Andrew Boyson / 1-wire

Manages the 1-wire bus

Dependents:   oldheating heating

web/web-1wire-class.js@2:79cad6a51fd0, 2019-04-27 (annotated)

Committer:
andrewboyson
Date:
Sat Apr 27 09:26:15 2019 +0000
Revision:
2:79cad6a51fd0
Parent:
http/http-1wire-class.js@1:c272b1fcc834
Child:
8:ceafef18cbf7
Updated web library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 1:c272b1fcc834 1 //OneWire script
andrewboyson 1:c272b1fcc834 2 'use strict';
andrewboyson 1:c272b1fcc834 3
andrewboyson 1:c272b1fcc834 4 class OneWire
andrewboyson 1:c272b1fcc834 5 {
andrewboyson 1:c272b1fcc834 6 static DS18B20ToString(text)
andrewboyson 1:c272b1fcc834 7 {
andrewboyson 1:c272b1fcc834 8 switch (text)
andrewboyson 1:c272b1fcc834 9 {
andrewboyson 1:c272b1fcc834 10 case '7FFF': return 'CRC error' ;
andrewboyson 1:c272b1fcc834 11 case '7FFE': return 'ROM not found' ;
andrewboyson 1:c272b1fcc834 12 case '7FFD': return 'Timed out' ;
andrewboyson 1:c272b1fcc834 13 case '7FFC': return 'No device detected after reset';
andrewboyson 1:c272b1fcc834 14 case '7FFB': return 'Device removed during search' ;
andrewboyson 1:c272b1fcc834 15 }
andrewboyson 1:c272b1fcc834 16 let isNegative = false;
andrewboyson 1:c272b1fcc834 17 switch(text.charAt(0))
andrewboyson 1:c272b1fcc834 18 {
andrewboyson 1:c272b1fcc834 19 case '8': text = '7' + text.substr(1, 3); isNegative = true; break;
andrewboyson 1:c272b1fcc834 20 case '9': text = '6' + text.substr(1, 3); isNegative = true; break;
andrewboyson 1:c272b1fcc834 21 case 'A': text = '5' + text.substr(1, 3); isNegative = true; break;
andrewboyson 1:c272b1fcc834 22 case 'B': text = '4' + text.substr(1, 3); isNegative = true; break;
andrewboyson 1:c272b1fcc834 23 case 'C': text = '3' + text.substr(1, 3); isNegative = true; break;
andrewboyson 1:c272b1fcc834 24 case 'D': text = '2' + text.substr(1, 3); isNegative = true; break;
andrewboyson 1:c272b1fcc834 25 case 'E': text = '1' + text.substr(1, 3); isNegative = true; break;
andrewboyson 1:c272b1fcc834 26 case 'F': text = '0' + text.substr(1, 3); isNegative = true; break;
andrewboyson 1:c272b1fcc834 27 }
andrewboyson 1:c272b1fcc834 28 let value = parseInt(text, 16) / 16.0;
andrewboyson 1:c272b1fcc834 29 if (isNegative) value = -value;
andrewboyson 1:c272b1fcc834 30 return value.toFixed(1);
andrewboyson 1:c272b1fcc834 31 }
andrewboyson 1:c272b1fcc834 32 }