version 1.0.3. Added a method to reverse the movement. Example with 2…

… servo

README.md

@@ -101,6 +101,10 @@ Set the initial position of the servo. The position is a floating point number
 ranging from 0.0 to 1.0. If the value is greater than 1.0, ti is reset to 1.0
 and if lower than 0.0, it is reset to 0.0
 
+### setReverted(reverted)
+
+Reverse the movement. By default reverted is false. If set to true, the trajectories are mirrored across an axis at time = 0.5.
+
 ### goTo(position)
 
 Go to the specified position by following the trajectory.

changelog.txt

@@ -1,6 +1,7 @@
 +---------------------------------------------------------------------------+
 | SlowMotionServo changelog                                                 |
 +---------------------------------------------------------------------------+
+1.0.3   Added a method to do a mirror at time = .5
 1.0.2   Default min and max have been changed to 1000 and 2000.
         More accurate SMSSmoothBounce trajectory.
 				Fixed a problem with the initial position.

examples/PushButton/PushButton.ino

@@ -27,6 +27,7 @@ void setup()
   myServo.setMin(800);
   myServo.setMax(2200);
   myServo.setSpeed(1.5);
+  myServo.setReverted(true);
   myServo.setInitialPosition(0.0);
   myServo.setPin(servoPin);
   digitalWrite(ledPin, HIGH);

examples/PushButton2Servos/PushButton2Servos.ino

@@ -0,0 +1,68 @@
+/*
+ * Drive a servo by using a push button
+ * Uses the Bounce2 library. This library can be installed using the library manager
+ */
+
+#include <Servo.h>
+#include <SlowMotionServo.h>
+#include <Bounce2.h>
+
+SMSSmoothBounce myServoRight;
+SMSSmoothBounce myServoLeft;
+Bounce myButton;
+
+const byte servoRightPin = 4;
+const byte servoLeftPin = 3;
+const byte buttonPin = 5;
+const byte ledPin = 13;
+
+void setup()
+{
+  pinMode(ledPin, OUTPUT);
+  /* when the button is pressed, the input is LOW */
+  pinMode(buttonPin, INPUT_PULLUP);
+
+  myButton.attach(buttonPin);
+  /* scan interval for debounce */
+  myButton.interval(5);
+
+  myServoRight.setMin(750);
+  myServoRight.setMax(1800);
+  myServoLeft.setMin(1100);
+  myServoLeft.setMax(2200);
+
+  myServoRight.setSpeed(1.5);
+  myServoLeft.setSpeed(1.5);
+
+  myServoLeft.setReverted(true);
+
+  myServoRight.setInitialPosition(0.0);
+  myServoLeft.setInitialPosition(0.0);
+  myServoRight.setPin(servoRightPin);
+  myServoLeft.setPin(servoLeftPin);
+  digitalWrite(ledPin, HIGH);
+}
+
+void loop()
+{
+  static float servoTarget = 0.0;
+
+  /* update the state of the button */
+  myButton.update();
+  /* update the position of the servo */
+  SlowMotionServo::update();
+
+  if (myServoRight.isStopped() && myServoLeft.isStopped()) {
+    digitalWrite(ledPin, LOW);
+    if (myButton.fell()) {
+      /* look at the button only when the servo is stopped */
+      /* change the target */
+      servoTarget = 1.0 - servoTarget;
+      /* set the new target for the servo */
+      myServoRight.goTo(servoTarget);
+      myServoLeft.goTo(servoTarget);
+      digitalWrite(ledPin, HIGH);
+    }
+  }
+}
+

keywords.txt

@@ -18,6 +18,7 @@ SlowMotionServo 	KEYWORD1
 setMin					KEYWORD2
 setMax					KEYWORD2
 setMinMax				KEYWORD2
+setReverted     KEYWORD2
 setPin					KEYWORD2
 setMinToMaxSpeed			KEYWORD2
 setMaxToMinSpeed			KEYWORD2
@@ -36,4 +37,3 @@ update					KEYWORD2
 ################################################
 # Constants (LITERAL1)
 ################################################
-

library.properties

@@ -1,5 +1,5 @@
 name=SlowMotionServo
-version=1.0.2
+version=1.0.3
 author=Jean-Luc - Locoduino
 maintainer=Jean-Luc - Locoduino
 sentence=This library allows to move multiple servos slowly.

