Import y2014 directory for the 2016 season.

Change-Id: Id12c60fa17d40edb23d3a7066c88d7a103fc60c5
diff --git a/y2016/autonomous/BUILD b/y2016/autonomous/BUILD
new file mode 100644
index 0000000..984b110
--- /dev/null
+++ b/y2016/autonomous/BUILD
@@ -0,0 +1,42 @@
+package(default_visibility = ['//visibility:public'])
+
+cc_library(
+  name = 'auto_lib',
+  srcs = [
+    'auto.cc',
+  ],
+  hdrs = [
+    'auto.h',
+  ],
+  deps = [
+    '//frc971/autonomous:auto_queue',
+    '//aos/common/controls:control_loop',
+    '//frc971/control_loops/drivetrain:drivetrain_queue',
+    '//y2014/control_loops/shooter:shooter_queue',
+    '//y2014/control_loops/claw:claw_queue',
+    '//y2014:constants',
+    '//aos/common:time',
+    '//aos/common/util:phased_loop',
+    '//aos/common/util:trapezoid_profile',
+    '//aos/common/logging',
+    '//aos/common/actions:action_lib',
+    '//y2014/actors:shoot_action_lib',
+    '//y2014/actors:drivetrain_action_lib',
+    '//y2014/queues:hot_goal',
+    '//aos/common/logging:queue_logging',
+    '//y2014/queues:profile_params',
+    '//y2014/queues:auto_mode',
+  ],
+)
+
+cc_binary(
+  name = 'auto',
+  srcs = [
+    'auto_main.cc',
+  ],
+  deps = [
+    '//aos/linux_code:init',
+    '//frc971/autonomous:auto_queue',
+    ':auto_lib',
+  ],
+)
diff --git a/y2016/autonomous/auto.cc b/y2016/autonomous/auto.cc
new file mode 100644
index 0000000..e954637
--- /dev/null
+++ b/y2016/autonomous/auto.cc
@@ -0,0 +1,532 @@
+#include <stdio.h>
+
+#include <memory>
+
+#include "aos/common/util/phased_loop.h"
+#include "aos/common/time.h"
+#include "aos/common/util/trapezoid_profile.h"
+#include "aos/common/logging/logging.h"
+#include "aos/common/logging/queue_logging.h"
+#include "aos/common/actions/actions.h"
+
+#include "frc971/autonomous/auto.q.h"
+#include "y2014/constants.h"
+#include "frc971/control_loops/drivetrain/drivetrain.q.h"
+#include "y2014/control_loops/shooter/shooter.q.h"
+#include "y2014/control_loops/claw/claw.q.h"
+#include "y2014/actors/shoot_actor.h"
+#include "y2014/actors/drivetrain_actor.h"
+#include "y2014/queues/auto_mode.q.h"
+
+#include "y2014/queues/hot_goal.q.h"
+#include "y2014/queues/profile_params.q.h"
+
+using ::aos::time::Time;
+
+namespace y2014 {
+namespace autonomous {
+
+namespace time = ::aos::time;
+
+static double left_initial_position, right_initial_position;
+
+bool ShouldExitAuto() {
+  ::frc971::autonomous::autonomous.FetchLatest();
+  bool ans = !::frc971::autonomous::autonomous->run_auto;
+  if (ans) {
+    LOG(INFO, "Time to exit auto mode\n");
+  }
+  return ans;
+}
+
+void StopDrivetrain() {
+  LOG(INFO, "Stopping the drivetrain\n");
+  frc971::control_loops::drivetrain_queue.goal.MakeWithBuilder()
+      .control_loop_driving(true)
+      .highgear(true)
+      .left_goal(left_initial_position)
+      .left_velocity_goal(0)
+      .right_goal(right_initial_position)
+      .right_velocity_goal(0)
+      .quickturn(false)
+      .Send();
+}
+
+void ResetDrivetrain() {
+  LOG(INFO, "resetting the drivetrain\n");
+  ::frc971::control_loops::drivetrain_queue.goal.MakeWithBuilder()
+      .control_loop_driving(false)
+      .highgear(true)
+      .steering(0.0)
+      .throttle(0.0)
+      .left_goal(left_initial_position)
+      .left_velocity_goal(0)
+      .right_goal(right_initial_position)
+      .right_velocity_goal(0)
+      .Send();
+}
+
+void WaitUntilDoneOrCanceled(
+    ::std::unique_ptr<aos::common::actions::Action> action) {
+  if (!action) {
+    LOG(ERROR, "No action, not waiting\n");
+    return;
+  }
+  while (true) {
+    // Poll the running bit and auto done bits.
