srh_syntouch_controllers.cpp

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#include "../example/srh_syntouch_controllers.hpp"
#include "angles/angles.h"
#include "pluginlib/class_list_macros.h"
#include <sstream>
#include <math.h>
#include <sr_utilities/sr_math_utils.hpp>
#include <std_msgs/Float64.h>

PLUGINLIB_DECLARE_CLASS(sr_mechanism_controllers, SrhSyntouchController, controller::SrhSyntouchController, pr2_controller_interface::Controller)

using namespace std;

namespace controller {

  SrhSyntouchController::SrhSyntouchController()
    : SrController()
  {
  }

  SrhSyntouchController::~SrhSyntouchController()
  {
    sub_command_.shutdown();
  }

  bool SrhSyntouchController::init(pr2_mechanism_model::RobotState *robot, const std::string &joint_name)
  {
    ROS_DEBUG(" --------- ");
    ROS_DEBUG_STREAM("Init: " << joint_name);

    assert(robot);
    robot_ = robot;
    last_time_ = robot->getTime();

    joint_state_ = robot_->getJointState(joint_name);
    if (!joint_state_)
    {
      ROS_ERROR("SrhMixedPositionVelocityController could not find joint named \"%s\"\n",
                joint_name.c_str());
      return false;
    }
    if (!joint_state_->calibrated_)
    {
      ROS_ERROR("Joint %s not calibrated for SrhSyntouchController", joint_name.c_str());
      return false;
    }

    //init the pointer to the biotacs data, updated at 1kHz
    actuator_ = static_cast<sr_actuator::SrActuator*>( robot->model_->getActuator( joint_name ) );

    after_init();
    return true;
  }

  bool SrhSyntouchController::init(pr2_mechanism_model::RobotState *robot, ros::NodeHandle &n)
  {
    assert(robot);
    node_ = n;

    std::string joint_name;
    if (!node_.getParam("joint", joint_name)) {
      ROS_ERROR("No joint given (namespace: %s)", node_.getNamespace().c_str());
      return false;
    }

    return init(robot, joint_name);
  }


  void SrhSyntouchController::starting()
  {
    command_ = joint_state_->position_;

    ROS_WARN("Reseting PID");
  }

  void SrhSyntouchController::update()
  {
    if (!joint_state_->calibrated_)
      return;

    assert(robot_ != NULL);
    ros::Time time = robot_->getTime();
    assert(joint_state_->joint_);
    dt_= time - last_time_;

    if (!initialized_)
    {
      initialized_ = true;
      command_ = joint_state_->position_;
    }

    // POSITION
    //Compute position error:
    double error_position = command_ - joint_state_->position_;

    // TACTILES
    //you have access here to the whole data coming from the 5 tactiles at full speed.
    double my_first_finger_tactile_pac0 = actuator_->state_.tactiles_->at(0).biotac.pac0;
    if(loop_count_ % 10 == 0)
    {
      ROS_ERROR_STREAM("PAC0, tactile " << my_first_finger_tactile_pac0);
    }

    // EFFORT
    //Compute the commanded effort to send to the motor
    double commanded_effort = 0.0;
    //TODO: compute the force demand by combining the information you
    // want. You can have a look at the mixed controller to see a
    // working implementation of a controller using different pid loops.

    joint_state_->commanded_effort_ = commanded_effort;

    if(loop_count_ % 10 == 0)
    {
      if(controller_state_publisher_ && controller_state_publisher_->trylock())
      {
        controller_state_publisher_->msg_.header.stamp = time;
        controller_state_publisher_->msg_.set_point = command_;

        controller_state_publisher_->msg_.process_value = joint_state_->position_;
        controller_state_publisher_->msg_.process_value_dot = joint_state_->velocity_;

        controller_state_publisher_->msg_.error = error_position;
        controller_state_publisher_->msg_.time_step = dt_.toSec();

        controller_state_publisher_->msg_.command = commanded_effort;
        controller_state_publisher_->msg_.measured_effort = joint_state_->measured_effort_;

        controller_state_publisher_->unlockAndPublish();
      }
    }
    loop_count_++;

    last_time_ = time;
  }
}

/* For the emacs weenies in the crowd.
Local Variables:
   c-basic-offset: 2
End:
*/