Send AUX commands to MC imitating attached HC

indi-celestronaux/celestronaux.cpp

@@ -134,7 +134,7 @@ bool CelestronAUX::Handshake()
 
                 LOG_INFO("Setting serial speed to 9600 baud.");
 
-                // detect if connectd to HC port or to mount USB port
+                // detect if connected to HC port or to mount USB port
                 // ask for HC version
                 char version[10];
                 if ((m_isHandController = detectHC(version, 10)))
@@ -513,6 +513,17 @@ bool CelestronAUX::updateProperties()
         FirmwareTP[FW_GPS].setText(fwText);
         defineProperty(FirmwareTP);
 
+        // When no HC is attached, the following three commands needs to be send
+	// to the motor controller (MC): MC_SET_POSITION, MC_SET_CORDWRAP_POSITION
+	// and MC_CORDWRAP_ON. These three commands are also send by the HC
+	// to the MC during HC startup and quick align process.
+        // TODO: One can set the HC in pass through mode, that is,
+        // the HC relays the AUX commands only and does not interfere in the communication.
+	if (!m_isHandController && m_MountType == EQ_GEM)
+	{
+	    startupWithoutHC();
+	}
+
         if (InitPark())
         {
             // If loading parking data is successful, we just set the default parking values.
@@ -2033,6 +2044,42 @@ bool CelestronAUX::isHomingDone(INDI_HO_AXIS axis)
     return true;
 }
 
+/////////////////////////////////////////////////////////////////////////////////////
+///
+/////////////////////////////////////////////////////////////////////////////////////
+void CelestronAUX::startupWithoutHC()
+{
+    AUXBuffer data(3);
+    data[0] = 0x40;
+    data[1] = 0x00;
+    data[2] = 0x00;
+
+    AUXCommand command(MC_SET_POSITION, APP, AZM, data);
+    sendAUXCommand(command);
+    readAUXResponse(command);
+
+    command = AUXCommand(MC_SET_POSITION, APP, ALT, data);
+    sendAUXCommand(command);
+    readAUXResponse(command);
+
+    data[0] = 0xc0;
+    command = AUXCommand(MC_SET_CORDWRAP_POS, APP, AZM, data);
+    sendAUXCommand(command);
+    readAUXResponse(command);
+
+    command = AUXCommand(MC_SET_CORDWRAP_POS, APP, ALT, data);
+    sendAUXCommand(command);
+    readAUXResponse(command);
+
+    command = AUXCommand(MC_ENABLE_CORDWRAP, APP, AZM);
+    sendAUXCommand(command);
+    readAUXResponse(command);
+
+    command = AUXCommand(MC_ENABLE_CORDWRAP, APP, ALT);
+    sendAUXCommand(command);
+    readAUXResponse(command);
+}
+
 /////////////////////////////////////////////////////////////////////////////////////
 ///
 /////////////////////////////////////////////////////////////////////////////////////

indi-celestronaux/celestronaux.h

@@ -226,12 +226,12 @@ class CelestronAUX :
         {
             return m_Location.latitude >= 0;
         }
+        void startupWithoutHC();
         bool getModel(AUXTargets target);
         bool getVersion(AUXTargets target);
         void getVersions();
         void hex_dump(char *buf, AUXBuffer data, size_t size);
 
-
         double AzimuthToDegrees(double degree);
         double DegreesToAzimuth(double degree);