Index: sources/update/UiProtocol.cpp
===================================================================
diff -u -r110fa8df5fc77830fa05d04af55b349dd8f9c6d9 -r7cf31f6cfef97bb564a103c263821a3b722c8a2b
--- sources/update/UiProtocol.cpp	(.../UiProtocol.cpp)	(revision 110fa8df5fc77830fa05d04af55b349dd8f9c6d9)
+++ sources/update/UiProtocol.cpp	(.../UiProtocol.cpp)	(revision 7cf31f6cfef97bb564a103c263821a3b722c8a2b)
@@ -15,10 +15,10 @@
  */
 
 #include "UiProtocol.h"
-#include "UiSwUpdate.h"
 #include "IDataProvider.h"
-
+#include "IEnterBootLoader.h"
 #include "Logger.h"
+#include "UiSwUpdate.h"
 
 #include <chrono>
 #include <cstring>
@@ -62,8 +62,9 @@
     _retries(0),
     _lastRx{(uint8)0},
     _link(KBPS_WIRE),
-    _pThread(nullptr), 
-    _completedOk(false)
+    _pThread(nullptr),
+    _completedOk(false),
+    _pEnterBL(nullptr)
 {
     ; // NOP.
 }
@@ -253,7 +254,13 @@
     // Reset the transfered counter.
     _transfered = 0;
     _link.resetRetries();
-        
+
+    // If enterbootloader exists, use it.
+    if (_pEnterBL != nullptr) {
+        _pEnterBL->sendEnterBootloader(
+            (_target == HD) || (_target == HDFPGA));
+    }
+
     // Send start.
     _state = UpdateState::Starting;
     bool ok = _sendCommand(SwUpdateCmdEnum::Start);