Fixed an overflow bug in the cadence calculation.

msimms · May 29, 2024 · 8d52c39 · 8d52c39
1 parent 4a62c5d
commit 8d52c39
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/IOS/Sensors/SensorMgr.swift b/IOS/Sensors/SensorMgr.swift
@@ -135,11 +135,12 @@ class SensorMgr : ObservableObject {
 			self.firstCadenceUpdate = true
 		}
 
-		if currentCrankTime >= self.lastCrankCountTime { // handle wrap-around
+		// Handle wrap-around
+		if currentCrankTime >= self.lastCrankCountTime { // normal case
 			elapsedSecs = Double(currentCrankTime - self.lastCrankCountTime) / 1024.0
 		}
 		else {
-			let temp: UInt32 = 0x0000ffff + UInt32(currentCrankTime)
+			let temp: UInt32 = 0x0000ffff + (UInt32(currentCrankTime) << 16)
 			elapsedSecs = Double(temp - UInt32(self.lastCrankCountTime)) / 1024.0
 		}