MCP9808.h

00001 #ifndef MPC9808_H
00002 #define MPC9808_H
00003 
00004 #include "mbed.h"
00005 
00006 /** MCP9808 class.
00007  *  Used for read MCP9808 ±0.5°C Maximum Accuracy Digital Temperature Sensor
00008  *
00009  * Example:
00010  * @code
00011  *#include "mbed.h"
00012  *#include "MCP9808.h"
00013  *
00014  *DigitalOut myled(LED1);
00015  *I2C i2cBus(D14,D15);
00016  *MCP9808 therm(&i2cBus, true, true, true);
00017  *
00018  *int main() 
00019  *{
00020  *   while(1) 
00021  *   {
00022  *       myled = !myled; // Toggle LED
00023  *       wait(0.2); // 200 ms
00024  *       printf("Temperature=%03.6f*C\r\n",therm.getTemp());
00025  *   }
00026  *}
00027  * @endcode
00028  */  
00029 class MCP9808
00030 {
00031     public:
00032         /** Create MCP9808 instance connected to I2C bus
00033         * @param *i2c I2C bus already initialized
00034         * @param a0 bool indicate a0 pin state to compute I2C address
00035         * @param a1 bool indicate a1 pin state to compute I2C address
00036         * @param a2 bool indicate a2 pin state to compute I2C address
00037         */
00038         MCP9808(I2C *i2c, bool a0=false, bool a1=false, bool a2=false);
00039         
00040         /**Get MCP9808 abient temperature
00041         * @returns temperature [°C]
00042         */    
00043         float getTemp(void);
00044         
00045 #ifdef MBED_OPERATORS
00046     /** An operator shorthand for getTemp()
00047      *
00048      * The float() operator can be used as a shorthand for getTemp() to simplify common code sequences
00049      *
00050      * Example:
00051      * @code
00052      * float x = therm.getTemp();
00053      * float x = therm;
00054      *
00055      * if(therm.getTemp() > 20.25) { ... }
00056      * if(therm > 20.25) { ... }
00057      * @endcode
00058      */
00059     operator float(){return getTemp();}
00060 #endif
00061               
00062     private:
00063         I2C *_i2c;
00064         int _addr;
00065 };
00066 
00067 #endif