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[on:]

   I can't upload anything to my arduino but when I try to it says
avrdude: stk500_retsync() : not in sync: resp=0x30
avrdude: stk500_disable() : protocol error, expect=0x14, resp=0x51. 

Can someone help.

111swords

[Reply #1 on:]

I've solved this problem by adding this to /hardware/boards.txt:
(I have Arduino Mega with ATMEGA1280)

Code:

mega.name=Arduino Mega


mega.upload.protocol=stk500
mega.upload.maximum_size=126976
mega.upload.speed=57600


mega.bootloader.low_fuses=0xFF
mega.bootloader.high_fuses=0xDA
mega.bootloader.extended_fuses=0xF5
mega.bootloader.path=atmega
mega.bootloader.file=ATmegaBOOT_168_atmega1280.hex
mega.bootloader.unlock_bits=0x3F
mega.bootloader.lock_bits=0x0F


mega.build.mcu=atmega1280
mega.build.f_cpu=16000000L
mega.build.core=arduino

Then select Arduino Mega from board list. Maybe help ....

[Reply #2 on:]

I am having a similar problem with my mega.  But i don't see any difference between your code and what comes standard in arduino-0022 boards.txt.