Merge pull request #442 from redPanther/master

add FadeCandy/OPC device support

Former-commit-id: 6280f77551c607acb301328ce197ca357d0a8b11

libsrc/leddevice/CMakeLists.txt

@@ -20,6 +20,8 @@ SET(Leddevice_QT_HEADERS
 		${CURRENT_SOURCE_DIR}/LedDevicePhilipsHue.h
 		${CURRENT_SOURCE_DIR}/LedHIDDevice.h
 		${CURRENT_SOURCE_DIR}/LedDeviceRawHID.h
+		${CURRENT_SOURCE_DIR}/LedDeviceTest.h
+		${CURRENT_SOURCE_DIR}/LedDeviceFadeCandy.h
 )
 
 SET(Leddevice_HEADERS
@@ -32,6 +34,7 @@ SET(Leddevice_HEADERS
 		${CURRENT_SOURCE_DIR}/LedDevicePiBlaster.h
 		${CURRENT_SOURCE_DIR}/LedDeviceSedu.h
 		${CURRENT_SOURCE_DIR}/LedDeviceTest.h
+		${CURRENT_SOURCE_DIR}/LedDeviceFadeCandy.h
 		${CURRENT_SOURCE_DIR}/LedDeviceHyperionUsbasp.h
 		${CURRENT_SOURCE_DIR}/LedDeviceTpm2.h
 		${CURRENT_SOURCE_DIR}/LedDeviceAtmo.h
@@ -53,6 +56,7 @@ SET(Leddevice_SOURCES
 		${CURRENT_SOURCE_DIR}/LedDevicePiBlaster.cpp
 		${CURRENT_SOURCE_DIR}/LedDeviceSedu.cpp
 		${CURRENT_SOURCE_DIR}/LedDeviceTest.cpp
+		${CURRENT_SOURCE_DIR}/LedDeviceFadeCandy.cpp
 		${CURRENT_SOURCE_DIR}/LedDeviceHyperionUsbasp.cpp
 		${CURRENT_SOURCE_DIR}/LedDevicePhilipsHue.cpp
 		${CURRENT_SOURCE_DIR}/LedDeviceTpm2.cpp

libsrc/leddevice/LedDeviceFactory.cpp

@@ -30,6 +30,7 @@
 #include "LedDevicePiBlaster.h"
 #include "LedDeviceSedu.h"
 #include "LedDeviceTest.h"
+#include "LedDeviceFadeCandy.h"
 #include "LedDeviceHyperionUsbasp.h"
 #include "LedDevicePhilipsHue.h"
 #include "LedDeviceTpm2.h"
@@ -243,6 +244,12 @@ LedDevice * LedDeviceFactory::construct(const Json::Value & deviceConfig)
 		const std::string output = deviceConfig["output"].asString();
 		device = new LedDeviceTest(output);
 	}
+	else if (type == "fadecandy")
+	{
+		const std::string host 	= deviceConfig.get("output", "127.0.0.1").asString();
+		const uint16_t port 		= deviceConfig.get("port", 7890).asInt();
+		device = new LedDeviceFadeCandy(host,port);
+	}
 	else if (type == "tpm2")
 	{
 		const std::string output = deviceConfig["output"].asString();

