Re: [avr-libc-dev] Re: [avrdude-dev] avrdude GUI with Fuse Calculator

[Erik Christiansen]

On Thu, Nov 29, 2007 at 01:06:26PM -0700, Shaun Jackman wrote:
> 
> Each fuse bit is currently defined as an inverted mask. For example:
> #define BOOTRST ~_BV(0)  /* Select Reset Vector */
> I would prefer the flags be defined uninverted.
> EFUSE = ~(BOOTRST | BOOTSZ0 | BOOTSZ1);

Since this describes _what_ is intended, in positive logic, it is
natural and clear, I believe.

> looks better to me than
> EFUSE = BOORST & BOOTSZ0 & BOOTSZ1;

This De Morgan equivalent is aligned with _how_ the physical fuses work,
but employing negated logic isn't normal usage. It works, but it's not
so convenient.

Erik