Perhaps this C code can help with your algorithm:
http://www.microchipc.com/sourcecode/#ds1821

Wes

On Mon, Aug 23, 2004 at 01:59:49PM +0800, Ryan Smith wrote:
> hello
>
> I am trying to build a digital temperature sensor using a DS1821 temp
> sensor and a PIC16F628.
> I am having trouble determining how I am supposed to talk to the
> temperature sensor. I'm trying to go by the data sheet but I dont seem
> to be getting an acknowledge at all. When I try to tell it to start
> sending data I get nothing.
> Does anyone have any idea where I could be going wrong. Or at least a
> sample program so I can see what its supposed to look like on a cro.
>
> cheers
> Ryan
>
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