Dear Mike,

we port OpenADK for the TI AM33xx which runs on the phytec WEGA board (http://www.phytec.de/produkt/single-board-computer/phyboard-wega/). They also provide a board with the rock chip. We uses the yocto template to get OpenADK running on it. You can have a look in the files "target/arm/systems/phytec-wega" and "target/arm/kernel/phytec-wega" and see how easy the configuration is to get it basically running. Also there is a hook in for the wega board in the installation script and you have to adapt the target/arm/Makefile.

I relay recommend to use an embedded system instead of a full blown ubuntu. We had very bad experience with that in the past. So my recommendation "do not even think about ship such a system to a customer!!!". This had cost us a lot of money and was our start with using OpenADK.

Please have also a look on the build in update mechanism of OpenADK. We implement it for a Kontron board and for testing on the RaspberryPI. It makes the update secure and easy. An update is made in a passive partition. After a reboot with the new Firmware (from the passive partition) it gets the active partition. We build in some sanity checks if they are passed the system will boot with the new partition.#

We also build an OpenADK for the "Deutsche Bahn" for the displays of the rail stations. There first approach was to use an arch Linux. So they made the same mistake we did in the past. Fortunately the did not install the systems on the tracks yet, so we were able to install OpenADK. Anyway the main thing is a solid updater so you can fix issues on the customer site easily.

Best regards

Martin

we port OpenADK on an Kontron Board with EFI Bios wich was a bit pain in the as but at the end we managed it.

Am 28.05.2018 um 09:12 schrieb Mike Thompson:

I'm very interested in determining the effort to create a port of OpenADK to the ASUS Tinker Board.  Does anyone have experience with OpenADK on this or other Rockchip based hardware to use as a template to get started from?

Let me explain a little where I'm coming from with this.

Two years ago as a consultant I did a port of OpenADK to support the Google "Project Blocks" tangible programming system for children.  See: https://projectbloks.withgoogle.com/ 

The "Brain Block" in the Project Block system was powered by the recently released Raspberry Pi Zero and I chose OpenADK was the OS.  I'm the original creator of Raspbian, but with a bit of irony, I had to make the decision that Raspbian was not the right fit for this project.  The fact that OpenADK with stripped down kernel could boot almost instantly and the rootfs being read-only were extremely compelling features for an embedded Linux system that had to be VERY robust in the hands of children.  At the time I was under heavy non-disclosure agreements with Google regarding my work with the project so I couldn't say anything about it at the time, but I found OpenADK to be very pleasant to work with.  I don't know the current status of things since finishing my work in 2016, but I hope that they are continuing to use OpenADK with their research in tangible computing.

Now two years later I'm an employee at a 3D printing start-up company where we have the need to create some robust Linux based embedded systems for robot control using Rockchip based ARM systems -- the ASUS Tinker Board being a fairly computationally powerful system to start with.  I could use a stripped down Ubuntu system (kids won't be anywhere near these robots), but I think OpenADK or Yocto would be a better embedded solution where the system just needs to work with minimal management that a heavy Debian or Ubuntu system might entail.

If a port doesn't exist, I'm assuming I would have to get a good understanding of the Rockchip boot process to create the first stage and second stage bootloader (probably Uboot), a custom kernel for this hardware, the image requirements for an SDK card and figure out how to put it all together within OpenADK.  I think I have the skills to do this, but I'm a little weary of the time it might take to figure it all out.  Also, being a start-up, my budget is rather slim to pull in outside help.

I wanted to get some guidance from the folks on this mailing list to see what I might expect with regards to such a porting effort for OpenADK. Sorry for the long email on this question.

Thanks,

Mike Thompson

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