y2016/wpilib_interface.cc

#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include <array>
#include <chrono>
#include <functional>
#include <mutex>
#include <thread>

#include "frc971/wpilib/ahal/AnalogInput.h"
#include "frc971/wpilib/ahal/Compressor.h"
#include "frc971/wpilib/ahal/DigitalGlitchFilter.h"
#include "frc971/wpilib/ahal/DriverStation.h"
#include "frc971/wpilib/ahal/Encoder.h"
#include "frc971/wpilib/ahal/Relay.h"
#include "frc971/wpilib/ahal/Talon.h"
#include "frc971/wpilib/wpilib_robot_base.h"
#undef ERROR

#include "aos/commonmath.h"
#include "aos/events/shm-event-loop.h"
#include "aos/init.h"
#include "aos/logging/logging.h"
#include "aos/logging/queue_logging.h"
#include "aos/make_unique.h"
#include "aos/robot_state/robot_state.q.h"
#include "aos/stl_mutex/stl_mutex.h"
#include "aos/time/time.h"
#include "aos/util/log_interval.h"
#include "aos/util/phased_loop.h"
#include "aos/util/wrapping_counter.h"
#include "frc971/autonomous/auto.q.h"
#include "frc971/control_loops/control_loops.q.h"
#include "frc971/control_loops/drivetrain/drivetrain.q.h"
#include "frc971/wpilib/ADIS16448.h"
#include "frc971/wpilib/buffered_pcm.h"
#include "frc971/wpilib/buffered_solenoid.h"
#include "frc971/wpilib/dma.h"
#include "frc971/wpilib/dma_edge_counting.h"
#include "frc971/wpilib/drivetrain_writer.h"
#include "frc971/wpilib/encoder_and_potentiometer.h"
#include "frc971/wpilib/gyro_sender.h"
#include "frc971/wpilib/interrupt_edge_counting.h"
#include "frc971/wpilib/joystick_sender.h"
#include "frc971/wpilib/logging.q.h"
#include "frc971/wpilib/loop_output_handler.h"
#include "frc971/wpilib/pdp_fetcher.h"
#include "frc971/wpilib/sensor_reader.h"
#include "y2016/constants.h"
#include "y2016/control_loops/drivetrain/drivetrain_dog_motor_plant.h"
#include "y2016/control_loops/shooter/shooter.q.h"
#include "y2016/control_loops/shooter/shooter.q.h"
#include "y2016/control_loops/superstructure/superstructure.q.h"
#include "y2016/queues/ball_detector.q.h"

using ::frc971::control_loops::drivetrain_queue;
using ::y2016::control_loops::shooter::shooter_queue;
using ::y2016::control_loops::superstructure_queue;
using namespace frc;
using aos::make_unique;

namespace y2016 {
namespace wpilib {
namespace {
constexpr double kMaxBringupPower = 12.0;
}  // namespace

// TODO(Brian): Fix the interpretation of the result of GetRaw here and in the
// DMA stuff and then removing the * 2.0 in *_translate.
// The low bit is direction.

// Translates for the sensor values to convert raw index pulses into something
// with proper units.

// TODO(comran): Template these methods since there is a lot of repetition here.
double hall_translate(double in) {
  // Turn voltage from our 3-state halls into a ratio that the loop can use.
  return in / 5.0;
}

double drivetrain_translate(int32_t in) {
  return -static_cast<double>(in) / (256.0 /*cpr*/ * 4.0 /*4x*/) *
         constants::Values::kDrivetrainEncoderRatio *
         control_loops::drivetrain::kWheelRadius * 2.0 * M_PI;
}

double drivetrain_velocity_translate(double in) {
  return (1.0 / in) / 256.0 /*cpr*/ *
         constants::Values::kDrivetrainEncoderRatio *
         control_loops::drivetrain::kWheelRadius * 2.0 * M_PI;
}

double shooter_translate(int32_t in) {
  return -static_cast<double>(in) / (128.0 /*cpr*/ * 4.0 /*4x*/) *
         constants::Values::kShooterEncoderRatio * (2 * M_PI /*radians*/);
}

double intake_translate(int32_t in) {
  return static_cast<double>(in) / (512.0 /*cpr*/ * 4.0 /*4x*/) *
         constants::Values::kIntakeEncoderRatio * (2 * M_PI /*radians*/);
}

