peiyu wang / Mbed 2 deprecated Grove_Temp_Hello_world

Grove Temp sensor Hello world example

Dependencies:   Grove_temp_sensor mbed

Grove_temp_sensor.h@0:3fa32ef93fdc, 2016-03-09 (annotated)

Committer:
peipei123
Date:
Wed Mar 09 00:00:46 2016 +0000
Revision:
0:3fa32ef93fdc
Child:
2:772a59579086
Hello world Example

Who changed what in which revision?

UserRevisionLine numberNew contents of line
peipei123 0:3fa32ef93fdc 1 #include "mbed.h"
peipei123 0:3fa32ef93fdc 2
peipei123 0:3fa32ef93fdc 3 //Setup a new class for Grove_temp_sensor sensor
peipei123 0:3fa32ef93fdc 4 class Grove_temp_sensor
peipei123 0:3fa32ef93fdc 5 {
peipei123 0:3fa32ef93fdc 6 public:
peipei123 0:3fa32ef93fdc 7 Grove_temp_sensor(PinName pin);
peipei123 0:3fa32ef93fdc 8 Grove_temp_sensor();
peipei123 0:3fa32ef93fdc 9 float read();
peipei123 0:3fa32ef93fdc 10 private:
peipei123 0:3fa32ef93fdc 11 //class sets up the AnalogIn pin
peipei123 0:3fa32ef93fdc 12 AnalogIn _pin;
peipei123 0:3fa32ef93fdc 13 };
peipei123 0:3fa32ef93fdc 14
peipei123 0:3fa32ef93fdc 15 Grove_temp_sensor::Grove_temp_sensor(PinName pin) : _pin(pin)
peipei123 0:3fa32ef93fdc 16 {
peipei123 0:3fa32ef93fdc 17 // _pin(pin) means pass pin to the AnalogIn constructor
peipei123 0:3fa32ef93fdc 18 }
peipei123 0:3fa32ef93fdc 19
peipei123 0:3fa32ef93fdc 20 float Grove_temp_sensor::read()
peipei123 0:3fa32ef93fdc 21 {
peipei123 0:3fa32ef93fdc 22
peipei123 0:3fa32ef93fdc 23 double a;
peipei123 0:3fa32ef93fdc 24 a=_pin.read()*1023;
peipei123 0:3fa32ef93fdc 25 double resistance=(float)(1023-a)*10000/a;
peipei123 0:3fa32ef93fdc 26 double temperature=1/(log(resistance/10000)/3975+1/298.15)-276.05;
peipei123 0:3fa32ef93fdc 27 //conver C to F;
peipei123 0:3fa32ef93fdc 28 temperature = (9.0*temperature)/5.0 + 32.0;
peipei123 0:3fa32ef93fdc 29 return temperature;
peipei123 0:3fa32ef93fdc 30 }
peipei123 0:3fa32ef93fdc 31
peipei123 0:3fa32ef93fdc 32
peipei123 0:3fa32ef93fdc 33