DbwNode.h

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#ifndef _DBW_NODE_H_
#define _DBW_NODE_H_

#include <ros/ros.h>

// ROS messages
#include <can_msgs/Frame.h>
#include <dbw_fca_msgs/BrakeCmd.h>
#include <dbw_fca_msgs/BrakeReport.h>
#include <dbw_fca_msgs/ThrottleCmd.h>
#include <dbw_fca_msgs/ThrottleReport.h>
#include <dbw_fca_msgs/SteeringCmd.h>
#include <dbw_fca_msgs/SteeringReport.h>
#include <dbw_fca_msgs/GearCmd.h>
#include <dbw_fca_msgs/GearReport.h>
#include <dbw_fca_msgs/TurnSignalCmd.h>
#include <dbw_fca_msgs/Misc1Report.h>
#include <dbw_fca_msgs/WheelPositionReport.h>
#include <dbw_fca_msgs/WheelSpeedReport.h>
#include <dbw_fca_msgs/FuelLevelReport.h>
#include <dbw_fca_msgs/BrakeInfoReport.h>
#include <dbw_fca_msgs/ThrottleInfoReport.h>
#include <sensor_msgs/JointState.h>
#include <geometry_msgs/TwistStamped.h>
#include <std_msgs/Empty.h>
#include <std_msgs/Bool.h>
#include <std_msgs/String.h>

// Platform and module version map
#include <dbw_fca_can/PlatformMap.h>

namespace dbw_fca_can
{

class DbwNode
{
public:
  DbwNode(ros::NodeHandle &node, ros::NodeHandle &priv_nh);
  ~DbwNode();

private:
  void timerCallback(const ros::TimerEvent& event);
  void recvEnable(const std_msgs::Empty::ConstPtr& msg);
  void recvDisable(const std_msgs::Empty::ConstPtr& msg);
  void recvCAN(const can_msgs::Frame::ConstPtr& msg);
  void recvBrakeCmd(const dbw_fca_msgs::BrakeCmd::ConstPtr& msg);
  void recvThrottleCmd(const dbw_fca_msgs::ThrottleCmd::ConstPtr& msg);
  void recvSteeringCmd(const dbw_fca_msgs::SteeringCmd::ConstPtr& msg);
  void recvGearCmd(const dbw_fca_msgs::GearCmd::ConstPtr& msg);
  void recvTurnSignalCmd(const dbw_fca_msgs::TurnSignalCmd::ConstPtr& msg);

  ros::Timer timer_;
  bool prev_enable_;
  bool enable_;
  bool override_brake_;
  bool override_throttle_;
  bool override_steering_;
  bool override_gear_;
  bool fault_brakes_;
  bool fault_throttle_;
  bool fault_steering_;
  bool fault_steering_cal_;
  bool fault_watchdog_;
  bool fault_watchdog_using_brakes_;
  bool fault_watchdog_warned_;
  bool timeout_brakes_;
  bool timeout_throttle_;
  bool timeout_steering_;
  bool enabled_brakes_;
  bool enabled_throttle_;
  bool enabled_steering_;
  bool gear_warned_;
  inline bool fault() { return fault_brakes_ || fault_throttle_ || fault_steering_ || fault_steering_cal_ || fault_watchdog_; }
  inline bool override() { return override_brake_ || override_throttle_ || override_steering_ || override_gear_; }
  inline bool clear() { return enable_ && override(); }
  inline bool enabled() { return enable_ && !fault() && !override(); }
  bool publishDbwEnabled();
  void enableSystem();
  void disableSystem();
  void buttonCancel();
  void overrideBrake(bool override, bool timeout);
  void overrideThrottle(bool override, bool timeout);
  void overrideSteering(bool override, bool timeout);
  void overrideGear(bool override);
  void timeoutBrake(bool timeout, bool enabled);
  void timeoutThrottle(bool timeout, bool enabled);
  void timeoutSteering(bool timeout, bool enabled);
  void faultBrakes(bool fault);
  void faultThrottle(bool fault);
  void faultSteering(bool fault);
  void faultSteeringCal(bool fault);
  void faultWatchdog(bool fault, uint8_t src, bool braking);
  void faultWatchdog(bool fault, uint8_t src = 0);

  enum {
    JOINT_FL = 0, // Front left wheel
    JOINT_FR, // Front right wheel
    JOINT_RL, // Rear left wheel
    JOINT_RR, // Rear right wheel
    JOINT_SL, // Steering left
    JOINT_SR, // Steering right
    JOINT_COUNT, // Number of joints
  };
  sensor_msgs::JointState joint_state_;
  void publishJointStates(const ros::Time &stamp, const dbw_fca_msgs::SteeringReport *steering);

  // The signum function: https://stackoverflow.com/questions/1903954/
  template <typename T> static int sgn(T val) {
      return ((T)0 < val) - (val < (T)0);
  }

  // Sign of the wheel velocities, to be multiplied with vehicle speed
  float speedSign() const {
    return sgn(joint_state_.velocity[JOINT_FL]) + sgn(joint_state_.velocity[JOINT_FR]) +
           sgn(joint_state_.velocity[JOINT_RL]) + sgn(joint_state_.velocity[JOINT_RR]) < 0 ? -1.0 : 1.0;
  }

  // Licensing
  std::string vin_;
  std::string date_;

  // Firmware Versions
  PlatformMap firmware_;

  // Frame ID
  std::string frame_id_;

  // Command warnings
  bool warn_cmds_;

  // Buttons (enable/disable)
  bool buttons_;

  // Pedal LUTs (local/embedded)
  bool pedal_luts_;

  // Ackermann steering
  double acker_wheelbase_;
  double acker_track_;
  double steering_ratio_;
  double wheel_radius_;

  // Subscribed topics
  ros::Subscriber sub_enable_;
  ros::Subscriber sub_disable_;
  ros::Subscriber sub_can_;
  ros::Subscriber sub_brake_;
  ros::Subscriber sub_throttle_;
  ros::Subscriber sub_steering_;
  ros::Subscriber sub_gear_;
  ros::Subscriber sub_turn_signal_;

  // Published topics
  ros::Publisher pub_can_;
  ros::Publisher pub_brake_;
  ros::Publisher pub_throttle_;
  ros::Publisher pub_steering_;
  ros::Publisher pub_gear_;
  ros::Publisher pub_misc_1_;
  ros::Publisher pub_wheel_speeds_;
  ros::Publisher pub_wheel_positions_;
  ros::Publisher pub_fuel_level_;
  ros::Publisher pub_brake_info_;
  ros::Publisher pub_throttle_info_;
  ros::Publisher pub_joint_states_;
  ros::Publisher pub_twist_;
  ros::Publisher pub_vin_;
  ros::Publisher pub_sys_enable_;
};

} // namespace dbw_fca_can

#endif // _DBW_NODE_H_