要在ROS 1和ROS 2之间建立桥接器,使它们能够进行通信,可以使用ROS 1 <-> ROS 2桥接器来实现。以下是配置ROS 1 <-> ROS 2桥接器的步骤:
1、安装ROS 1 <-> ROS 2桥接器软件包:
首先,确保你已经在ROS 1和ROS 2环境中安装了适当的软件包管理工具(如apt或者colcon)。然后,执行以下命令安装ROS 1 <-> ROS 2桥接器软件包:
# 在ROS 1环境中执行
$ sudo apt-get install ros-noetic-ros1-bridge
# 在ROS 2环境中执行
$ sudo apt-get install ros-foxy-ros2-bridge
2、启动ROS 1 <-> ROS 2桥接器:
在终端中执行以下命令来启动ROS 1 <-> ROS 2桥接器:
$ source /opt/ros/noetic/setup.bash # 在ROS 1环境中执行
$ source /opt/ros/foxy/setup.bash # 在ROS 2环境中执行
$ ros2 run ros1_bridge dynamic_bridge
这将启动ROS 1 <-> ROS 2桥接器,使ROS 1和ROS 2之间建立桥接通信。
3 、在ROS 1中发布/订阅ROS 2话题:
一旦ROS 1 <-> ROS 2桥接器启动,你就可以在ROS 1中发布和订阅ROS 2话题。在ROS 1节点的代码中,你可以使用ROS 1的API来发布和订阅ROS 2话题。
ROS 1中对应消息:
// Created by litao 2023-7-10
#include <ros/ros.h>
#include <geometry_msgs/Point.h>
#include <std_msgs/Bool.h>
#include <rm_msgs/MoveJ_P.h>
#include <rm_msgs/Gripper_Set.h>
#include <rm_msgs/Gripper_Pick.h>
#include <rm_msgs/Plan_State.h>
// 接收到订阅的机械臂执行状态消息后,进入消息回调函数
void planStateCallback(const rm_msgs::Plan_State::ConstPtr& msg)
{
// 将接收到的消息打印出来,显示机械臂是否完成运动
if (msg->state)
{
ROS_INFO("*******Plan State OK");
}
else
{
ROS_INFO("*******Plan State Fail");
}
}
// 封装函数,输入moveJ_P_TargetPoseA的xyz三个参数、开夹爪、关夹爪
void GrabAction(double x, double y, double z)
{
// ...
// GrabAction implementation
// ...
}
void PutdownAction(double x, double y, double z)
{
// ...
// PutdownAction implementation
// ...
}
void positionCallback(const geometry_msgs::Point::ConstPtr& position_msg, const std_msgs::Bool::ConstPtr& grab_msg)
{
double x = position_msg->x;
double y = position_msg->y;
double z = position_msg->z;
bool grab = grab_msg->data;
if (grab)
{
GrabAction(x, y, z);
}
else
{
PutdownAction(x, y, z);
}
}
int main(int argc, char** argv)
{
ros::init(argc, argv, "i41la_arm");
ros::NodeHandle nh;
// 创建一个ROS 1订阅器,用于接收ROS 2发布的位置和夹取/放下指令
ros::Subscriber sub = nh.subscribe<geometry_msgs::Point, std_msgs::Bool>("/ros2_position", 10, positionCallback);
ros::spin();
return 0;
}
3、ROS2 端发布消息:
import rclpy
from rclpy.node import Node
from geometry_msgs.msg import Point
from std_msgs.msg import Bool
class PositionPublisher(Node):
def __init__(self):
super().__init__('position_publisher')
self.position_pub = self.create_publisher(Point, 'ros2_position', 10)
self.grab_pub = self.create_publisher(Bool, 'ros2_grab', 10)
def publish_position(self, x, y, z, grab):
position_msg = Point()
position_msg.x = x
position_msg.y = y
position_msg.z = z
grab_msg = Bool()
grab_msg.data = grab
self.position_pub.publish(position_msg)
self.grab_pub.publish(grab_msg)
def main(args=None):
rclpy.init(args=args)
publisher = PositionPublisher()
# Publish the position and grab/release command
publisher.publish_position(-0.317239, 0.120903, 0.100000, True) # Example: Grab
# publisher.publish_position(-0.317239, 0.120903, 0.100000, False) # Example: Putdown
rclpy.spin(publisher)
publisher.destroy_node()
rclpy.shutdown()
if __name__ == '__main__':
main()
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