Re: Dallas one - wire on avr

The problem I'm having so far is that the fastest I can toggle a bit with forth on the atmega16 running at 4MHz is only 25 uSec. I need to toggle bits much faster than that. So far the code I'm using looks like

:TOGGLE
  FF PORTA C!
  00 PORTA C!
;

Is there a divide down for the avr's data bus? Or is the interpreter really taking that long to execute the code?

How much faster would
:TOGGLE
  00 PORTA FF PORTA C! C!
;
be?

Should I just write these bits in assembler?

Thanks,
Matthew Karas

Frank Boon <fboon_at_runbox.com> wrote:

>I am implementing a 1-wire master with a DS2480B, because it can control
>the slew-rates.
>Not fully implented yet...
>
>Frank Boon,
>Metatronics
>
>Matthew Karas wrote:
>
>>Has anyone implemented one wire routines using Atmel's avr318 appnote?
>>
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