[avrdude-dev] [bug #52318] Fuse progamming error

[anonymous]

URL:
  <http://savannah.nongnu.org/bugs/?52318>

                 Summary: Fuse progamming error
                 Project: AVR Downloader/UploaDEr
            Submitted by: None
            Submitted on: Tue 31 Oct 2017 05:50:42 PM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Art
        Originator Email: address@hidden
             Open/Closed: Open
                 Release: 6.3
         Discussion Lock: Any
     Programmer hardware: usbasp
             Device type: attiny10

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Details:

As per the title. I wrote the fuse value of 0xfe which disables the reset pin
on this MCU. I then put 12V on the reset pin, and tried to write the value
0xff, which should enable it again. AVR dude says the value was written, but
then spits out this:
avrdude: verification error, first mismatch at byte 0x0000
         0xfe != 0xff
I tried a few other fuse values, but none of them worked. Not a big deal as I
could still reprogram the unit as normal, so long as I had 12V on the reset
pin. I couldn't leave well enough alone though, so I went googling. I came
across a german forum post which I misunderstood. Consequently, I tried
writing the fuse value of 0x00, and it worked. Now that seems to have done
something strange to the MCU.
I still seem to be able to write to it, but the output doesn't match what I'd
expect. For example, if I set it to toggle a pin every 500ms, it seems to do
it every 50ms.
When I supply 12V to the reset pin & then try to write the fuse, I get this:
    C:\Program Files (x86)\MHV AVR Tools\bin>avrdude -p attiny10 -P usb -c
usbasp -B 10 -v -u -U fuse:w:0xFF:m

avrdude: Version 6.2, compiled on Nov 20 2015 at 23:33:37
     Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
     Copyright (c) 2007-2014 Joerg Wunsch

     System wide configuration file is "C:\Program Files (x86)\MHV AVR
Tools\bin\avrdude.conf"

     Using Port                    : usb
     Using Programmer              : usbasp
     Setting bit clk period        : 10.0
     AVR Part                      : ATtiny10
     Chip Erase delay              : 0 us
     PAGEL                         : P00
     BS2                           : P00
     RESET disposition             : dedicated
     RETRY pulse                   : SCK
     serial program mode           : yes
     parallel program mode         : yes
     Timeout                       : 0
     StabDelay                     : 0
     CmdexeDelay                   : 0
     SyncLoops                     : 0
     ByteDelay                     : 0
     PollIndex                     : 0
     PollValue                     : 0x00
     Memory Detail                 :

                              Block Poll               Page
  Polled
       Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages MinW  MaxW 
 ReadBack
       ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- -----
---------
       signature      0     0     0    0 no          3   16      0     0     0
0x00 0x00
       fuse           0     0     4    0 no          1   16      0     0     0
0x00 0x00
       calibration    0     0     0    0 no          1   16      0     0     0
0x00 0x00
       lockbits       0     0     0    0 no          1   16      0     0     0
0x00 0x00
       flash          0     0   128    0 no       1024   16      0     0     0
0x00 0x00

     Programmer Type : usbasp
     Description     : USBasp, http://www.fischl.de/usbasp/

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.03s

avrdude: Device signature = 0x1e9003 (probably t10)
avrdude: reading input file "0xFF"
avrdude: writing fuse (1 bytes):

Writing | ################################################## | 100% 0.11s

avrdude: 1 bytes of fuse written
avrdude: verifying fuse memory against 0xFF:
avrdude: load data fuse data from input file 0xFF:
avrdude: input file 0xFF contains 1 bytes
avrdude: reading on-chip fuse data:

Reading | ################################################## | 100% 0.03s

avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x0000
         0x00 != 0xff
avrdude: verification error; content mismatch

avrdude done.  Thank you.


C:\Program Files (x86)\MHV AVR Tools\bin>    




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