Added arduino libs

libraries/Cytron_Motor_Drivers_Library/CytronMotorDriver.cpp

@@ -0,0 +1,47 @@
+#include "CytronMotorDriver.h"
+
+CytronMD::CytronMD(MODE mode, uint8_t pin1, uint8_t pin2)
+{
+  _mode = mode;
+  _pin1 = pin1;
+  _pin2 = pin2;
+  
+  pinMode(_pin1, OUTPUT);
+  pinMode(_pin2, OUTPUT);
+  
+  digitalWrite(_pin1, LOW);
+  digitalWrite(_pin2, LOW);
+}
+
+void CytronMD::setSpeed(int16_t speed)
+{
+  // Make sure the speed is within the limit.
+  if (speed > 255) {
+    speed = 255;
+  } else if (speed < -255) {
+    speed = -255;
+  }
+  
+  // Set the speed and direction.
+  switch (_mode) {
+    case PWM_DIR:
+      if (speed >= 0) {
+        analogWrite(_pin1, speed);
+        digitalWrite(_pin2, LOW);
+      } else {
+        analogWrite(_pin1, -speed);
+        digitalWrite(_pin2, HIGH);
+      }
+      break;
+      
+    case PWM_PWM:
+      if (speed >= 0) {
+        analogWrite(_pin1, speed);
+        analogWrite(_pin2, 0);
+      } else {
+        analogWrite(_pin1, 0);
+        analogWrite(_pin2, -speed);
+      }
+      break;
+  }
+}