TI INA219 Library First Commit

Author: root4root

README.md

@@ -1,2 +1,113 @@
 # Root4root_INA219
-Library for Texas Instruments INA219 IC
+
+##### Library for Texas Instruments INA219 IC - Bidirectional Current/Power Monitor
+---
+
+### Quick Example:
+```cpp
+#include <Arduino.h>
+#include "Root4root_INA219.h"
+
+Root4root_INA219 ina219; //0x40 address
+
+void setup() {
+    Serial.begin(9600);
+    ina219.begin();
+}
+
+void loop() {
+    float busvoltage = 0;
+    float current_mA = 0;
+
+    busvoltage = ina219.getBusVoltage_V();
+    current_mA = ina219.getCurrent_mA();
+
+    Serial.println(busvoltage);
+    Serial.println(current_mA);
+
+    delay(1000);
+}
+
+```
+
+### Advanced Usage:
+```cpp
+#include <Arduino.h>
+#include "Root4root_INA219.h"
+
+Root4root_INA219 ina219(0x40);
+
+void setup() {
+
+    //Max expected current 20A with 10 milliOhms shunt,
+    //calculates calibration register value. 2000, 100 by default.
+    ina219.begin(20000, 10);
+
+    //Change configuration register to fit your requirements.
+    //Check Readme for more options, or read .h file
+    ina219.changeConfig(INA219_CONFIG_SHUNT_ADC_RESOLUTION_12BIT_8S_4260US |
+                        INA219_CONFIG_BUS_VOLTAGE_RANGE_16V,
+                        INA219_CONFIG_SHUNT_ADC_RESOLUTION_MASK |
+                        INA219_CONFIG_BUS_VOLTAGE_RANGE_MASK);
+    //Same as above:
+    //ina219.changeConfig(0x0058, 0x2078);
+
+
+    Serial.begin(9600);
+}
+
+void loop() {
+    Serial.println(ina219.getBusVoltage_V());
+    Serial.println(ina219.getCurrent_mA());
+    Serial.println("--------------------");
+
+    //ina219.getBusVoltage_mV();
+    //ina219.getPower_mW();
+    //ina219.getShuntVoltage_mV();
+
+    delay(1000);
+}
+
+```
+
+### Available Methods:
+```cpp
+//Constructor
+Root4root_INA219(uint8_t addr = INA219_ADDRESS, TwoWire *theWire = &Wire);
+
+//DEFAULT_MAX_EXPECTED_CURRENT 2000 mA
+//DEFAULT_SHUNT_RESISTOR 100 mOhm
+void begin(uint16_t expected = DEFAULT_MAX_EXPECTED_CURRENT, uint8_t rshunt = DEFAULT_SHUNT_RESISTOR);
+
+void setCalibration(uint16_t expected, uint8_t rshunt);
+
+void changeConfig(uint16_t value, uint16_t mask); //See header file to findout config and masks constants.
+
+uint16_t getBusVoltage_mV();
+float getBusVoltage_V();
+
+float getShuntVoltage_mV();
+int16_t getShuntVoltage_raw(); //raw, shunt voltage register value
+
+float getCurrent_mA();
+int16_t getCurrent_raw(); //raw, current register value (not in Amps)
+
+float getPower_mW();
+int16_t getPower_raw();  //raw, power register value (not in Watts)
+
+void powerSave(bool on);
+
+void reset();
+
+void trigger(); //For trigged measure mode
+
+//!! Following methods are mainly used for testing purpouses:
+void readRegister(uint8_t reg, uint16_t *value);
+void writeRegister(uint8_t reg, uint16_t value);
+```
+
+### License:
+MIT
+### Author:
+Paul aka root4root \<root4root at gmail dot com><br/>
+**Any comments/suggestions are welcomed.**