Added the apa102 engine class

Former-commit-id: 03e11a19aed2ae782c5d134e1f4fcf9faea1969e

libsrc/leddevice/LedDeviceAPA102.cpp

@@ -0,0 +1,47 @@
+
+// STL includes
+#include <cstring>
+#include <cstdio>
+#include <iostream>
+
+// Linux includes
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+// hyperion local includes
+#include "LedDeviceAPA102.h"
+
+LedDeviceAPA102::LedDeviceAPA102(const std::string& outputDevice, const unsigned baudrate) :
+	LedSpiDevice(outputDevice, baudrate, 500000),
+	mLedCount(0)
+{
+	// empty
+}
+
+int LedDeviceAPA102::write(const std::vector<ColorRgb> &ledValues)
+{
+	mLedCount = ledValues.size();
+
+	const unsigned dataLen = 8 + (ledValues.size() * (sizeof(ColorRgb) + 1));
+	const uint8_t data[dataLen] = { 0x00, 0x00, 0x00, 0x00 };
+	int position = 4;
+	for (ColorRgb* rgb : ledValues ){
+		data[i++] = 0xFF;
+		data[i++] = rgb.red;
+		data[i++] = rgb.green;
+		data[i++] = rgb.blue;
+	}
+
+	// Write end frame
+	data[i++] = 0xFF;
+	data[i++] = 0xFF;
+	data[i++] = 0xFF;
+	data[i++] = 0xFF;
+
+	return writeBytes(dataLen, data);
+}
+
+int LedDeviceAPA102::switchOff()
+{
+	return write(std::vector<ColorRgb>(mLedCount, ColorRgb{0,0,0}));
+}