closed Wed Sep 28 00:09:18 2011