Version 5.5.4

ESTOPALL, XPOM
ONBLOCKENTER, ONBLOCKEXIT
Bug fixes for direction/speed sync

DCCEXParser.cpp

@@ -64,8 +64,8 @@ Once a new OPCODE is decided upon, update this list.
   I, Turntable object command, control, and broadcast
   j, Throttle responses
   J, Throttle queries
-  k, Reserved for future use - Potentially Railcom
-  K, Reserved for future use - Potentially Railcom
+  k, Block exit  (Railcom)
+  K, Block enter (Railcom)
   l, Loco speedbyte/function map broadcast
   L, Reserved for LCC interface (implemented in EXRAIL)
   m, message to throttles (broadcast output) 
@@ -1223,6 +1223,10 @@ bool DCCEXParser::parseD(Print *stream, int16_t params, int16_t p[])
         return true;
 
 #ifdef HAS_ENOUGH_MEMORY
+    case "RAILCOM"_hk: // <D RAILCOM ON/OFF>
+        Diag::RAILCOM = onOff;
+        return true;
+
     case "WIFI"_hk: // <D WIFI ON/OFF>
         Diag::WIFI = onOff;
         return true;

DCCTimerAVR.cpp

@@ -2,7 +2,7 @@
  *  © 2021 Mike S
  *  © 2021-2023 Harald Barth
  *  © 2021 Fred Decker
- *  © 2021 Chris Harlow
+ *  © 2021-2025 Chris Harlow
  *  © 2021 David Cutting
  *  All rights reserved.
  *  
@@ -57,66 +57,59 @@ void DCCTimer::begin(INTERRUPT_CALLBACK callback) {
     TCCR1B = _BV(WGM13) | _BV(CS10);     // Mode 8, clock select 1
     TIMSK1 = _BV(TOIE1); // Enable Software interrupt
     interrupts();
+//diagnostic    pinMode(4,OUTPUT);
   }
 
 
 void DCCTimer::startRailcomTimer(byte brakePin) {
+  (void) brakePin; // Ignored... works on pin 9 only 
+  // diagnostic digitalWrite(4,HIGH);   
+
   /* The Railcom timer is started in such a way that it 
-     - First triggers 28uS after the last TIMER1 tick. 
+     - First triggers 58+29 uS after the previous TIMER1 tick. 
        This provides an accurate offset (in High Accuracy mode)
        for the start of the Railcom cutout.
-     - Sets the Railcom pin high at first tick, 
-       because its been setup with 100% PWM duty cycle.
+     - Sets the Railcom pin high at first tick and subsequent ticks 
+       until its reset to setting pin 9 low at next tick.
         
      - Cycles at 436uS so the second tick is the 
         correct distance from the cutout.
         
-     - Waveform code is responsible for altering the PWM 
-       duty cycle to 0% any time between the first and last tick.
+     - Waveform code is responsible for resetting 
+       any time between the first and second tick.
        (there will be 7 DCC timer1 ticks in which to do this.)
     
     */
-  (void) brakePin; // Ignored... works on pin 9 only 
   const int cutoutDuration = 430; // Desired interval in microseconds
-  
-  // Set up Timer2 for CTC mode (Clear Timer on Compare Match)
-  TCCR2A = 0; // Clear Timer2 control register A
-  TCCR2B = 0; // Clear Timer2 control register B
-  TCNT2 = 0;  // Initialize Timer2 counter value to 0
-   // Configure Phase and Frequency Correct PWM mode
-   TCCR2A =  (1 << COM2B1); // enable pwm on pin 9
-   TCCR2A |= (1 << WGM20);
-  
+  const int cycle=cutoutDuration/2;
    
-  // Set Timer 2 prescaler to 32
-  TCCR2B = (1 << CS21) | (1 << CS20); // 32 prescaler
-
-  // Set the compare match value for desired interval
-  OCR2A = (F_CPU / 1000000) * cutoutDuration / 64 - 1;
-
-  // Calculate the compare match value for desired duty cycle
-  OCR2B = OCR2A+1;  // set duty cycle to 100%= OCR2A)
-
+  const byte RailcomFudge0=58+58+29;
+  
+  // Set Timer2 to CTC mode with set on compare match
+  TCCR2A = (1 << WGM21) | (1 << COM2B0) | (1 << COM2B1);
+  // Prescaler of 32
+  TCCR2B =  (1 << CS21) | (1 << CS20); 
+  OCR2A = cycle-1; // Compare match value for 430 uS
   // Enable Timer2 output on pin 9 (OC2B)
   DDRB |= (1 << DDB1);
-  // TODO Fudge TCNT2 to sync with last tcnt1 tick + 28uS
 
+  // RailcomFudge2 is the expected time from idealised 
+  // setup call (at previous DCC timer interrupt) to the cutout. 
+  // This value should be reduced to reflect the Timer1 value
+  // measuring the time since the previous hardware interrupt
+  byte tcfudge=TCNT1/16; 
+  TCNT2=cycle-RailcomFudge0/2+tcfudge/2;
+
+  
  // Previous TIMER1 Tick was at rising end-of-packet bit
  // Cutout starts half way through first preamble
  // that is 2.5 * 58uS later.
- // TCNT1 ticks 8 times / microsecond
- // auto microsendsToFirstRailcomTick=(58+58+29)-(TCNT1/8);
-  // set the railcom timer counter allowing for phase-correct
-
-  // CHris's NOTE: 
-  // I dont kniow quite how this calculation works out but
-  // it does seems to get a good answer. 
-
-  TCNT2=193 + (ICR1 - TCNT1)/8;
-}
+  }
 
 void DCCTimer::ackRailcomTimer() {
-  OCR2B= 0x00;  // brake pin pwm duty cycle 0 at next tick
+  // Change Timer2 to CTC mode with RESET pin 9 on next compare match
+  TCCR2A = (1 << WGM21) | (1 << COM2B1);
+  // diagnostic digitalWrite(4,LOW);
 }
 
 

