Added support for USB serial port 1200bps touch (Leonardo)

app/src/processing/app/debug/BasicUploader.java

@@ -28,12 +28,18 @@
 
 package processing.app.debug;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import processing.app.Base;
 import processing.app.Preferences;
+import processing.app.Serial;
 import processing.app.SerialException;
 import processing.app.helpers.PreferencesMap;
 import processing.app.helpers.StringReplacer;
 
+import static processing.app.I18n._;
+
 public class BasicUploader extends Uploader  {
 
   public boolean uploadUsingPreferences(String buildPath, String className,
@@ -51,6 +57,92 @@ public class BasicUploader extends Uploader  {
       return uploadUsingProgrammer(buildPath, className);
     }
     
+    // need to do a little dance for Leonardo and derivatives:
+    // open then close the port at the magic baudrate (usually 1200 bps) first
+    // to signal to the sketch that it should reset into bootloader. after doing
+    // this wait a moment for the bootloader to enumerate. On Windows, also must
+    // deal with the fact that the COM port number changes from bootloader to
+    // sketch.
+    String use1200bpsTouch = prefs.get("upload.use_1200bps_touch");
+    boolean doTouch = use1200bpsTouch != null && use1200bpsTouch.equals("true");
+    if (doTouch) {
+      String uploadPort = prefs.get("serial.port");
+      String caterinaUploadPort = null;
+      try {
+        // Toggle 1200 bps on selected serial port to force board reset.
+        List<String> before = Serial.list();
+        if (before.contains(uploadPort)) {
+          if (verbose || Preferences.getBoolean("upload.verbose"))
+            System.out
+                .println(_("Forcing reset using 1200bps open/close on port ") +
+                    uploadPort);
+          Serial.touchPort(uploadPort, 1200);
+
+          // Scanning for available ports seems to open the port or
+          // otherwise assert DTR, which would cancel the WDT reset if
+          // it happened within 250 ms. So we wait until the reset should
+          // have already occured before we start scanning.
+          if (!Base.isMacOS())
+            Thread.sleep(300);
+        }
+        // Wait for a port to appear on the list
+        int elapsed = 0;
+        while (elapsed < 10000) {
+          List<String> now = Serial.list();
+          List<String> diff = new ArrayList<String>(now);
+          diff.removeAll(before);
+          if (verbose || Preferences.getBoolean("upload.verbose")) {
+            System.out.print("PORTS {");
+            for (String p : before)
+              System.out.print(p + ", ");
+            System.out.print("} / {");
+            for (String p : now)
+              System.out.print(p + ", ");
+            System.out.print("} => {");
+            for (String p : diff)
+              System.out.print(p + ", ");
+            System.out.println("}");
+          }
+          if (diff.size() > 0) {
+            caterinaUploadPort = diff.get(0);
+            if (verbose || Preferences.getBoolean("upload.verbose"))
+              System.out.println("Found Leonardo upload port: " +
+                  caterinaUploadPort);
+            break;
+          }
+
+          // Keep track of port that disappears
+          before = now;
+          Thread.sleep(250);
+          elapsed += 250;
+
+          // On Windows, it can take a long time for the port to disappear and
+          // come back, so use a longer time out before assuming that the
+          // selected
+          // port is the bootloader (not the sketch).
+          if (((!Base.isWindows() && elapsed >= 500) || elapsed >= 5000) &&
+              now.contains(uploadPort)) {
+            if (verbose || Preferences.getBoolean("upload.verbose"))
+              System.out
+                  .println("Uploading using selected port: " + uploadPort);
+            caterinaUploadPort = uploadPort;
+            break;
+          }
+        }
+        if (caterinaUploadPort == null)
+          // Something happened while detecting port
+          throw new RunnerException(
+              _("Couldn’t find a Leonardo on the selected port. Check that you have the correct port selected.  If it is correct, try pressing the board's reset button after initiating the upload."));
+
+        uploadPort = caterinaUploadPort;
+      } catch (SerialException e) {
+        throw new RunnerException(e.getMessage());
+      } catch (InterruptedException e) {
+        throw new RunnerException(e.getMessage());
+      }
+      prefs.put("serial.port", uploadPort);
+    }
+    
     prefs.put("build.path", buildPath);
     prefs.put("build.project_name", className);
     if (verbose)
@@ -58,6 +150,7 @@ public class BasicUploader extends Uploader  {
     else
       prefs.put("upload.verbose", prefs.get("upload.params.quiet"));
 
+    boolean uploadResult;
     try {
 //      if (prefs.get("upload.disable_flushing") == null
 //          || prefs.get("upload.disable_flushing").toLowerCase().equals("false")) {
@@ -66,10 +159,29 @@ public class BasicUploader extends Uploader  {
 
       String pattern = prefs.get("upload.pattern");
       String[] cmd = StringReplacer.formatAndSplit(pattern, prefs, true);
-      return executeUploadCommand(cmd);
+      uploadResult = executeUploadCommand(cmd);
     } catch (Exception e) {
       throw new RunnerException(e);
     }
+    
+    // For Leonardo wait until the bootloader serial port disconnects and the
+    // sketch serial port reconnects (or timeout after a few seconds if the
+    // sketch port never comes back). Doing this saves users from accidentally
+    // opening Serial Monitor on the soon-to-be-orphaned bootloader port.
+    try {
+      if (uploadResult && doTouch) {
+        Thread.sleep(500);
+        long timeout = System.currentTimeMillis() + 2000;
+        while (timeout > System.currentTimeMillis()) {
+          List<String> portList = Serial.list();
+          if (portList.contains(Preferences.get("serial.port")))
+            break;
+          Thread.sleep(100);
+        }
+      }
+    } catch (InterruptedException ex) {
+    }
+    return uploadResult;
   }
 
   public boolean uploadUsingProgrammer(String buildPath, String className)