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-/*
- * Copyright (C) 2008, Morgan Quigley and Willow Garage, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * * Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * * Neither the names of Stanford University or Willow Garage, Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <px4.h>
-
-using namespace px4;
-
-/**
- * This tutorial demonstrates simple sending of messages over the PX4 middleware system.
- */
-
-namespace px4
-{
-bool task_should_exit = false;
-}
-
-PX4_MAIN_FUNCTION(publisher)
-{
-
- px4::init(argc, argv, "px4_publisher");
-
- px4::NodeHandle n;
-
- /**
- * The advertise() function is how you tell ROS that you want to
- * publish on a given topic name. This invokes a call to the ROS
- * master node, which keeps a registry of who is publishing and who
- * is subscribing. After this advertise() call is made, the master
- * node will notify anyone who is trying to subscribe to this topic name,
- * and they will in turn negotiate a peer-to-peer connection with this
- * node. advertise() returns a Publisher object which allows you to
- * publish messages on that topic through a call to publish(). Once
- * all copies of the returned Publisher object are destroyed, the topic
- * will be automatically unadvertised.
- *
- * The second parameter to advertise() is the size of the message queue
- * used for publishing messages. If messages are published more quickly
- * than we can send them, the number here specifies how many messages to
- * buffer up before throwing some away.
- */
- px4::Publisher * rc_channels_pub = PX4_ADVERTISE(n, rc_channels);
-
-
- px4::Rate loop_rate(10);
-
- /**
- * A count of how many messages we have sent. This is used to create
- * a unique string for each message.
- */
- int count = 0;
-
- while (px4::ok()) {
- /**
- * This is a message object. You stuff it with data, and then publish it.
- */
- PX4_TOPIC_T(rc_channels) msg;
-
- msg.timestamp_last_valid = px4::get_time_micros();
- PX4_INFO("%llu", msg.timestamp_last_valid);
-
- /**
- * The publish() function is how you send messages. The parameter
- * is the message object. The type of this object must agree with the type
- * given as a template parameter to the advertise<>() call, as was done
- * in the constructor above.
- */
- rc_channels_pub->publish(msg);
-
- n.spinOnce();
-
- loop_rate.sleep();
- ++count;
- }
-
- return 0;
-}