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Re: [avr-gcc-list] swap bits
From: |
Klaus Rudolph |
Subject: |
Re: [avr-gcc-list] swap bits |
Date: |
Sun, 02 Mar 2003 03:37:06 +0100 |
Hi Marek,
a bit ago you answered:
>
> > reverse_r16:
> > out porta, r16
> > in r16, portb
>
> Wrong - one more word/cycle needed:
>
> out PORTA,r16
> nop
> in r16,PINB
>
> Synchronization logic requires one cycle delay between "out" and "in"
> if we want to read the value just output, and not the previous one.
>
I´ve read that in a datasheet, but can you give me a tip where this
topic is described
from atmel? I can´t find that anymore. Currently I play a bit with
simulavr
so that is a good time to think about that again.
Bye
Klaus
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