Fixed an issue when receiving downlinks in class C window during a class A procedure.

Author: Daniel Jaeckle

src/mac/LoRaMac.c

@@ -842,7 +842,11 @@ static void ProcessRadioRxDone( void )
     MacCtx.McpsIndication.ResponseTimeout = 0;
 
     Radio.Sleep( );
-    TimerStop( &MacCtx.RxWindowTimer2 );
+
+    if( MacCtx.McpsIndication.RxSlot == RX_SLOT_WIN_1 )
+    {
+        TimerStop( &MacCtx.RxWindowTimer2 );
+    }
 
     // This function must be called even if we are not in class b mode yet.
     if( LoRaMacClassBRxBeacon( payload, size ) == true )
@@ -1225,7 +1229,11 @@ static void ProcessRadioRxDone( void )
             OnRetransmitTimeoutTimerEvent( NULL );
         }
     }
-    MacCtx.MacFlags.Bits.MacDone = 1;
+
+    if( MacCtx.McpsIndication.RxSlot != RX_SLOT_WIN_CLASS_C )
+    {
+        MacCtx.MacFlags.Bits.MacDone = 1;
+    }
 
     UpdateRxSlotIdleState( );
 }