Would you have to watch out for the carry?

----- Original Message ----- 
From: "Sean Schouten" <dev.seantech@gmail.com>
To: "piclist" <piclist@mit.edu>
Sent: Thursday, January 05, 2006 5:00 PM
Subject: [PIC] Problems with RRF on PIC16F684


> Hi guys,
> 
> What seems to be no more than perhaps a simple logical operation seems to
> defy my logic.
> 
> Using the following code in a small loop, I don't seem to be getting the
> desired-output when monitoring the W-Register:
> 
> [code]
> 
> START
> 
>        MOVLW       0xFF
>        MOVWF      TEMP_VAR
> 
> 
> MAIN
> 
>        NOP
>        MOVF         TEMP_VAR, W
>        RRF            TEMP_VAR
> 
>        GOTO         MAIN
> 
> [/code]
> 
> 
> What I want to happen is this:
> 
> 11111111
> 01111111
> 10111111
> 11011111
> 11101111
> 11110111
> 
> etc....
> 
> 
> What happens is more like:
> 
> 11111111
> 01111111
> 10000000
> 11000000
> 11000001
> 11100001
> 11100010
> 
> 
> Does anybody have any idea what could be going wrong, because I am really
> lost.
> 
> Thanks,
> 
> Sean.
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