Added APA102 Led Device headers

Former-commit-id: bd9a5d1216d37275bcb807e19d043e1ea1e3ead6

libsrc/leddevice/LedDeviceAPA102.h

@@ -0,0 +1,41 @@
+#pragma once
+
+// STL includes
+#include <string>
+
+// hyperion incluse
+#include "LedSpiDevice.h"
+
+///
+/// Implementation of the LedDevice interface for writing to APA102 led device.
+///
+/// APA102 is
+///
+class LedDeviceAPA102 : public LedSpiDevice
+{
+public:
+	///
+	/// Constructs the LedDevice for a string containing leds of the type APA102
+	///
+	/// @param outputDevice The name of the output device (eg '/etc/SpiDev.0.0')
+	/// @param baudrate The used baudrate for writing to the output device
+	///
+	LedDeviceAPA102(const std::string& outputDevice,
+					const unsigned baudrate);
+
+	///
+	/// Writes the led color values to the led-device
+	///
+	/// @param ledValues The color-value per led
+	/// @return Zero on succes else negative
+	///
+	virtual int write(const std::vector<ColorRgb> &ledValues);
+
+	/// Switch the leds off
+	virtual int switchOff();
+
+private:
+
+	/// the number of leds (needed when switching off)
+	size_t mLedCount;
+};