Rename our allwpilib (which is now 2020) to not have 2019 in the name
Change-Id: I3c07f85ed32ab8b97db765a9b43f2a6ce7da964a
diff --git a/hal/src/main/native/athena/FPGAEncoder.h b/hal/src/main/native/athena/FPGAEncoder.h
new file mode 100644
index 0000000..f29aeae
--- /dev/null
+++ b/hal/src/main/native/athena/FPGAEncoder.h
@@ -0,0 +1,126 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2016-2018 FIRST. 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 <stdint.h>
+
+#include "hal/AnalogTrigger.h"
+#include "hal/Types.h"
+
+extern "C" {
+
+HAL_FPGAEncoderHandle HAL_InitializeFPGAEncoder(
+ HAL_Handle digitalSourceHandleA, HAL_AnalogTriggerType analogTriggerTypeA,
+ HAL_Handle digitalSourceHandleB, HAL_AnalogTriggerType analogTriggerTypeB,
+ HAL_Bool reverseDirection, int32_t* index, int32_t* status);
+void HAL_FreeFPGAEncoder(HAL_FPGAEncoderHandle fpgaEncoderHandle,
+ int32_t* status);
+
+/**
+ * Reset the Encoder distance to zero.
+ * Resets the current count to zero on the encoder.
+ */
+void HAL_ResetFPGAEncoder(HAL_FPGAEncoderHandle fpgaEncoderHandle,
+ int32_t* status);
+
+/**
+ * Gets the fpga value from the encoder.
+ * The fpga value is the actual count unscaled by the 1x, 2x, or 4x scale
+ * factor.
+ * @return Current fpga count from the encoder
+ */
+int32_t HAL_GetFPGAEncoder(HAL_FPGAEncoderHandle fpgaEncoderHandle,
+ int32_t* status); // Raw value
+
+/**
+ * Returns the period of the most recent pulse.
+ * Returns the period of the most recent Encoder pulse in seconds.
+ * This method compenstates for the decoding type.
+ *
+ * @deprecated Use GetRate() in favor of this method. This returns unscaled
+ * periods and GetRate() scales using value from SetDistancePerPulse().
+ *
+ * @return Period in seconds of the most recent pulse.
+ */
+double HAL_GetFPGAEncoderPeriod(HAL_FPGAEncoderHandle fpgaEncoderHandle,
+ int32_t* status);
+
+/**
+ * Sets the maximum period for stopped detection.
+ * Sets the value that represents the maximum period of the Encoder before it
+ * will assume that the attached device is stopped. This timeout allows users
+ * to determine if the wheels or other shaft has stopped rotating.
+ * This method compensates for the decoding type.
+ *
+ * @deprecated Use SetMinRate() in favor of this method. This takes unscaled
+ * periods and SetMinRate() scales using value from SetDistancePerPulse().
+ *
+ * @param maxPeriod The maximum time between rising and falling edges before the
+ * FPGA will
+ * report the device stopped. This is expressed in seconds.
+ */
+void HAL_SetFPGAEncoderMaxPeriod(HAL_FPGAEncoderHandle fpgaEncoderHandle,
+ double maxPeriod, int32_t* status);
+
+/**
+ * Determine if the encoder is stopped.
+ * Using the MaxPeriod value, a boolean is returned that is true if the encoder
+ * is considered stopped and false if it is still moving. A stopped encoder is
+ * one where the most recent pulse width exceeds the MaxPeriod.
+ * @return True if the encoder is considered stopped.
+ */
+HAL_Bool HAL_GetFPGAEncoderStopped(HAL_FPGAEncoderHandle fpgaEncoderHandle,
+ int32_t* status);
+
+/**
+ * The last direction the encoder value changed.
+ * @return The last direction the encoder value changed.
+ */
+HAL_Bool HAL_GetFPGAEncoderDirection(HAL_FPGAEncoderHandle fpgaEncoderHandle,
+ int32_t* status);
+
+/**
+ * Set the direction sensing for this encoder.
+ * This sets the direction sensing on the encoder so that it could count in the
+ * correct software direction regardless of the mounting.
+ * @param reverseDirection true if the encoder direction should be reversed
+ */
+void HAL_SetFPGAEncoderReverseDirection(HAL_FPGAEncoderHandle fpgaEncoderHandle,
+ HAL_Bool reverseDirection,
+ int32_t* status);
+
+/**
+ * Set the Samples to Average which specifies the number of samples of the timer
+ * to average when calculating the period. Perform averaging to account for
+ * mechanical imperfections or as oversampling to increase resolution.
+ * @param samplesToAverage The number of samples to average from 1 to 127.
+ */
+void HAL_SetFPGAEncoderSamplesToAverage(HAL_FPGAEncoderHandle fpgaEncoderHandle,
+ int32_t samplesToAverage,
+ int32_t* status);
+
+/**
+ * Get the Samples to Average which specifies the number of samples of the timer
+ * to average when calculating the period. Perform averaging to account for
+ * mechanical imperfections or as oversampling to increase resolution.
+ * @return SamplesToAverage The number of samples being averaged (from 1 to 127)
+ */
+int32_t HAL_GetFPGAEncoderSamplesToAverage(
+ HAL_FPGAEncoderHandle fpgaEncoderHandle, int32_t* status);
+
+/**
+ * Set an index source for an encoder, which is an input that resets the
+ * encoder's count.
+ */
+void HAL_SetFPGAEncoderIndexSource(HAL_FPGAEncoderHandle fpgaEncoderHandle,
+ HAL_Handle digitalSourceHandle,
+ HAL_AnalogTriggerType analogTriggerType,
+ HAL_Bool activeHigh, HAL_Bool edgeSensitive,
+ int32_t* status);
+
+} // extern "C"