{"id":1025,"date":"2013-01-11T14:51:49","date_gmt":"2013-01-11T14:51:49","guid":{"rendered":"http:\/\/41j.com\/blog\/?p=1025"},"modified":"2013-01-13T04:18:59","modified_gmt":"2013-01-13T04:18:59","slug":"lifetouch-note","status":"publish","type":"post","link":"https:\/\/41j.com\/blog\/2013\/01\/lifetouch-note\/","title":{"rendered":"Lifetouch note notes"},"content":{"rendered":"

Accessing APX Mode<\/h2>\n

\"lifenote<\/a><\/p>\n

There’s a unplaced switch just above the Nvidia Tegra 250 CPU shield (see image above). Connect pins 3 and 4 of SW2 while pressing the power button to enable APX mode.<\/p>\n

Flashing a partition using nvflash<\/h2>\n

nvflash –bl \/usr\/lib\/nvflash\/fastboot.bin –download 11 .\/lubuntu-12.10-preinstalled-desktop-armhf+ac100.bootimg<\/p>\n

The Lifetouch note appears to have the LNX partition on partition 11, not 6 as the ac100.<\/p>\n

Note: The ac100 bootimage does NOT work. The screen does some funky stuff, but nothing to indicate that it’s actually booting a kernel. (update: The SOSBoot kernel boots and the serial console works, but not the display.)<\/p>\n

Partition table<\/h2>\n

The partition table can be dumped with nvflash –bl –getpartitiontable , mine is as follows:<\/p>\n

\r\nPartitionId=2\r\nName=BCT\r\nDeviceId=18\r\nStartSector=0\r\nNumSectors=1536\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=3\r\nName=PT\r\nDeviceId=18\r\nStartSector=1536\r\nNumSectors=128\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=4\r\nName=EBT\r\nDeviceId=18\r\nStartSector=1664\r\nNumSectors=1024\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=5\r\nName=NVC\r\nDeviceId=18\r\nStartSector=2688\r\nNumSectors=256\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=6\r\nName=MBR\r\nDeviceId=18\r\nStartSector=2944\r\nNumSectors=512\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=7\r\nName=MSC\r\nDeviceId=18\r\nStartSector=3456\r\nNumSectors=1024\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=8\r\nName=MFG\r\nDeviceId=18\r\nStartSector=4480\r\nNumSectors=76800\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=9\r\nName=SOS\r\nDeviceId=18\r\nStartSector=81280\r\nNumSectors=2560\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=10\r\nName=ER1\r\nDeviceId=18\r\nStartSector=83840\r\nNumSectors=128\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=11\r\nName=LNX\r\nDeviceId=18\r\nStartSector=83968\r\nNumSectors=4096\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=12\r\nName=ER2\r\nDeviceId=18\r\nStartSector=88064\r\nNumSectors=128\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=13\r\nName=APP\r\nDeviceId=18\r\nStartSector=88192\r\nNumSectors=98304\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=14\r\nName=ER3\r\nDeviceId=18\r\nStartSector=186496\r\nNumSectors=128\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=15\r\nName=CAC\r\nDeviceId=18\r\nStartSector=186624\r\nNumSectors=76800\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=16\r\nName=ER4\r\nDeviceId=18\r\nStartSector=263424\r\nNumSectors=128\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=17\r\nName=USP\r\nDeviceId=18\r\nStartSector=263552\r\nNumSectors=128000\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=18\r\nName=ER5\r\nDeviceId=18\r\nStartSector=391552\r\nNumSectors=128\r\nBytesPerSector=2048\r\n\r\n\r\nPartitionId=19\r\nName=UDA\r\nDeviceId=18\r\nStartSector=391680\r\nNumSectors=3520000\r\nBytesPerSector=2048\r\n\r\n<\/pre>\n
nvflash output<\/h2>\n
\r\nnvflash --bl \/usr\/lib\/nvflash\/fastboot.bin --download 11 .\/ubuntu-12.04-preinstalled-desktop-armhf+ac100.bootimg\r\nNvflash started \r\nrcm version 0X20001                                \r\nSystem Information:                               \r\n   chip name: t20                                 \r\n   chip id: 0x20 major: 1 minor: 3                        \r\n   chip sku: 0x8                                  \r\n   chip uid: XXXXXX                   \r\n   macrovision: disabled                          \r\n   hdcp: enabled                                  \r\n   sbk burned: false                                       \r\n   dk burned: false                                                      \r\n   boot device: emmc                                                                     \r\n   operating mode: 3                                                                                        \r\n   device config strap: 0                                              \r\n   device config fuse: 0                           \r\n   sdram config strap: 0                                           \r\n                                                                   \r\ndownloading bootloader -- load address: 0x108000 entry point: 0x108000                                  \r\nsending file: \/usr\/lib\/nvflash\/fastboot.bin                                                  \r\n| 940112\/940112 bytes sent  \r\n\/usr\/lib\/nvflash\/fastboot.bin sent successfully                \r\nwaiting for bootloader to initialize                                                             \r\nbootloader downloaded successfully                                \r\nsending file: .\/ubuntu-12.04-preinstalled-desktop-armhf+ac100.bootimg                   \r\n\/ 8388608\/8388608 bytes sent                                                                       \r\n.\/ubuntu-12.04-preinstalled-desktop-armhf+ac100.bootimg sent successfully\r\n<\/pre>\n
PCB Images:<\/p>\n\n\t\t