Simplified code a bit. Emulator does not work stable when replugging pixy.

emulator/qt/ll_system.cpp

@@ -1,4 +1,6 @@
 #include <QThread>
+#include <QApplication>
+
 extern "C" {
 #include "ll_system.h"
 }
@@ -11,3 +13,7 @@ void ll_system_delay(uint32_t msec) {
         QThread::msleep(msec);
 }
 
+void ll_system_process() {
+        QApplication::processEvents();
+}
+

emulator/qt/main.cpp

@@ -10,7 +10,6 @@ extern "C" {
 void app_loop() {
     while(!QApplication::closingDown()) {
         app_process();
-        QApplication::processEvents();
     }
 }