DS18b20 digital thermometer AVR in C

I experiment with DS18b20 (digital thermometer) using C (WAVR/AVR STUDIO) and AVR ATMEGA (Atmega16) processor. You can see 2 devices wired :
http://gdlpogoda.republika.pl/youtube/1wire.jpg

I've written Search_rom 1-Wire algorithm in 2 versions.

One uses 64xN bits to store all 64bit codes of N devices on the bus.
http://gdlpogoda.republika.pl/youtube/1wire.rar

The other addresses devices simply by using number from 1 to N, where N is the number of devices on the bus.
http://gdlpogoda.republika.pl/youtube/1wireLOW_MEM.rar
Advantage of this version is low RAM consumption due to lack of huge array.

These libraries make temperature conversion on ds18b20/1820 rather easy. You simply need to write 3 lines of code. Use readme file to config libraries according to your hardware, more at readme file inside rar file.

More here (mostly PL language) : http://mathmed.blox.pl/html

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Biblioteki 1Wire, ściągnij z powyższych linków, w środku (readme.txt) jest polski opis.

Odwiedź mnie na : http://mathmed.blox.pl/html

Category:

Education

Tags:

• 1 Wire
• AVR
• atmega
• microcontroller
• mikrokontroler
• elektronika
• ds18b20
• ds1820
• temperature
• thermometer