From ddf3e4f7d3f5162be405a2cf3818153dba700ecd Mon Sep 17 00:00:00 2001
From: David P Hilton <david.hilton.p@gmail.com>
Date: Mon, 29 Oct 2018 23:05:12 -0600
Subject: [PATCH] fix overflow in tempError

---
 workspace/TS100/src/main.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/workspace/TS100/src/main.cpp b/workspace/TS100/src/main.cpp
index eec0c87d..b587dd4e 100644
--- a/workspace/TS100/src/main.cpp
+++ b/workspace/TS100/src/main.cpp
@@ -948,7 +948,10 @@ void startPIDTask(void const *argument __unused) {
 				//  to be unstable. Use a rolling average to dampen it.
 				// We overshoot by roughly 1/2 of 1 degree Fahrenheit.
 				//  This helps stabilize the display.
-				tempError.update(currentlyActiveTemperatureTarget - rawTemp + rawC/4);
+				int32_t tError = currentlyActiveTemperatureTarget - rawTemp + rawC/4;
+				tError = tError > INT16_MAX ? INT16_MAX : tError;
+				tError = tError < INT16_MIN ? INT16_MIN : tError;
+				tempError.update(tError);
 
 				// Now for the PID!
 				int32_t milliWattsOut = 0;