DCCWaveform.cpp

@@ -24,14 +24,13 @@
 #ifndef ARDUINO_ARCH_ESP32
   // This code is replaced entirely on an ESP32
 #include <Arduino.h>
-
 #include "DCCWaveform.h"
 #include "TrackManager.h"
 #include "DCCTimer.h"
 #include "DCCACK.h"
 #include "DIAG.h"
 
-
+bool DCCWaveform::cutoutNextTime=false;
 DCCWaveform  DCCWaveform::mainTrack(PREAMBLE_BITS_MAIN, true);
 DCCWaveform  DCCWaveform::progTrack(PREAMBLE_BITS_PROG, false);
 
@@ -71,9 +70,18 @@ void DCCWaveform::loop() {
 
 #pragma GCC push_options
 #pragma GCC optimize ("-O3")
+
 void DCCWaveform::interruptHandler() {
   // call the timer edge sensitive actions for progtrack and maintrack
   // member functions would be cleaner but have more overhead
+  #if defined(HAS_ENOUGH_MEMORY)
+  if (cutoutNextTime) {
+    cutoutNextTime=false;
+    railcomSampleWindow=false; // about to cutout, stop reading railcom data.
+    railcomCutoutCounter++;
+    DCCTimer::startRailcomTimer(9);
+  }
+  #endif
   byte sigMain=signalTransform[mainTrack.state];
   byte sigProg=TrackManager::progTrackSyncMain? sigMain : signalTransform[progTrack.state];
   
@@ -115,19 +123,24 @@ DCCWaveform::DCCWaveform( byte preambleBits, bool isMain) {
   bytes_sent = 0;
   bits_sent = 0;
 }
-    
+
+bool DCCWaveform::railcomPossible=false;     // High accuracy only    
 volatile bool DCCWaveform::railcomActive=false;     // switched on by user
 volatile bool DCCWaveform::railcomDebug=false;     // switched on by user
+volatile bool DCCWaveform::railcomSampleWindow=false; // true during packet transmit
+volatile byte DCCWaveform::railcomCutoutCounter=0;    // cyclic cutout
+volatile byte DCCWaveform::railcomLastAddressHigh=0;
+volatile byte DCCWaveform::railcomLastAddressLow=0;
 
 bool DCCWaveform::setRailcom(bool on, bool debug) {
-  if (on) {
-    // TODO check possible
+  if (on && railcomPossible) {
     railcomActive=true;
     railcomDebug=debug;
   }
   else {
     railcomActive=false;
     railcomDebug=false;
+    railcomSampleWindow=false;
   } 
   return railcomActive;
 }
@@ -140,14 +153,37 @@ void DCCWaveform::interrupt2() {
   //        or WAVE_HIGH_0 for a 0 bit.
   if (remainingPreambles > 0 ) {
     state=WAVE_MID_1;  // switch state to trigger LOW on next interrupt
+    
     remainingPreambles--;
   
