Auto restart after upload (linux only for now). Auto reset/erase when uploading a new sketch.

app/src/processing/app/Serial.java

@@ -105,9 +105,10 @@ public class Serial implements SerialPortEventListener {
     SerialPort port;
     boolean result = false;
     try {
-      Enumeration portList = CommPortIdentifier.getPortIdentifiers();
+      @SuppressWarnings("unchecked")
+      Enumeration<CommPortIdentifier> portList = CommPortIdentifier.getPortIdentifiers();
       while (portList.hasMoreElements()) {
-        CommPortIdentifier portId = (CommPortIdentifier) portList.nextElement();
+        CommPortIdentifier portId = portList.nextElement();
         if ((CommPortIdentifier.PORT_SERIAL == portId.getPortType()) && (portId.getName().equals(iname))) {
           port = (SerialPort) portId.open("tap", 2000);
           port.setSerialPortParams(irate, 8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
@@ -148,10 +149,10 @@ public class Serial implements SerialPortEventListener {
 
     try {
       port = null;
-      Enumeration portList = CommPortIdentifier.getPortIdentifiers();
+      @SuppressWarnings("unchecked")
+      Enumeration<CommPortIdentifier> portList = CommPortIdentifier.getPortIdentifiers();
       while (portList.hasMoreElements()) {
-        CommPortIdentifier portId =
-          (CommPortIdentifier) portList.nextElement();
+        CommPortIdentifier portId = portList.nextElement();
 
         if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
           //System.out.println("found " + portId.getName());

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

@@ -67,7 +67,7 @@ public class BasicUploader extends Uploader  {
     boolean doTouch = use1200bpsTouch != null && use1200bpsTouch.equals("true");
     if (doTouch) {
       String uploadPort = prefs.get("serial.port");
-      String caterinaUploadPort = null;
+      String newUploadPort = null;
       try {
         // Toggle 1200 bps on selected serial port to force board reset.
         List<String> before = Serial.list();
@@ -104,10 +104,10 @@ public class BasicUploader extends Uploader  {
             System.out.println("}");
           }
           if (diff.size() > 0) {
-            caterinaUploadPort = diff.get(0);
+            newUploadPort = diff.get(0);
             if (verbose || Preferences.getBoolean("upload.verbose"))
-              System.out.println("Found Leonardo upload port: " +
-                  caterinaUploadPort);
+              System.out.println("Found upload port: " +
+                  newUploadPort);
             break;
           }
 
@@ -125,16 +125,16 @@ public class BasicUploader extends Uploader  {
             if (verbose || Preferences.getBoolean("upload.verbose"))
               System.out
                   .println("Uploading using selected port: " + uploadPort);
-            caterinaUploadPort = uploadPort;
+            newUploadPort = uploadPort;
             break;
           }
         }
-        if (caterinaUploadPort == null)
+        if (newUploadPort == 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;
+        uploadPort = newUploadPort;
       } catch (SerialException e) {
         throw new RunnerException(e.getMessage());
       } catch (InterruptedException e) {

hardware/arduino/sam/boards.txt

@@ -30,6 +30,21 @@ arduino_due_x.build.variant_system_lib=libsam_sam3x8e_gcc_rel.a
 arduino_due_x.build.vid=0x2341
 arduino_due_x.build.pid=0x003e
 
+arduino_due_x_r2.name=Arduino DueX R2 Dev. Ed.
+arduino_due_x_r2.upload.tool=bossac
+arduino_due_x_r2.upload.protocol=sam-ba
+arduino_due_x_r2.upload.maximum_size=524288
+arduino_due_x_r2.upload.use_1200bps_touch=true
+arduino_due_x_r2.build.mcu=cortex-m3
+arduino_due_x_r2.build.f_cpu=84000000L
+arduino_due_x_r2.build.core=arduino
+arduino_due_x_r2.build.extra_flags=-D__SAM3X8E__ -mthumb -DUSB_PID={build.pid} -DUSB_VID={build.vid} -DUSBCON
+arduino_due_x_r2.build.ldscript=linker_scripts/gcc/flash.ld
+arduino_due_x_r2.build.variant=arduino_due_x
+arduino_due_x_r2.build.variant_system_lib=libsam_sam3x8e_gcc_rel.a
+arduino_due_x_r2.build.vid=0x2341
+arduino_due_x_r2.build.pid=0x003e
+
 ##############################################################
 
 adk2.name=Google ADK2

hardware/arduino/sam/cores/arduino/USB/CDC.cpp

@@ -73,6 +73,38 @@ int WEAK CDC_GetInterface(uint8_t* interfaceNum)
 	return USBD_SendControl(0,&_cdcInterface,sizeof(_cdcInterface));
 }
 
+__attribute__ ((long_call, section (".ramfunc")))
+void banzai() {
+	// Disable all interrupts
+	__disable_irq();
+
+	// Set bootflag to run SAM-BA bootloader at restart
+	const int EEFC_FCMD_CGPB = 0x0C;
+	const int EEFC_KEY = 0x5A;
+	while (EFC0->EEFC_FSR & EEFC_FSR_FRDY == 0);
+	EFC0->EEFC_FCR =
+		EEFC_FCR_FCMD(EEFC_FCMD_CGPB) |
+		EEFC_FCR_FARG(1) |
+		EEFC_FCR_FKEY(EEFC_KEY);
+	while (EFC0->EEFC_FSR & EEFC_FSR_FRDY == 0);
+
+	// From here flash memory is no more available.
+
+	// Memory swap needs some time to stabilize
+	volatile uint32_t i;
+	for (i=0; i<1000000; i++);
+
+	// BANZAIIIIIII!!!
+	const int RSTC_KEY = 0xA5;
+	RSTC->RSTC_CR =
+		RSTC_CR_KEY(RSTC_KEY) |
+		RSTC_CR_PROCRST |
+		RSTC_CR_PERRST |
+		RSTC_CR_EXTRST;
+
+	while (true);
+}
+
 bool WEAK CDC_Setup(Setup& setup)
 {
 	uint8_t r = setup.bRequest;
@@ -99,31 +131,12 @@ bool WEAK CDC_Setup(Setup& setup)
 		{
 			_usbLineInfo.lineState = setup.wValueL;
 			// auto-reset into the bootloader is triggered when the port, already
-			// open at 1200 bps, is closed.  this is the signal to start the watchdog
-			// with a relatively long period so it can finish housekeeping tasks
-			// like servicing endpoints before the sketch ends
+			// open at 1200 bps, is closed.
 			if (1200 == _usbLineInfo.dwDTERate)
 			{
 				// We check DTR state to determine if host port is open (bit 0 of lineState).
 				if ((_usbLineInfo.lineState & 0x01) == 0)
-				{
-/* TODO, AVR Stuff
-					*(uint16_t *)0x0800 = 0x7777;
-					wdt_enable(WDTO_120MS);
-*/
-				}
-				else
-				{
-					// Most OSs do some intermediate steps when configuring ports and DTR can
-					// twiggle more than once before stabilizing.
-					// To avoid spurious resets we set the watchdog to 250ms and eventually
-					// cancel if DTR goes back high.
-/* TODO, AVR Stuff
-					wdt_disable();
-					wdt_reset();
-					*(uint16_t *)0x0800 = 0x0;
-*/
-				}
+					banzai();
 			}
 			return true;
 		}
@@ -131,7 +144,6 @@ bool WEAK CDC_Setup(Setup& setup)
 	return false;
 }
 
-
 int _serialPeek = -1;
 void Serial_::begin(uint32_t baud_count)
 {