Add FM mode display.

Nextion.cpp

@@ -1,5 +1,5 @@
 /*
- *   Copyright (C) 2016,2017,2018 by Jonathan Naylor G4KLX
+ *   Copyright (C) 2016,2017,2018,2020 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
@@ -102,7 +102,6 @@ bool CNextion::open()
 	return true;
 }
 
-
 void CNextion::setIdleInt()
 {
 	// a few bits borrowed from Lieven De Samblanx ON7LDS, NextionDriver
@@ -240,6 +239,25 @@ void CNextion::setQuitInt()
 	m_mode = MODE_QUIT;
 }
 
+void CNextion::setFMInt()
+{
+	sendCommand("page MMDVM");
+	sendCommandAction(1U);
+
+	char command[20];
+	if (m_brightness > 0) {
+		::sprintf(command, "dim=%u", m_brightness);
+		sendCommand(command);
+	}
+
+	sendCommand("t0.txt=\"FM\"");
+	sendCommandAction(15U);
+
+	m_clockDisplayTimer.stop();
+
+	m_mode = MODE_FM;
+}
+
 void CNextion::writeDStarInt(const char* my1, const char* my2, const char* your, const char* type, const char* reflector)
 {
 	assert(my1 != NULL);