double shoulder_translate(int32_t in) {
  return -static_cast<double>(in) / (512.0 /*cpr*/ * 4.0 /*4x*/) *
         constants::Values::kShoulderEncoderRatio * (2 * M_PI /*radians*/);
}

double wrist_translate(int32_t in) {
  return -static_cast<double>(in) / (512.0 /*cpr*/ * 4.0 /*4x*/) *
         constants::Values::kWristEncoderRatio * (2 * M_PI /*radians*/);
}

double intake_pot_translate(double voltage) {
  return voltage * constants::Values::kIntakePotRatio *
         (10.0 /*turns*/ / 5.0 /*volts*/) * (2 * M_PI /*radians*/);
}

double shoulder_pot_translate(double voltage) {
  return voltage * constants::Values::kShoulderPotRatio *
         (3.0 /*turns*/ / 5.0 /*volts*/) * (2 * M_PI /*radians*/);
}

double wrist_pot_translate(double voltage) {
  return voltage * constants::Values::kWristPotRatio *
         (3.0 /*turns*/ / 5.0 /*volts*/) * (2 * M_PI /*radians*/);
}

constexpr double kMaxDrivetrainEncoderPulsesPerSecond =
    5600.0 /* CIM free speed RPM */ * 14.0 / 48.0 /* 1st reduction */ * 28.0 /
    50.0 /* 2nd reduction (high gear) */ * 30.0 / 44.0 /* encoder gears */ /
    60.0 /* seconds per minute */ * 256.0 /* CPR */ * 4 /* edges per cycle */;

constexpr double kMaxShooterEncoderPulsesPerSecond =
    18700.0 /* 775pro free speed RPM */ * 12.0 /
    18.0 /* motor to encoder reduction */ / 60.0 /* seconds per minute */ *
    128.0 /* CPR */ * 4 /* edges per cycle */;

double kMaxDrivetrainShooterEncoderPulsesPerSecond = ::std::max(
    kMaxDrivetrainEncoderPulsesPerSecond, kMaxShooterEncoderPulsesPerSecond);

constexpr double kMaxSuperstructureEncoderPulsesPerSecond =
    18700.0 /* 775pro free speed RPM */ * 12.0 /
    56.0 /* motor to encoder reduction */ / 60.0 /* seconds per minute */ *
    512.0 /* CPR */ * 4 /* index pulse every quarter cycle */;

// Class to send position messages with sensor readings to our loops.
class SensorReader : public ::frc971::wpilib::SensorReader {
 public:
  SensorReader(::aos::EventLoop *event_loop)
      : ::frc971::wpilib::SensorReader(event_loop),
        ball_detector_sender_(
            event_loop->MakeSender<::y2016::sensors::BallDetector>(
                ".y2016.sensors.ball_detector")),
        auto_mode_sender_(
            event_loop->MakeSender<::frc971::autonomous::AutonomousMode>(
                ".frc971.autonomous.auto_mode")) {
    // Set it to filter out anything shorter than 1/4 of the minimum pulse width
    // we should ever see.
    UpdateFastEncoderFilterHz(kMaxDrivetrainShooterEncoderPulsesPerSecond);
    UpdateMediumEncoderFilterHz(kMaxSuperstructureEncoderPulsesPerSecond);
    hall_filter_.SetPeriodNanoSeconds(100000);
  }

  void set_drivetrain_left_hall(::std::unique_ptr<AnalogInput> analog) {
    drivetrain_left_hall_ = ::std::move(analog);
  }

  void set_drivetrain_right_hall(::std::unique_ptr<AnalogInput> analog) {
    drivetrain_right_hall_ = ::std::move(analog);
  }

  // Shooter setters.
  void set_shooter_left_encoder(::std::unique_ptr<Encoder> encoder) {
    fast_encoder_filter_.Add(encoder.get());
    shooter_left_encoder_ = ::std::move(encoder);
  }

  void set_shooter_right_encoder(::std::unique_ptr<Encoder> encoder) {
    fast_encoder_filter_.Add(encoder.get());
    shooter_right_encoder_ = ::std::move(encoder);
  }

