Shai at 14:24, 15 December 2009

2009-12-15T14:24:24Z

Mike: 1 revision(s)

2009-06-16T06:59:45Z

1 revision(s)

Mike at 06:58, 16 June 2009

2009-06-16T06:58:32Z

Mike: 1 revision(s)

2009-06-08T12:46:32Z

1 revision(s)

Mike: Android for Exeda moved to Exeda Android

2009-06-08T12:35:49Z

Android for Exeda moved to Exeda Android

New page

== Introduction ==
Android is a set of software for mobile devices, developed by Open Handset Alliance. The [http://www.compulab.co.il/exeda/download/exeda-android.zip CompuLab Android package for Exeda] includes NAND flash image, Linux kernel configuration and source code patches, and patches and configuration files used to build the Android image.

{{Important|The CompuLab Android package for the Exeda is based on Android 1.0 and it is provided "as-is", without maintenance or technical support}}

== Package contents ==
=== images ===
* {{filename|android.jffs2}} - ready to run image for Exeda NAND flash
* {{filename|android.tar.bz2}} - archive of root file system used for JFFS2 image creation

=== kernel ===
* {{filename|kernel-2.6.25-exeda.jffs2}} - JFFS2 image of Linux kernel 2.6.25 with Android and Exeda patches
* {{filename|linux-2.6.25-exeda.patch}} - cumulative patch vs. [http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.25.tar.bz2 Linux kernel 2.6.25] including modifications and additions made by the Android team as well as support for the Exeda peripherals
* {{filename|uImage-2.6.25-exeda}} - kernel image that can be used for network boot

=== patches ===
This directory contains a set of patches required to build Android for the Exeda. The patches were generated vs. "android-1.0" release.
There is a patch per Android subproject, each patch named by subproject path inside the Android tree with '''/''' replaced by '''_'''.
For instance the patch for {{filename|packages/apps/Settings}} is named {{filename|packages_apps_Settings.patch}}

The only exception is
* {{filename|exeda_build.tar.bz2}} - additions to Android build system required to build Android for the Exeda

== Image installation ==
* Follow the steps in [[Linux_Development_for_XScale_modules#Networked_Root_Filesystem|Networked Root Filesystem Guide]]. The root filesystem for the Exeda can be extracted from {{filename|images/android.tar.bz2}}.
* Disable automatic Android startup for the networked root filesystem:
<pre>
rm /path/to/exeda/root/etc/rc5.d/S99zzzandroid
</pre>
* Make sure to power off the Exeda
* Connect Exeda Ethernet port to your local Ethernet
* Connect your host PC to the Exeda via a null modem cable supplied with the Eval Kit.
* Start terminal emulation software on your PC using the COM port to which the null modem is connected. Set baud rate to 115200 bps, 8 bit per frame, 1 stop bit, no parity, no flow control.
* Power up the Exeda. U-Boot will start and you will get the command prompt in your terminal program.
{{Note|If the boot settings of your Exeda are set to load the operating system, you may need to press and hold ^C while turning the Exeda on, in order to get command prompt.}}
* You can use U-boot {{cmd|dhcp}} command to obtain IP address or manually set {{parameter|ipaddr}} and {{parameter|serverip}} environment variables:
<pre>
> setenv serverip <host ip address>
> setenv ipaddr <Exeda ip address>
> saveenv
</pre>
* Next environment settings are passed to Linux Kernel and are needed for NFS root:
<pre>
> setenv bootargs "root=/dev/nfs nfsroot=<your host ip>:/path/to/rootfs console=ttyS0,115200 ip=dhcp"
</pre>
* Use the following U-boot command to boot Linux on Eexeda:
<pre>
> tftp a0100000 uImage && bootm
</pre>
* After the image is loaded you will get Linux login prompt. Login as {{parameter|root}} with password {{parameter|111111}} into the system.
* Copy the kernel and Android jffs2 images from the Android package to NFS share, so you can access them from Exeda.
* Now you can install kernel and filesystem images to the NAND flash from NFS share using standard Linux MTD utilities ({{cmd|flash_eraseall, nandwrite}}).
* After the installation procces completed successfully, U-Boot on Exeda needs the following environment variables set prior to booting from NAND flash:
<pre>
> setenv boot_mode "android"
> setenv nand_mode "on"
> setenv bootargs "root=/dev/mtdblock1 rootfstype=jffs2 console=ttyS0,115200"
> setenv bootcmd "fsload && bootm"
> saveenv
</pre>
* Now you can reboot the Exeda and it will boot Android from the internal NAND flash.
{{Note|First boot takes relatively much time because the system performs a lot of one-time initialization tasks}}

== Building Android for Exeda ==
=== Linux kernel ===
* Download Linux kernel source from preferred mirror
* Unpack it to some directory
* Apply the Exeda patchset
* Set environment variables ARCH, and CROSS_COMPILE so that kernel build system cross compile the kernel
* Build the kernel

<pre>
mkdir /home/development/exeda/kernel
cd /home/development/exeda/kernel
wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.25.tar.bz2
tar xjf linux-2.6.25.tar.bz2
cd linux-2.6.25
cat /path/to/exeda-android/kernel/linux-2.6.25-exeda.patch | patch -p1
export ARCH=arm
export CROSS_COMPILE=arm-linux-
make exeda_defconfig
make menuconfig
make uImage
</pre>

In the above example, the Linux kernel image ({{filename|1=uImage}}) will be created in {{filename|1=/home/development/exeda/kernel/linux-2.6.25/arch/arm/boot}}

=== Android ===
* Setup Android working environment as described at [http://source.android.com/download Get Source] page of [http://source.android.com/ Android Open Source Project] website
* Unpack {{filename|exeda_build.tar.bz2}} to the Android working directory
* Apply the Exeda patchset
* Select Exeda platform using {{parameter|choosecombo}} command
* Build Android

<pre>
cd ~/mydroid
tar xjf /path/to/exeda-android/pacthes exeda_build.tar.bz2
for file in /path/to/exeda-android/pacthes/*patch; do
prj=`basename $file .patch | sed -e 's|_|/|g'`
cd $prj
cat $file | patch -p1
cd -
done
choosecombo false release exeda
make
</pre>

== Known problems and limitations ==
* Off-line battery charging is not implemented
* Resume from suspended state may fail
* SD card hotplug sometimes fails
* Wifi connection to secure networks sometimes fails

== See also ==
* [http://www.android.com/about/ What is Android?]
* [http://source.android.com/ Android Open Source Project]
* [http://developer.android.com/ Android Developers]
* [[Linux Development for XScale modules]]

← Older revision		Revision as of 14:24, 15 December 2009
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	* [http://developer.android.com/ Android Developers]		* [http://developer.android.com/ Android Developers]
	* [[Linux Development for XScale modules]]		* [[Linux Development for XScale modules]]
		+
		+	[[Category:Linux]]
		+	[[Category:EXEDA]]

← Older revision	Revision as of 06:59, 16 June 2009
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@@ Line 23: / Line 23: @@
 == Image installation ==
 * Follow the steps in [[Linux_Development_for_XScale_modules#Networked_Root_Filesystem|Networked Root Filesystem Guide]]. The root filesystem for the Exeda can be extracted from {{filename|images/android.tar.bz2}}.
 * Disable automatic Android startup for the networked root filesystem:

← Older revision	Revision as of 12:46, 8 June 2009
(No difference)

Exeda Android - Revision history

Shai at 14:24, 15 December 2009

Mike: 1 revision(s)

Mike at 06:58, 16 June 2009

Mike: 1 revision(s)

Mike: Android for Exeda moved to Exeda Android