Raspberry Pi C++

[FRC2501]

I am trying to get team 2168's vision tracking working on a Raspberry Pi 2, but I get this error:

./2168_Vision_Example: error while loading shared libraries: libstdc++.so.6.0.20: cannot open shared object file: No such file or directory

I have had little experience with code outside of writing it and hitting compile and send to rio, could someone help me get this working

[SoftwareBug2.0]

Do you see something named "libstdc++..." on your device? I don't have a Raspberry Pi to look at but it would be typically in something like /usr/lib. If you find it, see if the version number matches.

[FRC2501]

There isn't a libstdc++ in that folder, I'm assuming that means that I have to get that library?
If so how would I get that library?

[connor.worley]

You can statically link the library on the compiler end.

[FRC2501]

Originally Posted by connor.worley

You can statically link the library on the compiler end.

And how would I do this?

[connor.worley]

Originally Posted by FRC2501

And how would I do this?

That depends on your environment... how are you building code for the pi?

[FRC2501]

I am using Eclipse

[connor.worley]

Originally Posted by FRC2501

I am using Eclipse

Did you follow a guide? Please link it. The more detail you can provide the better.

[FRC2501]

I followed this guide:
https://github.com/Team2168/2168_Vision_Example

and to be honest I have no idea how the code I typed becomes the thing that runs on the roboRIO

[faust1706]

I would remove what installation you have of opencv, and start fresh.

Glancing at the code, or rather what's in the repo. If you haven't, try installing opencv separate from here: https://github.com/Itseez/opencv, or by simply typing sudo apt-get install opencdv-lib. You aren't losing anything by not using their altered opencv that can change one camera's internal settings. V4L2 does this for ANY camera, well, for the most part.

Once you think it is done, run the following program to ensure everything is working:

https://github.com/rr1706/sample

Then I would try to run their program if you desire.

So in your first post you say you are using the Pi, but on your latest one you say the roboRIO....

As for your last comment indirectly about compilers: grab a book about compilers and read it. The general cs courseload for any university should include a class on compilers.

[FRC2501]

Originally Posted by faust1706

I would remove what installation you have of opencv, and start fresh.

Glancing at the code, or rather what's in the repo. If you haven't, try installing opencv separate from here: https://github.com/Itseez/opencv, or by simply typing sudo apt-get install opencdv-lib. You aren't losing anything by not using their altered opencv that can change one camera's internal settings. V4L2 does this for ANY camera, well, for the most part.

Once you think it is done, run the following program to ensure everything is working:

https://github.com/rr1706/sample

Then I would try to run their program if you desire.

So in your first post you say you are using the Pi, but on your latest one you say the roboRIO....

As for your last comment indirectly about compilers: grab a book about compilers and read it. The general cs courseload for any university should include a class on compilers.

Sorry about confusing you, I am running this on a Pi, but I have the most experience with the rios, I reinstall the OpenCV, but it seems to be another C++ library not the OpenCV one that it needs.

[dubiousSwain]

This is a little bit off topic, but I'm trying to get rudimentary tracking (nothing crazy like NN or 900's code) with the Raspberry Pi and Python, im just having trouble figuring out how to configure it to automatically run on the robot without having to be interfaced with

1. What distros can I use/should be using?
2. How do I run code without logging in?

After I figure out the answer to question 1, I can use my limited knowledge of GNU/Linux to disable GNOME/X, install OpenCV, and autorun my scripts, but those two questions are my current hangups. Any and all advice would be greatly appreciated.

[faust1706]

Originally Posted by dubiousSwain

1. What distros can I use/should be using?
2. How do I run code without logging in?
.

1. I would recommend a linux distro as they are generally the lightest (and FREE!). A common OS is ubuntu.

2. You can set up any program (or script) to run upon boot in a linux. What 1706 has done for many years now is simply don't require a login and then set up the program to run on boot. This way, as soon as the board gets power (and maybe a press of the power button to start the booting process of the board), the program will start automatically.

[dubiousSwain]

Originally Posted by faust1706

1. I would recommend a linux distro as they are generally the lightest (and FREE!). A common OS is ubuntu.

2. You can set up any program (or script) to run upon boot in a linux. What 1706 has done for many years now is simply don't require a login and then set up the program to run on boot. This way, as soon as the board gets power (and maybe a press of the power button to start the booting process of the board), the program will start automatically.

Thank you. I have Raspbian on my RPi right now and the time it takes to log in is atrocious. Is it necessary to disable X if I'm not connected to a display? I want to maximize the resources that my code has available. Also, how does one make Ubuntu not require a login?

[faust1706]

Originally Posted by dubiousSwain

Is it necessary to disable X if I'm not connected to a display?

Um...you could try only showing terminal. I'm not sure how much that would speed up boot time and I do not recommend unless you are a hardened linux user.