  // Intake setters.
  void set_intake_encoder(::std::unique_ptr<Encoder> encoder) {
    medium_encoder_filter_.Add(encoder.get());
    intake_encoder_.set_encoder(::std::move(encoder));
  }

  void set_intake_potentiometer(::std::unique_ptr<AnalogInput> potentiometer) {
    intake_encoder_.set_potentiometer(::std::move(potentiometer));
  }

  void set_intake_index(::std::unique_ptr<DigitalInput> index) {
    medium_encoder_filter_.Add(index.get());
    intake_encoder_.set_index(::std::move(index));
  }

  // Shoulder setters.
  void set_shoulder_encoder(::std::unique_ptr<Encoder> encoder) {
    medium_encoder_filter_.Add(encoder.get());
    shoulder_encoder_.set_encoder(::std::move(encoder));
  }

  void set_shoulder_potentiometer(
      ::std::unique_ptr<AnalogInput> potentiometer) {
    shoulder_encoder_.set_potentiometer(::std::move(potentiometer));
  }

  void set_shoulder_index(::std::unique_ptr<DigitalInput> index) {
    medium_encoder_filter_.Add(index.get());
    shoulder_encoder_.set_index(::std::move(index));
  }

  // Wrist setters.
  void set_wrist_encoder(::std::unique_ptr<Encoder> encoder) {
    medium_encoder_filter_.Add(encoder.get());
    wrist_encoder_.set_encoder(::std::move(encoder));
  }

  void set_wrist_potentiometer(::std::unique_ptr<AnalogInput> potentiometer) {
    wrist_encoder_.set_potentiometer(::std::move(potentiometer));
  }

  void set_wrist_index(::std::unique_ptr<DigitalInput> index) {
    medium_encoder_filter_.Add(index.get());
    wrist_encoder_.set_index(::std::move(index));
  }

  // Ball detector setter.
  void set_ball_detector(::std::unique_ptr<AnalogInput> analog) {
    ball_detector_ = ::std::move(analog);
  }

  // Autonomous mode switch setter.
  void set_autonomous_mode(int i, ::std::unique_ptr<DigitalInput> sensor) {
    autonomous_modes_.at(i) = ::std::move(sensor);
  }

  // All of the DMA-related set_* calls must be made before this, and it doesn't
  // hurt to do all of them.

  void Start() {
    AddToDMA(&intake_encoder_);
    AddToDMA(&shoulder_encoder_);
    AddToDMA(&wrist_encoder_);
  }

  void RunIteration() {
    {
      auto drivetrain_message = drivetrain_queue.position.MakeMessage();
      drivetrain_message->right_encoder =
          drivetrain_translate(-drivetrain_right_encoder_->GetRaw());
      drivetrain_message->left_encoder =
          -drivetrain_translate(drivetrain_left_encoder_->GetRaw());
      drivetrain_message->left_speed =
          drivetrain_velocity_translate(drivetrain_left_encoder_->GetPeriod());
      drivetrain_message->right_speed =
          drivetrain_velocity_translate(drivetrain_right_encoder_->GetPeriod());

      drivetrain_message->left_shifter_position =
          hall_translate(drivetrain_left_hall_->GetVoltage());
      drivetrain_message->right_shifter_position =
          hall_translate(drivetrain_right_hall_->GetVoltage());

      drivetrain_message.Send();
    }
  }

  void RunDmaIteration() {
    const auto &values = constants::GetValues();
    {
      auto shooter_message = shooter_queue.position.MakeMessage();
      shooter_message->theta_left =
          shooter_translate(-shooter_left_encoder_->GetRaw());
      shooter_message->theta_right =
          shooter_translate(shooter_right_encoder_->GetRaw());
      shooter_message.Send();
    }

    {
      auto superstructure_message = superstructure_queue.position.MakeMessage();
      CopyPosition(intake_encoder_, &superstructure_message->intake,
                   intake_translate, intake_pot_translate, false,
                   values.intake.pot_offset);
      CopyPosition(shoulder_encoder_, &superstructure_message->shoulder,
                   shoulder_translate, shoulder_pot_translate, false,
                   values.shoulder.pot_offset);
      CopyPosition(wrist_encoder_, &superstructure_message->wrist,
                   wrist_translate, wrist_pot_translate, true,
                   values.wrist.pot_offset);

      superstructure_message.Send();
    }

    {
      auto ball_detector_message = ball_detector_sender_.MakeMessage();
      ball_detector_message->voltage = ball_detector_->GetVoltage();
      LOG_STRUCT(DEBUG, "ball detector", *ball_detector_message);
      ball_detector_message.Send();
    }

