从去年7月份左右开始接触ROS,一直都想整理一些东西出来和大家分享以下.可惜一直没执行下去.静不下心来整理,而且说实话,本人学的
也不怎么样.权作学习笔记.
其实很多都是直接从网站上面照着抄下来的.ROS网站上面资料非常齐全,
ROS 安装:
ROS安装其实很简单.按照如下网站中的步骤,一步一步执行即可.如果你想从源码编译安装,可参考参考网站2(不推荐)
参考网站1:
http://wiki.ros.org/indigo/Installation/Ubuntu
参考网站1:
http://wiki.ros.org/indigo/Installation/Source
Environment setup:
1. It's convenientif the ROS environment variables are automatically added to your bashsession every time a new shell is launched:
$ echo "source/opt/ros/indigo/setup.bash" >> ~/.bashrc
$ source ~/.bashrc
2. If you just wantto change the environment of your current shell, you can type:
$ source/opt/ros/indigo/setup.bash
Cteate a ROS Workspace
1. Creating a new workspace
The following command creates a new workspace in ~/workspace/ROS which extends the set of packages install in /opt/ros/indigo
$ rosws init ~/workspace/ROS /opt/ros/indigo
$ source ~/workspace/ROS/setup.bash
(该方式配置,每次打开终端均需配置该环境.如果想每次自动加载,参考环境配置的方式)
rosws命令是rosinstall package中命令.如果没有安装,输入下诉命令安装
$ sudo apt-get install python-rosinstall
2. Creating a sandbox directory for new packages.
New packages need to be put in a path that is in the variable ROS_PACKAGE_PATH.All directories that are managed by rows, i.e. that have been added using rosws are automatically added to the ROS_PACKAGE_PATH when the file setup.bash of the corresponding workspace is sourced.
$ mkdir ~/workspace/ROS/theFirstPackage
$ rosws set ~/workspace/ROS/theFirstPackage
3. Confirmation
To confirm that your package path has been set, echo the ROS_PACKAGE_PATH variable.
$ echo $ROS_PACKAGE_PATH
You should see something similar to:
/home/burial/workspace/ROS/camera:/opt/ros/indigo/share:/opt/ros/indigo/stacks
小试牛刀:
安装ROS成功后,在Beginner Tutorials中有一个简单的示例程序.
1. 在Terminal中输入下诉命令.我的理解是,该命令是初始化ROS环境,全局参数,以及每个节点注册等工作.
$ roscore
$ rosrun turtlesim turtlesim_node
$ rosrun turtlesim turtle_teleop_key
4. 选中最后打开的Terminal,键盘按下上下左右按键,可看到控制小乌龟移动.
5. 再打开一个Terminal,输入下诉命令,可以看到当前ROS nodes以及Topic等图形展示.
$ rosrun rqt_graph rqt_graph
由上图可见,左右两边矩形为ROS node,中间连线上是Topic名称.