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Build custom ROM for Allwinner A10 based Android Tablets 2

PART II

If you have downloaded the kernel and Android OSP files you can dive right in to compiling the kernel images and building the actual firmware. The first part can be found here
Since we will be compiling the kernel images on an x86 machine we will need a cross compiler to build images that are compatible with the ARM cpu architecture. Fortunately Ubuntu comes pre-loaded with such cross compiler.

Step 1
Go to lichee/scripts and you should find a file named build_sun4i_crane.sh, open the file and change
export ARCH=arm
change this line
export CROSS_COMPILE=arm-none-linux-gnueabi-
to
export CROSS_COMPILE=/home/arpandeb/android/prebuilt/linux-x86/toolchain/arm-eabi-4.4.3/bin/arm-eabi-
Please note that â€œ/home/arpandebâ€ is my home directory, on your machine it will be different.
Save the file.

Step 2
cd ~/a10/lichee ./build.sh -p sun4i_crane
It will take some time and the kernel will be compiled along with the associated drivers and modules. After the process is complete, you can view them by going to

cd ~/a10/lichee/output ls -l
YouÂ should see two files bImage , zImage and one directory named â€œlibâ€. The lib directory contains all the drivers and modules.

Step 3
Next step is to build the Android AOSP system, it will take few hours. To build Android

cd ~/android source build/envsetup.sh lunch

A simple text menu like the one showed above gets displayed. Select Option 6. For our target tablets like XTAB A10, VeeDee D10/Ployer MOMO9, iBerry BT07i, Olive VT300 or any other Allwinner A10 based tablet we have to create the board files. Now VeeDee D10, Plopyer Momo9, Olive VT300 are build on the same internal hardware and casing, so a single set of board files should suffice.
After you have selected the option, to compile Android type
make
Now you will see copious amount of texts scrolling by on your screen, it will take any where from 2 to 4 hours for the entire operation to get completed.

Step 4
Once it is over, download this filehttp://www.mediafire.com/?ddru5mbcpurwye3 ,mkfs.sh (this will create the actual firmware image). Overwrite the existing mkfs.sh. Now open the mkfs.sh file and change the following variables according to your system

export ANDROID_BUILD_TOP=/home/arpandeb/android export OUT=/home/arpandeb/android/a10out LINUXBSP_SRC=$ANDROID_ROOT/lichee
I have moved the â€œlicheeâ€ directory to be under /android to keep all things in one place, you can do that too. In the mkfs.sh, following variables refer to the location of the compiled drivers and modules, if you have moved them around, change it accordingly

DRV_DIR=$LINUXBSP_SRC/output/lib/modules/2.6.36-android LINUX_IMG=$LINUXBSP_SRC/output
If you have edited the mkfs.sh file, save it and close it and change the permission to 755 if necessary. Now

sudo ./mkfs.sh
It will show some out put and after few minutes your firmware is ready. You will find the .img files in the directory you defined in OUT, in my case it was in /home/arpandeb/android/aout. Once you go inside that directory you should see three files

root.img system.img recovery.img
Now create a directory under your home directory and name it firmware, for example
/home/arpandeb/firmware
Now copy the root.ing, system.img, recover.img and bImage (from android/lichee/output). Transfer the directory to a thumbdrive and take it to a PC running Windows for the next phase.

Sumber :http://arpandeb.com/03/2012/android-how-to-guides/how-to-build-custom-rom-for-allwinner-a10-based-android-tablets-part-ii.html

