quadruped_ros2_control/descriptions/go2_description/xacro/ros2_control.xacro

<?xml version="1.0"?>
<robot xmlns:xacro="http://www.ros.org/wiki/xacro">

    <ros2_control name="UnitreeSystem" type="system">

        <hardware>
            <plugin>hardware_unitree_mujoco/HardwareUnitree</plugin>
        </hardware>

        <joint name="FR_hip_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

        <joint name="FR_thigh_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

        <joint name="FR_calf_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

        <joint name="FL_hip_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

        <joint name="FL_thigh_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

        <joint name="FL_calf_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

        <joint name="RR_hip_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

        <joint name="RR_thigh_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

        <joint name="RR_calf_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

        <joint name="RL_hip_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

        <joint name="RL_thigh_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

        <joint name="RL_calf_joint">
            <command_interface name="position"/>
            <command_interface name="velocity"/>
            <command_interface name="effort"/>
            <command_interface name="kp"/>
            <command_interface name="kd"/>

            <state_interface name="position"/>
            <state_interface name="velocity"/>
            <state_interface name="effort"/>
        </joint>

    </ros2_control>

</robot>