From f994cab0c52e7805781f457a78aeabf568fe093a Mon Sep 17 00:00:00 2001
From: Alex Shepherd <kiwi64ajs@gmail.com>
Date: Sat, 24 Aug 2024 12:39:03 +1200
Subject: [PATCH] Changes the return from NmraDcc::process() to be the number
 of times a DCC Packet is ready to be able to detect DCC packet buffer
 overflow.

---
 NmraDcc.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/NmraDcc.cpp b/NmraDcc.cpp
index 1742e84..cf55056 100644
--- a/NmraDcc.cpp
+++ b/NmraDcc.cpp
@@ -683,7 +683,7 @@ DCC_PROCESSOR_STATE DccProcState ;
                 portENTER_CRITICAL_ISR (&mux);
                 #endif
                 DccRx.PacketCopy = DccRx.PacketBuf ;
-                DccRx.DataReady = 1 ;
+                DccRx.DataReady += 1 ;
                 #ifdef ESP32
                 portEXIT_CRITICAL_ISR (&mux);
                 #endif
@@ -1731,6 +1731,8 @@ void NmraDcc::setAccDecDCCAddrNextReceived (uint8_t enable)
 ////////////////////////////////////////////////////////////////////////
 uint8_t NmraDcc::process()
 {
+	uint8_t	copyDataReady ;
+	
     if (DccProcState.inServiceMode)
     {
         if ( (millis() - DccProcState.LastServiceModeMillis) > 20L)
@@ -1748,6 +1750,7 @@ uint8_t NmraDcc::process()
         noInterrupts();
         #endif
         Msg = DccRx.PacketCopy ;
+        copyDataReady = DccRx.DataReady;
         DccRx.DataReady = 0 ;
 
         #ifdef ESP32
@@ -1765,7 +1768,7 @@ uint8_t NmraDcc::process()
         if (notifyDccMsg) 	notifyDccMsg (&Msg);
 
         execDccProcessor (&Msg);
-        return 1 ;
+        return copyDataReady ;
     }
 
     return 0 ;