Added ahal
This is a formatted copy of WPILib's default user-visible C++ API, with
a bit of completely unnecessary functionality stripped out. Most of the
stripping so far is only related to weird threading decisions.
Change-Id: Icbfd949b48cd115561862cb909bcc572aba0e753
diff --git a/frc971/wpilib/ahal/PWM.h b/frc971/wpilib/ahal/PWM.h
new file mode 100644
index 0000000..9af8d0f
--- /dev/null
+++ b/frc971/wpilib/ahal/PWM.h
@@ -0,0 +1,69 @@
+/*----------------------------------------------------------------------------*/
+/* 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 <memory>
+#include <string>
+
+#include "HAL/Types.h"
+#include "frc971/wpilib/ahal/SensorBase.h"
+
+namespace frc {
+
+/**
+ * Class implements the PWM generation in the FPGA.
+ *
+ * The values supplied as arguments for PWM outputs range from -1.0 to 1.0. They
+ * are mapped to the hardware dependent values, in this case 0-2000 for the
+ * FPGA. Changes are immediately sent to the FPGA, and the update occurs at the
+ * next FPGA cycle. There is no delay.
+ *
+ * As of revision 0.1.10 of the FPGA, the FPGA interprets the 0-2000 values as
+ * follows:
+ * - 2000 = maximum pulse width
+ * - 1999 to 1001 = linear scaling from "full forward" to "center"
+ * - 1000 = center value
+ * - 999 to 2 = linear scaling from "center" to "full reverse"
+ * - 1 = minimum pulse width (currently .5ms)
+ * - 0 = disabled (i.e. PWM output is held low)
+ */
+class PWM {
+ public:
+ enum PeriodMultiplier {
+ kPeriodMultiplier_1X = 1,
+ kPeriodMultiplier_2X = 2,
+ kPeriodMultiplier_4X = 4
+ };
+
+ explicit PWM(int channel);
+ virtual ~PWM();
+ virtual void SetRaw(uint16_t value);
+ virtual uint16_t GetRaw() const;
+ virtual void SetPosition(double pos);
+ virtual double GetPosition() const;
+ virtual void SetSpeed(double speed);
+ virtual double GetSpeed() const;
+ virtual void SetDisabled();
+ void SetPeriodMultiplier(PeriodMultiplier mult);
+ void SetZeroLatch();
+ void EnableDeadbandElimination(bool eliminateDeadband);
+ void SetBounds(double max, double deadbandMax, double center,
+ double deadbandMin, double min);
+ void SetRawBounds(int max, int deadbandMax, int center, int deadbandMin,
+ int min);
+ void GetRawBounds(int32_t *max, int32_t *deadbandMax, int32_t *center,
+ int32_t *deadbandMin, int32_t *min);
+ int GetChannel() const { return m_channel; }
+
+ protected:
+ private:
+ int m_channel;
+ HAL_DigitalHandle m_handle;
+};
+
+} // namespace frc