Add a dummy AX25 transmit function and make AX25 RX changes.

AX25TX.cpp

@@ -0,0 +1,49 @@
+/*
+ *   Copyright (C) 2020 by Jonathan Naylor G4KLX
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "Config.h"
+#include "Globals.h"
+#include "AX25TX.h"
+
+
+CAX25TX::CAX25TX()
+{
+}
+
+void CAX25TX::process()
+{
+}
+
+uint8_t CAX25TX::writeData(const uint8_t* data, uint16_t length)
+{
+  return 0U;
+}
+
+void CAX25TX::setParams(int8_t twist)
+{
+}
+
+void CAX25TX::setTXDelay(uint8_t delay)
+{
+}
+
+uint8_t CAX25TX::getSpace() const
+{
+  return 0U;
+}
+