Merge pull request #194 from VVESTM/fs90r

Add fs90r example to servo library

Author: fpistm

libraries/Servo/examples/fs90r/fs90r.ino

@@ -0,0 +1,36 @@
+/*
+ Use servo library to control a FS90R motor
+
+ Motor information : 
+   http://www.feetechrc.com/product/analog-servo/micro-1-3kg-cm-360-degree-continuous-rotation-servo-fs90r/
+   Must respect the pulse range in order not to damage servo.
+   
+*/
+
+#include <Servo.h>
+
+Servo fs90r;  // create servo object to control a servo
+
+int potpin = 0;   // analog pin used to connect the potentiometer
+int val;          // variable to read the value from the analog pin
+int servopin = 9; // pin used to connect the servo
+
+void setup() {
+  Serial.begin(115200);
+
+  fs90r.attach(servopin, 900, 2100); // attaches the servo on pin 9 to the servo object
+                                     // Be carefull to min and max values...
+}
+
+void loop() {
+  val = analogRead(potpin);        // reads the value of the potentiometer (value between 0 and 1023)
+  val = map(val, 0, 1023, 0, 180); // scale it to use it with the servo (value between 0 and 180, at 90, 
+                                   // motor is stopped)
+
+  Serial.print("val = ");
+  Serial.println(val);
+
+  fs90r.write(val);                // sets the servo speed according to the scaled value
+  delay(15);
+}
+