---+!! Ipod/Itunes Communication %TOC% ---++ Introduction This page attempts to document how itunes detects that a specific USB device is an ipod. The knowledge in this page was gained during experimental attempts to get itunes to recognise non-ipod Rockbox devices running the Rockbox software USB stack and sync files to it as if it were an ipod. ---++ How to mimic an ipod Each of the following must be implemented in order for itunes to accept a USB device as an ipod. ---+++ Partition layout Your partition layout needs at least the following: 1 A data partition that *must* be partition 1 (unless partition 1 is of type 0). The physical location on disk is not important. 1 A partition of type 0 - the size, position and contents isn't checked by iTunes. The following has been confirmed working: <verbatim> Device Boot Start End Blocks Id System /dev/sdb1 1 1010 246409+ b W95 FAT32 - (formatted as FAT32) /dev/sdb2 1011 1012 488 0 Empty </verbatim> <verbatim> Device Boot Start End Blocks Id System /dev/sdb1 2 1000 243756 b W95 FAT32 - (formatted as FAT32) /dev/sdb2 1001 1012 2928 84 OS/2 hidden C: drive /dev/sdb3 1 1 213+ 0 Empty </verbatim> And this one, which is working on the main memory of an E280: <verbatim> Device Boot Start End Blocks Id System /dev/sdb1 1 1015 7803289 b W95 FAT32 /dev/sdb2 1016 1020 38440 84 OS/2 hidden C: drive /dev/sdb3 1021 1021 7688 0 Empty </verbatim> ---+++ XML info document [TODO] ---+++ USB VID/PID USB IDs of the various Ipod models are available on the DeviceDetection page. ---+++ Filesystem contents It looks like the only thing that is absolutely required is the /iPod_Control directory. Everything else will be created by iTunes as needed. ---++ Having fun by changing the ipod's capabilities The XML info document describes the various supported file formats and other features of the ipod. The following changes have been attempted: ---+++ Success * Removing the AAC capability from the ipod. * Increasing the maximum samplerate for WAV files to 96KHz ---+++ Failure * Itunes will play MP2 files, but refuse to sync them to an ipod. Simply copying the MP3 info from the XML file and replacing "MP3" with "MP2" didn't succeed in making itunes sync MP2 files. ---++ Setting the clock * Itunes sets the clock using a vendor specific WRITE BUFFER command. * To set the clock from a linux system, install sg3-utils, make a (binary) file containing (in hex here, date = 17 March 2009, 15:17:27) : 07 D9 00 4B 04 0F 11 1B 00 00 00 00 * The fields are as follows: * Year 2 bytes * Days since 1 Jan 2 bytes * timezone 1 byte (offset from GMT, counted in 15min intervals. 0==London, 4==Paris, 0x26==Adelaide(GMT+9:30),...) * hour 1 byte * minutes 1 byte * seconds 1 byte * DST 1 byte (0 = no DST, 1 = DST) * three zero bytes * run "sg_raw --send=12 -i datefile /dev/sdb 3b 01 00 0c 00 00 00 00 00 00" (as root, with of course the ipod being /dev/sdb here) ---++ Links * ipodlinux Device_Information page - http://www.ipodlinux.org/wiki/Device_Information * Big table of Ipod information - http://www.thismuchiknow.co.uk/?page_id=27 * Sample OS X application to dump the XML info document - http://www.thismuchiknow.co.uk/?p=28 * Ipod model numbers - http://download.banshee-project.org/podsleuth/ipod-model-table
14 Mar 2009 - 19:52
XML info document from Ipod Nano 3G firmware v1.1.3
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r11 - 21 Mar 2009 - 17:48:01 -
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