     // As we get to the end of the preambles, open the reminder window.
     // This delays any reminder insertion until the last moment so
     // that the reminder doesn't block a more urgent packet. 
-    reminderWindowOpen=transmitRepeats==0 && remainingPreambles<4 && remainingPreambles>1;
-    if (remainingPreambles==1) promotePendingPacket();
-    else if (remainingPreambles==10 && isMainTrack && railcomActive) DCCTimer::ackRailcomTimer();
+    reminderWindowOpen=transmitRepeats==0 && remainingPreambles<10 && remainingPreambles>1;
+    if (remainingPreambles==1)
+      promotePendingPacket();
+
+#if defined(HAS_ENOUGH_MEMORY)   
+    else if (isMainTrack && railcomActive) {
+      if (remainingPreambles==(requiredPreambles-1)) {
+        // First look if we need to start a railcom cutout on next interrupt
+        cutoutNextTime= true;
+      } else if (remainingPreambles==(requiredPreambles-12)) {
+        // cutout has ended so its now possible to poll the railcom detectors
+        // requiredPreambles is one higher that preamble length so
+        // if preamble length is 16 then this evaluates to 5
+        // Remember address bytes of last sent packet so that Railcom can
+        // work out where the channel2 data came from.
+        railcomLastAddressHigh=transmitPacket[0];
+        railcomLastAddressLow =transmitPacket[1];
+        railcomSampleWindow=true;
+      } else if (remainingPreambles==(requiredPreambles-3)) {
+        // cutout can be ended when read
+        // see above for requiredPreambles
+        DCCTimer::ackRailcomTimer();
+      }
+    }
+#endif    
     // Update free memory diagnostic as we don't have anything else to do this time.
     // Allow for checkAck and its called functions using 22 bytes more.
     else DCCTimer::updateMinimumFreeMemoryISR(22); 
@@ -171,13 +207,7 @@ void DCCWaveform::interrupt2() {
       bytes_sent = 0;
       // preamble for next packet will start...
       remainingPreambles = requiredPreambles;
-      
-      // set the railcom coundown to trigger half way 
-      // through the first preamble bit.
-      // Note.. we are still sending the last packet bit
-      //    and we then have to allow for the packet end bit
-      if (isMainTrack && railcomActive) DCCTimer::startRailcomTimer(9);
-      }
+    }
   }  
 }
 #pragma GCC pop_options
@@ -212,7 +242,7 @@ void DCCWaveform::promotePendingPacket() {
         transmitRepeats--;
         return;
       }
-
+    
     if (packetPending) {
         // Copy pending packet to transmit packet
         // a fixed length memcpy is faster than a variable length loop for these small lengths
@@ -230,7 +260,7 @@ void DCCWaveform::promotePendingPacket() {
       // Fortunately reset and idle packets are the same length
       // Note: If railcomDebug is on, then we send resets to the main
       //       track instead of idles. This means that all data will be zeros
-      //       and only the porersets will be ones, making it much
+      //       and only the presets will be ones, making it much
       //       easier to read on a logic analyser.
       memcpy( transmitPacket, (isMainTrack && (!railcomDebug)) ? idlePacket : resetPacket, sizeof(idlePacket));
       transmitLength = sizeof(idlePacket);
@@ -238,93 +268,3 @@ void DCCWaveform::promotePendingPacket() {
       if (getResets() < 250) sentResetsSincePacket++; // only place to increment (private!)
 }
 #endif
-
-#ifdef ARDUINO_ARCH_ESP32
-#include "DCCWaveform.h"
-#include "DCCACK.h"
-
-DCCWaveform  DCCWaveform::mainTrack(PREAMBLE_BITS_MAIN, true);
-DCCWaveform  DCCWaveform::progTrack(PREAMBLE_BITS_PROG, false);
-RMTChannel *DCCWaveform::rmtMainChannel = NULL;
-RMTChannel *DCCWaveform::rmtProgChannel = NULL;
-
-DCCWaveform::DCCWaveform(byte preambleBits, bool isMain) {
-  isMainTrack = isMain;
-  requiredPreambles = preambleBits;
-}
-void DCCWaveform::begin() {
-  for(const auto& md: TrackManager::getMainDrivers()) {
-    pinpair p = md->getSignalPin();
-    if(rmtMainChannel) {
-      //DIAG(F("added pins %d %d to MAIN channel"), p.pin, p.invpin);
-      rmtMainChannel->addPin(p); // add pin to existing main channel
-    } else {
-      //DIAG(F("new MAIN channel with pins %d %d"), p.pin, p.invpin);
-      rmtMainChannel = new RMTChannel(p, true); /* create new main channel */
-    }
-  }
-  MotorDriver *md = TrackManager::getProgDriver();
-  if (md) {
-    pinpair p = md->getSignalPin();
-    if (rmtProgChannel) {
-      //DIAG(F("added pins %d %d to PROG channel"), p.pin, p.invpin);
-      rmtProgChannel->addPin(p); // add pin to existing prog channel
-    } else {
-      //DIAG(F("new PROGchannel with pins %d %d"), p.pin, p.invpin);
-      rmtProgChannel = new RMTChannel(p, false);
-    }
-  }
-}
-
-void DCCWaveform::schedulePacket(const byte buffer[], byte byteCount, byte repeats) {
-  if (byteCount > MAX_PACKET_SIZE) return; // allow for chksum
-  
-  byte checksum = 0;
-  for (byte b = 0; b < byteCount; b++) {
-    checksum ^= buffer[b];
-    pendingPacket[b] = buffer[b];
-  }
-  // buffer is MAX_PACKET_SIZE but pendingPacket is one bigger
-  pendingPacket[byteCount] = checksum;
-  pendingLength = byteCount + 1;
-  pendingRepeats = repeats;
-// DIAG repeated commands (accesories)
-//  if (pendingRepeats > 0)
-//    DIAG(F("Repeats=%d on %s track"), pendingRepeats, isMainTrack ? "MAIN" : "PROG");
-  // The resets will be zero not only now but as well repeats packets into the future
-  clearResets(repeats+1);
-  {
-    int ret = 0;
-    do {
-      if(isMainTrack) {
-	if (rmtMainChannel != NULL)
-	  ret = rmtMainChannel->RMTfillData(pendingPacket, pendingLength, pendingRepeats);
-      } else {
-	if (rmtProgChannel != NULL)
-	  ret = rmtProgChannel->RMTfillData(pendingPacket, pendingLength, pendingRepeats);
-      }
-    } while(ret > 0);
-  }
-}
-
-bool DCCWaveform::isReminderWindowOpen() {
-  if(isMainTrack) {
-    if (rmtMainChannel == NULL)
-      return false;
-    return !rmtMainChannel->busy();
-  } else {
-    if (rmtProgChannel == NULL)
-      return false;
-    return !rmtProgChannel->busy();
-  }
-}
-void IRAM_ATTR DCCWaveform::loop() {
-  DCCACK::checkAck(progTrack.getResets());
-}
-
-bool DCCWaveform::setRailcom(bool on, bool debug) {
-  // TODO... ESP32 railcom waveform
-  return false;
-}
-
-#endif

DCCWaveform.h

@@ -3,7 +3,7 @@
  *  © 2021 Mike S
  *  © 2021 Fred Decker
  *  © 2020-2024 Harald Barth
- *  © 2020-2021 Chris Harlow
+ *  © 2020-2025 Chris Harlow
  *  All rights reserved.
  *  
  *  This file is part of CommandStation-EX
@@ -23,11 +23,8 @@
  */
 #ifndef DCCWaveform_h
 #define DCCWaveform_h
-
-#include "MotorDriver.h"
 #ifdef ARDUINO_ARCH_ESP32
 #include "DCCRMT.h"
-#include "TrackManager.h"
 #endif
 
 
@@ -86,8 +83,30 @@ class DCCWaveform {
     bool isReminderWindowOpen();
     void promotePendingPacket();
     static bool setRailcom(bool on, bool debug);
-    static bool isRailcom() {return railcomActive;}
-    
+    inline static bool isRailcom() {
+      return railcomActive;
+    };
+    inline static byte getRailcomCutoutCounter() {
+      return railcomCutoutCounter;
+    };
+    inline static bool isRailcomSampleWindow() {
+      return railcomSampleWindow;
+    };
+    inline static bool isRailcomPossible() {
+      return railcomPossible;
+    };
+    inline static void setRailcomPossible(bool yes) {
+      railcomPossible=yes;
+      if (!yes) setRailcom(false,false);
+    };
+    inline static uint16_t getRailcomLastLocoAddress() {
+      // first 2 bits 00=short loco, 11=long loco , 01/10 = accessory
+      byte addressType=railcomLastAddressHigh & 0xC0;
+      if (addressType==0xC0) return ((railcomLastAddressHigh & 0x3f)<<8) | railcomLastAddressLow;
+      if (addressType==0x00) return railcomLastAddressHigh & 0x3F;
+      return 0; 
+    }
+
   private:
 #ifndef ARDUINO_ARCH_ESP32
     volatile bool packetPending;
@@ -112,9 +131,13 @@ class DCCWaveform {
     byte pendingPacket[MAX_PACKET_SIZE+1]; // +1 for checksum
     byte pendingLength;
     byte pendingRepeats;
+    static bool railcomPossible; // High accuracy mode only
     static volatile bool railcomActive;     // switched on by user
     static volatile bool railcomDebug;     // switched on by user
-    
+    static volatile bool railcomSampleWindow; // when safe to sample
+    static volatile byte railcomCutoutCounter; // incremented for each cutout
+    static volatile byte railcomLastAddressHigh,railcomLastAddressLow;
+    static bool cutoutNextTime;   // railcom
 #ifdef ARDUINO_ARCH_ESP32
   static RMTChannel *rmtMainChannel;
   static RMTChannel *rmtProgChannel;

