Tema SCPI Negru Rares-Razvan
Dependencies: BLE_API mbed nRF51822
Fork of nRF51822_TemperatureEx by
Diff: main.cpp
- Revision:
- 13:bd15c17003e7
- Parent:
- 12:7772974713ac
--- a/main.cpp Sat Oct 08 10:30:15 2016 +0000 +++ b/main.cpp Mon Oct 24 10:09:39 2016 +0000 @@ -288,8 +288,28 @@ // use Vin.read() o read the voltage from the AI5 pin // fell free to the fill code in this function .... - // aditionally you can declare globals variables at the begining of the file or in myData.h - + + //Let us consider the input voltage ranges from 0-3.3v.That means that the 0 voltage input from AI5 means the temperature of the resistor + //is -55 degrees,and a 3v3 input in AI5 means that the termistor is at 125 degrees. + //The number of values that can be inputed from 0 to 3v3 is 180 values. + //That means that each 0.018V increase on the input means that the temperature rised with 1 degree,and every decrease + //of 0.018V means that the temperature went down with 1 degree Celsius. + //Let us now read the voltage from the AI5 pin + resistance=Vin.read(); + //Based on my calculations,if the voltage is under 1.01V,the temperature is negative.With that in mind + //We will separate negative from positive values. + if(resistance<=1.01) + { + if(resistance<0.018) + { + tempValue=-55; + } + tempValue=-55+resistance/0.018; + + } + tempValue=0+resistance/0.018; + +