+    ::aos::time::PhasedLoopXMS(10, 5000);
+    if (!action->Running() || ShouldExitAuto()) {
+      return;
+    }
+  }
+}
+
+void StepDrive(double distance, double theta) {
+  double left_goal = (left_initial_position + distance -
+                      theta * constants::GetValues().turn_width / 2.0);
+  double right_goal = (right_initial_position + distance +
+                       theta * constants::GetValues().turn_width / 2.0);
+  ::frc971::control_loops::drivetrain_queue.goal.MakeWithBuilder()
+      .control_loop_driving(true)
+      .highgear(true)
+      .left_goal(left_goal)
+      .right_goal(right_goal)
+      .left_velocity_goal(0.0)
+      .right_velocity_goal(0.0)
+      .Send();
+  left_initial_position = left_goal;
+  right_initial_position = right_goal;
+}
+
+void PositionClawVertically(double intake_power = 0.0, double centering_power = 0.0) {
+  if (!control_loops::claw_queue.goal.MakeWithBuilder()
+           .bottom_angle(0.0)
+           .separation_angle(0.0)
+           .intake(intake_power)
+           .centering(centering_power)
+           .Send()) {
+    LOG(WARNING, "sending claw goal failed\n");
+  }
+}
+
+void PositionClawBackIntake() {
+  if (!control_loops::claw_queue.goal.MakeWithBuilder()
+           .bottom_angle(-2.273474)
+           .separation_angle(0.0)
+           .intake(12.0)
+           .centering(12.0)
+           .Send()) {
+    LOG(WARNING, "sending claw goal failed\n");
+  }
+}
+
+void PositionClawUpClosed() {
+  // Move the claw to where we're going to shoot from but keep it closed until
+  // it gets there.
+  if (!control_loops::claw_queue.goal.MakeWithBuilder()
+           .bottom_angle(0.86)
+           .separation_angle(0.0)
+           .intake(4.0)
+           .centering(1.0)
+           .Send()) {
+    LOG(WARNING, "sending claw goal failed\n");
+  }
+}
+
+void PositionClawForShot() {
+  if (!control_loops::claw_queue.goal.MakeWithBuilder()
+           .bottom_angle(0.86)
+           .separation_angle(0.10)
+           .intake(4.0)
+           .centering(1.0)
+           .Send()) {
+    LOG(WARNING, "sending claw goal failed\n");
+  }
+}
+
+void SetShotPower(double power) {
+  LOG(INFO, "Setting shot power to %f\n", power);
+  if (!control_loops::shooter_queue.goal.MakeWithBuilder()
+           .shot_power(power)
+           .shot_requested(false)
+           .unload_requested(false)
+           .load_requested(false)
+           .Send()) {
+    LOG(WARNING, "sending shooter goal failed\n");
+  }
+}
+
+void WaitUntilNear(double distance) {
+  while (true) {
+    if (ShouldExitAuto()) return;
+    ::frc971::control_loops::drivetrain_queue.status.FetchAnother();
+    double left_error = ::std::abs(
+        left_initial_position -
+        ::frc971::control_loops::drivetrain_queue.status->filtered_left_position);
+    double right_error = ::std::abs(
+        right_initial_position -
+        ::frc971::control_loops::drivetrain_queue.status->filtered_right_position);
+    const double kPositionThreshold = 0.05 + distance;
+    if (right_error < kPositionThreshold && left_error < kPositionThreshold) {
+      LOG(INFO, "At the goal\n");
+      return;
+    }
+  }
+}
+
+const ProfileParams kFastDrive = {3.0, 2.5};
+const ProfileParams kSlowDrive = {2.5, 2.5};
+const ProfileParams kFastWithBallDrive = {3.0, 2.0};
+const ProfileParams kSlowWithBallDrive = {2.5, 2.0};
+const ProfileParams kFastTurn = {3.0, 10.0};
+
+::std::unique_ptr<::y2014::actors::DrivetrainAction> SetDriveGoal(
+    double distance, const ProfileParams drive_params, double theta = 0,
+    const ProfileParams &turn_params = kFastTurn) {
+  LOG(INFO, "Driving to %f\n", distance);
+
+  ::y2014::actors::DrivetrainActionParams params;
+  params.left_initial_position = left_initial_position;
+  params.right_initial_position = right_initial_position;
+  params.y_offset = distance;
+  params.theta_offset = theta;
+  params.maximum_turn_acceleration = turn_params.acceleration;
+  params.maximum_turn_velocity = turn_params.velocity;
+  params.maximum_velocity = drive_params.velocity;
+  params.maximum_acceleration = drive_params.acceleration;
+  auto drivetrain_action = actors::MakeDrivetrainAction(params);
+  drivetrain_action->Start();
+  left_initial_position +=
+      distance - theta * constants::GetValues().turn_width / 2.0;
+  right_initial_position +=
+      distance + theta * constants::GetValues().turn_width / 2.0;
+  return ::std::move(drivetrain_action);
+}
+
+void Shoot() {
+  // Shoot.