DCCWaveformRMT.cpp

@@ -0,0 +1,114 @@
+/*
+ *  © 2021 Neil McKechnie
+ *  © 2021 Mike S
+ *  © 2021 Fred Decker
+ *  © 2020-2022 Harald Barth
+ *  © 2020-2021 Chris Harlow
+ *  All rights reserved.
+ *  
+ *  This file is part of CommandStation-EX
+ *
+ *  This 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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  It 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 CommandStation.  If not, see <https://www.gnu.org/licenses/>.
+ */
+// This code is ESP32 ONLY.  
+#ifdef ARDUINO_ARCH_ESP32
+#include "DCCWaveform.h"
+#include "DCCACK.h"
+#include "TrackManager.h"
+
+DCCWaveform  DCCWaveform::mainTrack(PREAMBLE_BITS_MAIN, true);
+DCCWaveform  DCCWaveform::progTrack(PREAMBLE_BITS_PROG, false);
+RMTChannel *DCCWaveform::rmtMainChannel = NULL;
+RMTChannel *DCCWaveform::rmtProgChannel = NULL;
+
+DCCWaveform::DCCWaveform(byte preambleBits, bool isMain) {
+  isMainTrack = isMain;
+  requiredPreambles = preambleBits;
+}
+void DCCWaveform::begin() {
+  for(const auto& md: TrackManager::getMainDrivers()) {
+    pinpair p = md->getSignalPin();
+    if(rmtMainChannel) {
+      //DIAG(F("added pins %d %d to MAIN channel"), p.pin, p.invpin);
+      rmtMainChannel->addPin(p); // add pin to existing main channel
+    } else {
+      //DIAG(F("new MAIN channel with pins %d %d"), p.pin, p.invpin);
+      rmtMainChannel = new RMTChannel(p, true); /* create new main channel */
+    }
+  }
+  MotorDriver *md = TrackManager::getProgDriver();
+  if (md) {
+    pinpair p = md->getSignalPin();
+    if (rmtProgChannel) {
+      //DIAG(F("added pins %d %d to PROG channel"), p.pin, p.invpin);
+      rmtProgChannel->addPin(p); // add pin to existing prog channel
+    } else {
+      //DIAG(F("new PROGchannel with pins %d %d"), p.pin, p.invpin);
+      rmtProgChannel = new RMTChannel(p, false);
+    }
+  }
+}
+
+void DCCWaveform::schedulePacket(const byte buffer[], byte byteCount, byte repeats) {
+  if (byteCount > MAX_PACKET_SIZE) return; // allow for chksum
+  
+  byte checksum = 0;
+  for (byte b = 0; b < byteCount; b++) {
+    checksum ^= buffer[b];
+    pendingPacket[b] = buffer[b];
+  }
+  // buffer is MAX_PACKET_SIZE but pendingPacket is one bigger
+  pendingPacket[byteCount] = checksum;
+  pendingLength = byteCount + 1;
+  pendingRepeats = repeats;
+// DIAG repeated commands (accesories)
+//  if (pendingRepeats > 0)
+//    DIAG(F("Repeats=%d on %s track"), pendingRepeats, isMainTrack ? "MAIN" : "PROG");
+  // The resets will be zero not only now but as well repeats packets into the future
+  clearResets(repeats+1);
+  {
+    int ret = 0;
+    do {
+      if(isMainTrack) {
+	if (rmtMainChannel != NULL)
+	  ret = rmtMainChannel->RMTfillData(pendingPacket, pendingLength, pendingRepeats);
+      } else {
+	if (rmtProgChannel != NULL)
+	  ret = rmtProgChannel->RMTfillData(pendingPacket, pendingLength, pendingRepeats);
+      }
+    } while(ret > 0);
+  }
+}
+
+bool DCCWaveform::isReminderWindowOpen() {
+  if(isMainTrack) {
+    if (rmtMainChannel == NULL)
+      return false;
+    return !rmtMainChannel->busy();
+  } else {
+    if (rmtProgChannel == NULL)
+      return false;
+    return !rmtProgChannel->busy();
+  }
+}
+void IRAM_ATTR DCCWaveform::loop() {
+  DCCACK::checkAck(progTrack.getResets());
+}
+
+bool DCCWaveform::setRailcom(bool on, bool debug) {
+  // TODO... ESP32 railcom waveform
+  return false;
+}
+
+#endif

EXRAIL2.cpp

@@ -88,6 +88,8 @@ LookList *  RMFT2::onClockLookup=NULL;
 LookList *  RMFT2::onRotateLookup=NULL;
 #endif
 LookList *  RMFT2::onOverloadLookup=NULL;
+LookList *  RMFT2::onBlockEnterLookup=NULL;
+LookList *  RMFT2::onBlockExitLookup=NULL;
 byte * RMFT2::routeStateArray=nullptr; 
 const FSH  * * RMFT2::routeCaptionArray=nullptr; 
 int16_t * RMFT2::stashArray=nullptr;
@@ -132,11 +134,11 @@ int16_t LookList::find(int16_t value) {
 void LookList::chain(LookList * chain) {
   m_chain=chain;
 }
-void LookList::handleEvent(const FSH* reason,int16_t id) {
+void LookList::handleEvent(const FSH* reason,int16_t id, int16_t loco) {
   // New feature... create multiple ONhandlers
   for (int i=0;i<m_size;i++) 
     if (m_lookupArray[i]==id)
-       RMFT2::startNonRecursiveTask(reason,id,m_resultArray[i]);
+       RMFT2::startNonRecursiveTask(reason,id,m_resultArray[i],loco);
 }
 
 
@@ -204,6 +206,12 @@ LookList* RMFT2::LookListLoader(OPCODE op1, OPCODE op2, OPCODE op3) {
   onRotateLookup=LookListLoader(OPCODE_ONROTATE);
 #endif
   onOverloadLookup=LookListLoader(OPCODE_ONOVERLOAD);
+
+  if (compileFeatures & FEATURE_BLOCK) {
+    onBlockEnterLookup=LookListLoader(OPCODE_ONBLOCKENTER);
+    onBlockExitLookup=LookListLoader(OPCODE_ONBLOCKEXIT);
+  }
+
   // onLCCLookup is not the same so not loaded here. 
 
