How to Build Android 4.4 for Rockchip RK3288 Devices (Tronsmart Orion R28)

After blowing up my ATX power supply, and learning such things as “FULL” power supplies do exists, I finally managed to build Android for Tronsmart Orion R28 using the provided SDK. I haven’t tried to load it on the device yet, but the build could complete successfully after following the steps below in Ubuntu 14.04. The SDK is probably not specific to one device, so it might just also work on other RK3288 TV boxes and tablets.

First download Android 4.4 SDK for RK3288, or use the one in the micro SD card provided with the Beta version of R28 Pro and Meta.

Install some dependencies:

Extract the SDK:

And build the kernel first:

1. Enter the kernel directory:
   
   cd RK3288_R-BOX_ANDROID4.4.2-SDK_V1.0.0/kernel/

   1	cd RK3288_R-BOX_ANDROID4.4.2-SDK_V1.0.0/kernel/

2. Change arch/arm/boot/dts/Makefile to use RK3288 device tree file instead of an RK3188 (may not be needed, but the build failed for me without that change…):
   
   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3288-box.dtb

   1	dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3288-box.dtb

   
   It’s also quite possible you need to extract the device tree file from your firmware or device.
3. Building the kernel and resources (device tree + logo) images:
   
   make ARCH=arm rockchip_box_defconfig make rk3288-box.img -j8 cd..

   1 2 3

   make ARCH=arm rockchip_box_defconfig make rk3288-box.img -j8 cd..

4. Done
   It will fail with:

   drivers/usb/dwc_otg_310/dwc_otg_hcd.c: In function ‘dwc_otg_hcd_rem_wakeup_cb’:
   drivers/usb/dwc_otg_310/dwc_otg_hcd.c:446:31: error: inlining failed in call to always_inline ‘dwc_otg_hcd_to_hcd’: function body not available

5. Edit the culprit file, remove the inline directive, and continue the build:
   
   <del>make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-</del>

   1	<del>make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-</del>

6. Similar errors will occur one or twice more, so repeat step 5 as needed….
7. Create kernel.img (not sure the command line is correct)
   
   <del>./mkkrnlimg arch/arm/boot/Image kernel.img rk3288-box cd..</del>

   1 2	<del>./mkkrnlimg arch/arm/boot/Image kernel.img rk3288-box cd..</del>

Before building Android, you need to make sure you use the right version of Java. I recently build AOSP for ARMv8 which requires OpenJDK 1.7 in Ubuntu, but this version requires Oracle 1.6 SE.  At first I used JDK 6u45 (1.6.045), but I got some errors:

In file included from external/chromium_org/content/common/android/hash_set.cc:5:0:
out/target/product/rk3288/obj/GYP/shared_intermediates/content/jni/HashSet_jni.h:10:26: error: extra tokens at end of #ifndef directive [-Werror]

Based on a thread on XDA developer forums, I installed Java 1.6.0.27 instead, which you can download here:

Now add the new Java version to the “alternatives”:

and make sure Java 1.6.0.27 is used by default:

I’m not sure all six tools need to be configured, but it probably does no hurt to do so.

Finally, you just need to run a script to build Android:

Be patient, and it should finish with something like:

Creating filesystem with parameters:
Size: 1073741824
Block size: 4096
Blocks per group: 32768
Inodes per group: 8192
Inode size: 256
Journal blocks: 4096
Label:
Blocks: 262144
Block groups: 8
Reserved block group size: 63
Created filesystem with 1792/65536 inodes and 149182/262144 blocks
+ '[' 0 -ne 0 ']'
Install system fs image: out/target/product/rk3288/system.img
out/target/product/rk3288/system.img+out/target/product/rk3288/obj/PACKAGING/recovery_patch_intermediates/recovery_from_boot.p maxsize=1096212480 blocksize=135168 total=598297319 reserve=11083776
TARGET_PRODUCT=rk3288
TARGET_HARDWARE=rk30board
system filesysystem is ext4
make ota images...
create boot.img with kernel... done.
create recovery.img with kernel... done.
create misc.img.... done.
create system.img... done.
*******************************
3288_4.4 sdk do finish
*******************************

All relevant files can be found in rockdev/Image-rk3288 directory:

Next step is to flash it to the device, and see if it can boot.

Jean-Luc Aufranc (CNXSoft)

Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.

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