Android
Android userland for bc9 (1/2)

Setting up Android userland 2

Preparing Android userland

When build is finished, a set of Android userland will be built in

~/mydroid/out/target/product/generic/

For following reasons, we put a Android userland on a USB flash memory, not directory on gumstix's onboard FlashROM.

  • gumstix's jffs2 can't be accept mmap.
  • gumstix's onboard FlashROM is too small to put a Android userland (It requires almost 70M bytes space.)

Actual procedures are as follows.

  • Formating a USB flash memory with ext2 file system
    Connect a USB flash memory to the build machine. USB flash memory will be automatically mounted on /media/disk.
    # umount /media/disk
    # fdisk /dev/sdb1 (You may do this with gparted etc.)
    # mkfs.ext2 /dev/sdb1 (You may do this with gparted etc.)
  • Copying a built Android userland into a USB flash memory
    After formating and making file system, once disconnect a USB flash memory from build machine and re-connect it. Then:
    # cd /media/disk
    # mkdir android-root
    # cp -a /home/beat/mydroid/out/target/product/generic/root/* .
    # cp -a /home/beat/mydroid/out/target/product/generic/data/* data/  data 
    # cp -a /home/beat/mydroid/out/target/product/generic/system/* system/
    # chown -R root.root *
    # chmod -R 777 data/ system/
    # ls
    data          dev   init.goldfish.rc  proc  sys
    default.prop  init  init.rc           sbin  system
  • Fixing the init setting file and key layout file contents
    • Disable yaffs2 mount by commenting out yaffs2 mount strings in the init.rc.
      yaffs2 mount is only relevant to Android dev phone/G1 phone.
      diff -u init.rc.orig init.rc
      --- init.rc.orig	2009-03-31 12:50:16.000000000 +0900
      +++ init.rc	2009-03-31 12:57:19.000000000 +0900
      @@ -36,16 +36,16 @@
      
      # mount mtd partitions
           # Mount /system rw first to give the filesystem a chance to save a checkpoint
      -    mount yaffs2 mtd@system /system 
      -    mount yaffs2 mtd@system /system ro remount
      +//    mount yaffs2 mtd@system /system 
      +//    mount yaffs2 mtd@system /system ro remount
      
           # We chown/chmod /data again so because mount is run as root + defaults
      -    mount yaffs2 mtd@userdata /data nosuid nodev
      +//    mount yaffs2 mtd@userdata /data nosuid nodev
           chown system system /data
           chmod 0771 /data
      
          # Same reason as /data above
      -    mount yaffs2 mtd@cache /cache nosuid nodev
      +//    mount yaffs2 mtd@cache /cache nosuid nodev
           chown system cache /cache
           chmod 0770 /cache
  • Modifying the hardware key behavior assignment file
    system/usr/keylayout/qwerty.kl
    Modify this file as follows:
    diff -u qwerty.kl.orig qwerty.kl.new 
    --- qwerty.kl.orig	2009-03-31 13:20:22.000000000 +0900
    +++ qwerty.kl.new	2009-03-31 13:36:09.000000000 +0900
    @@ -12,8 +12,8 @@
     key 158   BACK              WAKE_DROPPED
     key 230   SOFT_RIGHT        WAKE
     key 60    SOFT_RIGHT        WAKE
    -key 107   ENDCALL           WAKE_DROPPED
    -key 62    ENDCALL           WAKE_DROPPED
    +key 107   ENDCALL           WAKE
    +key 88    ENDCALL           WAKE
     key 229   MENU              WAKE_DROPPED
     key 139   MENU              WAKE_DROPPED
     key 59    MENU              WAKE_DROPPED
    @@ -26,12 +26,14 @@
     key 232   DPAD_CENTER       WAKE_DROPPED
     key 108   DPAD_DOWN         WAKE_DROPPED
     key 103   DPAD_UP           WAKE_DROPPED
    -key 102   HOME              WAKE 
     key 105   DPAD_LEFT         WAKE_DROPPED
     key 106   DPAD_RIGHT        WAKE_DROPPED
     key 115   VOLUME_UP
     key 114   VOLUME_DOWN
     key 116   POWER             WAKE
    +key 63	  MENU	            WAKE
    +key 66    HOME              WAKE
    +key 67	  BACK	            WAKE
     key 212   CAMERA
     
     key 16    Q
    This modifiction enabled "Go to home" key behavior.
    When you want to check what key on keyboard is refered by a number, please see this include file.
    ~/gumstix/gumstix-oe/tmp/work/gumstix-custom-verdex-angstrom-linux-gnueabi/gumstix-kernel-2.6.24-r1/linux-2.6.24/include/linux/input.h

by Satoshi OTSUKA

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Last-modified: 2009-04-14 (Tue) 07:58:58 (3139d)