   // Second pass startup, define any turnouts or servos, set signals red
@@ -380,7 +388,7 @@ char RMFT2::getRouteType(int16_t id) {
 }
 
 
-RMFT2::RMFT2(int progCtr) {
+RMFT2::RMFT2(int progCtr, int16_t _loco) {
   progCounter=progCtr;
 
   // get an unused  task id from the flags table
@@ -393,9 +401,7 @@ RMFT2::RMFT2(int progCtr) {
     }
   }
   delayTime=0;
-  loco=0;
-  speedo=0;
-  forward=true;
+  loco=_loco;
   invert=false;
   blinkState=not_blink_task;
   stackDepth=0;
@@ -413,7 +419,10 @@ RMFT2::RMFT2(int progCtr) {
 
 
 RMFT2::~RMFT2() {
-  driveLoco(1); // ESTOP my loco if any
+  // estop my loco if this is not an ONevent 
+  // (prevents DONE stopping loco at the end of an
+  //   ONBLOCKENTER or ONBLOCKEXIT )
+  if (loco>0 && this->onEventStartPosition==-1) DCC::setThrottle(loco,1,DCC::getThrottleDirection(loco));
   setFlag(taskId,0,TASK_FLAG); // we are no longer using this id
   if (next==this)
     loopTask=NULL;
@@ -429,23 +438,9 @@ RMFT2::~RMFT2() {
 void RMFT2::createNewTask(int route, uint16_t cab) {
       int pc=routeLookup->find(route);
       if (pc<0) return;
-      RMFT2* task=new RMFT2(pc);
-      task->loco=cab;
+      new RMFT2(pc,cab);
 }
 
-void RMFT2::driveLoco(byte speed) {
-  if (loco<=0) return;  // Prevent broadcast!
-  //if (diag) DIAG(F("EXRAIL drive %d %d %d"),loco,speed,forward^invert);
- /* TODO.....
- power on appropriate track if DC or main if dcc
-  if (TrackManager::getMainPowerMode()==POWERMODE::OFF) {
-    TrackManager::setMainPower(POWERMODE::ON);
-  }
-  **********/
-
-  DCC::setThrottle(loco,speed, forward^invert);
-  speedo=speed;
-}
 
 bool RMFT2::readSensor(uint16_t sensorId) {
   // Exrail operands are unsigned but we need the signed version as inserted by the macros.
@@ -500,7 +495,7 @@ bool RMFT2::skipIfBlock() {
   if (cv & LONG_ADDR_MARKER) {               // maker bit indicates long addr
     progtrackLocoId = cv ^ LONG_ADDR_MARKER; // remove marker bit to get real long addr
     if (progtrackLocoId <= HIGHEST_SHORT_ADDR ) {     // out of range for long addr
-      DIAG(F("Long addr %d <= %d unsupported"), progtrackLocoId, HIGHEST_SHORT_ADDR);
+      DIAG(F("Long addr %d <= %d unsupported\n"), progtrackLocoId, HIGHEST_SHORT_ADDR);
       progtrackLocoId = -1;
     }
   } else {
@@ -508,6 +503,15 @@ bool RMFT2::skipIfBlock() {
   }
 }
 
+void RMFT2::pause() {
+  if (loco)
+    pauseSpeed=DCC::getThrottleSpeedByte(loco);
+}
+void RMFT2::resume() {
+  if (loco)
+    DCC::setThrottle(loco,pauseSpeed & 0x7f, pauseSpeed & 0x80);
+}
+
 void RMFT2::loop() {
   if (compileFeatures & FEATURE_SENSOR) 
       EXRAILSensor::checkAll();
@@ -572,24 +576,25 @@ void RMFT2::loop2() {
 #endif
 
   case OPCODE_REV:
-    forward = false;
-    driveLoco(operand);
+    if (loco) DCC::setThrottle(loco,operand,invert);
     break;
     
   case OPCODE_FWD:
-      forward = true;
-      driveLoco(operand);
-      break;
+    if (loco) DCC::setThrottle(loco,operand,!invert);
+    break;
       
   case OPCODE_SPEED:
-    forward=DCC::getThrottleDirection(loco)^invert;
-    driveLoco(operand);
+    if (loco) DCC::setThrottle(loco,operand,DCC::getThrottleDirection(loco));
     break;
   
   case OPCODE_MOMENTUM:
     DCC::setMomentum(loco,operand,getOperand(1));
     break;
     
+  case OPCODE_ESTOPALL:
+    DCC::setThrottle(0,1,1); // all locos speed=1
+    break;
+    
   case OPCODE_FORGET:
     if (loco!=0) {
       DCC::forgetLoco(loco);
@@ -599,12 +604,11 @@ void RMFT2::loop2() {
 
   case OPCODE_INVERT_DIRECTION:
     invert= !invert;
-    driveLoco(speedo);
     break;
     
   case OPCODE_RESERVE:
     if (getFlag(operand,SECTION_FLAG)) {
-      driveLoco(0);
+      if (loco) DCC::setThrottle(loco,1,DCC::getThrottleDirection(loco));
       delayMe(500);
       return;
     }
@@ -711,6 +715,10 @@ void RMFT2::loop2() {
     if (loco) DCC::writeCVByteMain(loco, operand, getOperand(1));
     break;
 
