[Reply is placed inline]

On Wed, Aug 13, 2003 at 09:43:55PM -0400, Ken Pergola wrote:
> Make an assumption regarding the DQ line and then test the assumption (see
> code below):

After reading the code, the comment makes sense to me. I like it, and
thank you for it. Saves a little bit of processor time and saves space
in the PICs memory. Woo! Back to coding I go! ;)

> Also you will have an easier time with code maintenance if you do the
> following:
>         #define CLK     PORTA, 1
>         #define DQ      PORTA, 0

So THAT is how you define a bit level location!! That will make life
MUCH easier! Thank you a lot for that tip, and thanks Andy. ;)

> Andy Warren taught me this many years ago (thanks Andy!)
>         BCF     CLK        ; Bring CLK low
>         BSF     DQ         ; Assume DQ line will be a '1'
>         BTFSS   ReadCmd,0  ; If bit 0 is clear, write a 0 to the
>         BCF     DQ         ; Assumption was wrong: force DQ line to 0
>         BSF     CLK        ; Bring CLK high to tell temp. sensor
>                            ; to read the next bit
>         DECFSZ  BitCount,1 ; Decrement count of bits left to send
>         GOTO    SendCmd    ; If more bits need to be sent ...

--
sabachka-piclist@oddmagic.net

Logic: The art of being wrong with confidence...

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