[dorkbotpdx-blabber] Dragon / 168 / AVR Studio ?

[Hans Lindauer]

Thanks, this makes sense.  So if you want the chip to verify properly, 
you have to count the unused bits as if they were 1s.

Note that using 0xFF instead of 0x3F in the Lockbits section gets me 
around the same error.

I also just found this page, which lists slightly different fuse 
settings: http://www.arduino.cc/playground/Learning/Burn168  The 
difference is that brownout detection has been disabled (high fuse = 
0xDF) and LPM and SPM are prohibited in the boot section (lockbit = 
0xCF).  Wish I'd found that page last night, I might have been in a 
better mood.

I noticed it also says that virgin chips /must/ be flashed at 125.0kHz; 
could that have been part of the problem when I was trying using ISP?

-Hans


Donald Delmar Davis wrote:
> You are right here.
> I remember avrdude having an issue where they worked around this in 
> the software.
>
> Nice catch.
>
> On Jun 9, 2009, at 5:11 PM, coldham2 at mac.com <mailto:coldham2 at mac.com> 
> wrote:
>
>>
>> On Jun 9, 2009, at 3:41 PM, Hans Lindauer wrote:
>>
>>>
>>> I did have one problem: I tried to write the extended fuses at 0x00, 
>>> but when AVR Studio verified them, they were at 0xF8.  These seem to 
>>> be the same settings when you enter them into the dialog, but I just 
>>> want to be sure.
>>
>> This may be noise, because I'm not really expert with this, but... if 
>> there are only 3 extended fuse bits, and you were to write 0x00, that 
>> is 0000 0000, then the last 3 bits would be the same as 0xF8, which 
>> is 1111 1000. So it may be reading those last three bits back to you 
>> correctly, and the other bits don't matter. Anyone?
>>
>> Collin
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