DS18S20 code sample wanted

stamptrol

·Hello folks,

··· I'm changing a temperature monitoring system from the DS1620 (3 wire shiftin/shiftout) to the DS18S20 (1-wire).

··· I'm using the BS2px with 1-wire support.

··· I know I've seen a sample piece of code somewhere, just can't find it!

··· Can anyone point me in the right direction?

·Thanks,

·Tom

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Tom Sisk

http://www.siskconsult.com
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phil kenny

Is this it?

http://forums.parallax.com/showthread.php?p=642254

phil

Post Edited (phil kenny) : 12/17/2007 2:40:24 PM GMT

stamptrol

Phil,

Thanks for that! It should work just fine.

Regards,

Tom

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Tom Sisk

http://www.siskconsult.com
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Tracy Allen

Tom be carefull with the part numbers. Dallas Semi has a habit of using similar or even identical part numbers for devices that have important differences in programming. The difference between the DS1820, DS18S20 and the DS18B20 is a case in point. The most state of art device in the family is the DS18B20, which always returns the high resolution (12 bit signed) value while the earlier ones were 9 bits unless you went to extra trouble to read the high resolution registers. Code written for the "B" will not work on the "." and the "S" and vice versa.

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Tracy Allen
www.emesystems.com

stamptrol

Thanks Tracy,

I had noticed the 9-bit vs 12-bit issue.

I got the code working with the ds1820 after finding a damaged ds18s20.

Regards,

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Tom Sisk

http://www.siskconsult.com
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