diff options
Diffstat (limited to 'src/modules/mavlink/mavlink_rate_limiter.cpp')
-rw-r--r-- | src/modules/mavlink/mavlink_rate_limiter.cpp | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/modules/mavlink/mavlink_rate_limiter.cpp b/src/modules/mavlink/mavlink_rate_limiter.cpp new file mode 100644 index 000000000..9cdda8b17 --- /dev/null +++ b/src/modules/mavlink/mavlink_rate_limiter.cpp @@ -0,0 +1,72 @@ +/**************************************************************************** + * + * Copyright (c) 2014 PX4 Development Team. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * 3. Neither the name PX4 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. + * + ****************************************************************************/ + +/** + * @file mavlink_rate_limiter.cpp + * Message rate limiter implementation. + * + * @author Anton Babushkin <anton.babushkin@me.com> + */ + +#include "mavlink_rate_limiter.h" + +MavlinkRateLimiter::MavlinkRateLimiter() : _last_sent(0), _interval(1000000) +{ +} + +MavlinkRateLimiter::MavlinkRateLimiter(unsigned int interval) : _last_sent(0), _interval(interval) +{ +} + +MavlinkRateLimiter::~MavlinkRateLimiter() +{ +} + +void +MavlinkRateLimiter::set_interval(unsigned int interval) +{ + _interval = interval; +} + +bool +MavlinkRateLimiter::check(hrt_abstime t) +{ + uint64_t dt = t - _last_sent; + + if (dt > 0 && dt >= _interval) { + _last_sent = (t / _interval) * _interval; + return true; + } + + return false; +} |