Problem Programming the APM

Hi guys. I am trying to program my APM/IMU, but I keep getting this error message:

"avrdude: stk500_getsync(): not in sync: resp=0x00

avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51"

I am using the newest Arduino (0021) and have chosen the Arduino Mega ATMega 1280 as the board and the right COM port, the green light flashes a few times before the error message pops up. I have also tried a few different PCs (XP, Win7 and Mac OS 10.6) with no luck. From what I found out online this is a common error message if you have chosen the wrong board or there is something wrong with the firmware, hopefully I won't need a new bootloader :)

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Hans Fredrik October 22, 2010 at 2:04am

Which LEDs are supposed to turn on when I turn on the APM? I have only ever seen the one red pwr LED...
Simon October 21, 2010 at 6:21am

Before you buy anything check the Port details in (Windows) Control Panel - Port x/Properties/Advanced - and make sure that RTS on Close is ticked (details in the manual for the APM !). That should do the trick.
Sebastian Gralla October 18, 2010 at 1:22am

did you connect it with usb over the IMU-Shield?
do you have a FTDI Cable/Converter to test?

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Problem Programming the APM

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