NAME

avr-fuses - a commandline fuse value calculator for AVR microcontrollers

SYNOPSIS

   $ avr-fuses --part m328
   -U efuse:w:0xFF:m -U hfuse:w:0xD9:m -U lfuse:w:0x62:m

   $ avr-fuses --part m328 CKDIV8=1
   -U efuse:w:0xFF:m -U hfuse:w:0xD9:m -U lfuse:w:0xE2:m

DESCRIPTION

This program interprets the contents of definition files ("ATDF files") provided by Microchip (formerly Atmel) that describe the configuration fuses of AVR microcontrollers.

Individual fuses may be named on the commandline, each giving a value in the form NAME=VALUE. These will be applied on top of the default values for the chosen part.

The program ends by printing new values for the fuse configuration registers, in a form suitable to paste directly into an avrdude commandline. This may be useful in a shell fragment, such as

   $ avrdude -c avrisp -p m328 $(avr-fuses -p m328 CKDIV8=1)

OPTIONS

-h, --help

Displays a summary of the commandline and options

-v, --verbose

Describe the meaning of each individual named fuse while parsing it

-p, --part NAME

Gives the part name of the chosen microcontroller. Parts may be specified in the following ways:

   ATmega328PB
   atmega328pb
   m328pb

   ATtiny84A
   attiny84a
   t84a

Specfically, these are the same forms as recognised by avr-gcc's -mmcu option and avrdude's -p option, for convenience in Makefiles and build scripts.

-f, --fuse FUSE=VALUE

Supplies a value from one of the fuse configuration registers. This is useful combined with the --verbose option to decode values read from an AVR chip.

AUTHOR

Paul Evans <leonerd@leonerd.org.uk>