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Old 02-05-2009, 09:57 AM   #2 (permalink)
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UPDATE: I was able to upload a sketch by pulling the ATmega out of the MPGuino and plugging it into an iDuino. The upload worked. Then I put the ATmega back into the MPGuino and it seems to run normally. The sketch has the serial data commented out. I confirmed that no serial data is now being sent.

Unfortunately, I still cannot upload to the MPGuino!

Since upload to the iDuino works, I assume that the PC side of the USB comm is functioning. The previous sketch was sending serial data and that data was visible in Arduino, so the serial send from the MPGuino is working. But I don't know if the MPGuino receive is working.

Any thoughts on how I can troubleshoot the USB connection on the MPGuino side?
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