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Re: [avrdude-dev] Atmega32u2
From: |
Joerg Wunsch |
Subject: |
Re: [avrdude-dev] Atmega32u2 |
Date: |
Tue, 27 Jul 2010 07:22:12 +0200 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
As Jkx wrote:
> This is really slow while writing (without any timeout msg).
Well, not a big surprise, with that slow ISP clock.
> And worst, the 32u2 has 32k vs 16k on the 162 of
> course.
Well, *that* was certainly expected, of course. :-)
> SCK period : 260.5 us
Try adding -B10 to the commandline. That should make it substantially
faster. I hope it will also cure the misreads.
> avrdude: Expected signature for AT90USB162 is 1E 94 82
> avrdude: safemode: lfuse reads as 5E
> avrdude: safemode: hfuse reads as D9
> avrdude: safemode: efuse reads as F4
ATmega32U2 has 1E 95 8A. The signature read shows that the entire
read procedure is completely flakey. At this point, you probably
shouldn't have used -F at all, to avoid additional failures resulting
from the poor communication.
--
cheers, J"org .-.-. --... ...-- -.. . DL8DTL
http://www.sax.de/~joerg/ NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)