iMX6 TinyRex UltraPlus Android
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Android is a mobile operating system (OS) based on the Linux kernel and currently developed by Google.
This document describes installation procedure for binary Freescale Android 7.1 image. Supported peripherals on iMX6 TinyRex UltraPlus Module:
- HDMI output
- USB flash as external storage
- Video playback
- Audio playback
- WiFi
- Ethernet
Android 7.1
Install Prerequisites
sudo apt-get install uuid uuid-dev sudo apt-get install zlib1g-dev liblz-dev sudo apt-get install liblzo2-2 liblzo2-dev sudo apt-get install lzop sudo apt-get install git-core curl sudo apt-get install u-boot-tools sudo apt-get install mtd-utils sudo apt-get install android-tools-fsutils sudo apt-get install openjdk-8-jdk
Source code
Downloadable files needed during the building:
- Documentation for Android provided by NXP
- Source code with patches provided by NXP
- Voipac patches that add support for iMX6 TinyRex boards
Applying Voipac patches
tar xvzf android_N7.1.1_1.0.0_source_voipac.tar.gz -C ~/workdir/imx6/android/ cd ~/workdir/imx6/android/a711-rex/device/ tar xvzf ~/workdir/imx6/android/android_N7.1.1_1.0.0_source_voipac/device_vpac-proprietary_voipac.tar.gz -C . cd ~/workdir/imx6/android/a711-rex/device/fsl/ git apply ~/workdir/imx6/android/android_N7.1.1_1.0.0_source_voipac/device_fsl_voipac.patch cd ~/workdir/imx6/android/a711-rex/bootable/bootloader/uboot-imx git apply ~/workdir/imx6/android/android_N7.1.1_1.0.0_source_voipac/bootable_bootloader_uboot-imx_voipac.patch cd ~/workdir/imx6/android/a711-rex/kernel_imx git apply ~/workdir/imx6/android/android_N7.1.1_1.0.0_source_voipac/kernel_imx_voipac.patch cd ~/workdir/imx6/android/a711-rex/hardware/imx git apply ~/workdir/imx6/android/android_N7.1.1_1.0.0_source_voipac/hardware_imx_voipac.patch cd ~/workdir/imx6/android/a711-rex/hardware/broadcom/wlan git apply ~/workdir/imx6/android/android_N7.1.1_1.0.0_source_voipac/hardware_broadcom_wlan_voipac.patch
Build name options
- imx6tinyrex - iMX6 TinyRex Module Pro/Max/Max4G/Ultra
- imx6rex - iMX6 Rex Module Pro/Ultra
- imx6openrex - iMX6 OpenRex SBC Max/Max4G/Ultra
Build type options
- user - Production ready image, no debug
- userdebug - Provides image with root access and debug, similar to "user"
- eng - Development image with debug tools
Building commands
cd ~/workdir/imx6/android/a711-rex source build/envsetup.sh lunch imx6tinyrex-userdebug make 2>&1 | tee build-log-imx6tr.txt lunch imx6rex-userdebug make 2>&1 | tee build-log-imx6r.txt lunch imx6openrex-userdebug make 2>&1 | tee build-log-imx6or.txt
Compiled files are stored in the ouput directory:
cd ~/workdir/imx6/android/a711-rexout/ ls -la out/target/product/ drwxrwxr-x 6 user user 4096 7 24 07:19 . drwxrwxr-x 4 user user 4096 8 30 2017 .. drwxrwxr-x 11 user user 4096 8 22 21:34 imx6openrex drwxrwxr-x 11 user user 4096 7 28 20:19 imx6rex drwxrwxr-x 11 user user 4096 6 18 2017 imx6tinyrex drwxrwxr-x 11 user user 4096 5 1 2017 sabresd_6dq
Binary files
Official Voipac Android files can be found in downloads section.
Preparing SD card
mkdir -pv ~/workdir/imx6/android/bin/7_1/tinyrex cd ~/workdir/imx6/android/bin/7_1/tinyrex wget -r -nH -nd -np -R index.html* http://downloads.voipac.com/index.php?p=iMX6_TinyRex_Development_Kit/module/software/android/Android_7_1/binaries chmod a+x vpac-sdcard-partition.sh
SD card partition layout
This will be the final SD card partitioning layout at the end of installation procedure:
| Partition type/index | Name | Start offset | Size | File system | Content |
|---|---|---|---|---|---|
| N/A | BOOT Loader | 1 KB | 1 MB | N/A | bootloader |
| Primary 1 | Boot | 8 MB | 32 MB | boot.img format, kernel + ramdisk | boot.img |
| Primary 2 | Recovery | Follow Boot | 32 MB | boot.img format, kernel + ramdisk | recovery.img |
| Logic 5 (Extended 3) | SYSTEM | Follow Recovery | 1536 MB | EXT4. Mount as /system | system.img (Android system files under /system/ dir) |
| Logic 6 (Extended 3) | CACHE | Follow SYSTEM | 512 MB | EXT4. Mount as /cache | Android cache for image store of OTA |
| Logic 7 (Extended 3) | Device | Follow CACHE | 8 MB | EXT4. Mount as /vender | To Store MAC address files |
| Logic 8 (Extended 3) | Misc | Follow Device | 6 MB | N/A | For recovery store bootloader message, reserve |
| Logic 9 (Extended 3) | DATAFOOTER | Follow Misc | 2 MB | N/A | For crypto footer of DATA partition encryption bootloader message, reserve |
| Primary 4 | DATA | Follow Misc | Total - Other images | EXT4. Mount at /data | Application data storage for the system application and for internal media partition in /mnt/sdcard/ dir |
Creating SD card
Based on the location where the SD card has been mounted alter and use one of these commands:
sudo ./vpac-sdcard-partition.sh -f imx6tinyrex ultra /dev/mmcblkX
or
sudo ./vpac-sdcard-partition.sh -f imx6tinyrex ultra /dev/sdX
Setup
Bootloader
Android bootloader is stored in SD card and directly executed. Additional configurations are not required.
Setting HDMI video output
setenv bootargs "console=ttymxc0,115200 init=/init video=mxcfb0:dev=hdmi,if=RGB24,bpp=32 video=mxcfb1:off vmalloc=128M androidboot.console=ttymxc0 consoleblank=0 androidboot.hardware=freescale cma=320M" saveenv