INA219.h

00001 #pragma once 
00002 
00003 #include "mbed.h"
00004 
00005 /* Supply measurement chip (TI INA 219)
00006    http://www.ti.com/product/ina219
00007    
00008    The INA219 is a high-side current shunt and power monitor 
00009    with an I2C interface. The INA219 monitors both shunt drop
00010    and supply voltage, with programmable conversion times and 
00011    filtering. A programmable calibration value, combined with 
00012    an internal multiplier, enables direct readouts in amperes. 
00013    An additional multiplying register calculates power in watts. 
00014    The I2C interface features 16 programmable addresse
00015 */
00016 class INA219
00017 {
00018 public: 
00019     INA219(PinName sda, PinName scl, 
00020             unsigned char adr /* range 0x80(1000000)-0x9E(1001111) */);
00021     bool detect(void);
00022     double getCurrent(void);
00023     double getVoltage(void);
00024 protected:
00025     bool _det;
00026     unsigned char _adr;
00027     I2C _i2c;
00028 };