+  auto shoot_action = actors::MakeShootAction();
+  shoot_action->Start();
+  WaitUntilDoneOrCanceled(::std::move(shoot_action));
+}
+
+void InitializeEncoders() {
+  ::frc971::control_loops::drivetrain_queue.status.FetchAnother();
+  left_initial_position =
+      ::frc971::control_loops::drivetrain_queue.status->filtered_left_position;
+  right_initial_position =
+      ::frc971::control_loops::drivetrain_queue.status->filtered_right_position;
+}
+
+void WaitUntilClawDone() {
+  while (true) {
+    // Poll the running bit and auto done bits.
+    ::aos::time::PhasedLoopXMS(10, 5000);
+    control_loops::claw_queue.status.FetchLatest();
+    control_loops::claw_queue.goal.FetchLatest();
+    if (ShouldExitAuto()) {
+      return;
+    }
+    if (control_loops::claw_queue.status.get() == nullptr ||
+        control_loops::claw_queue.goal.get() == nullptr) {
+      continue;
+    }
+    bool ans =
+        control_loops::claw_queue.status->zeroed &&
+        (::std::abs(control_loops::claw_queue.status->bottom_velocity) <
+         1.0) &&
+        (::std::abs(control_loops::claw_queue.status->bottom -
+                    control_loops::claw_queue.goal->bottom_angle) <
+         0.10) &&
+        (::std::abs(control_loops::claw_queue.status->separation -
+                    control_loops::claw_queue.goal->separation_angle) <
+         0.4);
+    if (ans) {
+      return;
+    }
+    if (ShouldExitAuto()) return;
+  }
+}
+
+class HotGoalDecoder {
+ public:
+  HotGoalDecoder() {
+    ResetCounts();
+  }
+
+  void ResetCounts() {
+    hot_goal.FetchLatest();
+    if (hot_goal.get()) {
+      start_counts_ = *hot_goal;
+      LOG_STRUCT(INFO, "counts reset to", start_counts_);
+      start_counts_valid_ = true;
+    } else {
+      LOG(WARNING, "no hot goal message. ignoring\n");
+      start_counts_valid_ = false;
+    }
+  }
+
+  void Update(bool block = false) {
+    if (block) {
+      hot_goal.FetchAnother();
+    } else {
+      hot_goal.FetchLatest();
+    }
+    if (hot_goal.get()) LOG_STRUCT(INFO, "new counts", *hot_goal);
+  }
+
+  bool left_triggered() const {
+    if (!start_counts_valid_ || !hot_goal.get()) return false;
+    return (hot_goal->left_count - start_counts_.left_count) > kThreshold;
+  }
+
+  bool right_triggered() const {
+    if (!start_counts_valid_ || !hot_goal.get()) return false;
+    return (hot_goal->right_count - start_counts_.right_count) > kThreshold;
+  }
+
+  bool is_left() const {
+    if (!start_counts_valid_ || !hot_goal.get()) return false;
+    const uint64_t left_difference =
+        hot_goal->left_count - start_counts_.left_count;
+    const uint64_t right_difference =
+        hot_goal->right_count - start_counts_.right_count;
+    if (left_difference > kThreshold) {
+      if (right_difference > kThreshold) {
+        // We've seen a lot of both, so pick the one we've seen the most of.
