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  VS Arduino › Visual Micro › Installation & Troubleshooting › External symbol not found - modified AVR core
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Normal Topic External symbol not found - modified AVR core (Read 6547 times)
Etienne Martin
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External symbol not found - modified AVR core
Apr 10th, 2014 at 11:14am
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Hello,

I have a sketch for a Leonardo using modified USBAPI.h and HID.cpp core AVR libraries on 1.5.x to enable the HID game controller descriptor (this makes the Leonardo look to Windows as a game controller for DirectX input).� By default, the core files only enable the keyboard and mouse HID pieces.� The mod is directly applied to the installation folder where the Arduino IDE is installed, in my case 

C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino

The sketch compiles correctly in the Arduino IDE and runs correctly on the Leonardo.

The first problem I'm running into is that the one of my user libraries isn't found (getting reference errors).   

The second issue even when I remove the library references to get past that issue, the modified AVR core library objects for the HID controller defined in hid.cpp and usbapi.h aren't found either.

I don't know how to tell Visual Micro to use the libraries - I'm certain that as a complete noob with this environment, i'm misisng a configuration.

I have setup the IDE files and user files correctly in the environment as far as I can tell.

Any hints as to where I need to look?

Thanks!

E.

  
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Tim@Visual Micro
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Re: External symbol not found - modified AVR core
Reply #1 - Apr 10th, 2014 at 12:57pm
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Hello Etienne,

Sorry you are having problems. I think we can fix them quite quickly but need some help.

Would you please zip and email your custom core, your libraries folder and your sketch to info [at] visualmicro.com

In the meantime you "might" find a solution for the library include by putting the name of the library into the #include such as:-

#include <SPI/SPI.h>

Please note the "library name/" in the example above.

There have been significant changes to core and libraries in Arduino versions this year. 

Currently Arduino have approx. 3 different systems between "1.0", "1.5.0-1.5.5", "1.5.6+". Visual Micro should automatically switch between these different formats but for testing I need to replicate your exact config so please confirm exactly which version of Arduino 1.5 you are using.

Thanks
  
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Etienne Martin
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Re: External symbol not found - modified AVR core
Reply #2 - Apr 10th, 2014 at 4:31pm
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Thanks for the reply, I'm sending the requested archive with my test sketch, the modifications to the AVR core files and the libraries. 

The version of the IDE I'm using is 1.5.6 r2 because I need Windows 8.1 signed drivers.

Running Visual Micro in Visual Studio 2013 Ultimate.

OS: Windows 8.1 professional x64.

Board: Arduino Leonardo.

Regards,

E.
  
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Tim@Visual Micro
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Re: External symbol not found - modified AVR core
Reply #3 - Apr 10th, 2014 at 5:52pm
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Hi E,

Thanks for sending what I asked for and also for the link back to this post.

Your project, modified core and libs compile fine for me. Here is the output from the build

Code
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Compiling 'gamecontroller' for 'Arduino Leonardo'
Binary sketch size: 7,734 bytes (used 27% of a 28,672 byte maximum) (3.14 secs)
Minimum Memory Usage: 422 bytes (16% of a 2560 byte maximum)


Solution (s)

1) If you compiled your project with Visual Micro prior to updating the core then the compiler might be using a cached non-modified core. Vm caches based on Arduino Ide version number which has not changed, so I suggest clicking menu "Build>Clean Solution" then try compile again.

2) If your "User" libraries can not be found then please confirm what path you have entered into the optional sketchBook folder on the Ide locations dialog? If this field is empty it should use the same location that Arduino uses which is normally mydocument/arduino/libraries. The defaults should all work so I am keen to hear that this is not the problem.

Tim
  
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Etienne Martin
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Re: External symbol not found - modified AVR core
Reply #4 - Apr 11th, 2014 at 12:01pm
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Tim,

still not luck with the above steps.  I had the sketch path set in the options, which I have cleared.  This helped as the user libraries were found.  However, the core still not happening after a clean solution.

I'm sending the log output with verbose turned on (didn't fit in a post) in the hope it will shed some light.

Cheers,


E.
  
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Tim@Visual Micro
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Re: External symbol not found - modified AVR core
Reply #5 - Apr 11th, 2014 at 12:07pm
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Hi,

I tried it with 1.5.5 and it worked okay so I'll try with 1.5.6 over the weekend. 

Thanks
  
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Re: External symbol not found - modified AVR core
Reply #6 - Apr 12th, 2014 at 2:37pm
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Hi E,

I've looked at this again and it's a simple system no different to normal Arduino. Checking with google I see that this error happens if the .h was not replaced in the core. You have said that the Arduino Ide builds okay in "c:\ program files(x86)/arduino" so this must be a compiler cache issue.

Please click "build>clean solution", then compile and send the full output. The output in your email did not show a build after a clean. Normally the clean is not required but is required for a full compiler verbose output

The clean should delete or empty this folder: C:\Users\etienne\AppData\Local\VMicro\Arduino\Builds\gamecontroller 

If it does not delete or empty the folder, then please let me know and delete it manually using windows explorer.

Thanks
  
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