DCC.cpp

@@ -862,34 +862,15 @@ void DCC::loop()  {
 }
 
 void DCC::issueReminders() {
-  while(true) { 
   // Move to next loco slot.  If occupied, send a reminder.
-  // slot.loco is -1 for deleted locos, 0 for end of list.
+  auto slot = nextLocoReminder;
-  for (auto slot=nextLocoReminder;slot->loco;slot++) {
+  if (slot >= &speedTable[MAX_LOCOS]) slot=&speedTable[0];  // Go to start of table
-    if (slot->loco<0) continue; // deleted loco, skip it
+  if (slot->loco > 0) 
-    if (issueReminder(slot)) {
+    if (!issueReminder(slot)) 
-      nextLocoReminder=slot+1; // remember next one to check
+      return;
-      return; // reminder sent, exit
+  // a loco=0 is at the end of the list, a loco <0 is deleted
-      }
+  if (slot->loco==0) nextLocoReminder = &speedTable[0];
-    }
+  else nextLocoReminder=slot+1;
-    // we have reached the end of the table, so we can move on to 
-    // the next loop state and start from the top.
-    // There are 0-9 loop states..  speed,f1,speed,f2,speed,f3,speed,f4,speed,f5
-    loopStatus++;
-    if (loopStatus>9) loopStatus=0; // reset to 0
-
-    // try looking from the start of the table down to where we started last time
-      
-    for (auto slot=&speedTable[0];slot<nextLocoReminder;slot++) {
-      if (slot->loco<0) continue; // deleted loco, skip it
-      if (issueReminder(slot)) {
-        nextLocoReminder=slot+1; // remember next one to check
-        return; // reminder sent, exit
-        }
-      }
-    // if we get here then we can update the loop status and start again
-    if (loopStatus==0) return; // nothing found at all
-  }
 }
 
 int16_t normalize(byte speed) {
@@ -910,11 +891,7 @@ bool DCC::issueReminder(LOCO * slot) {
   byte flags=slot->groupFlags;
 
   switch (loopStatus) {
-        case 0:
+        case 0: {
-        case 2:
-        case 4:
-        case 6:
-        case 8: {
          // calculate any momentum change going on
          auto sc=slot->speedCode;
          if (slot->targetSpeed!=sc) {
@@ -946,39 +923,34 @@ bool DCC::issueReminder(LOCO * slot) {
           // DIAG(F("Reminder %d speed %d"),loco,slot->speedCode);
           setThrottle2(loco, sc);
         }
-        return true; // reminder sent
+        break;
        case 1: // remind function group 1 (F0-F4)
-          if (flags & FN_GROUP_1) {
+          if (flags & FN_GROUP_1)
       	    setFunctionInternal(loco,0, 128 | ((functions>>1)& 0x0F) | ((functions & 0x01)<<4)); // 100D DDDD
-            return true;  // reminder sent
-          }
           break;
-       case 3: // remind function group 2 F5-F8
+       case 2: // remind function group 2 F5-F8
-          if (flags & FN_GROUP_2) {
+          if (flags & FN_GROUP_2)
   	        setFunctionInternal(loco,0, 176 | ((functions>>5)& 0x0F));                           // 1011 DDDD
-            return true;  // reminder sent
-          }
           break;
-       case 5: // remind function group 3 F9-F12
+       case 3: // remind function group 3 F9-F12
-          if (flags & FN_GROUP_3) {
+          if (flags & FN_GROUP_3)
 	          setFunctionInternal(loco,0, 160 | ((functions>>9)& 0x0F));                           // 1010 DDDD
-            return true;  // reminder sent
-          }
           break;
-       case 7: // remind function group 4 F13-F20
+       case 4: // remind function group 4 F13-F20
-          if (flags & FN_GROUP_4) {
+          if (flags & FN_GROUP_4)
 	          setFunctionInternal(loco,222, ((functions>>13)& 0xFF));
-            return true; 
-          }
           break;
-       case 9: // remind function group 5 F21-F28
+       case 5: // remind function group 5 F21-F28
-          if (flags & FN_GROUP_5) {
+          if (flags & FN_GROUP_5)
 	          setFunctionInternal(loco,223, ((functions>>21)& 0xFF));
-            return true;  // reminder sent
-          }
           break;
       }
-      return false; // no reminder sent 
+      loopStatus++;
+      // if we reach status 6 then this loco is done so
+      // reset status to 0 for next loco and return true so caller
+      // moves on to next loco.
+      if (loopStatus>5) loopStatus=0;
+      return loopStatus==0;
     }
 
 

DCCWaveform.cpp

@@ -159,7 +159,7 @@ void DCCWaveform::interrupt2() {
     // 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<12 && remainingPreambles>1;
+    reminderWindowOpen=transmitRepeats==0 && remainingPreambles<10 && remainingPreambles>1;
     if (remainingPreambles==1)
       promotePendingPacket();
 

version.h

@@ -3,8 +3,7 @@
 
 #include "StringFormatter.h"
 
-#define VERSION "5.5.23"
+#define VERSION "5.5.22"
-// 5.5.23 - Reminder loop Idle packet optimization
 // 5.5.22 - (5.4.9) Handle non-compliant decoders returning 255 for cv 20 and confusing <R> with bad consist addresses.
 //        - DCC 5mS gap to same loco DCC packet restriction
 //        - Catch up MASTER for ESP32 IDF version check