    {
      auto auto_mode_message = auto_mode_sender_.MakeMessage();
      auto_mode_message->mode = 0;
      for (size_t i = 0; i < autonomous_modes_.size(); ++i) {
        if (autonomous_modes_[i]->Get()) {
          auto_mode_message->mode |= 1 << i;
        }
      }
      LOG_STRUCT(DEBUG, "auto mode", *auto_mode_message);
      auto_mode_message.Send();
    }
  }

 private:
  ::aos::Sender<::y2016::sensors::BallDetector> ball_detector_sender_;
  ::aos::Sender<::frc971::autonomous::AutonomousMode> auto_mode_sender_;

  ::std::unique_ptr<AnalogInput> drivetrain_left_hall_, drivetrain_right_hall_;

  ::std::unique_ptr<Encoder> shooter_left_encoder_, shooter_right_encoder_;
  ::frc971::wpilib::DMAEncoderAndPotentiometer intake_encoder_,
      shoulder_encoder_, wrist_encoder_;
  ::std::unique_ptr<AnalogInput> ball_detector_;

  ::std::array<::std::unique_ptr<DigitalInput>, 4> autonomous_modes_;

  DigitalGlitchFilter hall_filter_;
};

class SolenoidWriter {
 public:
  SolenoidWriter(const ::std::unique_ptr<::frc971::wpilib::BufferedPcm> &pcm)
      : pcm_(pcm),
        drivetrain_(".frc971.control_loops.drivetrain_queue.output"),
        shooter_(".y2016.control_loops.shooter.shooter_queue.output"),
        superstructure_(".y2016.control_loops.superstructure_queue.output") {}

  void set_compressor(::std::unique_ptr<Compressor> compressor) {
    compressor_ = ::std::move(compressor);
  }

  void set_drivetrain_shifter(
      ::std::unique_ptr<::frc971::wpilib::BufferedSolenoid> s) {
    drivetrain_shifter_ = ::std::move(s);
  }

  void set_climber_trigger(
      ::std::unique_ptr<::frc971::wpilib::BufferedSolenoid> s) {
    climber_trigger_ = ::std::move(s);
  }

  void set_traverse(::std::unique_ptr<::frc971::wpilib::BufferedSolenoid> s) {
    traverse_ = ::std::move(s);
  }

  void set_traverse_latch(
      ::std::unique_ptr<::frc971::wpilib::BufferedSolenoid> s) {
    traverse_latch_ = ::std::move(s);
  }

  void set_shooter_clamp(
      ::std::unique_ptr<::frc971::wpilib::BufferedSolenoid> s) {
    shooter_clamp_ = ::std::move(s);
  }

  void set_shooter_pusher(
      ::std::unique_ptr<::frc971::wpilib::BufferedSolenoid> s) {
    shooter_pusher_ = ::std::move(s);
  }

  void set_lights(::std::unique_ptr<::frc971::wpilib::BufferedSolenoid> s) {
    lights_ = ::std::move(s);
  }

  void set_flashlight(::std::unique_ptr<Relay> relay) {
    flashlight_ = ::std::move(relay);
  }

  void operator()() {
    compressor_->Start();
    ::aos::SetCurrentThreadName("Solenoids");
    ::aos::SetCurrentThreadRealtimePriority(27);

    ::aos::time::PhasedLoop phased_loop(::std::chrono::milliseconds(20),
                                        ::aos::monotonic_clock::now(),
                                        ::std::chrono::milliseconds(1));

    while (run_) {
      {
        const int iterations = phased_loop.SleepUntilNext();
        if (iterations != 1) {
          LOG(DEBUG, "Solenoids skipped %d iterations\n", iterations - 1);
        }
      }

      {
        drivetrain_.FetchLatest();
        if (drivetrain_.get()) {
          LOG_STRUCT(DEBUG, "solenoids", *drivetrain_);
          drivetrain_shifter_->Set(
              !(drivetrain_->left_high || drivetrain_->right_high));
        }
      }

