Moved libraries folder inside platform folder. Now libraries and examples are searched per board/platform

1 files changed, 220 insertions, 0 deletions

diff --git a/libraries/Stepper/Stepper.cpp b/libraries/Stepper/Stepper.cpp
new file mode 100644
index 0000000..5d6b5e5
--- /dev/null
+++ b/libraries/Stepper/Stepper.cpp
@@ -0,0 +1,220 @@
+/*
+  Stepper.cpp - - Stepper library for Wiring/Arduino - Version 0.4
+  
+  Original library     (0.1) by Tom Igoe.
+  Two-wire modifications   (0.2) by Sebastian Gassner
+  Combination version   (0.3) by Tom Igoe and David Mellis
+  Bug fix for four-wire   (0.4) by Tom Igoe, bug fix from Noah Shibley  
+
+  Drives a unipolar or bipolar stepper motor using  2 wires or 4 wires
+
+  When wiring multiple stepper motors to a microcontroller,
+  you quickly run out of output pins, with each motor requiring 4 connections. 
+
+  By making use of the fact that at any time two of the four motor
+  coils are the inverse  of the other two, the number of
+  control connections can be reduced from 4 to 2. 
+
+  A slightly modified circuit around a Darlington transistor array or an L293 H-bridge
+  connects to only 2 microcontroler pins, inverts the signals received,
+  and delivers the 4 (2 plus 2 inverted ones) output signals required
+  for driving a stepper motor.
+
+  The sequence of control signals for 4 control wires is as follows:
+
+  Step C0 C1 C2 C3
+     1  1  0  1  0
+     2  0  1  1  0
+     3  0  1  0  1
+     4  1  0  0  1
+
+  The sequence of controls signals for 2 control wires is as follows
+  (columns C1 and C2 from above):
+
+  Step C0 C1
+     1  0  1
+     2  1  1
+     3  1  0
+     4  0  0
+
+  The circuits can be found at 
+ 
+http://www.arduino.cc/en/Tutorial/Stepper
+ 
+ 
+ */
+
+
+#include "Arduino.h"
+#include "Stepper.h"
+
+/*
+ * two-wire constructor.
+ * Sets which wires should control the motor.
+ */
+Stepper::Stepper(int number_of_steps, int motor_pin_1, int motor_pin_2)
+{
+  this->step_number = 0;      // which step the motor is on
+  this->speed = 0;        // the motor speed, in revolutions per minute
+  this->direction = 0;      // motor direction
+  this->last_step_time = 0;    // time stamp in ms of the last step taken
+  this->number_of_steps = number_of_steps;    // total number of steps for this motor
+  
+  // Arduino pins for the motor control connection:
+  this->motor_pin_1 = motor_pin_1;
+  this->motor_pin_2 = motor_pin_2;
+
+  // setup the pins on the microcontroller:
+  pinMode(this->motor_pin_1, OUTPUT);
+  pinMode(this->motor_pin_2, OUTPUT);
+  
+  // When there are only 2 pins, set the other two to 0:
+  this->motor_pin_3 = 0;
+  this->motor_pin_4 = 0;
+  
+  // pin_count is used by the stepMotor() method:
+  this->pin_count = 2;
+}
+
+
+/*
+ *   constructor for four-pin version
+ *   Sets which wires should control the motor.
+ */
+
+Stepper::Stepper(int number_of_steps, int motor_pin_1, int motor_pin_2, int motor_pin_3, int motor_pin_4)
+{
+  this->step_number = 0;      // which step the motor is on
+  this->speed = 0;        // the motor speed, in revolutions per minute
+  this->direction = 0;      // motor direction
+  this->last_step_time = 0;    // time stamp in ms of the last step taken
+  this->number_of_steps = number_of_steps;    // total number of steps for this motor
+  
+  // Arduino pins for the motor control connection:
+  this->motor_pin_1 = motor_pin_1;
+  this->motor_pin_2 = motor_pin_2;
+  this->motor_pin_3 = motor_pin_3;
+  this->motor_pin_4 = motor_pin_4;
+
+  // setup the pins on the microcontroller:
+  pinMode(this->motor_pin_1, OUTPUT);
+  pinMode(this->motor_pin_2, OUTPUT);
+  pinMode(this->motor_pin_3, OUTPUT);
+  pinMode(this->motor_pin_4, OUTPUT);
+
+  // pin_count is used by the stepMotor() method:  
+  this->pin_count = 4;  
+}
+
+/*
+  Sets the speed in revs per minute
+
+*/
+void Stepper::setSpeed(long whatSpeed)
+{
+  this->step_delay = 60L * 1000L / this->number_of_steps / whatSpeed;
+}
+
+/*
+  Moves the motor steps_to_move steps.  If the number is negative, 
+   the motor moves in the reverse direction.
