I have locked my atmega328PB when i try to use the bootloader

[Georgesorin]

Hi...

I have followed the tutorial which describe how to install the bootloader over an atmega328PB..

But when i tried to to that...the installation showed "Bootloader failed" but...now the cip is not detectable...is just stop working ...and i think the bootloader has reseted the fuse or something....

This is for an important project for my electrical engeennering course...and i don;t want to fail...please help me with this isseu...

Here is what arduino ide displayed when i tried to burn the bootloader...

`Arduino: 1.8.5 (Windows 10), Board: "Pololu A-Star 328PB, 5V, 16MHz"

C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf -C+C:\Users\georg\AppData\Local\Arduino15\packages\pololu-a-star\hardware\avr\4.0.2/extra_avrdude.conf -v -patmega328pb -cusbasp -Pusb -B 5 -e -Ulock:w:0xFF:m -Uefuse:w:0xF4:m -Uhfuse:w:0xDE:m -Ulfuse:w:0xFF:m

avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53 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)\Arduino\hardware\tools\avr/etc/avrdude.conf"
     Additional configuration file is "C:\Users\georg\AppData\Local\Arduino15\packages\pololu-a-star\hardware\avr\4.0.2/extra_avrdude.conf"

avrdude: warning at C:\Users\georg\AppData\Local\Arduino15\packages\pololu-a-star\hardware\avr\4.0.2/extra_avrdude.conf:1: part m328pb overwrites previous definition C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf:8710.

     Using Port                    : usb
     Using Programmer              : usbasp
     Setting bit clk period        : 5.0
     AVR Part                      : ATmega328PB
     Chip Erase delay              : 9000 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        65    20     4    0 no       1024    4      0  3600  3600 0xff 0xff
       flash         65     6   128    0 yes     32768  128    256  4500  4500 0xff 0xff
       lfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       hfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       efuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       lock           0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       calibration    0     0     0    0 no          1    0      0     0     0 0x00 0x00
       signature      0     0     0    0 no          3    0      0     0     0 0x00 0x00

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

avrdude: set SCK frequency to 187500 Hz avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e9516 (probably m328pb) avrdude: erasing chip avrdude: set SCK frequency to 187500 Hz avrdude: reading input file "0xFF" avrdude: writing lock (1 bytes):

C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf -C+C:\Users\georg\AppData\Local\Arduino15\packages\pololu-a-star\hardware\avr\4.0.2/extra_avrdude.conf -v -patmega328pb -cusbasp -Pusb -B 0.5 -Uflash:w:C:\Users\georg\AppData\Local\Arduino15\packages\pololu-a-star\hardware\avr\4.0.2/bootloaders/optiboot/optiboot_atmega328pb_16mhz.hex:i -Ulock:w:0xCF:m Writing | ***failed;
################################################## | 100% 0.03s

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% 0.00s

avrdude: verifying ... avrdude: WARNING: invalid value for unused bits in fuse "lock", should be set to 1 according to datasheet This behaviour is deprecated and will result in an error in future version You probably want to use 0x3f instead of 0xff (double check with your datasheet first). avrdude: 1 bytes of lock verified avrdude: reading input file "0xF4" avrdude: writing efuse (1 bytes):

Writing | ################################################## | 100% 0.01s

avrdude: 1 bytes of efuse written avrdude: verifying efuse memory against 0xF4: avrdude: load data efuse data from input file 0xF4: avrdude: input file 0xF4 contains 1 bytes avrdude: reading on-chip efuse data:

Reading | ################################################## | 100% 0.00s

avrdude: verifying ... avrdude: 1 bytes of efuse verified avrdude: reading input file "0xDE" avrdude: writing hfuse (1 bytes):

Writing | ################################################## | 100% 0.00s

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

Reading | ################################################## | 100% 0.00s

avrdude: verifying ... avrdude: 1 bytes of hfuse verified avrdude: reading input file "0xFF" avrdude: writing lfuse (1 bytes):

Writing | ################################################## | 100% 0.00s

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

Reading | ################################################## | 100% 0.00s

avrdude: verifying ... avrdude: 1 bytes of lfuse verified

avrdude done. Thank you.

avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53 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)\Arduino\hardware\tools\avr/etc/avrdude.conf"
     Additional configuration file is "C:\Users\georg\AppData\Local\Arduino15\packages\pololu-a-star\hardware\avr\4.0.2/extra_avrdude.conf"

avrdude: warning at C:\Users\georg\AppData\Local\Arduino15\packages\pololu-a-star\hardware\avr\4.0.2/extra_avrdude.conf:1: part m328pb overwrites previous definition C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf:8710.

     Using Port                    : usb
     Using Programmer              : usbasp
     Setting bit clk period        : 0.5
     AVR Part                      : ATmega328PB
     Chip Erase delay              : 9000 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        65    20     4    0 no       1024    4      0  3600  3600 0xff 0xff
       flash         65     6   128    0 yes     32768  128    256  4500  4500 0xff 0xff
       lfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       hfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       efuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       lock           0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       calibration    0     0     0    0 no          1    0      0     0     0 0x00 0x00
       signature      0     0     0    0 no          3    0      0     0     0 0x00 0x00

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

avrdude: set SCK frequency to 1500000 Hz avrdude: error: program enable: target doesn't answer. 1 avrdude: initialization failed, rc=-1 Double check connections and try again, or use -F to override this check.

avrdude done. Thank you.

Error while burning bootloader.

This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences. `

Thank you in advance

[per1234]

Related report: https://github.com/MCUdude/MiniCore/issues/73 (note the hypothesis here: https://github.com/MCUdude/MiniCore/issues/73#issuecomment-441310492).

[DavidEGrayson]

Loading invalid clock settings onto an AVR can render it unprogrammable. In case you didn't know, the bootloader you are trying to load onto your ATmega328PB requires that it have a 16 MHz crystal/oscillator connected to it.

You could just buy the Pololu A-Star 328PB 5V, 16 MHz and use that. It already has a bootloader on it.

Or you could try getting the Pololu USB AVR Programmer v2.1 and following the instructions in the "Using the clock output to revive AVRs" section of its user's guide to repair your ATmega328PB.