Build custom ROM for Allwinner A10 based Android Tablets 1

PART I

For the sake of this tutorial I will assume that you know your way around Linux but is starting fromk scratch on Android.
Building ROMs and kernels for your tablets or phones can be exhilarating when it works and depressing when it does not. Some time it simply will not work due to an unknown reason , no matter what you throw at it or how many hours you sink, if that happens do not get disheartened , just close it and move on to another ROM or Kernel build or search and wait till more information is available about the target device. This will help to keep your creative juices flowing, avoid disturbing thoughts of inflicting self injury
To build an Android kernel or ROM you will need a decently powered machine so that old pentium iv will not work. You will need a machine with
1. A 64bit dual core cpu (like Core2Duo etc(
2. 2 GB or more of RAM
3. Free hard disk space of 80 GB atleast, if you can invest in a separate HDD.
4. A decent internet connection of 512 kbps or more.
Once you get the hardware ready. Download Ubuntu 64bit 10.04 LTS. In this case the latest is not necessarily the greatest. Android kernels are almost always compiled on Ubuntu 9.xx or Ubuntu 10.04. So stick to it and you will avoid problems later on.
Once you have downloaded Ubuntu 10.04, burn in on to a CD and install it on the machine you prepared for kernel building purpose. If you are using the same machine, you can dual boot it.
After you have installed Ubuntu, configure your network connection and connect to the internet. If you are using wifi to access internet, do not worry, most wifi adapters like Dlink, Netgear are detected automatically on Ubuntu and gets configured without you having to lift a finger.
Now that Ubuntu is installed and working and you are connected to the Internet, the fun begins. Open the terminal and start typing

Step 1
We will need JDK 6 for our purpose and it has been removed from the Ubuntu repositories, so need to do install it from a PPA. Type the following

sudo add-apt-repository ppa:ferramroberto/java sudo apt-get update sudo apt-get install sun-java6-jdk sudo apt-get install sun-java6-jdk sun-java6-jre sun-java6-plugin sun-java6-fonts
After all this is complete

java -version
The output should look the one shown below
Now with Java out of the way, let us download the essential tools for compiling a kernel

Step 2
sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev libc6-dev lib32ncurses5-dev ia32-libs x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown libxml2-utils xsltproc
The time taken will depend upon the speed of your internet connection.

Step 3
mkdir ~/bin PATH =~/bin:$PATH
Now we will have to get the “repo” client, this is what downloads the Android kernel sources to your computer. Think of it as a download manager for “git” repositories.

curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo   ~/bin/repo chmod a+x ~/bin/repo

Step 4
We have to download the Allwinner kernel sources.

mkdir ~/a10 cd ~/a10 git clone https://github.com/allwinner/linux-2.6.36  " onclick="javascript:_gaq.push(['_trackEvent','outbound-article','http://github.com  ']);">https://github.com/allwinner/linux-2.6.36
lichee Once the download is complete, look inside the “lichee” directory and it should look like this

Step 5
Now we need to get the Android AOSP. You can download all the versions of Android or you can download a specific version. Since the Allwinner kernel is based on 2.3, for this purpose we will only download 2.3.7. This is the latest version of the Gingerbread. In the future when Allwinner releases source for ICS 4.X we can download that too.
Note this download can take many hours, so prepare to start it and leave your machine switched on and connected to the internet. I do this at night and leave the machine to download and check it in the morning.

mkdir android cd android repo init -u https://android.googlesource.com/platform/manifest   -b android-2.3.7_r1 repo sync
After this command completes, list all the files and your directory should look like this. If for any reason the download doesnot complete or hangs, close the terminal, open a new terminal and
type

repo sync
It will start downloading where it last stoppped, than wait for it to complete.
If repo completed successfully move to the next step.

Step 6
cd ~/android/system/core git pull git://github.com/arpandeb/allwinner_a10_core.git

Step 7
Now we need to download the board files for the tablets. I have found the board files for Ainol Novo 7 and the general crane motherboards(essential). In a later tutorial I will show you how to build board files for your specific tablet, which is what I am doing for the VeeDee D10/Ployer MOMO9, XTAB A10, iBerry BT07i.

cd ~/android/device git pull git://github.com/arpandeb/allwinner_board_files.git softwinner
Now that we have downloaded all that we need, next we have to configure the cross compilers to build kernels for the ARM architecture.
More to come…

Source :

http://arpandeb.com/03/2012/tech-guides/how-to-build-custom-rom-for-allwinner-a10-based-android-tablets-a-tutorial-and-guide.html

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