ros(8)自定义service数据
创建Persom.srv
新建srv文件夹
在srv文件夹中创建Persom.srv,编辑文件
string name uint8 age uint8 sex uint8 unknown = 0 uint8 male = 1 uint8 female = 2 --- string result
修改package,xml
add_service_files(
FILES
Person.srv
)
generate_messages(
DEPENDENCIES
std_msgs
)
修改cmake
find_package(catkin REQUIRED COMPONENTS
geometry_msgs
roscpp
rospy
std_msgs
turtlesim
message_generation #查找依赖
)
add_service_files(
FILES
Person.srv
)
generate_messages(
DEPENDENCIES
std_msgs
)
catkin_package(
# INCLUDE_DIRS include
# LIBRARIES learning_service
CATKIN_DEPENDS geometry_msgs roscpp rospy std_msgs turtlesim message_runtime
# DEPENDS system_lib
)
编译
catkin_make
编辑person_client.cpp
/** * 该例程将请求/show_person服务,服务数据类型learning_service::Person */ #include <ros/ros.h> #include "learning_service/Person.h" int main(int argc, char** argv) { // 初始化ROS节点 ros::init(argc, argv, "person_client"); // 创建节点句柄 ros::NodeHandle node; // 发现/spawn服务后,创建一个服务客户端,连接名为/spawn的service ros::service::waitForService("/show_person"); ros::ServiceClient person_client = node.serviceClient<learning_service::Person>("/show_person"); // 初始化learning_service::Person的请求数据 learning_service::Person srv; srv.request.name = "Tom"; srv.request.age = 20; srv.request.sex = learning_service::Person::Request::male; // 请求服务调用 ROS_INFO("Call service to show person[name:%s, age:%d, sex:%d]", srv.request.name.c_str(), srv.request.age, srv.request.sex); person_client.call(srv); // 显示服务调用结果 ROS_INFO("Show person result : %s", srv.response.result.c_str()); return 0; };
编辑person_server.cpp
/** * 该例程将执行/show_person服务,服务数据类型learning_service::Person */ #include <ros/ros.h> #include "learning_service/Person.h" // service回调函数,输入参数req,输出参数res bool personCallback(learning_service::Person::Request &req, learning_service::Person::Response &res) { // 显示请求数据 ROS_INFO("Person: name:%s age:%d sex:%d", req.name.c_str(), req.age, req.sex); // 设置反馈数据 res.result = "OK"; return true; } int main(int argc, char **argv) { // ROS节点初始化 ros::init(argc, argv, "person_server"); // 创建节点句柄 ros::NodeHandle n; // 创建一个名为/show_person的server,注册回调函数personCallback ros::ServiceServer person_service = n.advertiseService("/show_person", personCallback); // 循环等待回调函数 ROS_INFO("Ready to show person informtion."); ros::spin(); return 0; }
修改cmake
add_executable(person_server src/person_server.cpp) target_link_libraries(person_server ${catkin_LIBRARIES}) add_dependencies(person_server ${PROJECT_NAME}_gencpp) add_executable(person_client src/person_client.cpp) target_link_libraries(person_client ${catkin_LIBRARIES}) add_dependencies(person_client ${PROJECT_NAME}_gencpp)
编译:
catkin_make
运行:
rosrun service_example person_client
rosrun service_example person_server