various fixes (#129)

* various fixes:
- add folder for firmware known as working with hyperion
- rs232: add debug message for close and do not repeat "port not found" message more than neccessary
- v4l2: fix grabber started on creation when set to disabled
- cmake: add new platform x86-dev - this as most code coverage and is usefull for test/development. This is not for release

* add hints for effect-args

libsrc/grabber/v4l2/V4L2Grabber.cpp

@@ -77,22 +77,27 @@ void V4L2Grabber::uninit()
 
 bool V4L2Grabber::init()
 {
-	if ( _deviceName == "auto" )
-	{
-		for (auto& dev: _v4lDevices)
-		{
-			Debug(_log, "check v4l2 device: %s (%s)",dev.first.c_str(), dev.second.c_str());
-			_deviceName = dev.first;
-			if ( init() )
-			{
-				Info(_log, "found usable v4l2 device: %s (%s)",dev.first.c_str(), dev.second.c_str());
-				break;
-			}
-		}
-	}
-	
 	if (! _initialized)
 	{
+		getV4Ldevices();
+		if ( _deviceName == "auto" )
+		{
+			for (auto& dev: _v4lDevices)
+			{
+				Debug(_log, "check v4l2 device: %s (%s)",dev.first.c_str(), dev.second.c_str());
+				_deviceName = dev.first;
+				if ( init() )
+				{
+					Info(_log, "found usable v4l2 device: %s (%s)",dev.first.c_str(), dev.second.c_str());
+					break;
+				}
+			}
+		}
+		else
+		{
+			Info(_log, "configured v4l device: %s", _deviceName.c_str());
+		}
+
 		bool opened = false;
 		try
 		{

libsrc/grabber/v4l2/V4L2Wrapper.cpp

@@ -57,7 +57,6 @@ V4L2Wrapper::V4L2Wrapper(const std::string &device,
 	_timer.setInterval(500);
 	_timer.setSingleShot(false);
 	QObject::connect(&_timer, SIGNAL(timeout()), this, SLOT(checkSources()));
-	_timer.start();
 }
 
 V4L2Wrapper::~V4L2Wrapper()
@@ -67,6 +66,7 @@ V4L2Wrapper::~V4L2Wrapper()
 
 bool V4L2Wrapper::start()
 {
+	_timer.start();
 	bool grabber_started = _grabber.start();
 	if ( ! grabber_started )
 	{