peiyu wang / Mbed 2 deprecated Grove_Temp_Hello_world

Grove Temp sensor Hello world example

Dependencies:   Grove_temp_sensor mbed

Grove_temp_sensor.h@2:772a59579086, 2016-03-10 (annotated)

Committer:
peipei123
Date:
Thu Mar 10 19:08:46 2016 +0000
Revision:
2:772a59579086
Parent:
0:3fa32ef93fdc 
1

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 2:772a59579086 7 /** Read the servo motors current position
peipei123 2:772a59579086 8 *
peipei123 2:772a59579086 9 * @param returns A normalised number 0.0-1.0 representing the full range.
peipei123 2:772a59579086 10 */
peipei123 0:3fa32ef93fdc 11 Grove_temp_sensor(PinName pin);
peipei123 2:772a59579086 12 /** Read the servo motors current position
peipei123 2:772a59579086 13 *
peipei123 2:772a59579086 14 * @param returns A normalised number 0.0-1.0 representing the full range.
peipei123 2:772a59579086 15 */
peipei123 0:3fa32ef93fdc 16 Grove_temp_sensor();
peipei123 2:772a59579086 17 /** Read the servo motors current position
peipei123 2:772a59579086 18 *
peipei123 2:772a59579086 19 * @param returns A normalised number 0.0-1.0 representing the full range.
peipei123 2:772a59579086 20 */
peipei123 0:3fa32ef93fdc 21 float read();
peipei123 0:3fa32ef93fdc 22 private:
peipei123 0:3fa32ef93fdc 23 //class sets up the AnalogIn pin
peipei123 0:3fa32ef93fdc 24 AnalogIn _pin;
peipei123 0:3fa32ef93fdc 25 };
peipei123 0:3fa32ef93fdc 26
peipei123 0:3fa32ef93fdc 27 Grove_temp_sensor::Grove_temp_sensor(PinName pin) : _pin(pin)
peipei123 0:3fa32ef93fdc 28 {
peipei123 0:3fa32ef93fdc 29 // _pin(pin) means pass pin to the AnalogIn constructor
peipei123 0:3fa32ef93fdc 30 }
peipei123 0:3fa32ef93fdc 31
peipei123 0:3fa32ef93fdc 32 float Grove_temp_sensor::read()
peipei123 0:3fa32ef93fdc 33 {
peipei123 0:3fa32ef93fdc 34
peipei123 0:3fa32ef93fdc 35 double a;
peipei123 0:3fa32ef93fdc 36 a=_pin.read()*1023;
peipei123 0:3fa32ef93fdc 37 double resistance=(float)(1023-a)*10000/a;
peipei123 0:3fa32ef93fdc 38 double temperature=1/(log(resistance/10000)/3975+1/298.15)-276.05;
peipei123 0:3fa32ef93fdc 39 //conver C to F;
peipei123 0:3fa32ef93fdc 40 temperature = (9.0*temperature)/5.0 + 32.0;
peipei123 0:3fa32ef93fdc 41 return temperature;
peipei123 0:3fa32ef93fdc 42 }
peipei123 0:3fa32ef93fdc 43
peipei123 0:3fa32ef93fdc 44
peipei123 0:3fa32ef93fdc 45