WPILib Reorganization

This is a major restructuring of the WPILib repository to simply build
procedures and remove the remnants of Maven from everything except the
eclipse plugins. Gradle files have been largely simplified or rewritten,
taking advantage of splitting up parts of the build into separate build
files for ease of reading.

The eclipse plugins are now in a separate project, as is ntcore. All
dependencies are resolved via Maven dependencies, with the
Jenkins-maintained WPILib repo. Project structures have also been
simplified: we no longer have separate subprojects inside wpilibc and
wpilibj. Where possible, these changes hav been done with git renames,
to make sure we still have full history for all repositories. Other
unrelated subprojects have also been broken out: OutlineViewer is now a
separate project.

Change-Id: Ib4e2a6e1a2f66427a14f16612b0e0d69ed661878

wpilibc/Athena/src/Servo.cpp

@@ -0,0 +1,133 @@
+/*----------------------------------------------------------------------------*/
+/* 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.  */
+/*----------------------------------------------------------------------------*/
+
+#include "Servo.h"
+
+//#include "NetworkCommunication/UsageReporting.h"
+#include "LiveWindow/LiveWindow.h"
+
+constexpr float Servo::kMaxServoAngle;
+constexpr float Servo::kMinServoAngle;
+
+constexpr float Servo::kDefaultMaxServoPWM;
+constexpr float Servo::kDefaultMinServoPWM;
+
+/**
+ * @param channel The PWM channel to which the servo is attached. 0-9 are
+ * on-board, 10-19 are on the MXP port
+ */
+Servo::Servo(uint32_t channel) : SafePWM(channel) {
+  // Set minimum and maximum PWM values supported by the servo
+  SetBounds(kDefaultMaxServoPWM, 0.0, 0.0, 0.0, kDefaultMinServoPWM);
+
+  // Assign defaults for period multiplier for the servo PWM control signal
+  SetPeriodMultiplier(kPeriodMultiplier_4X);
+
+  //	printf("Done initializing servo %d\n", channel);
+}
+
+Servo::~Servo() {
+  if (m_table != nullptr) {
+    m_table->RemoveTableListener(this);
+  }
+}
+
+/**
+ * Set the servo position.
+ *
+ * Servo values range from 0.0 to 1.0 corresponding to the range of full left to
+ * full right.
+ *
+ * @param value Position from 0.0 to 1.0.
+ */
+void Servo::Set(float value) { SetPosition(value); }
+
+/**
+ * Set the servo to offline.
+ *
+ * Set the servo raw value to 0 (undriven)
+ */
+void Servo::SetOffline() { SetRaw(0); }
+
+/**
+ * Get the servo position.
+ *
+ * Servo values range from 0.0 to 1.0 corresponding to the range of full left to
+ * full right.
+ *
+ * @return Position from 0.0 to 1.0.
+ */
+float Servo::Get() const { return GetPosition(); }
+
+/**
+ * Set the servo angle.
+ *
+ * Assume that the servo angle is linear with respect to the PWM value (big
+ * assumption, need to test).
+ *
+ * Servo angles that are out of the supported range of the servo simply
+ * "saturate" in that direction
+ * In other words, if the servo has a range of (X degrees to Y degrees) than
+ * angles of less than X
+ * result in an angle of X being set and angles of more than Y degrees result in
+ * an angle of Y being set.
+ *
+ * @param degrees The angle in degrees to set the servo.
+ */
+void Servo::SetAngle(float degrees) {
+  if (degrees < kMinServoAngle) {
+    degrees = kMinServoAngle;
+  } else if (degrees > kMaxServoAngle) {
+    degrees = kMaxServoAngle;
+  }
+
+  SetPosition(((float)(degrees - kMinServoAngle)) / GetServoAngleRange());
+}
+
+/**
+ * Get the servo angle.
+ *
+ * Assume that the servo angle is linear with respect to the PWM value (big
+ * assumption, need to test).
+ * @return The angle in degrees to which the servo is set.
+ */
+float Servo::GetAngle() const {
+  return (float)GetPosition() * GetServoAngleRange() + kMinServoAngle;
+}
+
+void Servo::ValueChanged(ITable* source, llvm::StringRef key,
+                         std::shared_ptr<nt::Value> value, bool isNew) {
+  if (!value->IsDouble()) return;
+  Set(value->GetDouble());
+}
+
+void Servo::UpdateTable() {
+  if (m_table != nullptr) {
+    m_table->PutNumber("Value", Get());
+  }
+}
+
+void Servo::StartLiveWindowMode() {
+  if (m_table != nullptr) {
+    m_table->AddTableListener("Value", this, true);
+  }
+}
+
+void Servo::StopLiveWindowMode() {
+  if (m_table != nullptr) {
+    m_table->RemoveTableListener(this);
+  }
+}
+
+std::string Servo::GetSmartDashboardType() const { return "Servo"; }
+
+void Servo::InitTable(std::shared_ptr<ITable> subTable) {
+  m_table = subTable;
+  UpdateTable();
+}
+
+std::shared_ptr<ITable> Servo::GetTable() const { return m_table; }