From 07fb33a0834cd6f719aacb7768214b7289738305 Mon Sep 17 00:00:00 2001
From: Bernhard Kirchen <schlimmchen@posteo.net>
Date: Fri, 29 Mar 2024 21:20:03 +0100
Subject: [PATCH] VE.Direct: make state machine timeout robust against overflow

---
 lib/VeDirectFrameHandler/VeDirectFrameHandler.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/VeDirectFrameHandler/VeDirectFrameHandler.cpp b/lib/VeDirectFrameHandler/VeDirectFrameHandler.cpp
index 14dfa129b..af45919fb 100644
--- a/lib/VeDirectFrameHandler/VeDirectFrameHandler.cpp
+++ b/lib/VeDirectFrameHandler/VeDirectFrameHandler.cpp
@@ -110,7 +110,7 @@ void VeDirectFrameHandler<T>::loop()
 	// there will never be a large gap between two bytes of the same frame.
 	// if such a large gap is observed, reset the state machine so it tries
 	// to decode a new frame once more data arrives.
-	if (IDLE != _state && _lastByteMillis + 500 < millis()) {
+	if (IDLE != _state && (millis() - _lastByteMillis) > 500) {
 		_msgOut->printf("%s Resetting state machine (was %d) after timeout\r\n", _logId, _state);
 		if (_verboseLogging) { dumpDebugBuffer(); }
 		_checksum = 0;