Minor progress

DCCEXParser.cpp

@@ -1060,15 +1060,15 @@ bool DCCEXParser::parseI(Print *stream, int16_t params, int16_t p[])
 
     default:    // If we're here, it must be creating a turntable object
         {
-            DIAG(F("Params: %d"), params);
             if (params > 5 && params < 41 && p[1] == HASH_KEYWORD_EXTT) {
                 DIAG(F("Create EXTT turntable %d on vpin %d and address %d with %d positions"), p[0], p[2], p[3], params - 4);
+                if (Turntable::get(p[0])) return false;
                 if (!EXTTTurntable::create(p[0], (VPIN)p[2], (uint8_t)p[3])) return false;
                 Turntable *tto = Turntable::get(p[0]);
-                for ( uint8_t i = params - 4; i > 0; i--) {
+                for (uint8_t i = params - 4; i > 0; i--) {
                     tto->addPosition(p[i + 3]);
-                    DIAG(F("Add position %d"), p[i + 3]);
                 }
+                tto->addPosition(0);    // Need to add position 0 as 0 so positions start at 1
             } else if (params > 3 && params < 39 && p[1] == HASH_KEYWORD_DCC) {
                 DIAG(F("Create DCC turntable %d at base address %d with %d positions"), p[0], p[2], params - 2);
             } else {

IO_EXTurntable.cpp

@@ -51,6 +51,7 @@ EXTurntable::EXTurntable(VPIN firstVpin, int nPins, I2CAddress I2CAddress) {
 void EXTurntable::_begin() {
   I2CManager.begin();
   if (I2CManager.exists(_I2CAddress)) {
+    DIAG(F("EX-Turntable device found, I2C:%s"), _I2CAddress.toString());
 #ifdef DIAG_IO
     _display();
 #endif