Erik -
Library for reading temperature from DS1820, DS18B20 and DS1822
Dependents: heatmap BLE_Temperature BLE_Temperature_Exercise F334andDS18B20 ... more
Fork of
DS1820
by 
David Pairman
HelloWorld: http://mbed.org/users/Sissors/code/DS1820_HelloWorld/
Library should currently work on all mbed targets, let me know if there is an issue. First however make sure you have latest version of mbed library and this library.
Diff: DS1820.cpp
- Revision:
- 10:d297ce9ce422
- Parent:
- 9:3821ca0b7f14
- Child:
- 11:1a3c3002b50c
--- a/DS1820.cpp Thu Jan 29 19:27:32 2015 +0000
+++ b/DS1820.cpp Fri Jan 30 11:07:10 2015 +0000
@@ -361,18 +361,16 @@
}
answer = reading +0.0; // convert to floating point
if ((FAMILY_CODE == FAMILY_CODE_DS18B20 ) || (FAMILY_CODE == FAMILY_CODE_DS1822 )) {
- answer = answer / 8.0;
+ answer = answer / 16.0;
}
else {
remaining_count = RAM[6];
count_per_degree = RAM[7];
- answer = answer - 0.25 + (count_per_degree - remaining_count) / count_per_degree;
+ answer = floor(answer/2.0) - 0.25 + (count_per_degree - remaining_count) / count_per_degree;
}
- if (scale=='C' or scale=='c')
- answer = answer / 2.0;
- else
+ if (scale=='F' or scale=='f')
// Convert to deg F
- answer = answer * 9.0 / 10.0 + 32.0;
+ answer = answer * 9.0 / 5.0 + 32.0;
}
return answer;
}
DS1820