diff --git a/wpilibc/athena/include/SPI.h b/wpilibc/athena/include/SPI.h
new file mode 100644
index 0000000..6a69e61
--- /dev/null
+++ b/wpilibc/athena/include/SPI.h
@@ -0,0 +1,74 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2008-2017. 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 the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#pragma once
+
+#include "SensorBase.h"
+
+namespace frc {
+
+class DigitalOutput;
+class DigitalInput;
+
+/**
+ * SPI bus interface class.
+ *
+ * This class is intended to be used by sensor (and other SPI device) drivers.
+ * It probably should not be used directly.
+ *
+ */
+class SPI : public SensorBase {
+ public:
+  enum Port { kOnboardCS0, kOnboardCS1, kOnboardCS2, kOnboardCS3, kMXP };
+  explicit SPI(Port SPIport);
+  virtual ~SPI();
+
+  SPI(const SPI&) = delete;
+  SPI& operator=(const SPI&) = delete;
+
+  void SetClockRate(double hz);
+
+  void SetMSBFirst();
+  void SetLSBFirst();
+
+  void SetSampleDataOnFalling();
+  void SetSampleDataOnRising();
+
+  void SetClockActiveLow();
+  void SetClockActiveHigh();
+
+  void SetChipSelectActiveHigh();
+  void SetChipSelectActiveLow();
+
+  virtual int Write(uint8_t* data, int size);
+  virtual int Read(bool initiate, uint8_t* dataReceived, int size);
+  virtual int Transaction(uint8_t* dataToSend, uint8_t* dataReceived, int size);
+
+  void InitAccumulator(double period, int cmd, int xfer_size, int valid_mask,
+                       int valid_value, int data_shift, int data_size,
+                       bool is_signed, bool big_endian);
+  void FreeAccumulator();
+  void ResetAccumulator();
+  void SetAccumulatorCenter(int center);
+  void SetAccumulatorDeadband(int deadband);
+  int GetAccumulatorLastValue() const;
+  int64_t GetAccumulatorValue() const;
+  int64_t GetAccumulatorCount() const;
+  double GetAccumulatorAverage() const;
+  void GetAccumulatorOutput(int64_t& value, int64_t& count) const;
+
+ protected:
+  int m_port;
+  bool m_msbFirst = false;          // default little-endian
+  bool m_sampleOnTrailing = false;  // default data updated on falling edge
+  bool m_clk_idle_high = false;     // default clock active high
+
+ private:
+  void Init();
+};
+
+}  // namespace frc