Squashed 'third_party/allwpilib_2016/' content from commit 7f61816
Change-Id: If9d9245880859cdf580f5d7f77045135d0521ce7
git-subtree-dir: third_party/allwpilib_2016
git-subtree-split: 7f618166ed253a24629934fcf89c3decb0528a3b
diff --git a/wpilibc/Athena/include/CounterBase.h b/wpilibc/Athena/include/CounterBase.h
new file mode 100644
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+++ b/wpilibc/Athena/include/CounterBase.h
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+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2008. All Rights Reserved.
+ */
+/* Open Source Software - may be modified and shared by FRC teams. The code */
+/* must be accompanied by the FIRST BSD license file in $(WIND_BASE)/WPILib. */
+/*----------------------------------------------------------------------------*/
+#pragma once
+
+#include <stdint.h>
+
+/**
+ * Interface for counting the number of ticks on a digital input channel.
+ * Encoders, Gear tooth sensors, and counters should all subclass this so it can
+ * be used to build more advanced classes for control and driving.
+ *
+ * All counters will immediately start counting - Reset() them if you need them
+ * to be zeroed before use.
+ */
+class CounterBase {
+ public:
+ enum EncodingType { k1X, k2X, k4X };
+
+ virtual ~CounterBase() = default;
+ virtual int32_t Get() const = 0;
+ virtual void Reset() = 0;
+ virtual double GetPeriod() const = 0;
+ virtual void SetMaxPeriod(double maxPeriod) = 0;
+ virtual bool GetStopped() const = 0;
+ virtual bool GetDirection() const = 0;
+};