+  case OPCODE_XPOM:
+    DCC::writeCVByteMain(operand, getOperand(1), getOperand(2));
+    break;
+
   case OPCODE_POWEROFF:
     TrackManager::setPower(POWERMODE::OFF);
     TrackManager::setJoin(false);
@@ -747,8 +755,8 @@ void RMFT2::loop2() {
 
   case OPCODE_RESUME:
     pausingTask=NULL;
-    driveLoco(speedo);
-    for (RMFT2 * t=next; t!=this;t=t->next) if (t->loco >0) t->driveLoco(t->speedo);
+    resume();
+    for (RMFT2 * t=next; t!=this;t=t->next) t->resume();
     break;
     
   case OPCODE_IF: // do next operand if sensor set
@@ -859,8 +867,7 @@ void RMFT2::loop2() {
     
   case OPCODE_DRIVE:
     {
-      byte analogSpeed=IODevice::readAnalogue(operand) *127 / 1024;
-      if (speedo!=analogSpeed) driveLoco(analogSpeed);
+      // Non functional but reserved 
       break;
     }
     
@@ -958,8 +965,6 @@ void RMFT2::loop2() {
     // which is intended so it can be checked
     // from within EXRAIL
     loco=progtrackLocoId;
-    speedo=0;
-    forward=true;
     invert=false;
     break;
 #endif
@@ -981,16 +986,13 @@ void RMFT2::loop2() {
     {
       int newPc=routeLookup->find(getOperand(1));
       if (newPc<0) break;
-      RMFT2* newtask=new RMFT2(newPc); // create new task
-      newtask->loco=operand;
+      new RMFT2(newPc,operand); // create new task
     }
     break;
     
   case OPCODE_SETLOCO:
     {
       loco=operand;
-      speedo=0;
-      forward=true;
       invert=false;
     }
     break;
@@ -1124,7 +1126,8 @@ void RMFT2::loop2() {
   case OPCODE_ONROTATE:
 #endif
   case OPCODE_ONOVERLOAD:
-  
+  case OPCODE_ONBLOCKENTER:
+  case OPCODE_ONBLOCKEXIT:
     break;
     
   default:
@@ -1316,6 +1319,14 @@ void RMFT2::activateEvent(int16_t addr, bool activate) {
   else onDeactivateLookup->handleEvent(F("DEACTIVATE"),addr);
 }
 
+void RMFT2::blockEvent(int16_t block, int16_t loco, bool entering) {
+  if (compileFeatures & FEATURE_BLOCK) {
+  // Hunt for an ONBLOCKENTER/ONBLOCKEXIT for this accessory
+  if (entering)  onBlockEnterLookup->handleEvent(F("BLOCKENTER"),block,loco);
+  else onBlockExitLookup->handleEvent(F("BLOCKEXIT"),block,loco);
+  }
+}
+
 void RMFT2::changeEvent(int16_t vpin, bool change) {
   // Hunt for an ONCHANGE for this sensor
   if (change)  onChangeLookup->handleEvent(F("CHANGE"),vpin);
@@ -1371,11 +1382,11 @@ void RMFT2::killBlinkOnVpin(VPIN pin, uint16_t count) {
   }
 }
   
-void RMFT2::startNonRecursiveTask(const FSH* reason, int16_t id,int pc) {  
+void RMFT2::startNonRecursiveTask(const FSH* reason, int16_t id,int pc, uint16_t loco) {  
   // Check we dont already have a task running this handler
   RMFT2 * task=loopTask;
   while(task) {
-    if (task->onEventStartPosition==pc) {
+    if (task->onEventStartPosition==pc && task->loco==loco) {
       DIAG(F("Recursive ON%S(%d)"),reason, id);
       return;
     }
@@ -1383,7 +1394,7 @@ void RMFT2::startNonRecursiveTask(const FSH* reason, int16_t id,int pc) {
     if (task==loopTask) break;
   }
   
-  task=new RMFT2(pc);  // new task starts at this instruction
+  task=new RMFT2(pc,loco);  // new task starts at this instruction
   task->onEventStartPosition=pc; // flag for recursion detector
 }
 

EXRAIL2.h

@@ -77,8 +77,10 @@ enum OPCODE : byte {OPCODE_THROW,OPCODE_CLOSE,OPCODE_TOGGLE_TURNOUT,
              OPCODE_ROUTE_ACTIVE,OPCODE_ROUTE_INACTIVE,OPCODE_ROUTE_HIDDEN,
              OPCODE_ROUTE_DISABLED,
              OPCODE_STASH,OPCODE_CLEAR_STASH,OPCODE_CLEAR_ALL_STASH,OPCODE_PICKUP_STASH,
-             OPCODE_ONBUTTON,OPCODE_ONSENSOR,             
+             OPCODE_ONBUTTON,OPCODE_ONSENSOR,
              OPCODE_NEOPIXEL,
+             OPCODE_ONBLOCKENTER,OPCODE_ONBLOCKEXIT,
+             OPCODE_ESTOPALL,OPCODE_XPOM,
              // OPcodes below this point are skip-nesting IF operations
              // placed here so that they may be skipped as a group
              // see skipIfBlock()
@@ -138,6 +140,7 @@ enum SignalType {
   static const byte FEATURE_STASH = 0x08;
   static const byte FEATURE_BLINK = 0x04;
   static const byte FEATURE_SENSOR = 0x02;
+  static const byte FEATURE_BLOCK = 0x01;
   
  
   // Flag bits for status of hardware and TPL
@@ -164,7 +167,7 @@ class LookList {
     int16_t findPosition(int16_t value); // finds index 
     int16_t size();
     void stream(Print * _stream); 
-    void handleEvent(const FSH* reason,int16_t id);
+    void handleEvent(const FSH* reason,int16_t id, int16_t loco=0);
 
