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--- the_ledtester_class [2018/08/11 00:25] – created frchris
+++ the_ledtester_class [2018/08/11 01:09] – frchris
@@ Line 1: / Line 1: @@
-hi
+<file java LEDTester.java>
-<file LEDTester.java>
+/**
-hi
+ * This class tests LED by flashing some morse code. 2014 verion by
+ * @author Ian Utting
+ * @author Fabio Heday
+ *
+ * Chris Thiel added the finalize() method to aviod GpioPinExistsException
+ * @version 10 Aug 18
+ */
+public class LEDTester
+{
+    public LED pin1;
+    //unit of time, in milliseconds
+    private final static int UNIT = 200;
+    public static void main(String [] args) {
+        LEDTester lt = new LEDTester();
+        String s = "SOS SOS SOS";
+//        if ( args.length > 0 && args[0] != null && !args[0].equals ("") )
+            s = args[0];
+        lt.flashMorse(s);
+        lt.finalize();
+    }
+    /*
+     * create a new LED instance
+     */
+    public LEDTester() {
+        this(new LED());
+    }
+    /*
+     * Creates a LED instance based on a LED object
+     */
+    public LEDTester(LED p) {
+        pin1 = p;
+    }
+    /*
+     * Flashes the LED 10 times
+     */
+    public void flash10Times() {
+        for(int i = 0; i < 10; i++) {
+            pin1.flash(200);
+            try { Thread.sleep (200); } catch (InterruptedException e) {}
+        }
+    }
+    /*
+     * Sends the morse code using the LED.
+     */
+    public void flashMorse(String msg) {
+        char [] morse = StringToMorse.translate(msg).toCharArray();
+        // . = 1, - = 3, intra-char = 1, inter-char = 3, space = 7.",
+        for (char atom : morse) {
+                if (atom == '.') {
+                    pin1.flash(UNIT);
+                } else if (atom == '-') {
+                    pin1.flash(3*UNIT);
+                } else if (atom == '/') {   // inter-symbol gap
+                    sleep (1);   // plus one leading and one trailing == 3
+                } else {
+                    // must be a space
+                    sleep (5);   // plus one leading and one trailing == 7
+                }
+                sleep (1);   // common gap
+        }
+    }
+    /*
+     * Wait units times the defined unit of time
+     */
+    private void sleep(int units) {
+        try {
+            Thread.sleep(units*UNIT);
+        } catch (InterruptedException e)
+        {
+        }
+    }
+    protected void finalize(){
+        pin1.finalize();
+    }
+}
 </file>