Added y2016_bot4 (2+2, just drive base)

Change-Id: Ideca53bfc7cb4cf701dc7cf068d86dfb2bc16ae5
diff --git a/y2016_bot4/joystick_reader.cc b/y2016_bot4/joystick_reader.cc
new file mode 100644
index 0000000..e7252f3
--- /dev/null
+++ b/y2016_bot4/joystick_reader.cc
@@ -0,0 +1,112 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <math.h>
+
+#include "aos/linux_code/init.h"
+#include "aos/input/joystick_input.h"
+#include "aos/common/input/driver_station_data.h"
+#include "aos/common/logging/logging.h"
+#include "aos/common/util/log_interval.h"
+#include "aos/common/time.h"
+#include "aos/common/actions/actions.h"
+
+#include "frc971/control_loops/drivetrain/drivetrain.q.h"
+
+#include "frc971/queues/gyro.q.h"
+#include "y2016_bot4/control_loops/drivetrain/drivetrain_base.h"
+
+using ::frc971::control_loops::drivetrain_queue;
+
+using ::aos::input::driver_station::ButtonLocation;
+using ::aos::input::driver_station::ControlBit;
+using ::aos::input::driver_station::JoystickAxis;
+using ::aos::input::driver_station::POVLocation;
+
+namespace y2016_bot4 {
+namespace input {
+namespace joysticks {
+
+//#define XBOX
+
+#ifdef XBOX
+// Xbox
+const JoystickAxis kSteeringWheel(1, 5), kDriveThrottle(1, 2);
+const ButtonLocation kQuickTurn(1, 5);
+#else
+// Steering wheel
+const JoystickAxis kSteeringWheel(1, 1), kDriveThrottle(2, 2);
+const ButtonLocation kQuickTurn(1, 5);
+#endif
+
+const ButtonLocation kTurn1(1, 7);
+const ButtonLocation kTurn2(1, 11);
+
+class Reader : public ::aos::input::JoystickInput {
+ public:
+  Reader() {}
+
+  void RunIteration(const ::aos::input::driver_station::Data &data) override {
+    const bool auto_running = data.GetControlBit(ControlBit::kAutonomous) &&
+                              data.GetControlBit(ControlBit::kEnabled);
+
+    if (!auto_running) {
+      HandleDrivetrain(data);
+    } else {
+      drivetrain_queue.goal.MakeWithBuilder()
+          .steering(0.0)
+          .throttle(0.0)
+          .quickturn(false)
+          .control_loop_driving(false)
+          .left_goal(0.0)
+          .right_goal(0.0)
+          .left_velocity_goal(0)
+          .right_velocity_goal(0)
+          .Send();
+    }
+  }
+
+  void HandleDrivetrain(const ::aos::input::driver_station::Data &data) {
+    bool is_control_loop_driving = false;
+    const double wheel = -data.GetAxis(kSteeringWheel);
+    const double throttle = -data.GetAxis(kDriveThrottle);
+    drivetrain_queue.status.FetchLatest();
+
+    if (data.PosEdge(kTurn1) || data.PosEdge(kTurn2)) {
+      if (drivetrain_queue.status.get()) {
+        left_goal_ = drivetrain_queue.status->estimated_left_position;
+        right_goal_ = drivetrain_queue.status->estimated_right_position;
+      }
+    }
+    if (data.IsPressed(kTurn1) || data.IsPressed(kTurn2)) {
+      is_control_loop_driving = true;
+    }
+    if (!drivetrain_queue.goal.MakeWithBuilder()
+             .steering(wheel)
+             .throttle(throttle)
+             .quickturn(data.IsPressed(kQuickTurn))
+             .control_loop_driving(is_control_loop_driving)
+             .left_goal(left_goal_ - wheel * 0.5 + throttle * 0.3)
+             .right_goal(right_goal_ + wheel * 0.5 + throttle * 0.3)
+             .left_velocity_goal(0)
+             .right_velocity_goal(0)
+             .Send()) {
+      LOG(WARNING, "sending stick values failed\n");
+    }
+  }
+
+ private:
+  double left_goal_ = 0.0;
+  double right_goal_ = 0.0;
+};
+
+}  // namespace joysticks
+}  // namespace input
+}  // namespace y2016_bot4
+
+int main() {
+  ::aos::Init(-1);
+  ::y2016_bot4::input::joysticks::Reader reader;
+  reader.Run();
+  ::aos::Cleanup();
+}