Re: avrdude and fuse programming

Matt Everett <[email protected]> wrote:

> Does anyone out there use avrdude and know how to properly program
> fuses with it?  I can load my programs to my atmega32 just fine
> (using a dt006 type programming cable), but my clock options are
> stuck with the 1MHz internal oscillator until I can figure out how
> to reprogram the fuse bits!

You program them as any other memory range.  The simplest method by
now would be »terminal mode«:

avrdude ... -t
avrdude> d lf

Should tell you 0xe1, which is the default for the fuse low byte.
Setting this to 0xef should be for you, see the datasheet:

avrdude> w lf 0 0xef

avrdude> d hf

The fuse high byte, ought to be 0x99 by default.  Set it to 0x89 in
order to set the CKOPT fuse (which is used for crystals > 1 MHz):

avrdude> w hf 0 0x89
avrdude> q

-- 
J"org Wunsch					       Unix support engineer
[email protected]        http://www.interface-systems.de/~j/