+ */
+void Stepper::step(int steps_to_move)
+{  
+  int steps_left = abs(steps_to_move);  // how many steps to take
+  
+  // determine direction based on whether steps_to_mode is + or -:
+  if (steps_to_move > 0) {this->direction = 1;}
+  if (steps_to_move < 0) {this->direction = 0;}
+    
+    
+  // decrement the number of steps, moving one step each time:
+  while(steps_left > 0) {
+  // move only if the appropriate delay has passed:
+  if (millis() - this->last_step_time >= this->step_delay) {
+      // get the timeStamp of when you stepped:
+      this->last_step_time = millis();
+      // increment or decrement the step number,
+      // depending on direction:
+      if (this->direction == 1) {
+        this->step_number++;
+        if (this->step_number == this->number_of_steps) {
+          this->step_number = 0;
+        }
+      } 
+      else { 
+        if (this->step_number == 0) {
+          this->step_number = this->number_of_steps;
+        }
+        this->step_number--;
+      }
+      // decrement the steps left:
+      steps_left--;
+      // step the motor to step number 0, 1, 2, or 3:
+      stepMotor(this->step_number % 4);
+    }
+  }
+}
+
+/*
+ * Moves the motor forward or backwards.
+ */
+void Stepper::stepMotor(int thisStep)
+{
+  if (this->pin_count == 2) {
+    switch (thisStep) {
+      case 0: /* 01 */
+      digitalWrite(motor_pin_1, LOW);
+      digitalWrite(motor_pin_2, HIGH);
+      break;
+      case 1: /* 11 */
+      digitalWrite(motor_pin_1, HIGH);
+      digitalWrite(motor_pin_2, HIGH);
+      break;
+      case 2: /* 10 */
+      digitalWrite(motor_pin_1, HIGH);
+      digitalWrite(motor_pin_2, LOW);
+      break;
+      case 3: /* 00 */
+      digitalWrite(motor_pin_1, LOW);
+      digitalWrite(motor_pin_2, LOW);
+      break;
+    } 
+  }
+  if (this->pin_count == 4) {
+    switch (thisStep) {
+      case 0:    // 1010
+      digitalWrite(motor_pin_1, HIGH);
+      digitalWrite(motor_pin_2, LOW);
+      digitalWrite(motor_pin_3, HIGH);
+      digitalWrite(motor_pin_4, LOW);
+      break;
+      case 1:    // 0110
+      digitalWrite(motor_pin_1, LOW);
+      digitalWrite(motor_pin_2, HIGH);
+      digitalWrite(motor_pin_3, HIGH);
+      digitalWrite(motor_pin_4, LOW);
+      break;
+      case 2:    //0101
+      digitalWrite(motor_pin_1, LOW);
+      digitalWrite(motor_pin_2, HIGH);
+      digitalWrite(motor_pin_3, LOW);
+      digitalWrite(motor_pin_4, HIGH);
+      break;
+      case 3:    //1001
+      digitalWrite(motor_pin_1, HIGH);
+      digitalWrite(motor_pin_2, LOW);
+      digitalWrite(motor_pin_3, LOW);
+      digitalWrite(motor_pin_4, HIGH);
+      break;
+    } 
+  }
+}
+
+/*
+  version() returns the version of the library:
+*/
+int Stepper::version(void)
+{
+  return 4;
+}