Post pause feature from previous update ported to stock/gruvin board.

Have tested on stock - can a gruvin board user test?

src/stock/audio.cpp

@@ -53,15 +53,20 @@ void audioQueue::heartbeat()
 #endif
 
   if (toneTimeLeft > 0) {
-#if defined(PCBV4)
-    if (toneFreq) {
-      OCR0A = (5000 / toneFreq); // sticking with old values approx 20(abs. min) to 90, 60 being the default tone(?).
-      SPEAKER_ON;
-    }
-#endif
-    toneTimeLeft--; //time gets counted down
-    toneFreq += toneFreqIncr;
-    // TODO tone2TimeLeft = 0?
+	if(toneFreq == 0){  //pause only events
+		SPEAKER_OFF;
+	} else {	  	
+	#if defined(PCBV4)
+	    if (toneFreq) {
+	      OCR0A = (5000 / toneFreq); // sticking with old values approx 20(abs. min) to 90, 60 being the default tone(?).
+	      SPEAKER_ON;
+	    }
+	#endif
+	    
+	    toneFreq += toneFreqIncr;
+	    // TODO tone2TimeLeft = 0?
+	}   
+	toneTimeLeft--; //time gets counted down 
   }
   else {
     if (tonePause > 0) {
@@ -111,6 +116,10 @@ inline uint8_t audioQueue::getToneLength(uint8_t tLen)
   return result;
 }
 
+void audioQueue::pause(uint8_t tLen){
+	play(0,tLen,5); // a pause	
+}
+
 void audioQueue::play(uint8_t tFreq, uint8_t tLen, uint8_t tPause,
     uint8_t tFlags, int8_t tFreqIncr)
 {
@@ -120,7 +129,10 @@ void audioQueue::play(uint8_t tFreq, uint8_t tLen, uint8_t tPause,
     tone2Pause = tPause;
   }
   else {
-    tFreq += g_eeGeneral.speakerPitch + BEEP_OFFSET; // add pitch compensator
+    if(tFreq > 0) //we dont add pitch if zero as this is a pause only event
+    {
+    	tFreq += g_eeGeneral.speakerPitch + BEEP_OFFSET; // add pitch compensator
+    }
     tLen = getToneLength(tLen);
     if (tFlags & PLAY_NOW || (!busy() && empty())) {
       toneFreq = tFreq;
@@ -245,56 +257,69 @@ void audioQueue::event(uint8_t e, uint8_t f)
           break;
         case AU_FRSKY_WARN1:
           play(BEEP_DEFAULT_FREQ+20,15,5,2);
+          pause(200);
           break;
         case AU_FRSKY_WARN2:
           play(BEEP_DEFAULT_FREQ+30,15,5,2);
+          pause(200);
           break;
         case AU_FRSKY_CHEEP:
           play(BEEP_DEFAULT_FREQ+30,10,2,2,2);
+          pause(200);
           break;
         case AU_FRSKY_RING:
           play(BEEP_DEFAULT_FREQ+25,5,2,10);
           play(BEEP_DEFAULT_FREQ+25,5,10,1);
           play(BEEP_DEFAULT_FREQ+25,5,2,10);
+          pause(200);
           break;
         case AU_FRSKY_SCIFI:
           play(80,10,3,2,-1);
           play(60,10,3,2,1);
           play(70,10,1,0);
+          pause(200);
           break;
         case AU_FRSKY_ROBOT:
           play(70,5,1,1);
           play(50,15,2,1);
           play(80,15,2,1);
+          pause(200);
           break;
         case AU_FRSKY_CHIRP:
           play(BEEP_DEFAULT_FREQ+40,5,1,2);
           play(BEEP_DEFAULT_FREQ+54,5,1,3);
+          pause(200);
           break;
         case AU_FRSKY_TADA:
           play(50,5,5);
           play(90,5,5);
           play(110,3,4,2);
+          pause(200);
           break;
         case AU_FRSKY_CRICKET:
           play(80,5,10,3);
           play(80,5,20,1);
           play(80,5,10,3);
+          pause(200);
           break;
         case AU_FRSKY_SIREN:
           play(10,20,5,2,1);
+          pause(200);
           break;
         case AU_FRSKY_ALARMC:
           play(50,4,10,2);
           play(70,8,20,1);
           play(50,8,10,2);
           play(70,4,20,1);
+          pause(200);
           break;
         case AU_FRSKY_RATATA:
           play(BEEP_DEFAULT_FREQ+50,5,10,10);
+          pause(200);
           break;
         case AU_FRSKY_TICK:
           play(BEEP_DEFAULT_FREQ+50,5,50,2);
+          pause(200);
           break;
         default:
           break;

src/stock/audio.h

@@ -54,7 +54,8 @@ class audioQueue
     audioQueue();
 
     void play(uint8_t tFreq, uint8_t tLen, uint8_t tPause, uint8_t tFlags=0, int8_t tFreqIncr=0);
-
+    void pause(uint8_t tLen);
+    
     inline bool busy() { return (toneTimeLeft > 0); }
 
     void event(uint8_t e, uint8_t f=BEEP_DEFAULT_FREQ);