Видео

docs.google.com/document/d/1UhnNwMvvbkQ2qlqVKP5hyokDJnrmjLauKgpU3GsB8Dk/edit

교수님 로봇랩에서 잘 적응하려면 ros말고도 뭐 공부하는게 좋을까요?

❤

<?xml version="1.0"?> <package format="2"> <name>ros_tutorials_topic</name> <version>0.0.0</version> <description>The ros_tutorials_topic package</description> <!-- One maintainer tag required, multiple allowed, one person per tag --> <!-- Example: --> <!-- <maintainer email="jane.doe@example.com">Jane Doe</maintainer> --> <maintainer email="ctclab@todo.todo">ctclab</maintainer> <!-- One license tag required, multiple allowed, one license per tag --> <!-- Commonly used license strings: --> <!-- BSD, MIT, Boost Software License, GPLv2, GPLv3, LGPLv2.1, LGPLv3 --> <license>TODO</license> <!-- Url tags are optional, but multiple are allowed, one per tag --> <!-- Optional attribute type can be: website, bugtracker, or repository --> <!-- Example: --> <!-- <url type="website">wiki.ros.org/ros_tutorials_topic</url> --> <!-- Author tags are optional, multiple are allowed, one per tag --> <!-- Authors do not have to be maintainers, but could be --> <!-- Example: --> <!-- <author email="jane.doe@example.com">Jane Doe</author> --> <!-- The *depend tags are used to specify dependencies --> <!-- Dependencies can be catkin packages or system dependencies --> <!-- Examples: --> <!-- Use depend as a shortcut for packages that are both build and exec dependencies --> <!-- <depend>roscpp</depend> --> <!-- Note that this is equivalent to the following: --> <!-- <build_depend>roscpp</build_depend> --> <!-- <exec_depend>roscpp</exec_depend> --> <!-- Use build_depend for packages you need at compile time: --> <!-- <build_depend>message_generation</build_depend> --> <!-- Use build_export_depend for packages you need in order to build against this package: --> <!-- <build_export_depend>message_generation</build_export_depend> --> <!-- Use buildtool_depend for build tool packages: --> <!-- <buildtool_depend>catkin</buildtool_depend> --> <!-- Use exec_depend for packages you need at runtime: --> <!-- <exec_depend>message_runtime</exec_depend> --> <!-- Use test_depend for packages you need only for testing: --> <!-- <test_depend>gtest</test_depend> --> <!-- Use doc_depend for packages you need only for building documentation: --> <!-- <doc_depend>doxygen</doc_depend> --> <buildtool_depend>catkin</buildtool_depend> <build_depend>message_generation</build_depend> <build_depend>roscpp</build_depend> <build_depend>std_msgs</build_depend> <build_export_depend>roscpp</build_export_depend> <build_export_depend>std_msgs</build_export_depend> <exec_depend>roscpp</exec_depend> <exec_depend>std_msgs</exec_depend> <exec_depend>message_runtime</exec_depend> <!-- The export tag contains other, unspecified, tags --> <export> <!-- Other tools can request additional information be placed here --> </export> </package>

sudo apt-get install python-catkin-tools

source /opt/ros/melodic/setup.bash source ~/catkin_ws/devel/setup.bash

sudo rm -rf build

source ~/.bashrc

#include "ros/ros.h" #include "ros_tutorials_topic/MsgTutorial.h" void msgCallback(const ros_tutorials_topic::MsgTutorial::ConstPtr& msg) { ROS_INFO("recieve msg=%d", msg->stamp.sec); ROS_INFO("recieve msg=%d", msg->stamp.nsec); ROS_INFO("recieve msg=%d", msg->data); } int main(int argc, char **argv) { ros::init(argc, argv, "topic_subscriber"); ros::NodeHandle nh; ros::Subscriber ros_tutorial_sub=nh.subscribe("ros_tutorial_msg",100,msgCallback); ros::spin(); return 0; }

#include "ros/ros.h" #include "ros_tutorials_topic/MsgTutorial.h" int main(int argc, char **argv) { ros::init(argc, argv, "topic_publisher"); ros::NodeHandle nh; ros::Publisher ros_tutorial_pub=nh.advertise<ros_tutorials_topic::MsgTutorial>("ros_tutorial_msg",100); ros::Rate loop_rate(10); ros_tutorials_topic::MsgTutorial msg; int count=0; while(ros::ok()) { msg.stamp=ros::Time::now(); msg.data=count; ROS_INFO("send msg=%d", msg.stamp.sec); ROS_INFO("send msg=%d", msg.stamp.nsec); ROS_INFO("send msg=%d", msg.data); ros_tutorial_pub.publish(msg); loop_rate.sleep(); ++count; } return 0; }

cmake_minimum_required(VERSION 3.0.2) project(ros_tutorials_topic) find_package(catkin REQUIRED COMPONENTS message_generation roscpp std_msgs) add_message_files(FILES MsgTutorial.msg) generate_messages(DEPENDENCIES std_msgs) catkin_package( LIBRARIES ros_tutorials_topic CATKIN_DEPENDS roscpp std_msgs ) include_directories(${catkin_INCLUDE_DIRS}) add_executable(topic_publisher src/topic_publisher.cpp) add_dependencies(topic_publisher ${${PROJECT_NAME}_EXPORTED_TARGETS} ${catkin_EXPORTED_TARGETS}) target_link_libraries(topic_publisher ${catkin_LIBRARIES}) add_executable(topic_subscriber src/topic_subscriber.cpp) add_dependencies(topic_subscriber ${${PROJECT_NAME}_EXPORTED_TARGETS} ${catkin_EXPORTED_TARGETS}) target_link_libraries(topic_subscriber ${catkin_LIBRARIES})

<exec_depend>message_runtime</exec_depend>

catkin_create_pkg ros_tutorials_topic message_generation std_msgs roscpp

안녕하세요 교수님 영상 방법대로 조치해서 rqt는 실행이 됐는데 rviz 는 Segmentation fault (core dumped) 라는 문구가 뜨면서 열리다가 죽습니다.

안녕하세요 이세진 교수님. 영상 잘 봤습니다. 저도 졸업작품을 위해 젯슨 나노를 사용할 계획입니다. 유선 랜을 연결하여 인터넷을 이용하려는 과정에서 이더넷이 계속 disconnect 되는데 혹시 해결 방법을 조언해 주실 수 있으실까요?

자세히 설명 해 주시네요.