add constructor taking mV per Amp to current sense

Author: Richard Unger

src/current_sense/InlineCurrentSense.cpp

@@ -17,7 +17,22 @@ InlineCurrentSense::InlineCurrentSense(float _shunt_resistor, float _gain, int _
     gain_a = volts_to_amps_ratio;
     gain_b = volts_to_amps_ratio;
     gain_c = volts_to_amps_ratio;
-}
+};
+
+
+InlineCurrentSense::InlineCurrentSense(float _mVpA, int _pinA, int _pinB, int _pinC){
+    pinA = _pinA;
+    pinB = _pinB;
+    pinC = _pinC;
+
+    volts_to_amps_ratio = _mVpA / 1000.0f; // mV to amps
+    // gains for each phase
+    gain_a = volts_to_amps_ratio;
+    gain_b = volts_to_amps_ratio;
+    gain_c = volts_to_amps_ratio;
+};
+
+
 
 // Inline sensor init function
 int InlineCurrentSense::init(){

src/current_sense/InlineCurrentSense.h

@@ -21,6 +21,14 @@ class InlineCurrentSense: public CurrentSense{
       @param phC C phase adc pin (optional)
     */
     InlineCurrentSense(float shunt_resistor, float gain, int pinA, int pinB, int pinC = NOT_SET);
+    /**
+      InlineCurrentSense class constructor
+      @param mVpA mV per Amp ratio
+      @param phA A phase adc pin
+      @param phB B phase adc pin
+      @param phC C phase adc pin (optional)
+    */
+    InlineCurrentSense(float mVpA, int pinA, int pinB, int pinC = NOT_SET);
 
     // CurrentSense interface implementing functions 
     int init() override;

src/current_sense/LowsideCurrentSense.cpp

@@ -19,6 +19,20 @@ LowsideCurrentSense::LowsideCurrentSense(float _shunt_resistor, float _gain, int
     gain_c = volts_to_amps_ratio;
 }
 
+
+LowsideCurrentSense::LowsideCurrentSense(float _mVpA, int _pinA, int _pinB, int _pinC){
+    pinA = _pinA;
+    pinB = _pinB;
+    pinC = _pinC;
+
+    volts_to_amps_ratio = _mVpA / 1000.0f; // mV to amps
+    // gains for each phase
+    gain_a = volts_to_amps_ratio;
+    gain_b = volts_to_amps_ratio;
+    gain_c = volts_to_amps_ratio;
+}   
+
+
 // Lowside sensor init function
 int LowsideCurrentSense::init(){
     // configure ADC variables

src/current_sense/LowsideCurrentSense.h

@@ -22,6 +22,14 @@ class LowsideCurrentSense: public CurrentSense{
       @param phC C phase adc pin (optional)
     */
     LowsideCurrentSense(float shunt_resistor, float gain, int pinA, int pinB, int pinC = _NC);
+    /**
+      LowsideCurrentSense class constructor
+      @param mVpA mV per Amp ratio
+      @param phA A phase adc pin
+      @param phB B phase adc pin
+      @param phC C phase adc pin (optional)
+    */
+    LowsideCurrentSense(float mVpA, int pinA, int pinB, int pinC = _NC);
 
     // CurrentSense interface implementing functions
     int init() override;