Add 2020 speed controllers (#2188)

Add CTRE TalonFX (PWMTalonFX)
Add Playing with Fusion Venom (PWMVenom)

wpilibc/src/main/native/include/frc/PWMVenom.h

@@ -0,0 +1,43 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2019 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 "frc/PWMSpeedController.h"
+
+namespace frc {
+
+/**
+ * Playing with Fusion Venom Smart Motor with PWM control.
+ *
+ * Note that the Venom uses the following bounds for PWM values. These
+ * values should work reasonably well for most controllers, but if users
+ * experience issues such as asymmetric behavior around the deadband or
+ * inability to saturate the controller in either direction, calibration is
+ * recommended.
+ *
+ * \li 2.004ms = full "forward"
+ * \li 1.520ms = the "high end" of the deadband range
+ * \li 1.500ms = center of the deadband range (off)
+ * \li 1.480ms = the "low end" of the deadband range
+ * \li 0.997ms = full "reverse"
+ */
+class PWMVenom : public PWMSpeedController {
+ public:
+  /**
+   * Construct a Venom connected via PWM.
+   *
+   * @param channel The PWM channel that the Venom is attached to. 0-9 are
+   *                on-board, 10-19 are on the MXP port
+   */
+  explicit PWMVenom(int channel);
+
+  PWMVenom(PWMVenom&&) = default;
+  PWMVenom& operator=(PWMVenom&&) = default;
+};
+
+}  // namespace frc