[avr-chat] Problem writing lock byte to atmega8 using avrdude and avrisp mkII

[Michael Jonas]

Hey!

I am trying to convert the script provided with Arduino into a version
working with avrdude (I am using an AVRISP mkII over USB from a MAC OS X)

As the original script I am trying to write the lock byte first. The
connection to the programmer and to the board seems to work ok, but
somehow I am unable to write the lock byte.



Thanks


#######################################
Here is the command and output:

/usr/local/bin/avrdude -v -p m8 -b 115200 -P usb -c avrispmkII -U
lock:w:0xff:m

avrdude: Version 5.1
     Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/

     System wide configuration file is "/usr/local/etc/avrdude.conf"
     User configuration file is "/Users/michel/.avrduderc"
     User configuration file does not exist or is not a regular
file, skipping

     Using Port            : usb
     Using Programmer      : avrispmkII
     Overriding Baud Rate  : 115200
avrdude: usbdev_open(): Found AVRISP mkII, serno: 0000A0007237
     AVR Part              : ATMEGA8
     Chip Erase delay      : 10000 us
     PAGEL                 : PD7
     BS2                   : PC2
     RESET disposition     : dedicated
     RETRY pulse           : SCK
     serial program mode   : yes
     parallel program mode : yes
     Timeout               : 200
     StabDelay             : 100
     CmdexeDelay           : 25
     SyncLoops             : 32
     ByteDelay             : 0
     PollIndex             : 3
     PollValue             : 0x53
     Memory Detail         :

                              Block Poll               Page
           Polled
       Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages
MinW  MaxW   ReadBack
       ----------- ---- ----- ----- ---- ------ ------ ---- ------
----- ----- ---------
       eeprom         4    10   128    0 no        512    0      0
9000  9000 0xff 0xff
       flash         33     6    64    0 yes      8192   64    128
4500  4500 0xff 0x00
       lfuse          0     0     0    0 no          1    0      0
2000  2000 0x00 0x00
       hfuse          0     0     0    0 no          1    0      0
2000  2000 0x00 0x00
       lock           0     0     0    0 no          1    0      0
2000  2000 0x00 0x00
       calibration    0     0     0    0 no          4    0      0
0     0 0x00 0x00
       signature      0     0     0    0 no          3    0      0
0     0 0x00 0x00

     Programmer Type : STK500V2
     Description     : Atmel AVR ISP mkII
     Hardware Version: 44
     Firmware Version: 1.1
     Topcard         : Unknown
     Vtarget         : 4.8 V
     Varef           : 4.8 V
     Oscillator      : 75.233 kHz
     SCK period      : 953.29 us

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.17s

avrdude: Device signature = 0x1e9307
avrdude: safemode: lfuse reads as DF
avrdude: safemode: hfuse reads as CA
avrdude: reading input file "0xff"
avrdude: writing lock (1 bytes):

Writing |                                                    | 0%
0.00s ***failed;
Writing | ################################################## | 100% 0.33s

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

Reading | ################################################## | 100% 0.09s

avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x0000
     0xff != 0x0f
avrdude: verification error; content mismatch

avrdude: safemode: lfuse reads as DF
avrdude: safemode: hfuse reads as CA
avrdude: safemode: Fuses OK

avrdude done.  Thank you.