      {
        shooter_.FetchLatest();
        if (shooter_.get()) {
          LOG_STRUCT(DEBUG, "solenoids", *shooter_);
          shooter_clamp_->Set(shooter_->clamp_open);
          shooter_pusher_->Set(shooter_->push_to_shooter);
          lights_->Set(shooter_->lights_on);
          if (shooter_->forwards_flashlight) {
            if (shooter_->backwards_flashlight) {
              flashlight_->Set(Relay::kOn);
            } else {
              flashlight_->Set(Relay::kReverse);
            }
          } else {
            if (shooter_->backwards_flashlight) {
              flashlight_->Set(Relay::kForward);
            } else {
              flashlight_->Set(Relay::kOff);
            }
          }
        }
      }

      {
        superstructure_.FetchLatest();
        if (superstructure_.get()) {
          LOG_STRUCT(DEBUG, "solenoids", *superstructure_);

          climber_trigger_->Set(superstructure_->unfold_climber);

          traverse_->Set(superstructure_->traverse_down);
          traverse_latch_->Set(superstructure_->traverse_unlatched);
        }
      }

      {
        ::frc971::wpilib::PneumaticsToLog to_log;
        { to_log.compressor_on = compressor_->Enabled(); }

        pcm_->Flush();
        to_log.read_solenoids = pcm_->GetAll();
        LOG_STRUCT(DEBUG, "pneumatics info", to_log);
      }
    }
  }

  void Quit() { run_ = false; }

 private:
  const ::std::unique_ptr<::frc971::wpilib::BufferedPcm> &pcm_;

  ::std::unique_ptr<::frc971::wpilib::BufferedSolenoid> drivetrain_shifter_,
      shooter_clamp_, shooter_pusher_, lights_, traverse_, traverse_latch_,
      climber_trigger_;
  ::std::unique_ptr<Relay> flashlight_;
  ::std::unique_ptr<Compressor> compressor_;

  ::aos::Queue<::frc971::control_loops::DrivetrainQueue::Output> drivetrain_;
  ::aos::Queue<::y2016::control_loops::shooter::ShooterQueue::Output> shooter_;
  ::aos::Queue<::y2016::control_loops::SuperstructureQueue::Output>
      superstructure_;

  ::std::atomic<bool> run_{true};
};

class ShooterWriter : public ::frc971::wpilib::LoopOutputHandler {
 public:
  ShooterWriter(::aos::EventLoop *event_loop)
      : ::frc971::wpilib::LoopOutputHandler(event_loop) {}

  void set_shooter_left_talon(::std::unique_ptr<Talon> t) {
    shooter_left_talon_ = ::std::move(t);
  }

  void set_shooter_right_talon(::std::unique_ptr<Talon> t) {
    shooter_right_talon_ = ::std::move(t);
  }

 private:
  virtual void Read() override {
    ::y2016::control_loops::shooter::shooter_queue.output.FetchAnother();
  }

  virtual void Write() override {
    auto &queue = ::y2016::control_loops::shooter::shooter_queue.output;
    LOG_STRUCT(DEBUG, "will output", *queue);

    shooter_left_talon_->SetSpeed(queue->voltage_left / 12.0);
    shooter_right_talon_->SetSpeed(-queue->voltage_right / 12.0);
  }

  virtual void Stop() override {
    LOG(WARNING, "Shooter output too old.\n");
    shooter_left_talon_->SetDisabled();
    shooter_right_talon_->SetDisabled();
  }

  ::std::unique_ptr<Talon> shooter_left_talon_, shooter_right_talon_;
};

class SuperstructureWriter : public ::frc971::wpilib::LoopOutputHandler {
 public:
  SuperstructureWriter(::aos::EventLoop *event_loop)
      : ::frc971::wpilib::LoopOutputHandler(event_loop) {}

  void set_intake_talon(::std::unique_ptr<Talon> t) {
    intake_talon_ = ::std::move(t);
  }

  void set_shoulder_talon(::std::unique_ptr<Talon> t) {
    shoulder_talon_ = ::std::move(t);
  }

  void set_wrist_talon(::std::unique_ptr<Talon> t) {
    wrist_talon_ = ::std::move(t);
  }