src/SlowMotionServo.cpp

@@ -56,6 +56,7 @@ SlowMotionServo::SlowMotionServo() :
   mState(SERVO_INIT),
   mDetachAtMin(false),
   mDetachAtMax(false),
+  mReverted(false),
   mMinPulse(1000),
   mMaxPulse(2000),
   mInitialRelativeTime(0.0),
@@ -110,6 +111,14 @@ void SlowMotionServo::updatePulseAccordingToMinMax()
   writeMicroseconds(currentPosition);
 }
 
+/*
+ * Revert the pulse (mirror at time = .5)
+ */
+unsigned int SlowMotionServo::normalizePos(const unsigned int inPos)
+{
+  return mReverted ? map(inPos, mMinPulse, mMaxPulse, mMaxPulse, mMinPulse) : inPos;
+}
+
 /*
  * Change the min and max. Constrain both. Check min <= max.
  * If not min and max are sit to the average of both.
@@ -196,7 +205,7 @@ void SlowMotionServo::updatePosition()
   switch (mState) {
     case SERVO_INIT:
     	position = slopeUp(mCurrentRelativeTime);
-      writeMicroseconds(position * (mMaxPulse - mMinPulse) + mMinPulse);
+      writeMicroseconds(normalizePos(position * (mMaxPulse - mMinPulse) + mMinPulse));
       mState = SERVO_STOPPED;
       break;
     case SERVO_UP:
@@ -207,7 +216,7 @@ void SlowMotionServo::updatePosition()
         mState = SERVO_DELAYED_UP;
       }
       position = slopeUp(mCurrentRelativeTime);
-      writeMicroseconds(position * (mMaxPulse - mMinPulse) + mMinPulse);
+      writeMicroseconds(normalizePos(position * (mMaxPulse - mMinPulse) + mMinPulse));
       break;
     case SERVO_DOWN:
       mCurrentRelativeTime = mInitialRelativeTime -
@@ -217,7 +226,7 @@ void SlowMotionServo::updatePosition()
         mState = SERVO_DELAYED_DOWN;
       }
       position = slopeDown(mCurrentRelativeTime);
-      writeMicroseconds(position * (mMaxPulse - mMinPulse) + mMinPulse);
+      writeMicroseconds(normalizePos(position * (mMaxPulse - mMinPulse) + mMinPulse));
       break;
     case SERVO_DELAYED_UP:
       if ((millis() - mStartTime) > sDelayUntilStop) {

src/SlowMotionServo.h

@@ -29,6 +29,7 @@ class SlowMotionServo : public Servo
   byte mState:3;              // state of the servo
   bool mDetachAtMin:1;
   bool mDetachAtMax:1;
+  bool mReverted:1;
   unsigned int mMinPulse;     // minimum position of the servo in microseconds
   unsigned int mMaxPulse;     // maximum position of the servo in microseconds
   unsigned long mStartTime;   // time when the movement begin
@@ -44,17 +45,19 @@ class SlowMotionServo : public Servo
 
   void updatePosition();      // update the position of the servo
   void updatePulseAccordingToMinMax();
-
+  unsigned int normalizePos(const unsigned int inPos);
+
 public:
   SlowMotionServo();
   SlowMotionServo(byte pin);
-  void setPin(byte pin) { mPin = pin; }
+  void setPin(const byte pin) { mPin = pin; }
   void setMinMax(unsigned int minPulse, unsigned int maxPulse);
   void setMin(unsigned int minPulse);
   void setMax(unsigned int maxPulse);
-  void setMinToMaxSpeed(float speed) { mTimeFactorUp = speed / 10000.0; }
-  void setMaxToMinSpeed(float speed) { mTimeFactorDown = speed / 10000.0; }
-  void setSpeed(float speed) { mTimeFactorUp = mTimeFactorDown = speed / 10000.0; }
+  void setReverted(const bool inReverted) { mReverted = inReverted; }
+  void setMinToMaxSpeed(const float speed) { mTimeFactorUp = speed / 10000.0; }
+  void setMaxToMinSpeed(const float speed) { mTimeFactorDown = speed / 10000.0; }
+  void setSpeed(const float speed) { mTimeFactorUp = mTimeFactorDown = speed / 10000.0; }
   void setInitialPosition(float position);
   void setDetachAtMin(bool detach) { mDetachAtMin = detach; }
   void setDetachAtMax(bool detach) { mDetachAtMax = detach; }