Merge pull request #32 from hoffmannjan/master

power save mode support added

Adafruit_INA219.cpp

@@ -151,6 +151,24 @@ void Adafruit_INA219::setCalibration_32V_2A() {
   wireWriteRegister(INA219_REG_CONFIG, config);
 }
 
+/*!
+ *  @brief  Set power save mode according to parameters
+ *  @param  on
+ *          boolean value
+ */
+void Adafruit_INA219::powerSave(bool on) {
+  uint16_t current;
+  wireReadRegister(INA219_REG_CONFIG, &current);
+  uint8_t next;
+  if (on) {
+    next = current | INA219_CONFIG_MODE_POWERDOWN; 
+  } else {
+    next = current & ~INA219_CONFIG_MODE_POWERDOWN; 
+  }
+  wireWriteRegister(INA219_REG_CONFIG, next);
+}
+
+
 /*!
  *  @brief  Configures to INA219 to be able to measure up to 32V and 1A
  *          of current.  Each unit of current corresponds to 40uA, and each

Adafruit_INA219.h

@@ -131,13 +131,14 @@ class Adafruit_INA219 {
 public:
   Adafruit_INA219(uint8_t addr = INA219_ADDRESS);
   void begin(TwoWire *theWire = &Wire);
-  void setCalibration_32V_2A(void);
-  void setCalibration_32V_1A(void);
-  void setCalibration_16V_400mA(void);
-  float getBusVoltage_V(void);
-  float getShuntVoltage_mV(void);
-  float getCurrent_mA(void);
-  float getPower_mW(void);
+  void setCalibration_32V_2A();
+  void setCalibration_32V_1A();
+  void setCalibration_16V_400mA();
+  float getBusVoltage_V();
+  float getShuntVoltage_mV();
+  float getCurrent_mA();
+  float getPower_mW();
+  void powerSave(bool on);
 
 private:
   TwoWire *_i2c;
@@ -152,10 +153,10 @@ class Adafruit_INA219 {
   void init();
   void wireWriteRegister(uint8_t reg, uint16_t value);
   void wireReadRegister(uint8_t reg, uint16_t *value);
-  int16_t getBusVoltage_raw(void);
-  int16_t getShuntVoltage_raw(void);
-  int16_t getCurrent_raw(void);
-  int16_t getPower_raw(void);
+  int16_t getBusVoltage_raw();
+  int16_t getShuntVoltage_raw();
+  int16_t getCurrent_raw();
+  int16_t getPower_raw();
 };
 
 #endif