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single compilation problem
April 8, 2015
5:04 pm
Forum Posts: 4
Member Since:
April 2, 2015
sp_UserOfflineSmall Offline

Hi all,

I've got a Mega2560 with a Multi-function shield, which contains amoung others a buzzer that is controlled by Pin D3 via a small transistor. I tested your example 'Tone - Play' successfully. But due to the inversion by the transistor, the buzzer continues beeping when the code is finished (which is quite disturbing!).

I added 'Tone' and ACCL.lvlib: Digital with True after the for loop in order to stop that beep. Saved the code, than compiled & downloaded it. Got an error, which I sent. Afterwards I just compiled the very same code OK and again compiled & downloaded it OK.

Now the code runs as expected.

But why did I got that error, which went away by 'just' compiling? Can I trust the code?

April 8, 2015
5:25 pm
Forum Posts: 304
Member Since:
March 12, 2015
sp_UserOfflineSmall Offline

Thanks for sending your error report.  The error you received seems to be within the Arduino toolchain.

c:/program files (x86)/arduino/hardware/tools/avr/bin/../lib/gcc/avr/4.8.1/../../../../avr/lib/avr6/crtm2560.o:(.init9+0x0): undefined reference to `main'

 We have never seen this before but there are several Arduino posts related to something like this.  What version of the Arduino IDE are you using?  Yes, I would expect you can "trust" the code.  This was a simple linking issue.

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