Re: [avr-gcc-list] light up and led

[Patrick Blanchard]

On Thu, 2005-10-06 at 21:59 +0200, Joerg Wunsch wrote:
> Patrick Blanchard <address@hidden> wrote:
> 
> >> Yes, use a hardware timer. ;-)  ...
> 
> >> Otherwise, have a look at the functions in <avr/delay.h>.
> 
> > FWIW using the delay.h made more sense for me; easier code to
> > follow.
> 
> It eats up your CPU.  Even if you don't have any other work for your
> CPU while waiting, with a hardware timer, you could at least reduce
> the overall power consumption by putting the CPU to sleep.
> 
> Sure, for really short delays, a spin-loop makes sense, but when
> you want your LED to blink, just use it as a good example to get
> acquainted with hardware timers (even though obviously, conserving
> energy isn't the most important feature of a LED blinker ;-).
> 
> It's for some reason that even the very simple demo.c that accompanies
> avr-libc uses a hardware timer.

after now knowing about the C99 syntax, the ISR approach make a lot more
sense. I preferred ISRs w/ CVavr because they were easy to implement and
worked better than polling or looping in main() for most everything... I
guess this means I owe you a beer.