   private:
      int16_t m_size;
@@ -178,8 +181,7 @@ class LookList {
    public:
     static void begin();
     static void loop();
-    RMFT2(int progCounter);
-    RMFT2(int route, uint16_t cab);
+    RMFT2(int progCounter, int16_t cab=0);
     ~RMFT2();
     static void readLocoCallback(int16_t cv);
     static void createNewTask(int route, uint16_t cab);
@@ -189,6 +191,7 @@ class LookList {
     static void clockEvent(int16_t clocktime, bool change);
     static void rotateEvent(int16_t id, bool change);
     static void powerEvent(int16_t track, bool overload);
+    static void blockEvent(int16_t block, int16_t loco, bool entering);
     static bool signalAspectEvent(int16_t address, byte aspect );    
     // Throttle Info Access functions built by exrail macros 
   static const byte rosterNameCount;
@@ -202,7 +205,7 @@ class LookList {
   static const FSH *  getRosterFunctions(int16_t id);
   static const FSH *  getTurntableDescription(int16_t id);
   static const FSH *  getTurntablePositionDescription(int16_t turntableId, uint8_t positionId);
-  static void startNonRecursiveTask(const FSH* reason, int16_t id,int pc);
+  static void startNonRecursiveTask(const FSH* reason, int16_t id,int pc, uint16_t loco=0);
   static bool readSensor(uint16_t sensorId);
   static bool isSignal(int16_t id,char rag);
   static SIGNAL_DEFINITION getSignalSlot(int16_t slotno); 
@@ -226,7 +229,6 @@ private:
     static RMFT2 * loopTask;
     static RMFT2 * pausingTask;
     void delayMe(long millisecs);
-    void driveLoco(byte speedo);
     bool skipIfBlock();
     bool readLoco();
     void loop2();
@@ -235,6 +237,8 @@ private:
     void printMessage2(const FSH * msg);
     void thrungeString(uint32_t strfar, thrunger mode, byte id=0);
     uint16_t getOperand(byte n); 
+    void pause();
+    void resume();
     
    static bool diag;
    static const  HIGHFLASH3  byte RouteCode[];
@@ -256,6 +260,9 @@ private:
    static LookList * onRotateLookup;
 #endif
    static LookList * onOverloadLookup;
+   static LookList * onBlockEnterLookup;
+   static LookList * onBlockExitLookup;
+   
    
    static const int countLCCLookup;
    static int onLCCLookup[];
@@ -280,9 +287,8 @@ private:
     byte  taskId;
     BlinkState blinkState; // includes AT_TIMEOUT flag. 
     uint16_t loco;
-    bool forward;
     bool invert;
-    byte speedo;
+    byte pauseSpeed;
     int onEventStartPosition;
     byte stackDepth;
     int callStack[MAX_STACK_DEPTH];

EXRAIL2MacroReset.h

@@ -61,6 +61,7 @@
 #undef ENDIF  
 #undef ENDTASK
 #undef ESTOP
+#undef ESTOPALL
 #undef EXRAIL
 #undef EXTT_TURNTABLE
 #undef FADE
@@ -112,6 +113,8 @@
 #undef ONACTIVATE
 #undef ONACTIVATEL
 #undef ONAMBER
+#undef ONBLOCKENTER
+#undef ONBLOCKEXIT
 #undef ONDEACTIVATE
 #undef ONDEACTIVATEL 
 #undef ONCLOSE
@@ -196,6 +199,7 @@
 #undef XFOFF
 #undef XFON
 #undef XFTOGGLE
+#undef XPOM
 #undef XREV
 #undef XFWD
 
@@ -236,6 +240,7 @@
 #define ENDIF  
 #define ENDTASK
 #define ESTOP 
+#define ESTOPALL
 #define EXRAIL
 #define EXTT_TURNTABLE(id,vpin,home,description...)
 #define FADE(pin,value,ms)
@@ -286,6 +291,8 @@
 #define ONACTIVATE(addr,subaddr)
 #define ONACTIVATEL(linear)
 #define ONAMBER(signal_id) 
+#define ONBLOCKENTER(blockid)
+#define ONBLOCKEXIT(blockid)
 #define ONTIME(value)
 #define ONCLOCKTIME(hours,mins)
 #define ONCLOCKMINS(mins)
@@ -372,5 +379,5 @@
 #define XFTOGGLE(cab,func)
 #define XFWD(cab,speed)
 #define XREV(cab,speed)
-
+#define XPOM(cab,cv,value)
 #endif

EXRAIL2Parser.cpp

@@ -210,6 +210,15 @@ void RMFT2::ComandFilter(Print * stream, byte & opcode, byte & paramCount, int16
         default:
             break;
         }
+	break;
+
+  case 'K': // <K blockid loco>  Block enter
+  case 'k': // <k blockid loco>  Block exit
+        if (paramCount!=2) break;
+        blockEvent(p[0],p[1],opcode=='K');
+        opcode=0;
+        break; 
+  
   default:  // other commands pass through
     break;
   }
@@ -228,11 +237,9 @@ bool RMFT2::parseSlash(Print * stream, byte & paramCount, int16_t p[]) {
 			    );
       }
       else {
-      StringFormatter::send(stream,F("\nID=%d,PC=%d,LOCO=%d%c,SPEED=%d%c"),
+      StringFormatter::send(stream,F("\nID=%d,PC=%d,LOCO=%d %c"),
 			    (int)(task->taskId),task->progCounter,task->loco,
-			    task->invert?'I':' ',
-			    task->speedo,
-			    task->forward?'F':'R'
+			    task->invert?'I':' '
 			    );
       }
       task=task->next;
@@ -276,6 +283,14 @@ bool RMFT2::parseSlash(Print * stream, byte & paramCount, int16_t p[]) {
   switch (p[0]) {
   case "PAUSE"_hk: // </ PAUSE>
     if (paramCount!=1) return false;
+    { // pause all tasks 
+      RMFT2 * task=loopTask;
+      while(task) {
+	      task->pause();
+	      task=task->next;
+	      if (task==loopTask) break;
+      }
+    }
     DCC::estopAll();  // pause all locos on the track
     pausingTask=(RMFT2 *)1; // Impossible task address
     return true;
@@ -283,12 +298,12 @@ bool RMFT2::parseSlash(Print * stream, byte & paramCount, int16_t p[]) {
   case "RESUME"_hk: // </ RESUME>
     if (paramCount!=1) return false;
     pausingTask=NULL;
-    {
+    { // resume all tasks
       RMFT2 * task=loopTask;
       while(task) {
-	if (task->loco) task->driveLoco(task->speedo);
-	task=task->next;
-	if (task==loopTask) break;
+	      task->resume();
+	      task=task->next;
+	      if (task==loopTask) break;
       }
     }
     return true;
@@ -301,8 +316,7 @@ bool RMFT2::parseSlash(Print * stream, byte & paramCount, int16_t p[]) {
       uint16_t cab=(paramCount==2)? 0 : p[1];
       int pc=routeLookup->find(route);
       if (pc<0) return false;
-      RMFT2* task=new RMFT2(pc);
-      task->loco=cab;
+      new RMFT2(pc,cab);
     }
     return true;
     

