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digistump-avr/libraries/DigisparkSoftRcPulseOut/examples/SweepNoDelay/SweepNoDelay.ino

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+// SweepNoDelay
+// by RC Navy (http://p.loussouarn.free.fr/arduino/arduino.html>)
+// This sketch can work with ATtiny and Arduino UNO, MEGA, etc...
+// This example code is in the public domain.
+
+#include <SoftRcPulseOut.h> 
+ 
+SoftRcPulseOut myservo;  // create servo object to control a servo 
+                        // a maximum of eight servo objects can be created 
+#define SERVO_PIN         0
+
+#define UP_DIRECTION      +1
+#define DOWN_DIRECTION    -1
+
+#define POS_MIN           0
+#define POS_MAX           180
+
+int pos = POS_MIN;    // variable to store the servo position 
+int step = UP_DIRECTION;
+
+void setup() 
+{ 
+  myservo.attach(SERVO_PIN);  // attaches the servo on pin defined by SERVO_PIN to the servo object 
+  myservo.write(pos);
+} 
+ 
+void loop() 
+{
+  if (SoftRcPulseOut::refresh())    // refresh() returns 1 every 20ms (after pulse update)
+  {
+    // We arrive here every 20ms
+    pos += step;
+    if(pos >= POS_MAX) step = DOWN_DIRECTION; //180 degrees reached -> Change direction
+    if(pos <= POS_MIN) step = UP_DIRECTION;   //  0 degrees reached -> Change direction
+    myservo.write(pos);
+  }
+}