libsrc/leddevice/LedDeviceFadeCandy.cpp

@@ -0,0 +1,93 @@
+#include "LedDeviceFadeCandy.h"
+
+static const unsigned MAX_NUM_LEDS    = 512;
+static const unsigned OPC_BROADCAST   = 0;    // OPC broadcast channel
+static const unsigned OPC_SET_PIXELS  = 0;    // OPC command codes
+static const unsigned OPC_HEADER_SIZE = 4;    // OPC header size
+
+
+LedDeviceFadeCandy::LedDeviceFadeCandy(const std::string& host, const uint16_t port) :
+	_host(host), _port(port)
+{
+	_opc_data.resize( OPC_HEADER_SIZE );
+	_opc_data[0] = OPC_BROADCAST;
+	_opc_data[1] = OPC_SET_PIXELS;
+	_opc_data[2] = 0;
+	_opc_data[3] = 0;
+}
+
+
+LedDeviceFadeCandy::~LedDeviceFadeCandy()
+{
+	_client.close();
+}
+
+
+bool LedDeviceFadeCandy::isConnected()
+{
+	return _client.state() == QAbstractSocket::ConnectedState;
+}
+
+
+bool LedDeviceFadeCandy::tryConnect()
+{
+	if (  _client.state() == QAbstractSocket::UnconnectedState ) {
+		qDebug("connecting to %s %i",_host.c_str(),_port);
+
+		_client.connectToHost( _host.c_str(), _port);
+		if ( _client.waitForConnected(1000) )
+			qDebug("connected");
+	}
+
+	return isConnected();
+}
+
+
+int LedDeviceFadeCandy::write( const std::vector<ColorRgb> & ledValues )
+{
+	ssize_t nrLedValues = ledValues.size();
+	ssize_t led_data_size = nrLedValues * 3;    // 3 color bytes
+	ssize_t opc_data_size = led_data_size + OPC_HEADER_SIZE;
+
+	if (nrLedValues > MAX_NUM_LEDS)
+	{
+		std::cerr << "Invalid attempt to write led values. Not more than " << MAX_NUM_LEDS << " leds are allowed." << std::endl;
+		return -1;
+	}
+
+	if ( opc_data_size != _opc_data.size() )
+		_opc_data.resize( opc_data_size );
+
+	_opc_data[2] = led_data_size >> 8;
+	_opc_data[3] = led_data_size & 0xff;
+
+	uint idx = OPC_HEADER_SIZE;
+	for (const ColorRgb& color : ledValues)
+	{
+		_opc_data[idx  ] = unsigned( color.red   );
+		_opc_data[idx+1] = unsigned( color.green );
+		_opc_data[idx+2] = unsigned( color.blue  );
+		idx += 3;
+	}
+
+	return ( transferData()<0 ? -1 : 0 );
+}
+
+
+int LedDeviceFadeCandy::transferData()
+{
+	if ( isConnected() || tryConnect() )
+		return _client.write( _opc_data, _opc_data.size() );
+
+	return -2;
+}
+
+
+int LedDeviceFadeCandy::switchOff()
+{
+	for ( int idx=OPC_HEADER_SIZE; idx < _opc_data.size(); idx++ )
+		_opc_data[idx] = 0;
+
+	return ( transferData()<0 ? -1 : 0 );
+}
+

libsrc/leddevice/LedDeviceFadeCandy.h

@@ -0,0 +1,70 @@
+#pragma once
+
+// STL/Qt includes
+#include <fstream>
+#include <QObject>
+#include <QTcpSocket>
+
+// Leddevice includes
+#include <leddevice/LedDevice.h>
+
+///
+/// Implementation of the LedDevice interface for sending to
+/// fadecandy/opc-server via network by using the 'open pixel control' protocol.
+///
+class LedDeviceFadeCandy : public QObject, public LedDevice
+{
+	Q_OBJECT
+
+public:
+	///
+	/// Constructs the LedDevice for fadecandy/opc server
+	///
+	/// @param host The ip address/host name of fadecandy/opc server
+	/// @param port The port to use (fadecandy default is 7890)
+	///
+	LedDeviceFadeCandy(const std::string& host, const uint16_t port);
+
+	///
+	/// Destructor of the LedDevice; closes the tcp client
+	///
+	virtual ~LedDeviceFadeCandy();
+
+	///
+	/// 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:
+	QTcpSocket        _client;
+	const std::string _host;
+	const uint16_t    _port;
+	QByteArray        _opc_data;
+
+	/// try to establish connection to opc server, if not connected yet
+	///
+	/// @return true if connection is established
+	///
+	bool tryConnect();
+
+	/// return the conenction state
+	///
+	/// @return True if connection established
+	///
+	bool isConnected();
+
+
+	/// transfer current opc_data buffer to opc server
+	///
+	/// @return amount of transfered bytes. -1 error while transfering, -2 error while connecting
+	///
+	int transferData();
+	
+};