  void set_top_rollers_talon(::std::unique_ptr<Talon> t) {
    top_rollers_talon_ = ::std::move(t);
  }

  void set_bottom_rollers_talon(::std::unique_ptr<Talon> t) {
    bottom_rollers_talon_ = ::std::move(t);
  }

  void set_climber_talon(::std::unique_ptr<Talon> t) {
    climber_talon_ = ::std::move(t);
  }

 private:
  virtual void Read() override {
    ::y2016::control_loops::superstructure_queue.output.FetchAnother();
  }

  virtual void Write() override {
    auto &queue = ::y2016::control_loops::superstructure_queue.output;
    LOG_STRUCT(DEBUG, "will output", *queue);
    intake_talon_->SetSpeed(::aos::Clip(queue->voltage_intake,
                                        -kMaxBringupPower, kMaxBringupPower) /
                            12.0);
    shoulder_talon_->SetSpeed(::aos::Clip(-queue->voltage_shoulder,
                                          -kMaxBringupPower, kMaxBringupPower) /
                              12.0);
    wrist_talon_->SetSpeed(
        ::aos::Clip(queue->voltage_wrist, -kMaxBringupPower, kMaxBringupPower) /
        12.0);
    top_rollers_talon_->SetSpeed(-queue->voltage_top_rollers / 12.0);
    bottom_rollers_talon_->SetSpeed(-queue->voltage_bottom_rollers / 12.0);
    climber_talon_->SetSpeed(-queue->voltage_climber / 12.0);
  }

  virtual void Stop() override {
    LOG(WARNING, "Superstructure output too old.\n");
    intake_talon_->SetDisabled();
    shoulder_talon_->SetDisabled();
    wrist_talon_->SetDisabled();
  }

  ::std::unique_ptr<Talon> intake_talon_, shoulder_talon_, wrist_talon_,
      top_rollers_talon_, bottom_rollers_talon_, climber_talon_;
};

class WPILibRobot : public ::frc971::wpilib::WPILibRobotBase {
 public:
  ::std::unique_ptr<Encoder> make_encoder(int index) {
    return make_unique<Encoder>(10 + index * 2, 11 + index * 2, false,
                                Encoder::k4X);
  }

  void Run() override {
    ::aos::InitNRT();
    ::aos::SetCurrentThreadName("StartCompetition");

    ::aos::ShmEventLoop event_loop;

    ::frc971::wpilib::JoystickSender joystick_sender(&event_loop);
    ::std::thread joystick_thread(::std::ref(joystick_sender));

    ::frc971::wpilib::PDPFetcher pdp_fetcher(&event_loop);
    ::std::thread pdp_fetcher_thread(::std::ref(pdp_fetcher));
    SensorReader reader(&event_loop);

    reader.set_drivetrain_left_encoder(make_encoder(5));
    reader.set_drivetrain_right_encoder(make_encoder(6));
    reader.set_drivetrain_left_hall(make_unique<AnalogInput>(5));
    reader.set_drivetrain_right_hall(make_unique<AnalogInput>(6));

    reader.set_shooter_left_encoder(make_encoder(7));
    reader.set_shooter_right_encoder(make_encoder(-3));

    reader.set_intake_encoder(make_encoder(0));
    reader.set_intake_index(make_unique<DigitalInput>(0));
    reader.set_intake_potentiometer(make_unique<AnalogInput>(0));

    reader.set_shoulder_encoder(make_encoder(4));
    reader.set_shoulder_index(make_unique<DigitalInput>(2));
    reader.set_shoulder_potentiometer(make_unique<AnalogInput>(2));

    reader.set_wrist_encoder(make_encoder(1));
    reader.set_wrist_index(make_unique<DigitalInput>(1));
    reader.set_wrist_potentiometer(make_unique<AnalogInput>(1));

    reader.set_ball_detector(make_unique<AnalogInput>(7));

    reader.set_autonomous_mode(0, make_unique<DigitalInput>(9));
    reader.set_autonomous_mode(1, make_unique<DigitalInput>(8));
    reader.set_autonomous_mode(2, make_unique<DigitalInput>(7));
    reader.set_autonomous_mode(3, make_unique<DigitalInput>(6));

    ::std::thread reader_thread(::std::ref(reader));