EXRAILMacros.h

@@ -231,6 +231,10 @@ bool exrailHalSetup() {
 #define ONBUTTON(vpin) | FEATURE_SENSOR
 #undef ONSENSOR
 #define ONSENSOR(vpin) | FEATURE_SENSOR
+#undef ONBLOCKENTER
+#define ONBLOCKENTER(blockid) | FEATURE_BLOCK
+#undef ONBLOCKEXIT
+#define ONBLOCKEXIT(blockid) | FEATURE_BLOCK
 
 const byte RMFT2::compileFeatures = 0
    #include "myAutomation.h"
@@ -513,6 +517,7 @@ int RMFT2::onLCCLookup[RMFT2::countLCCLookup];
 #define ENDIF  OPCODE_ENDIF,0,0,
 #define ENDTASK OPCODE_ENDTASK,0,0,
 #define ESTOP OPCODE_SPEED,V(1), 
+#define ESTOPALL OPCODE_ESTOPALL,0,0, 
 #define EXRAIL
 #ifndef IO_NO_HAL
 #define EXTT_TURNTABLE(id,vpin,home,description...) OPCODE_EXTTTURNTABLE,V(id),OPCODE_PAD,V(vpin),OPCODE_PAD,V(home),
@@ -576,6 +581,8 @@ int RMFT2::onLCCLookup[RMFT2::countLCCLookup];
 #define ONACTIVATE(addr,subaddr) OPCODE_ONACTIVATE,V(addr<<2|subaddr),
 #define ONACTIVATEL(linear) OPCODE_ONACTIVATE,V(linear+3),
 #define ONAMBER(signal_id) OPCODE_ONAMBER,V(signal_id),
+#define ONBLOCKENTER(block_id) OPCODE_ONBLOCKENTER,V(block_id),
+#define ONBLOCKEXIT(block_id) OPCODE_ONBLOCKEXIT,V(block_id),
 #define ONCLOSE(turnout_id) OPCODE_ONCLOSE,V(turnout_id),
 #define ONLCC(sender,event) OPCODE_ONLCC,V(event),\
         OPCODE_PAD,V((((uint64_t)sender)>>32)&0xFFFF),\
@@ -669,6 +676,7 @@ int RMFT2::onLCCLookup[RMFT2::countLCCLookup];
 #define XFTOGGLE(cab,func) OPCODE_XFTOGGLE,V(cab),OPCODE_PAD,V(func),
 #define XFWD(cab,speed) OPCODE_XFWD,V(cab),OPCODE_PAD,V(speed),
 #define XREV(cab,speed) OPCODE_XREV,V(cab),OPCODE_PAD,V(speed),
+#define XPOM(cab,cv,value) OPCODE_XPOM,V(cab),OPCODE_PAD,V(cv),OPCODE_PAD,V(value),
 
 // Build RouteCode
 const int StringMacroTracker2=__COUNTER__;

StringFormatter.cpp

@@ -1,5 +1,5 @@
 /*
- *  © 2020, Chris Harlow. All rights reserved.
+ *  © 2020=2025, Chris Harlow. All rights reserved.
  *  
  *  This file is part of Asbelos DCC API
  *
@@ -27,6 +27,8 @@ bool Diag::WIFI=false;
 bool Diag::WITHROTTLE=false;
 bool Diag::ETHERNET=false;
 bool Diag::LCN=false;
+bool Diag::RAILCOM=false;
+
 
  
 void StringFormatter::diag( const FSH* input...) {

StringFormatter.h

@@ -1,5 +1,5 @@
 /*
- *  © 2020, Chris Harlow. All rights reserved.
+ *  © 2020-2025, Chris Harlow. All rights reserved.
  *  
  *  This file is part of Asbelos DCC API
  *
@@ -30,6 +30,7 @@ class Diag {
   static bool WITHROTTLE;
   static bool ETHERNET;
   static bool LCN;
+  static bool RAILCOM;
   
 };
 

TrackManager.cpp

@@ -332,7 +332,8 @@ bool TrackManager::setTrackMode(byte trackToSet, TRACK_MODE mode, int16_t dcAddr
 	canDo &= track[t]->trackPWM;
       }
     }
-    if (!canDo) {
+    if (canDo) DIAG(F("HA mode")); 
+    else {
       // if we discover that HA mode was globally impossible
       // we must adjust the trackPWM capabilities
       FOR_EACH_TRACK(t) {
@@ -341,6 +342,7 @@ bool TrackManager::setTrackMode(byte trackToSet, TRACK_MODE mode, int16_t dcAddr
       }
       DCCTimer::clearPWM(); // has to be AFTER trackPWM changes because if trackPWM==true this is undone for  that track
     }
+    DCCWaveform::setRailcomPossible(canDo);
 #else
     // For ESP32 we just reinitialize the DCC Waveform
     DCCWaveform::begin();

version.h

@@ -3,7 +3,13 @@
 
 #include "StringFormatter.h"
 
-#define VERSION "5.5.2"
+#define VERSION "5.5.4"
+// 5.5.4  - Split ESP32 from DCCWaveform to DCCWaveformRMT
+//        - Railcom Cutout control (DCCTimerAVR Mega only so far) 
+// 5.5.3  - EXRAIL ESTOPALL,XPOM, 
+//        - Bugfix RESERVE to cause ESTOP.(was STOP)
+//        - Correct direction sync after manual throttle change. 
+//        - plus ONBLOCKENTER/EXIT in preparation for Railcom
 // 5.5.2  - DS1307 Real Time clock 
 // 5.5.1  - Momentum 
 // 5.5.0  - New version on devel