Hi, check out this video that demonstrates software making use of power savings capabilities on the i.MX28:  http://go.mentor.com/low-power

Hi All, With Ubuntu 14.04 LTS Trusty Tahr being up and running, I decided to post this guide to help anyone wanting to move over to it. I personally believe this is the best Ubuntu yet. This has come from my trial and errors, searching all over the web, and bits I picked up from here and there. You should have a fully functional android development environment once this is completed. NOTE-------- some of these packages may already be on your machine. Obviously, if you complete a step and you have one of these installed, the machine simply will not do anything. So...it will not hurt anything. Some of the packages are different from Ubuntu 12.04 and 13.04 (use these packages for Ubuntu 14.04 as many of the old ones have obsoleted - these are new replacements). The first thing I highly recommend installing is "Muon Package Manager" from the Ubuntu Software Center. I will be referring to it to install some packages. Next... Installing Python Open terminal (CTRL + ALT + T) Then execute the following commands in terminal one by one: $ sudo apt-get install build-essential gcc $ wget http://www.python.org/ftp/python/2.7.6/Python-2.7.6.tgz $ tar -xvzf Python-2.7.6.tgz $ cd Python-2.7.6 $ ./configure --prefix=/usr/local/python2.7 $ make $ sudo make install $ sudo ln -s /usr/local/python2.7/bin/python /usr/bin/python2.7 Now Python is configured Installing The JDK Add PPA to system $ sudo add-apt-repository ppa:webupd8team/java Download & install java $ sudo apt-get update && sudo apt-get install oracle-java6-installer CHECK $ java -version You should see something like: java version "1.6.0_45" Java(TM) SE Runtime Environment (build 1.6.0_45-b06) Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed mode) If not (I have had trouble with this i the past), go to: http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase6-419409.html (in your browser and manually download) You will have to login or setup an account with Oracle if you do not have one. Put the "jdk-6u45-linux-x64.bin" in the home directory. Then we need to run the binary and move it to a shared location by opening a terminal and typing: $ chmod +x jdk-6u45-linux-x64.bin $ sudo ./jdk-6u45-linux-x64.bin $ sudo mv jdk1.6.0_45 /usr/lib/jvm/ Now you have to install all binaries and give them highest priority, This will also overwrite the previous version of Java Binaries in your computer: $ sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.6.0_45/bin/java 1 $ sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.6.0_45/bin/javac 1 $ sudo update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/jdk1.6.0_45/bin/javaws 1 $ sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk1.6.0_45/bin/jar 1 $ sudo update-alternatives --install /usr/bin/javadoc javadoc /usr/lib/jvm/jdk1.6.0_45/bin/javadoc 1 Most of the time I get after these commands, basically the jdk is not there. Just run the binary and move it to a shared location using three commands above again and install and give them the highest priority again...its a pain, I know) Now check if JDK 1.6 is selected on this: $ sudo update-alternatives --config java $ sudo update-alternatives --config javac $ sudo update-alternatives --config javaws $ sudo update-alternatives --config jar $ sudo update-alternatives --config javadoc These five should all be selected. Now JDK is configured! To check if it is done Execute this is Terminal: $ java -version Output will be similar to this: java version "1.6.0_45" Java(TM) SE Runtime Environment (build 1.6.0_45-b06) Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed mode) IF NOT, YOU MAY NEED TO RUN AGAIN JDK is now configured. You can now delete or save somewhere else "jdk-6u45-linux-x64.bin"  that is in the home directory Installing GNU Make (use only make-3.81; this was designed for android) $ wget -o make.tar.gz http://ftp.gnu.org/gnu/make/make-3.81.tar.gz $ tar -xvzf make-3.81.tar.gz $ cd make-3.81 $ ./configure $ sudo make install Now GNU make is configured Installing Android SDK Download the SDK from: http://developer.android.com/sdk/index.html Accept Terms & download 64 bit. Extract in your home directory & rename extracted folder "adt". Now, execute these commands in terminal: $ cd ~/adt/sdk/tools/ $ ./android sdk At this point the SDK should come up and you will need to download at least all the tools and all the extras files (at least to 4.0, so select them and install them. When it finishes downloading & installing everything you have to run this command in ANOTHER TERMINAL: $ sudo gedit .bashrc And you need to add at the end of it your SDK paths these three lines (cop and paste them): #Android PATHS export PATH=$PATH:~/adt/sdk/tools export PATH=$PATH:~/adt/sdk/platform-tools Save and close the file, then close terminals. SDK is configured. Setup ADB & Fastboot These packages are needed to run many many android commands such as ADB and FASTBOOT (only 64-bit needs this). Using Muon Package Manager, get these three packages: lib32z1 lib32ncurses5 lib32bz2-1.0 Configuring USB Access Go to: snowdream/51-android · GitHub Download "51-Android.rules" Add these lines in alphabetical order: #Sabresd SUBSYSTEM=="usb", SYSFS{idVendor}=="18d1", MODE="0777" SUBSYSTEM=="usb|usb_device", ATTR{idVendor}=="18d1", MODE="0666", GROUP="plugdev" Open Terminal and type: $ gksudo nautilus In the pop up, Go back to hard drive & navigate