+        return left_difference > right_difference;
+      } else {
+        // We've seen enough left but not enough right, so go with it.
+        return true;
+      }
+    } else {
+      // We haven't seen enough left, so it's not left.
+      return false;
+    }
+  }
+
+  bool is_right() const {
+    if (!start_counts_valid_ || !hot_goal.get()) return false;
+    const uint64_t left_difference =
+        hot_goal->left_count - start_counts_.left_count;
+    const uint64_t right_difference =
+        hot_goal->right_count - start_counts_.right_count;
+    if (right_difference > kThreshold) {
+      if (left_difference > kThreshold) {
+        // We've seen a lot of both, so pick the one we've seen the most of.
+        return right_difference > left_difference;
+      } else {
+        // We've seen enough right but not enough left, so go with it.
+        return true;
+      }
+    } else {
+      // We haven't seen enough right, so it's not right.
+      return false;
+    }
+  }
+
+ private:
+  static const uint64_t kThreshold = 5;
+
+  ::y2014::HotGoal start_counts_;
+  bool start_counts_valid_;
+};
+
+void HandleAuto() {
+  enum class AutoVersion : uint8_t {
+    kStraight,
+    kDoubleHot,
+    kSingleHot,
+  };
+
+  // The front of the robot is 1.854 meters from the wall
+  static const double kShootDistance = 3.15;
+  static const double kPickupDistance = 0.5;
+  static const double kTurnAngle = 0.3;
+
+  ::aos::time::Time start_time = ::aos::time::Time::Now();
+  LOG(INFO, "Handling auto mode\n");
+
+  AutoVersion auto_version;
+  ::y2014::sensors::auto_mode.FetchLatest();
+  if (!::y2014::sensors::auto_mode.get()) {
+    LOG(WARNING, "not sure which auto mode to use\n");
+    auto_version = AutoVersion::kStraight;
+  } else {
+    static const double kSelectorMin = 0.2, kSelectorMax = 4.4;
+
+    const double kSelectorStep = (kSelectorMax - kSelectorMin) / 3.0;
+    if (::y2014::sensors::auto_mode->voltage < kSelectorStep + kSelectorMin) {
+      auto_version = AutoVersion::kSingleHot;
+    } else if (::y2014::sensors::auto_mode->voltage <
+               2 * kSelectorStep + kSelectorMin) {
+      auto_version = AutoVersion::kStraight;
+    } else {
+      auto_version = AutoVersion::kDoubleHot;
+    }
+  }
+  LOG(INFO, "running auto %" PRIu8 "\n", static_cast<uint8_t>(auto_version));
+
+  const ProfileParams &drive_params =
+      (auto_version == AutoVersion::kStraight) ? kFastDrive : kSlowDrive;
+  const ProfileParams &drive_with_ball_params =
+      (auto_version == AutoVersion::kStraight) ? kFastWithBallDrive
+                                               : kSlowWithBallDrive;
+
+  HotGoalDecoder hot_goal_decoder;
+  // True for left, false for right.
+  bool first_shot_left, second_shot_left_default, second_shot_left;
+
+  ResetDrivetrain();
+
+  time::SleepFor(time::Time::InSeconds(0.1));
+  if (ShouldExitAuto()) return;
+  InitializeEncoders();
+
+  // Turn the claw on, keep it straight up until the ball has been grabbed.
+  LOG(INFO, "Claw going up at %f\n",
+      (::aos::time::Time::Now() - start_time).ToSeconds());
+  PositionClawVertically(12.0, 4.0);
+  SetShotPower(115.0);
+
+  // Wait for the ball to enter the claw.
+  time::SleepFor(time::Time::InSeconds(0.25));
+  if (ShouldExitAuto()) return;
+  LOG(INFO, "Readying claw for shot at %f\n",
+      (::aos::time::Time::Now() - start_time).ToSeconds());
+
+  {
+    if (ShouldExitAuto()) return;
+    // Drive to the goal.
