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[on:]

I have been having trouble uploading sketches to my 2560 R2. I am using Windows XP. Sometimes everything works fine, and sometimes it will not work and times out with the message:

avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer
avrdude: stk500v2_command(): failed miserably to execute command 0x11
avrdude: stk500v2_disable(): failed to leave programming mode

And then I try it again with no changes in between tries and it works fine. Needless to say this is a huge waste of time, although with patience I have always been able to get the sketches to upload eventually.
Anyone have a clue what's going on and how to fix it?
Thanks,
mike

[Reply #1 on:]

HELPPP NEEDED HERE TOOOO

[Reply #2 on:]

Do you guys have anything hooked up to the Mega's pins 0 & 1? Having anything hooked up to those pins may interfere with serial communication when programming.

[Reply #3 on:]

no it's brand new i was testing it with the blink example   never worked !!!

updated firmware to ATmega16U2 tried version 1.0, 0022 and 0023, nothing worked only Rx blinking with timeout errors just in the 0022 the led marked L blinked once when pressing the upload button

this is the upload on 0023 with shift :

Binary sketch size: 1588 bytes (of a 258048 byte maximum)
/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin/avrdude -C/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/etc/avrdude.conf -v -v -v -v -patmega2560 -cstk500v2 -P/dev/cu.usbmodemfa141 -b115200 -D -Uflash:w:/var/folders/tw/pvysvp5j30nfl10nlwfxkjn40000gn/T/build3435776181375428451.tmp/Blink.cpp.hex:i

avrdude: Version 5.4-arduino, compiled on Oct  9 2007 at 11:20:31
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/

         System wide configuration file is "/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/etc/avrdude.conf"
         User configuration file is "/Users/ahmadzein/.avrduderc"
         User configuration file does not exist or is not a regular file, skipping

         Using Port            : /dev/cu.usbmodemfa141
         Using Programmer      : stk500v2
         Overriding Baud Rate  : 115200
avrdude: Send: . [1b] . [01] . [00] . [01] . [0e] . [01] . [14]
avrdude: ser_recv(): programmer is not responding
avrdude: stk500_2_ReceiveMessage(): timeout
avrdude: Send: . [1b] . [01] . [00] . [01] . [0e] . [01] . [14]
avrdude: ser_recv(): programmer is not responding
avrdude: stk500_2_ReceiveMessage(): timeout
avrdude: Send: . [1b] . [01] . [00] . [01] . [0e] . [01] . [14]
avrdude: ser_recv(): programmer is not responding
avrdude: stk500_2_ReceiveMessage(): timeout
avrdude: Send: . [1b] . [01] . [00] . [01] . [0e] . [01] . [14]


any idea !?!?! pleaseee helppp

[Reply #4 on:]

everyone.  I have had the same problem with my board!    I am able to make it work by first connecting through realterm.  If I do that first... then program using the gui like normal it works?   Why, I don't know...

[Reply #5 on:]

Guys.   I used the avrdude.exe and avrdude.conf file from 022 and it worked fine for me.  There seems to be a bug in avrdude 5.11 that is causing some of these issues.   But if 022 didn't work, then maybe you have worse problems?

[Reply #6 on:]

Use "wiring" instead of "stk500v2" : work's fine on Mega2560 R3 

[Reply #7 on:]

Hi,
Sorry about the delay in replying. There is nothing hooked up to any pins. I am only running sketches on the 2560 and watching the serial output to see how it functions. How can I use "wiring" to upload instead of avrdude?

[Reply #8 on:]

Be sure your code hasn't any string with "!!!" inside

This is not a joke:
  http://code.google.com/p/arduino/issues/detail?id=797