AVRDUDE: 3.2 Terminal Mode Examples

% avrdude -p m128 -c stk500 -t

avrdude: AVR device initialized and ready to accept instructions
avrdude: Device signature = 0x1e9702
avrdude: current erase-rewrite cycle count is 52 (if being tracked)
avrdude> part
>>> part 

AVR Part              : ATMEGA128
Chip Erase delay      : 9000 us
PAGEL                 : PD7
BS2                   : PA0
RESET disposition     : dedicated
RETRY pulse           : SCK
serial program mode   : yes
parallel program mode : yes
Memory Detail         :

                            Page                       Polled
  Memory Type Paged  Size   Size #Pages MinW  MaxW   ReadBack
  ----------- ------ ------ ---- ------ ----- ----- ---------
  eeprom      no       4096    8     0  9000  9000 0xff 0xff
  flash       yes    131072  256   512  4500  9000 0xff 0x00
  lfuse       no          1    0     0     0     0 0x00 0x00
  hfuse       no          1    0     0     0     0 0x00 0x00
  efuse       no          1    0     0     0     0 0x00 0x00
  lock        no          1    0     0     0     0 0x00 0x00
  calibration no          1    0     0     0     0 0x00 0x00
  signature   no          3    0     0     0     0 0x00 0x00

avrdude> dump eeprom 0 16
>>> dump eeprom 0 16 
0000  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|

avrdude> write eeprom 0 1 2 3 4
>>> write eeprom 0 1 2 3 4 

avrdude> dump eeprom 0 16
>>> dump eeprom 0 16 
0000  01 02 03 04 ff ff ff ff  ff ff ff ff ff ff ff ff  |................|

avrdude> erase
>>> erase 
avrdude: erasing chip
avrdude> dump eeprom 0 16
>>> dump eeprom 0 16 
0000  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|

avrdude>

Program the fuse bits of an ATmega128 (disable M103 compatibility, enable high speed external crystal, enable brown-out detection, slowly rising power). Note since we are working with fuse bits the -u (unsafe) option is specified, which allows you to modify the fuse bits. First display the factory defaults, then reprogram:

% avrdude -p m128 -u -c stk500 -t

avrdude: AVR device initialized and ready to accept instructions
avrdude: Device signature = 0x1e9702
avrdude: current erase-rewrite cycle count is 52 (if being tracked)
avrdude> d efuse
>>> d efuse 
0000  fd                                                |.               |

avrdude> d hfuse
>>> d hfuse 
0000  99                                                |.               |

avrdude> d lfuse
>>> d lfuse 
0000  e1                                                |.               |

avrdude> w efuse 0 0xff
>>> w efuse 0 0xff 

avrdude> w hfuse 0 0x89
>>> w hfuse 0 0x89 

avrdude> w lfuse 0 0x2f
>>> w lfuse 0 0x2f 

avrdude>