+    auto drivetrain_action = SetDriveGoal(-kShootDistance, drive_params);
+    time::SleepFor(time::Time::InSeconds(0.75));
+    PositionClawForShot();
+    LOG(INFO, "Waiting until drivetrain is finished\n");
+    WaitUntilDoneOrCanceled(::std::move(drivetrain_action));
+    if (ShouldExitAuto()) return;
+  }
+
+  hot_goal_decoder.Update();
+  if (hot_goal_decoder.is_left()) {
+    LOG(INFO, "first shot left\n");
+    first_shot_left = true;
+    second_shot_left_default = false;
+  } else if (hot_goal_decoder.is_right()) {
+    LOG(INFO, "first shot right\n");
+    first_shot_left = false;
+    second_shot_left_default = true;
+  } else {
+    LOG(INFO, "first shot defaulting left\n");
+    first_shot_left = true;
+    second_shot_left_default = true;
+  }
+  if (auto_version == AutoVersion::kDoubleHot) {
+    if (ShouldExitAuto()) return;
+    auto drivetrain_action = SetDriveGoal(
+        0, drive_with_ball_params, first_shot_left ? kTurnAngle : -kTurnAngle);
+    WaitUntilDoneOrCanceled(::std::move(drivetrain_action));
+    if (ShouldExitAuto()) return;
+  } else if (auto_version == AutoVersion::kSingleHot) {
+    do {
+      // TODO(brians): Wait for next message with timeout or something.
+      ::aos::time::SleepFor(::aos::time::Time::InSeconds(0.003));
+      hot_goal_decoder.Update(false);
+      if (ShouldExitAuto()) return;
+    } while (!hot_goal_decoder.left_triggered() &&
+             (::aos::time::Time::Now() - start_time) <
+                 ::aos::time::Time::InSeconds(9));
+  } else if (auto_version == AutoVersion::kStraight) {
+    time::SleepFor(time::Time::InSeconds(0.4));
+  }
+
+  // Shoot.
+  LOG(INFO, "Shooting at %f\n",
+      (::aos::time::Time::Now() - start_time).ToSeconds());
+  Shoot();
+  time::SleepFor(time::Time::InSeconds(0.05));
+
+  if (auto_version == AutoVersion::kDoubleHot) {
+    if (ShouldExitAuto()) return;
+    auto drivetrain_action = SetDriveGoal(
+        0, drive_with_ball_params, first_shot_left ? -kTurnAngle : kTurnAngle);
+    WaitUntilDoneOrCanceled(::std::move(drivetrain_action));
+    if (ShouldExitAuto()) return;
+  } else if (auto_version == AutoVersion::kSingleHot) {
+    LOG(INFO, "auto done at %f\n",
+        (::aos::time::Time::Now() - start_time).ToSeconds());
+    PositionClawVertically(0.0, 0.0);
+    return;
+  }
+
+  {
+    if (ShouldExitAuto()) return;
+    // Intake the new ball.
+    LOG(INFO, "Claw ready for intake at %f\n",
+        (::aos::time::Time::Now() - start_time).ToSeconds());
+    PositionClawBackIntake();
+    auto drivetrain_action =
+        SetDriveGoal(kShootDistance + kPickupDistance, drive_params);
+    LOG(INFO, "Waiting until drivetrain is finished\n");
+    WaitUntilDoneOrCanceled(::std::move(drivetrain_action));
+    if (ShouldExitAuto()) return;
+    LOG(INFO, "Wait for the claw at %f\n",
+        (::aos::time::Time::Now() - start_time).ToSeconds());
+    WaitUntilClawDone();
+    if (ShouldExitAuto()) return;
+  }
+
+  // Drive back.
