How do I change fuse bits - not communicating?
Currently I'm working on a project using an ATmega 2560 microcontroller card with a 10 MHz crystal. My main goal is to use the Arduino IDE to upload sketches to this chip to run my bread board circuit. In the beginning I had planned to use Atmel Studio to upload Arduino Sketches, but I decided to go with the more direct route. I am using two programmers, the Atmel ICE, and the Atmel AVR ISP MKii.
Anyway, here is my issue. I tried to use the Arduino IDE and the MKii to burn the bootloader to the chip. However, it did not work. It uploaded, but I was at that point no longer able to communicate with the device. When I switched to Atmel Studio, and used the ICE programmer, my chip could not be read and recognized (whereas before it could). I can't even program it. (I had bought two.)
I then figured I would try and read the fuse bits on the other programmer and burn the bootloader using Atmel Studio (since the Arduino IDE has no information on this), and I looked up the proper bits to change and then burned the bootloader. It worked fine, and I then changed the fuse bits which resulted in an error and now I again could talk to the device.
I am guessing that something is going wrong with the suggested fuse bits, but I do not know how to change them or how to fix this. The original fuse bits that I read from the device are listed below (before I messed it up).
I checked my wiring a billion times and it is all perfect. I just need suggestions to fix this mess, thanks.
BODLEVEL = DISABLED
OCDEN = [ ]
JTAGEN = [X]
SPIEN = [X]
WDTON = [ ]
EESAVE = [ ]
BOOTSZ = 4096W_1F000
BOOTRST = [X]
CKDIV8 = [ ]
CKOUT = [ ]
SUT_CKSEL = INTRCOSC_6CK_0MS
EXTENDED = 0xFF (valid)
HIGH = 0x98 (valid)
LOW = 0xC2 (valid)
LB = NO_LOCK
BLB0 = NO_LOCK
BLB1 = NO_LOCK
LOCKBIT = 0xFF (valid)
Detected device
Device name ATmega2560
Device signature 0x1E9801
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