Add support for Smartport telemetry

Not tested with a real telemetry source yet.

This does not require any setting to change the telemetry protocol
in use, because the ground station uses different ports already, we
just listen on each of them in the different telemetry classes and
everything will just work.

Ref: #17

QOpenHD.pro

@@ -68,6 +68,7 @@ SOURCES += \
     src/openhdtelemetry.cpp \
     src/powermicroservice.cpp \
     src/qopenhdlink.cpp \
+    src/smartporttelemetry.cpp \
     src/util.cpp \
     src/vectortelemetry.cpp
 
@@ -93,6 +94,7 @@ HEADERS += \
     inc/openhdsettings.h \
     inc/openhdtelemetry.h \
     inc/qopenhdlink.h \
+    inc/smartporttelemetry.h \
     inc/util.h \
     inc/vectortelemetry.h \
     inc/wifibroadcast.h \

inc/smartporttelemetry.h

@@ -0,0 +1,59 @@
+#ifndef SMARTPORTTELEMETRY_H
+#define SMARTPORTTELEMETRY_H
+
+#include <QObject>
+#include <QtQuick>
+
+#include "constants.h"
+
+
+typedef struct {
+    uint16_t id;
+    union {
+        uint32_t u32;
+        int32_t i32;
+        uint16_t u16;
+        int16_t i16;
+        uint8_t u8;
+        uint8_t b[4];
+        int8_t i8;
+        float f;
+    } data;
+    uint8_t crc;
+} tSPortData;
+
+
+class QUdpSocket;
+
+class SmartportTelemetry: public QObject {
+    Q_OBJECT
+
+public:
+    explicit SmartportTelemetry(QObject *parent = nullptr);
+
+
+    Q_PROPERTY(QString last_heartbeat MEMBER m_last_heartbeat WRITE set_last_heartbeat NOTIFY last_heartbeat_changed)
+    void set_last_heartbeat(QString last_heartbeat);
+
+signals:
+    void last_heartbeat_changed(QString last_heartbeat);
+
+
+private slots:
+    void processSmartportDatagrams();
+
+private:
+    void init();
+    void smartport_read(uint8_t *buf, int buflen);
+    uint8_t u8CheckCrcSPORT(uint8_t *t);
+
+    void processSmartportMessage(uint8_t *b);
+
+    QUdpSocket *smartportSocket = nullptr;
+
+    QString m_last_heartbeat = "N/A";
+    qint64 last_heartbeat_timestamp;
+
+};
+
+#endif //SMARTPORTTELEMETRY_H

qml/main.qml

@@ -164,6 +164,10 @@ ApplicationWindow {
     //    id: mspTelemetry
     //}
 
+    SmartportTelemetry {
+        id: smartportTelemetry
+    }
+
     LTMTelemetry {
         id: ltmTelemetry
     }

src/main.cpp

@@ -27,6 +27,7 @@ const QVector<QString> permissions({"android.permission.INTERNET",
 #include "msptelemetry.h"
 #include "ltmtelemetry.h"
 #include "vectortelemetry.h"
+#include "smartporttelemetry.h"
 
 #include "qopenhdlink.h"
 
@@ -137,6 +138,7 @@ int main(int argc, char *argv[]) {
     qmlRegisterType<MSPTelemetry>("OpenHD", 1, 0, "MSPTelemetry");
     qmlRegisterType<LTMTelemetry>("OpenHD", 1, 0, "LTMTelemetry");
     qmlRegisterType<VectorTelemetry>("OpenHD", 1, 0, "VectorTelemetry");
+    qmlRegisterType<SmartportTelemetry>("OpenHD", 1, 0, "SmartportTelemetry");
 
     qmlRegisterType<OpenHDRC>("OpenHD", 1, 0, "OpenHDRC");