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Author Topic: I'm having difficulty loading the blinking template to my Arduino uno  (Read 1605 times)
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This is what my original arduino displays in the mac diagnostics.


* Screen Shot 2012-09-02 at 12.01.39 AM.png (147.14 KB, 921x887 - viewed 19 times.)
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Looks like the ATmega8u2 (or 16u2) on the other Uno stopped enumerating.
So what does that mean I should do?

You can refresh the firmware on the 8u2.  Google for "Arduino DFU".  DFU stands for Direct Firmware Update or something like that.  That's how you write to the 8u2 flash memory via USB.
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When I try to reset the 16u2 on the arduino R3 it sends a messages from the dfu-programmer that says device not present.
I even tried reinstalling the dfu-programmer with some patch to help it recognize the uno r3. As described on this post.
http://arduino.cc/forum/index.php?topic=88022.0
But nothing seems to work.
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Seems like the Arduino uno is cursed issues. Is there different model I should look into buying or maybe move to a different micro controller?
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Seems like the Arduino uno is cursed issues. Is there different model I should look into buying or maybe move to a different micro controller?

I have like ten arduinos working since 2-3 year ago, none shown any problem ever (besides a duemillanove I burned with too much voltage, but then fixed replacing the ftdi), my previous experience was only with PIC, and that one was a bad experience (haha so I will never trust microchip again, even when they sell that chipkit something compatible with arduino).

You say "dfu-programmer that says device not present.", so (I don't know how devices show up on mac) your arduino is not in dfu mode yet.
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I've been trying to figure out DFU mode on the arduino. Neither of the articles I found on it really seem to be up to date with the r3. because neither of these boards resemble the uno r3
http://arduino.cc/en/Hacking/DFUProgramming8U2
http://ossnotebook.blogspot.com/2011/06/dfu-mode-arduino-uno-without-soldering.html
http://arduino.cc/forum/index.php?action=printpage;topic=52447.0
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I appreciate everyone's help here. Thank you all so much. I'm really excited about getting my project off the ground. I've gone ahead and exchanged my arduino R3 for a new one.
I'm a bit nervous though about compiling and uploading from the mac with Mountain Lion. It's bricked one board that was working fine before and a second board that I picked up at the store afterwards.
Does anyone have any experience with successfully deploying from Arduino 1.0.1 on Macintosh Mountain Lion? I would love to hear about it.
I'm considering getting an ethernet shield to deploy with since I seem to be having difficulty with the USB method.
I'm also planning to take this class to see if the teacher can give me some guidance.
http://www.3rdward.com/3rdwardclasses/physical-computing-with-arduino.html
If anyone can point me in a direction that might help me move further along with this I would greatly appreciate it.
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Does anyone have any experience with successfully deploying from Arduino 1.0.1 on Macintosh Mountain Lion? I would love to hear about it.
I've had no problems.

I'm considering getting an ethernet shield to deploy with since I seem to be having difficulty with the USB method.
You can't program the board over Ethernet.
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Ok my arduino uno r3 board is working. Thanks all for your help.
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