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Topic: avrdude sync problem (Read 1 time) previous topic - next topic

Simonas

Spcomputing,
i triend the link, and downloaded the modified IDE, however it did not work. I tried out the board on a different computer, with win xp and was also unable to upload a program (i installed the drivers ofcourse), however, in device manager (in win xp), the arduino was displayed similarly like on my computer ( similarly like the photo i posted), that might suggest that in fact, something might be wrong with the actual board, any suggestions? :)

spcomputing

Hmmm...this is very interesting.  I have an Uno R2 that enumerates as a "Communications Port" and a Uno R3 that enumerates as a "Arduino Uno".  Obviously, they run different firmware, but I was sure that it came up R2.  Anyhow...

Have you tried to upload a sketch through the IDE to the Communications Port COM34?

Simonas

Spcomputing, ofcourse, i tried changing ports (eg. from COM3 to COM 1, 2 ... , tried COM34, and different ones), however, got the same result. It is strange, that whenever i change the port number in device manager, arduino IDE seems to show that one port. Another interesting thing that i noticed is that whenever i try to upload any kind of program to the arduino, the tx and rx lights blink a couple of times, but are very dim, i didn't even notice that before, that means that something is being sent i guess... What do you think, maybe i should try to reset the actual board some way, perhaps you have any ideas how to do that and if it is possible at all when there is no communication?

Simonas

By the way, i tried the loop back (http://arduino.cc/forum/index.php?topic=73748.0). And everything seems to work, though at first, everything got mirrored back, even when the specified pins were not connected, kind of strange... but after reconnecting, the board passed the test. When no jumpers are connected and i type something in, the rx led flashes, when the jumpers are connected, both the rx and tx pins flash upon imputing something in. This leads to believe, that perhaps the drivers and serial to usb converter on the board are working good, what are other possibilities?

spcomputing

Quote
This leads to believe, that perhaps the drivers and serial to usb converter on the board are working good, what are other possibilities?


The only one that remains is the bootloader on the Atmega328 is corrupted.  When you plug power or USB into your Uno, do you get three fast flashes on the user LED marked "L"?

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