Added min/max parameters to potentiometer

examples/OneOfEverything/OneOfEverything.ino

@@ -46,6 +46,9 @@ DcsBios::RotaryEncoder rotaryEncoderExample("MSG_0", "ARG_DEC", "ARG_INC", 1, 2)
 DcsBios::RotaryAcceleratedEncoder rotaryAcceleratedEncoderExample("MSG_0", "ARG_DEC", "ARG_INC", "FAST_INC", "FAST_DEC", 1, 2);
 // A linear/analog axis on a single pin
 DcsBios::Potentiometer potentiometerExample("MSG_0", 1);
+// A linear axis control where the physical or electrical range of the input does utilize the full 0 to 1023 range.
+DcsBios::Potentiometer clippedPotentiometerExample("MSG_0", false, 256, 768);
+
 // An inverted version of a linear axis control
 DcsBios::Potentiometer invertedPotentiometerExample("MSG_0", 1, true);
 

releasenotes.md

@@ -1,3 +1,6 @@
+## vNext
+- Added input_min and input_max optional parameters to PotentiometerEWMA to allow a user to calibrate their analog inputs if their physical control does not utilize the full range available to the controller.
+
 ## v0.3.7
 - Integrate 2 and 3 position Matrix switches, thanks to Dehuman for the starting point!
 - Fix STM32 compilation issue.  Confirmed working on Bluepill and SparkFun.

src/internal/Potentiometers.h

@@ -17,9 +17,10 @@ namespace DcsBios {
 			void pollInput() {
 				unsigned int state; 
 				if (reverse_)
-					state = map(analogRead(pin_), 0, 1023, 65535, 0);
+					state = map(analogRead(pin_), input_min_, input_max_, 65535, 0);
 				else
-					state = map(analogRead(pin_), 0, 1023, 0, 65535);
+					state = map(analogRead(pin_), input_min_, input_max_, 0, 65535);
+
 				accumulator += ((float)state - accumulator) / (float)ewma_divisor;
 				state = (unsigned int)accumulator;
 
@@ -40,18 +41,23 @@ namespace DcsBios {
 			unsigned int lastState_;
 			float accumulator;
 			bool reverse_;
+			unsigned int input_min_;
+			unsigned int input_max_;
 
 		public:
-			PotentiometerEWMA(const char* msg, char pin, bool reverse = false) :
+			PotentiometerEWMA(const char* msg, char pin, bool reverse = false, unsigned int input_min = 0, unsigned int input_max = 1023) :
 				PollingInput(pollIntervalMs) {
 				msg_ = msg;
 				pin_ = pin;
 				reverse_ = reverse;
+				input_min_ = input_min;
+				input_max_ = input_max;
+
 				pinMode(pin_, INPUT);
 				if (reverse_)
-					lastState_ = map(analogRead(pin_), 0, 1023, 65535, 0);
+					lastState_ = map(analogRead(pin_), input_min_, input_max_, 65535, 0);
 				else
-					lastState_ = map(analogRead(pin_), 0, 1023, 0, 65535);
+					lastState_ = map(analogRead(pin_), input_min_, input_max_, 0, 65535);
 			}
 
 			void SetControl( const char* msg )
@@ -64,6 +70,7 @@ namespace DcsBios {
 				this->resetState();
 			}
 	};
+
 	typedef PotentiometerEWMA<> Potentiometer;
 }