[ML-General] mentoring Qt and sensors

Wed Oct 28 20:38:01 CDT 2015

David,
You probably don't need this link for installing Debian Jessie on RPi2,
but I'm including it for documentation for others.
https://wiki.debian.org/RaspberryPi2

On Wed, Oct 28, 2015 at 8:34 PM, Susan Spencer <susan.spencer at gmail.com>
wrote:

> No I haven't heard from Bill, but this thread is already off-list...
> You can forward this to the ML General list if you want.
>
> Debian Jessie has base level GUI support, requires additional packages:
> https://packages.debian.org/jessie/x11/xorg
>
> On Wed, Oct 28, 2015 at 7:53 PM, david <ainut at knology.net> wrote:
>
>> Wonder if Jessie has a gui by default?
>>
>>
>>
>> On 10/28/2015 07:31 PM, Susan Spencer wrote:
>>
>> Hey I heard back from our embedded expert.
>> He says the Debian Wheezy server build doesn't have *any* xwindows
>> support installed. There are many, many libs that should be installed prior
>> to installing lightdm.
>>
>> Our best approach is to get the wheezy server build and install the
>> xwindowing libs (including lightdm). Then of course install the stratux
>> files and Qt, then put on the SD card.
>>
>>
>>
>>
>> On Tue, Oct 27, 2015 at 7:21 PM, Susan Spencer <susan.spencer at gmail.com>
>> wrote:
>>
>>> Okay, in the meantime I'll try installing the image to an SD card and
>>> installing lightdm.
>>>
>>> On Tue, Oct 27, 2015 at 7:12 PM, david < <ainut at knology.net>
>>> ainut at knology.net> wrote:
>>>
>>>> Please do.
>>>>
>>>>
>>>>
>>>>
>>>> On 10/27/2015 07:11 PM, Susan Spencer wrote:
>>>>
>>>> lightdm and Qt aren't installing on the stratux RPi2 image?
>>>> I have a suggestion.
>>>>
>>>> There's a local guy who is a
>>>> linux-kernel-engineer/linux-embedded-engineer who is highly enthusiastic
>>>> about ham-radio/weather/GPS. He may be able to see the extra magic required
>>>> to install a windowing environment.
>>>>
>>>> He's in San Francisco until Friday, but he usually answers email within
>>>> 24 hours.
>>>> Do you mind if I ping him about your project?
>>>> We could meet on Saturday to test what's happening with lightdm, etc.
>>>>
>>>>
>>>>
>>>>
>>>> On Tue, Oct 27, 2015 at 5:43 PM, david < <ainut at knology.net>
>>>> ainut at knology.net> wrote:
>>>>
>>>>> Also, the stratux authors are doing great things.  They release a full
>>>>> image that one can write to the SD card that goes into the RPi2 and
>>>>> everything is configured, with even the source code in the image that fits
>>>>> that particular distribution.
>>>>> However, they seem to have chosen to not include any windowing
>>>>> environment, only text terminals.  "Startx" is non-existent.  When I try to
>>>>> install lightdm, it fails miserably.  So, running Qt on the RPi2 is a
>>>>> non-starter.  Btw, the environment is Debian Wheezy.  The ADS-B software
>>>>> starts up when the image boots, so it's really easy for people who don't
>>>>> know what an operating system is.  (However, they don't teach people how
>>>>> and why to do an orderly shutdown so I suspect the file system will become
>>>>> corrupt over time, especially since they have several log files going all
>>>>> the time.)
>>>>>
>>>>> David
>>>>>
>>>>>
>>>>> On 10/27/2015 05:16 PM, Susan Spencer wrote:
>>>>>
>>>>> Yep, pulling files at compile time seems scary *and* interesting.
>>>>> Our weather sensor monitor recently failed, this would be a good
>>>>> replacement.
>>>>>
>>>>> That's a rather unfortunate Software Center problem. Is it broken in
>>>>> your virtual Linux or desktop Linux?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Tue, Oct 27, 2015 at 4:54 PM, david < <ainut at knology.net>
>>>>> ainut at knology.net> wrote:
>>>>>
>>>>>> Welcome aboard, Susan!
>>>>>> I've done some Qt projects but followed recipes from books.  That
>>>>>> does me no good at the moment where I'm trying to figure out:
>>>>>> 1. cross compile (or even native compile if I can find Qt 5.5 for
>>>>>> RPi2, with graphics.)
>>>>>> 2. where to find the toolsets for Beaglebone Black (BBB) or RPi2.
>>>>>> Focusing on the Pi at the moment.
>>>>>> 3. how to combine multiple compilers in one project (yeah, the
>>>>>> original author did that!)  Several modules are in the "go" language, which
>>>>>> I had never heard of.  The other modules seem to be regular c/c++.
>>>>>> However, during the build process, several files are pulled from git DURING
>>>>>> compile time!  That blows my mind and is brand new to me.
>>>>>> 4. and so on.
>>>>>>
>>>>>> Their code (which is working mostly) is what I'm trying to fork; and
>>>>>> change their IMU (9 DOF) sensor to a different one.  They like the MPU6050
>>>>>> and while I have one, it appears to not be as stable or as accurate as the
>>>>>> BNO055.  Additionally, they use a GPS (built onto their IMU board using
>>>>>> I2C) and I would like to use a different (higher resolution) GPS that uses
>>>>>> serial.
>>>>>> This is the "stratux" project, hosted on reddit (grrrrrr) and
>>>>>> github.  They are cool with me using different sensors.  If you're
>>>>>> interested, search on "stratux" and "ads-b."
>>>>>>
>>>>>> My development desktop is running Ubuntu but I'm having trouble
>>>>>> updating some things as apparently the package manager is broken and I
>>>>>> can't seem to fix it.  Most "apt-get" commands work ok but I'd rather stay
>>>>>> in a windowing environment for routine stuff like that.
>>>>>>
>>>>>> Oh, for the days of SGI IRIX Development System...
>>>>>>
>>>>>> David
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 10/27/2015 04:38 PM, Susan Spencer wrote:
>>>>>>
>>>>>> Hi David,
>>>>>>
>>>>>> Can I join your Qt sessions? I can split the cost with you and/or
>>>>>> help you *barter*.
>>>>>> I know Qt enough to build one particular C++ project, I want to know
>>>>>> more about it.
>>>>>> I have Linux 64bit, Ubuntu 14.04, with Qt5.5, some Raspberry Pi's and
>>>>>> other bits and kits lying about if we want to use them to build a project.
>>>>>> I have some experience with git.
>>>>>>
>>>>>> - Susan
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Tue, Oct 27, 2015 at 4:25 PM, david < <ainut at knology.net>
>>>>>> ainut at knology.net> wrote:
>>>>>>
>>>>>>> Anyone with to mentor me regarding Qt setup and projects?  I seem to
>>>>>>> be lost in a maze of twisty passages all alike.
>>>>>>> Environments available: Winblows 7 (and virtual Linux under it),
>>>>>>> desktop Linux of Fedora, Ubuntu, and Debian, and targets of:
>>>>>>> beaglebone black and very recently Raspberry Pi 2.  Am willing to
>>>>>>> negotiate cost or offer help on your projects or ???
>>>>>>>
>>>>>>> Also, git is throwing me now.  <sigh>
>>>>>>>
>>>>>>> It's BARTER TIME!
>>>>>>> (Cash is acceptable too.)
>>>>>>>
>>>>>>> David Merchant
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> General mailing list - <General at lists.makerslocal.org>
>>>>>>> General at lists.makerslocal.org
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>>>>>>> https://256.makerslocal.org/
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>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>
>>
>
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