IOIO: added working analogInput example

Author: chrisws

ioio/samples/slider-pot.bas

@@ -8,7 +8,7 @@ print "ready!!!"
 
 while 1
   print analogIn.read()
-  delay 100
+  delay 10
 wend
 
 print "done"

ioio/src/main/java/ioio/lib/pc/PausedInputStream.java

@@ -8,8 +8,11 @@
  * Pause between read() to avoid excessive CPU usage
  */
 class PausedInputStream extends BufferedInputStream {
+  private long lastAccessMillis;
+
   public PausedInputStream(InputStream inputStream) {
     super(inputStream);
+    lastAccessMillis = System.currentTimeMillis();
   }
 
   @Override
@@ -32,7 +35,7 @@ public synchronized int read() throws IOException {
 
   private void pause() throws IOException {
     try {
-      Thread.sleep(10);
+      lastAccessMillis = Timer.tick(lastAccessMillis);
     } catch (InterruptedException e) {
       throw new IOException(e);
     }

ioio/src/main/java/ioio/lib/pc/Timer.java

@@ -0,0 +1,19 @@
+package ioio.lib.pc;
+
+import java.io.IOException;
+
+public class Timer {
+  private static final int RATE_MILLIS = 50;
+
+  private Timer() {
+    // no access
+  }
+
+  public static long tick(long lastAccessMillis) throws InterruptedException {
+    long interval = System.currentTimeMillis() - lastAccessMillis;
+    if (interval < RATE_MILLIS) {
+      Thread.sleep(RATE_MILLIS - interval);
+    }
+    return System.currentTimeMillis();
+  }
+}

ioio/src/main/java/net/sourceforge/smallbasic/ioio/IOService.java

@@ -6,6 +6,7 @@
 
 import ioio.lib.api.IOIO;
 import ioio.lib.api.exception.ConnectionLostException;
+import ioio.lib.pc.Timer;
 import ioio.lib.spi.Log;
 import ioio.lib.util.IOIOLooper;
 import ioio.lib.util.IOIOLooperProvider;
@@ -69,6 +70,7 @@ private void registerPin(int pin) throws IOException {
 
   public class IOServiceLooper implements IOIOLooper {
     public IOIO ioio;
+    private long lastAccessMillis;
 
     @Override
     public void disconnected() {
@@ -88,7 +90,7 @@ public void incompatible(IOIO ioio) {
 
     @Override
     public void loop() throws ConnectionLostException, InterruptedException {
-      Thread.sleep(10);
+      lastAccessMillis = Timer.tick(lastAccessMillis);
       for (IOTask next: ioTasks) {
         next.loop();
       }
@@ -97,6 +99,7 @@ public void loop() throws ConnectionLostException, InterruptedException {
     @Override
     public void setup(IOIO ioio) {
       this.ioio = ioio;
+      this.lastAccessMillis = System.currentTimeMillis();
       for (IOTask next: ioTasks) {
         next.setup(ioio);
       }