I am new to arduino as well as hardware. Recently, my arduino BT suddenly fails to be detected and programmed in windows, and I found out the reset pin(pin 7) always go high and low repeatly. I decide to upload the bootloader using the Parallel Port Programmer http://www.arduino.cc/en/Hacking/ParallelProgrammer?from=Main.ParallelProgrammer
And I follow the step decribed in herehttp://www.uchobby.com/index.php/2007/09/12/how-to-update-the-arduino/
with replaced the bootloader to bt one.
My problem is that I always face verification error
avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x3800
0x0c != 0xff
avrdude: verification error; content mismatch
avrdude: safemode: hfuse changed! Was df, and is now ff
Would you like this fuse to be changed back? [y/n]
What should I do?
Thanks a lot,