root / scout / libscout / src / SonarControl.cpp @ 65c7f52b
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/**
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* Copyright (c) 2011 Colony Project
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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**/
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/**
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* @file SonarControl.cpp
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* @brief Contains sonar function imeplementations
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*
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* Contains functions for the use of sonar control.
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*
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* @author Colony Project, CMU Robotics Club
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* @author Priyanka Deo
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**/
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#include "SonarControl.h" |
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/**
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* @brief Initialize the sonar module of libscout.
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*
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* Initialize the libscout node as a publisher of sonar_set_scan and
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* sonar_toggle and a client of query_sonar.
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*/
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SonarControl::SonarControl(const ros::NodeHandle& libscout_node)
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: node(libscout_node) |
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{ |
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sonar_set_scan_pub = |
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node.advertise<sonar::sonar_set_scan>("set_sonar_scan", QUEUE_SIZE);
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sonar_toggle_pub = |
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node.advertise<sonar::sonar_toggle>("toggle_sonar", QUEUE_SIZE);
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query_sonar = |
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node.serviceClient<sonar::sonar_direction>("query_sonar");
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} |
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/**
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* @brief Sets the sonar to a position.
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*
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* @param position Value between 0-180 of degree position to set sonar
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* @return NONE
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*/
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void SonarControl::set(int position) |
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{ |
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set_range(position, position); |
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} |
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/**
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* @brief Sets the sonar to scan between two positions
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*
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* @param start_pos The leftmost (smallest) value that the sonar can take
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* @param end_pos The rightmost (largest) value that the sonar can take
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* @return NONE
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*/
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void SonarControl::set_range(int start_pos, int end_pos) |
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{ |
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//TODO Enable some checks of start and end position
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sonar::sonar_set_scan msg; |
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msg.stop_l = start_pos; |
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msg.stop_r = end_pos; |
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sonar_set_scan_pub.publish(msg); |
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ros::spinOnce(); |
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} |
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/**
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* @brief Query the current front sonar readings
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*
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* Sends a request to the query_sonar service which will reply with the
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* current readings of the sonar.
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*
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* @TODO Change so we can get multiple sonar readings with one call
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*
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* @return The reading of the front sonar or LIB_ERR.
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*/
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float SonarControl::query_front()
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{ |
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sonar::sonar_direction srv; |
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if(query_sonar.call(srv))
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{ |
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srv.response.distance0; |
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} |
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else
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{ |
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ROS_ERROR("Failed to call service query_motors");
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return LIB_ERROR;
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} |
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return 0; |
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} |
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/**
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* @brief Query the current back sonar readings
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*
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* Sends a request to the query_sonar service which will reply with the
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* current readings of the sonar.
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*
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* @TODO Change so we can get multiple sonar readings with one call
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*
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* @return The reading of the back sonar or LIB_ERR.
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*/
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float SonarControl::query_back()
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{ |
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sonar::sonar_direction srv; |
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if(query_sonar.call(srv))
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{ |
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srv.response.distance1; |
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} |
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else
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{ |
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ROS_ERROR("Failed to call service query_motors");
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return LIB_ERROR;
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} |
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return 0; |
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} |
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/**
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* @brief Converts value returne by sonar to physical distances.
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*
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* @param sonar_value The returned value of the sonar
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* @return The physical distance measured by the sonar.
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**/
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float sonar_to_dist(float sonar_value) |
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{ |
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//TODO impelement later based on sonar readings
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return sonar_value;
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} |
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/**
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* @brief Converts values from physical distances to values read by sonar
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*
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* @param distance The physical distance as measured.
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* @return The value read by the sonar that corresponds to the given distance
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**/
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float dist_to_sonar(float distance) |
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{ |
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//TODO implement later based on sonar readings
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return distance;
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} |