move call to CommandDistributor::broadcastPower() into the TrackManager::setTrackPower(*) functions

CommandDistributor.cpp

@@ -283,7 +283,7 @@ void  CommandDistributor::broadcastPower() {
   //DIAG(F("m=%d p=%d j=%d"), main, prog, join);
   const FSH * reason=F("");
   if (join) {
-    reason = F("JOIN");
+    reason = F(" JOIN"); // with space at start so we can append without space
     broadcastReply(COMMAND_TYPE, F("<p1 %S>\n"),reason);
   } else {
     if (main) {
@@ -303,7 +303,7 @@ void  CommandDistributor::broadcastPower() {
   broadcastReply(WITHROTTLE_TYPE, F("PPA%c\n"), main?'1': state);
 #endif
 
-  LCD(2,F("Power %S %S"),state=='1'?F("On"): ( state=='0'? F("Off") : F("SC") ),reason);
+  LCD(2,F("Power %S%S"),state=='1'?F("On"): ( state=='0'? F("Off") : F("SC") ),reason);
 }
 
 void CommandDistributor::broadcastRaw(clientType type, char * msg) {

DCCEXParser.cpp

@@ -587,7 +587,6 @@ void DCCEXParser::parseOne(Print *stream, byte *com, RingStream * ringStream)
             }
 	    else break; // will reply <X>
 	  }
-	  CommandDistributor::broadcastPower();
 	  //TrackManager::streamTrackState(NULL,t);
           
 	  return;
@@ -619,7 +618,6 @@ void DCCEXParser::parseOne(Print *stream, byte *com, RingStream * ringStream)
 	    }
 	    else break; // will reply <X>
 	  }
-	  CommandDistributor::broadcastPower();
 	  return;
 	}
 

EXRAIL2.cpp

@@ -414,7 +414,6 @@ void RMFT2::driveLoco(byte speed) {
  power on appropriate track if DC or main if dcc
   if (TrackManager::getMainPowerMode()==POWERMODE::OFF) {
     TrackManager::setMainPower(POWERMODE::ON);
-    CommandDistributor::broadcastPower();
   }
   **********/
 
@@ -642,7 +641,6 @@ void RMFT2::loop2() {
   case OPCODE_POWEROFF:
     TrackManager::setPower(POWERMODE::OFF);
     TrackManager::setJoin(false);
-    CommandDistributor::broadcastPower();
     break;
   
   case OPCODE_SET_POWER:
@@ -837,12 +835,10 @@ void RMFT2::loop2() {
   case OPCODE_JOIN:
     TrackManager::setPower(POWERMODE::ON);
     TrackManager::setJoin(true);
-    CommandDistributor::broadcastPower();
     break;
 
   case OPCODE_UNJOIN:
     TrackManager::setJoin(false);
-    CommandDistributor::broadcastPower();
     break;
 
   case OPCODE_READ_LOCO1: // READ_LOCO is implemented as 2 separate opcodes
@@ -870,7 +866,6 @@ void RMFT2::loop2() {
   case OPCODE_POWERON:
     TrackManager::setMainPower(POWERMODE::ON);
     TrackManager::setJoin(false);
-    CommandDistributor::broadcastPower();
     break;
     
   case OPCODE_START:

TrackManager.cpp

@@ -489,10 +489,13 @@ std::vector<MotorDriver *>TrackManager::getMainDrivers() {
 
 // Set track power for all tracks with this mode
 void TrackManager::setTrackPower(TRACK_MODE trackmodeToMatch, POWERMODE powermode) {
+  bool didChange=false;
   FOR_EACH_TRACK(t) {
     MotorDriver *driver=track[t];
     TRACK_MODE trackmodeOfTrack = driver->getMode();
     if (trackmodeToMatch & trackmodeOfTrack) {
+      if (powermode != driver->getPower())
+	didChange=true;
       if (powermode == POWERMODE::ON) {
 	if (trackmodeOfTrack & TRACK_MODE_DC) {
 	  driver->setBrake(true);   // DC starts with brake on
@@ -507,12 +510,15 @@ void TrackManager::setTrackPower(TRACK_MODE trackmodeToMatch, POWERMODE powermod
       driver->setPower(powermode);
     }
   }
+  if (didChange)
+    CommandDistributor::broadcastPower();
 }
 
 // Set track power for this track, inependent of mode
 void TrackManager::setTrackPower(POWERMODE powermode, byte t) {
   MotorDriver *driver=track[t]; 
   TRACK_MODE trackmode = driver->getMode();
+  POWERMODE oldpower = driver->getPower();
   if (trackmode & TRACK_MODE_NONE) {
     driver->setBrake(true);     // Track is unused. Brake is good to have.
     powermode = POWERMODE::OFF; // Track is unused. Force it to OFF
@@ -530,6 +536,8 @@ void TrackManager::setTrackPower(POWERMODE powermode, byte t) {
     }
   }
   driver->setPower(powermode);
+  if (oldpower != driver->getPower())
+    CommandDistributor::broadcastPower();
 }
 
 // returns state of the one and only prog track

WiThrottle.cpp

@@ -150,7 +150,6 @@ void WiThrottle::parse(RingStream * stream, byte * cmdx) {
 	  DCCWaveform::progTrack.setPowerMode(cmd[3]=='1'?POWERMODE::ON:POWERMODE::OFF);
 */
 
-	CommandDistributor::broadcastPower();
       }
 #if defined(EXRAIL_ACTIVE)
       else if (cmd[1]=='R' && cmd[2]=='A' && cmd[3]=='2' ) { // Route activate
@@ -496,7 +495,6 @@ void WiThrottle::getLocoCallback(int16_t locoid) {
   TrackManager::setJoin(true);          // <1 JOIN> so we can drive loco away
   DIAG(F("LocoCallback commit success"));
   stashStream->commit();
-  CommandDistributor::broadcastPower();
 }
 
 void WiThrottle::sendIntro(Print* stream) {