Poor (or totally missing) support from Wandboard

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Poor (or totally missing) support from Wandboard

Postby raulina » Mon Aug 07, 2017 9:43 am

Dear all,

My name is Raul and I am a PhD student. I should say I am non-native english speaker, so I will make mistakes writing.

I bought a couple of wandboard Quad rev B1 back in 2014 or 2015 (I don't remember well) for my thesis mainly because it had 3 ports I2C, and I needed a couple of them, and because it had gigabit ethernet (I though it was a requisite, but it really wasn't, otherwise...). I barely had knowledge in embedded systems (I did a course in my bachelor, but nothing deeper than writing some codes and even a driver). I had had never compiled a kernel. Never had heard about device trees.

Maybe I was being naive, since I saw the SPI and the I2C ports in the expansion header in the datahseet, I think it wasn't crazy to think they were enabled. And then I found that they weren't.

- I needed to enable spidev, something I think it is not that unusual. I didn't find any clear guide in the forum or in the wiki.
- I needed to use 2 I2C ports, something I don't think either it is unusual (mostly considering that you sell it saying it has 3). In the datasheet you can clearly see 3 I2C ports in the expansion header, but why? One is not enabled, and if you enable it (I2C3) you will not be able to use ethernet. I didn't find any guide, tutorial, or whatever, explaining how to enable it, and if it was possible. In fact, I didn't find any warning when I bought it explaining that one of them was not usable if you wanted to use ethernet. I didn't find any warning about the problems on I2C1 because of the DDC.

I asked several questions in this forum and via email, and I only got answers for a silly question about a mechanical layout and when I posted a problem while enabling spidev, and you only complained on how I did it (the Cunningham's law). In fact, you gave me an incomplete answer (the pinctrl function code was missing), I am not sure if it was correct (why did I need to recompile the kernel if the modification suggested was for a device tree?), and I think it wasn't even a good practice (I remember I read somewhere that the modifications in the device tree should be done in imx6q-wandboard-revb1.dtsi and not in imx6qdl-wandboard.dtsi).

I was expecting much more support from Wandboard. Well, at least a bit of support. The wiki is almost empty. Nobody is answering mails. Some of the download links on the webpage are even broken. There is not an updated sdk in the website since 2014, neither a link to the Robert Nelson tutorial.

If my questions are so silly, or already answered, maybe it won't take you more than 5 minutes to copy a link to an other thread, or webpage, or manual where it is explained.
If the questions are complicate, maybe they deserve an answer or some documentation so other people can use it.

My experience has been totally frustrating with wandboard. I had many problems, that I learnt to solve not precisely thanks to you.

I am quite sure that I will avoid to work with wandboard in the future if I can.
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Joined: Thu May 05, 2016 3:23 pm

Re: Poor (or totally missing) support from Wandboard

Postby Tapani » Fri Aug 11, 2017 10:06 am

All I2C channels and SPI should be enabled by default, and do not need anything. Spidev is a story in itself (the spidev driver maintainers have started changing things, and having an attitude that dont use spidev but instead add your devices to your devicetree). I2C should NOT be dependent on ethernet at all. Maybe I did get Cunninghamed right here :-)

The software repositories are now at
https://github.com/wandboard-org/linux/ ... 5_1.1.0_ga
and the demo images
ftp://download.technexion.net/demo_soft ... oard-imx6/
too bad I am not able to post these on the webserver.

Regarding your bad experiences, I don't know what to say - I believe your story, and saying sorry is not going to make it any better.
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