Does not work yet but getting closer?

src/main/java/com/rusefi/dfu/DfuCommmand.java

@@ -7,7 +7,12 @@ public enum DfuCommmand {
     GETSTATUS(3),
     CLRSTATUS(4),
     GETSTATE(5),
-    ABORT(6);
+    ABORT(6),
+
+    /**
+     * http://dfu-util.sourceforge.net/dfuse.html
+     */
+    SE_SET_ADDRESS(0x21);
 
     private final byte value;
 

src/main/java/com/rusefi/dfu/commands/DfuCommandAbort.java

@@ -0,0 +1,13 @@
+package com.rusefi.dfu.commands;
+
+import com.rusefi.dfu.DfuCommmand;
+import com.rusefi.dfu.usb4java.USBDfuConnection;
+
+import java.nio.ByteBuffer;
+
+public class DfuCommandAbort {
+    public static void execute(USBDfuConnection session) {
+        ByteBuffer buffer = ByteBuffer.allocateDirect(0);
+        session.sendData(DfuCommmand.ABORT, (short) 0, buffer);
+    }
+}

src/main/java/com/rusefi/dfu/commands/DfuCommandClearStatus.java

@@ -6,11 +6,8 @@ import com.rusefi.dfu.usb4java.USBDfuConnection;
 import java.nio.ByteBuffer;
 
 public class DfuCommandClearStatus {
-
-
     public static void execute(USBDfuConnection session) {
         ByteBuffer buffer = ByteBuffer.allocateDirect(0);
         session.sendData(DfuCommmand.CLRSTATUS, (short) 0, buffer);
-
     }
 }

src/main/java/com/rusefi/dfu/commands/DfuSeCommandSetAddress.java

@@ -0,0 +1,14 @@
+package com.rusefi.dfu.commands;
+
+import com.rusefi.dfu.DfuCommmand;
+import com.rusefi.dfu.usb4java.USBDfuConnection;
+
+import java.nio.ByteBuffer;
+
+public class DfuSeCommandSetAddress {
+    public static void execute(USBDfuConnection session, int address) {
+        ByteBuffer buffer = ByteBuffer.allocateDirect(4);
+        buffer.putInt(address);
+        session.sendData(DfuCommmand.CLRSTATUS, (short) 0, buffer);
+    }
+}

src/main/java/com/rusefi/dfu/usb4java/DfuDeviceLocator.java

@@ -2,6 +2,7 @@ package com.rusefi.dfu.usb4java;
 
 import com.rusefi.dfu.DfuSeFlashDescriptor;
 import com.rusefi.dfu.FlashRange;
+import com.rusefi.dfu.commands.DfuCommandAbort;
 import com.rusefi.dfu.commands.DfuCommandClearStatus;
 import com.rusefi.dfu.commands.DfuCommandGetStatus;
 import org.apache.commons.logging.Log;
@@ -150,6 +151,14 @@ public class DfuDeviceLocator {
                             case DFU_ERROR:
                                 DfuCommandClearStatus.execute(session);
                                 break;
+                            case DFU_DOWNLOAD_SYNC:
+                            case DFU_DOWNLOAD_IDLE:
+                            case DFU_UPLOAD_IDLE:
+                            case DFU_MANIFEST_SYNC:
+                            case DFU_DOWNLOAD_BUSY:
+                            case DFU_MANIFEST:
+                                DfuCommandAbort.execute(session);
+                                break;
                             default:
                                 throw new IllegalStateException("Unexpected state " + state);
                         }

src/main/java/com/rusefi/dfu/usb4java/USBDfuConnection.java

@@ -15,6 +15,8 @@ public class USBDfuConnection implements DfuConnection {
     private final FlashRange flashRange;
 
     public USBDfuConnection(DeviceHandle deviceHandle, byte interfaceNumber, int transferSize, FlashRange flashRange) {
+        if (transferSize == 0)
+            throw new IllegalArgumentException("transfer size not detected");
         this.deviceHandle = deviceHandle;
         this.interfaceNumber = interfaceNumber;
         this.transferSize = transferSize;

src/test/java/com/rusefi/dfu/Sandbox.java

@@ -1,5 +1,7 @@
 package com.rusefi.dfu;
 
+import com.rusefi.dfu.commands.DfuCommandGetStatus;
+import com.rusefi.dfu.commands.DfuSeCommandSetAddress;
 import com.rusefi.dfu.usb4java.DfuDeviceLocator;
 import com.rusefi.dfu.usb4java.LogUtil;
 import com.rusefi.dfu.usb4java.USBDfuConnection;
@@ -8,6 +10,7 @@ import org.apache.commons.logging.Log;
 
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.nio.ByteBuffer;
 
 public class Sandbox {
     private static final Log log = LogUtil.getLog(Sandbox.class);
@@ -23,7 +26,37 @@ public class Sandbox {
 
         HexImage image = HexImage.loadHexToBuffer(new FileInputStream("rusefi.hex"), device.getFlashRange());
 
+        for (int offset = 0; offset < device.getFlashRange().getTotalLength(); offset += device.getTransferSize()) {
+            System.out.println("Handing offset " + offset);
+            DfuSeCommandSetAddress.execute(device, device.getFlashRange().getBaseAddress() + offset);
+            waitStatus(device);
+
+            ByteBuffer buffer = ByteBuffer.allocateDirect(device.getTransferSize());
+            buffer.put(image.getImage(), offset, device.getTransferSize());
+            device.sendData(DfuCommmand.DNLOAD, (short) 2, buffer);
+            waitStatus(device);
+        }
+
 
         log.info("STM32 DFU " + device);
     }
+
+    private static void waitStatus(USBDfuConnection device) {
+        DfuCommandGetStatus.State state = DfuCommandGetStatus.read(device);
+        System.out.println(" state " + state);
+        while (state == DfuCommandGetStatus.State.DFU_DOWNLOAD_BUSY) {
+            sleep(106);
+            state = DfuCommandGetStatus.read(device);
+            System.out.println(" state " + state);
+        }
+    }
+
+    private static void sleep(int millis) {
+        System.out.println("Sleep " + millis);
+        try {
+            Thread.sleep(millis);
+        } catch (InterruptedException e) {
+            throw new IllegalStateException(e);
+        }
+    }
 }