+  {
+    LOG(INFO, "Driving back at %f\n",
+        (::aos::time::Time::Now() - start_time).ToSeconds());
+    auto drivetrain_action =
+        SetDriveGoal(-(kShootDistance + kPickupDistance), drive_params);
+    time::SleepFor(time::Time::InSeconds(0.3));
+    hot_goal_decoder.ResetCounts();
+    if (ShouldExitAuto()) return;
+    PositionClawUpClosed();
+    WaitUntilClawDone();
+    if (ShouldExitAuto()) return;
+    PositionClawForShot();
+    LOG(INFO, "Waiting until drivetrain is finished\n");
+    WaitUntilDoneOrCanceled(::std::move(drivetrain_action));
+    if (ShouldExitAuto()) return;
+    WaitUntilClawDone();
+    if (ShouldExitAuto()) return;
+  }
+
+  hot_goal_decoder.Update();
+  if (hot_goal_decoder.is_left()) {
+    LOG(INFO, "second shot left\n");
+    second_shot_left = true;
+  } else if (hot_goal_decoder.is_right()) {
+    LOG(INFO, "second shot right\n");
+    second_shot_left = false;
+  } else {
+    LOG(INFO, "second shot defaulting %s\n",
+        second_shot_left_default ? "left" : "right");
+    second_shot_left = second_shot_left_default;
+  }
+  if (auto_version == AutoVersion::kDoubleHot) {
+    if (ShouldExitAuto()) return;
+    auto drivetrain_action = SetDriveGoal(
+        0, drive_params, second_shot_left ? kTurnAngle : -kTurnAngle);
+    WaitUntilDoneOrCanceled(::std::move(drivetrain_action));
+    if (ShouldExitAuto()) return;
+  } else if (auto_version == AutoVersion::kStraight) {
+    time::SleepFor(time::Time::InSeconds(0.4));
+  }
+
+  LOG(INFO, "Shooting at %f\n",
+      (::aos::time::Time::Now() - start_time).ToSeconds());
+  // Shoot
+  Shoot();
+  if (ShouldExitAuto()) return;
+
+  // Get ready to zero when we come back up.
+  time::SleepFor(time::Time::InSeconds(0.05));
+  PositionClawVertically(0.0, 0.0);
+}
+
+}  // namespace autonomous
+}  // namespace y2014
diff --git a/y2016/autonomous/auto.h b/y2016/autonomous/auto.h
new file mode 100644
index 0000000..dd00bba
--- /dev/null
+++ b/y2016/autonomous/auto.h
@@ -0,0 +1,12 @@
+#ifndef Y2014_AUTONOMOUS_AUTO_H_
+#define Y2014_AUTONOMOUS_AUTO_H_
+
+namespace y2014 {
+namespace autonomous {
+
+void HandleAuto();
+
+}  // namespace autonomous
+}  // namespace y2014
+
+#endif  // Y2014_AUTONOMOUS_AUTO_H_
diff --git a/y2016/autonomous/auto_main.cc b/y2016/autonomous/auto_main.cc
new file mode 100644
index 0000000..bf3acf8
--- /dev/null
+++ b/y2016/autonomous/auto_main.cc
@@ -0,0 +1,42 @@
+#include <stdio.h>
+
+#include "aos/common/time.h"
+#include "aos/linux_code/init.h"
+#include "aos/common/logging/logging.h"
+#include "frc971/autonomous/auto.q.h"
+#include "y2014/autonomous/auto.h"
+
+using ::aos::time::Time;
+
+int main(int /*argc*/, char * /*argv*/[]) {
+  ::aos::Init(-1);
+
+  LOG(INFO, "Auto main started\n");
+  ::frc971::autonomous::autonomous.FetchLatest();
+  while (!::frc971::autonomous::autonomous.get()) {
+    ::frc971::autonomous::autonomous.FetchNextBlocking();
+    LOG(INFO, "Got another auto packet\n");
+  }
+
+  while (true) {
+    while (!::frc971::autonomous::autonomous->run_auto) {
+      ::frc971::autonomous::autonomous.FetchNextBlocking();
+      LOG(INFO, "Got another auto packet\n");
+    }
+    LOG(INFO, "Starting auto mode\n");
+    ::aos::time::Time start_time = ::aos::time::Time::Now();
+    ::y2014::autonomous::HandleAuto();
+
+    ::aos::time::Time elapsed_time = ::aos::time::Time::Now() - start_time;
+    LOG(INFO, "Auto mode exited in %f, waiting for it to finish.\n",
+        elapsed_time.ToSeconds());
+    while (::frc971::autonomous::autonomous->run_auto) {
+      ::frc971::autonomous::autonomous.FetchNextBlocking();
+      LOG(INFO, "Got another auto packet\n");
+    }
+    LOG(INFO, "Waiting for auto to start back up.\n");
+  }
+  ::aos::Cleanup();
+  return 0;
+}
+