From 50a8508b80b0788257bf509f1ca14661dead7716 Mon Sep 17 00:00:00 2001
From: rusefillc <sdfsdfqsf2334234234>
Date: Sun, 19 Jun 2022 11:29:17 -0400
Subject: [PATCH] Mark reports that detectHellenBoardType hangs up HD and
 Nucleo fix #4084

---
 firmware/config/boards/hellen/hellen_board_id.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/firmware/config/boards/hellen/hellen_board_id.cpp b/firmware/config/boards/hellen/hellen_board_id.cpp
index 6e755a08fc..e9b40315b9 100644
--- a/firmware/config/boards/hellen/hellen_board_id.cpp
+++ b/firmware/config/boards/hellen/hellen_board_id.cpp
@@ -97,7 +97,12 @@ float HellenBoardIdSolver::solve(float Tc1, float Tc2, float x0, float y, float
 	float Xcur, Xnext;
 	Xnext = x0;
 
+    int safetyLimit = 5000; // since we had https://github.com/rusefi/rusefi/issues/4084 let's add paranoia check
 	do {
+	    if (safetyLimit-- < 0) {
+	        firmwareError(OBD_PCM_Processor_Fault, "hellen boardID is broken");
+	        return Xnext;
+	    }
 		Xcur = Xnext;
 		Xnext = Xcur - fx(Xcur) / dfx(Xcur);