to: /etc/udev/rules.d Copy & paste 51-android.rules Save and close the file, then close the window. Set the right permissions to this file: $ sudo chmod 644   /etc/udev/rules.d/51-android.rules $ sudo chown root. /etc/udev/rules.d/51-android.rules $ sudo service udev restart $ sudo killall adb ADB & Fastboot are configured Installing Required Packages Open Terminal Now execute this command: $ sudo apt-get install git-core gnupg flex bison gperf build-essential \ zip curl zlib1g-dev libc6-dev libncurses5-dev x11proto-core-dev \ libx11-dev libreadline6-dev libgl1-mesa-dev tofrodos python-markdown \ libxml2-utils xsltproc pngcrush gcc-multilib lib32z1 schedtool When that is finished, execute these commands: $ sudo apt-get install uuid uuid-dev $ sudo apt-get install zlib1g-dev liblz-dev $ sudo apt-get install liblzo2-2 liblzo2-dev $ sudo add-apt-repository ppa:git-core/ppa $ sudo apt-get update $ sudo apt-get install git-core curl $ sudo apt-get install u-boot-tools $ sudo apt-get install cbootimage $ sudo apt-get install dfu-util $ sudo apt-get install libterm-twiddle-perl Using Muon Package Manager install these packages (again some of these may already be installed): original-awk cl-awk dpkg-awk gawk mawk sed ssed abootimg Installing Repo Package Open terminal and type: $ mkdir ~/bin $ PATH=~/bin:$PATH $ curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo $ chmod a+x ~/bin/repo Now it is recommended to reboot your computer !!!! Extra Packages Needed For Ubuntu 14.04 Trusty Tar These must be installed to avoid an issue that comes up during the android build causing an error. Open Muon Package Manager and type "cpanm" and install: libmodule-cpafile-perl cpanminus pmuninstall Next, type in "libperl" and install if not installed: libperl-dev libperl-apireference-perl libperl5.18 libperl6-caller-perl libperlio-gzip-perl libperl4-corelibs-perl libperl5i-perl Next, type in "perl" and install if not installed: perl perl-base libxml-perl libfile-find-rule-perl-perl libprobe-perl-perl libmodern-perl-perl perl-modules Close Moun Package Manager Open a terminal and type: $ cpan App::cpanminus (answer "yes" when asked) $ sudo cpanm Switch Configure Git Open terminal and type: $ git config --global user.email "<your email address here>" $ git config --global user.name "<your user name here>" Git is configured. Istall Ccache Download "ccache 3.1.9 source code (tar.gz)" (or higher) from: http://ccache.samba.org/download.html Extract to the home directory. Open terminal & execute: $ ./configure $ make $ make install $ sudo gedit make install.bashrc Copy & paste the following: export USE_CCACHE=1 Save & close Open terminal & execute: $ ccache -M 75G I usually use 75 gigs. Ccache is now set to 75 gigs. Generating SSH Keys Check for SSH keys in the terminal: $ cd ~/.ssh $ ls Check the directory listing to see if you have a file named either id_rsa.pub or id_dsa.pub. If you don't have either of those files go on. Otherwise, you already have an existing key pair, and you can skip to "Add your SSH key to GitHub". Generate a new SSH key. To generate a new SSH key, enter the code below. We want the default settings so when asked to enter a file in which to save the key, just press enter.Type in the terminal: $ ssh-keygen -t rsa -C "<your email address here>" Will ask for pass phrase twice; just press enter twice. Add your SSH key to GitHub Run the following code to copy the key to your clipboard: $ sudo apt-get install xclip $ xclip -sel clip < ~/.ssh/id_rsa.pub Go to your github account (create one if you do not have one) & add your new public key. GitHub · Build software better, together. Test everything out. Type in the terminal: $ ssh -T git@github.com You may see this warning: The authenticity of host 'github.com (207.97.227.239)' can't be established. # RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48. # Are you sure you want to continue connecting (yes/no)? Type in "yes"; you should get this: Hi username! You've successfully authenticated, but GitHub does not # provide shell access. If the username is correct, you've successfully set up your SSH key. YOUR BUILD ENVIROMENT IS NOW SETUP

Android HW-assisted Address Sanitizer for Memory Overflow checking       Hardware-assisted AddressSanitizer (HWASan) is a memory error detection tool.     HWASan is based on the memory tagging approach, where a small random tag value is associated both with pointers and with ranges of memory addresses. For a memory access to be valid, the pointer and memory tags have to match.     HWASan uses a lot less RAM compared to ASan, which makes it suitable for whole system sanitization.   Here show an example: Use HWAsan for WiFi-HAL Memory Overflow issue hunting in Android-13.0.0_2.3.0_auto BSP.     Test environment:         SW:   Android-13.0.0_2.3.0_auto_car2, pre-built image.         HW:  88W9098 WiFi/BT EVK (PCIe) + i.MX8QXP EVK.       Run 88W9098 WiFi/BT on i.MX8QXP EVK, after ~2 hours, got memory leakage.       To locate root cause, enabled HWASan, re-build Android-13.0.0_2.3.0_auto BSP, run again, Got HWAddressSanitizer report: “heap-buffer-overflow”.          --Reason>  "Empty or null ScanResult list"  ->           --Then>      "Attempt to retrieve OsuProviders with invalid scanResult List" ->          --Result>    "heap-buffer-overflow"         HWASan help to locate root cause of Memory Overflow issue, on WiFi AP Scan code.         Attach file:            "Android_HW-assisted-Address-Sanitizer_for_memory-overflow_checking.pdf"