    // TODO(Brian): This interacts poorly with the SpiRxClearer in ADIS16448.
    ::frc971::wpilib::GyroSender gyro_sender(&event_loop);
    ::std::thread gyro_thread(::std::ref(gyro_sender));

    auto imu_trigger = make_unique<DigitalInput>(3);
    ::frc971::wpilib::ADIS16448 imu(&event_loop, SPI::Port::kMXP,
                                    imu_trigger.get());
    ::std::thread imu_thread(::std::ref(imu));

    ::frc971::wpilib::DrivetrainWriter drivetrain_writer(&event_loop);
    drivetrain_writer.set_left_controller0(
        ::std::unique_ptr<Talon>(new Talon(5)), false);
    drivetrain_writer.set_right_controller0(
        ::std::unique_ptr<Talon>(new Talon(4)), true);
    ::std::thread drivetrain_writer_thread(::std::ref(drivetrain_writer));

    ShooterWriter shooter_writer(&event_loop);
    shooter_writer.set_shooter_left_talon(
        ::std::unique_ptr<Talon>(new Talon(9)));
    shooter_writer.set_shooter_right_talon(
        ::std::unique_ptr<Talon>(new Talon(8)));
    ::std::thread shooter_writer_thread(::std::ref(shooter_writer));

    SuperstructureWriter superstructure_writer(&event_loop);
    superstructure_writer.set_intake_talon(
        ::std::unique_ptr<Talon>(new Talon(3)));
    superstructure_writer.set_shoulder_talon(
        ::std::unique_ptr<Talon>(new Talon(6)));
    superstructure_writer.set_wrist_talon(
        ::std::unique_ptr<Talon>(new Talon(2)));
    superstructure_writer.set_top_rollers_talon(
        ::std::unique_ptr<Talon>(new Talon(1)));
    superstructure_writer.set_bottom_rollers_talon(
        ::std::unique_ptr<Talon>(new Talon(0)));
    superstructure_writer.set_climber_talon(
        ::std::unique_ptr<Talon>(new Talon(7)));
    ::std::thread superstructure_writer_thread(
        ::std::ref(superstructure_writer));

    ::std::unique_ptr<::frc971::wpilib::BufferedPcm> pcm(
        new ::frc971::wpilib::BufferedPcm());
    SolenoidWriter solenoid_writer(pcm);
    solenoid_writer.set_drivetrain_shifter(pcm->MakeSolenoid(0));
    solenoid_writer.set_traverse_latch(pcm->MakeSolenoid(2));
    solenoid_writer.set_traverse(pcm->MakeSolenoid(3));
    solenoid_writer.set_shooter_clamp(pcm->MakeSolenoid(4));
    solenoid_writer.set_shooter_pusher(pcm->MakeSolenoid(5));
    solenoid_writer.set_lights(pcm->MakeSolenoid(6));
    solenoid_writer.set_climber_trigger(pcm->MakeSolenoid(1));
    solenoid_writer.set_flashlight(make_unique<Relay>(0));

    solenoid_writer.set_compressor(make_unique<Compressor>());

    ::std::thread solenoid_thread(::std::ref(solenoid_writer));

    // Wait forever. Not much else to do...
    while (true) {
      const int r = select(0, nullptr, nullptr, nullptr, nullptr);
      if (r != 0) {
        PLOG(WARNING, "infinite select failed");
      } else {
        PLOG(WARNING, "infinite select succeeded??\n");
      }
    }

    LOG(ERROR, "Exiting WPILibRobot\n");

    joystick_sender.Quit();
    joystick_thread.join();
    pdp_fetcher.Quit();
    pdp_fetcher_thread.join();
    reader.Quit();
    reader_thread.join();
    gyro_sender.Quit();
    gyro_thread.join();
    imu.Quit();
    imu_thread.join();

    drivetrain_writer.Quit();
    drivetrain_writer_thread.join();
    shooter_writer.Quit();
    shooter_writer_thread.join();
    superstructure_writer.Quit();
    superstructure_writer_thread.join();
    solenoid_writer.Quit();
    solenoid_thread.join();

    ::aos::Cleanup();
  }
};

}  // namespace wpilib
}  // namespace y2016

AOS_ROBOT_CLASS(::y2016::wpilib::WPILibRobot);