[avrdude-dev] [bug #28566] Adress mismatch and errors on writing eeprom to attiny85

[Joerg Wunsch]

Update of bug #28566 (project avrdude):

                  Status:                    None => Works For Me           
             Assigned to:                    None => joerg_wunsch           

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Follow-up Comment #1:

I'm afraid it's either a problem with your programmer,
or your ISP clock being too high (as someone already
suspected in the mikrocontroller.net forum).  I ran your
test file on a genuine STK500v2 (not even using the most
recent firmware), and it programmed the EEPROM fine:

% ./avrdude -C avrdude.conf -p attiny85 -c stk500v2 -P /dev/cuad0 -B10 -U
ee:w:/tmp/test.eep:r

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.01s

avrdude: Device signature = 0x1e930b
avrdude: reading input file "/tmp/test.eep"
avrdude: writing eeprom (512 bytes):

Writing | ################################################## | 100% 1.29s

avrdude: 512 bytes of eeprom written
avrdude: verifying eeprom memory against /tmp/test.eep:
avrdude: load data eeprom data from input file /tmp/test.eep:
avrdude: input file /tmp/test.eep contains 512 bytes
avrdude: reading on-chip eeprom data:

Reading | ################################################## | 100% 0.59s

avrdude: verifying ...
avrdude: 512 bytes of eeprom verified

avrdude: safemode: Fuses OK

avrdude done.  Thank you.

This is with the SVN version of AVRDUDE although I doubt
it will make a difference to stock version 5.8 except for
the SVN version being faster since it uses paged writes.

Just noticed in your log:

         Vtarget         : 0.0 V
         SCK period      : 0.1 us

Whatever that means for your programmer...  My STK500
reports:

         Vtarget         : 3.3 V
         SCK period      : 9.8 us

(I've been using option -B10 to be on the safe side, as
my ATtiny85 ran with the default 1 MHz clock.)

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