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https://git.rwth-aachen.de/acs/public/villas/node/
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89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/** Node-type for signal generation.
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2019, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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/**
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* @ingroup node
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* @addtogroup signal_generator Signal generation node-type-
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* @{
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*/
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#pragma once
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#include <villas/timing.h>
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#include <villas/task.h>
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/* Forward declarations */
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struct node;
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struct sample;
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/** Node-type for signal generation.
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* @see node_type
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*/
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struct signal_generator {
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struct task task; /**< Timer for periodic events. */
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int rt; /**< Real-time mode? */
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enum class SignalType {
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RANDOM,
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SINE,
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SQUARE,
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TRIANGLE,
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RAMP,
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COUNTER,
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CONSTANT,
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MIXED
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} type; /**< Signal type */
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double rate; /**< Sampling rate. */
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double frequency; /**< Frequency of the generated signals. */
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double amplitude; /**< Amplitude of the generated signals. */
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double stddev; /**< Standard deviation of random signals (normal distributed). */
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double offset; /**< A constant bias. */
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int monitor_missed; /**< Boolean, if set, node counts missed steps and warns user. */
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double *last; /**< The values from the previous period which are required for random walk. */
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unsigned values; /**< The number of values which will be emitted by this node. */
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int limit; /**< The number of values which should be generated by this node. <0 for infinitve. */
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struct timespec started; /**< Point in time when this node was started. */
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unsigned counter; /**< The number of packets already emitted. */
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unsigned missed_steps; /**< Total number of missed steps. */
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};
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/** @see node_type::print */
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char * signal_generator_print(struct node *n);
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/** @see node_type::parse */
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int signal_generator_parse(struct node *n, json_t *cfg);
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/** @see node_type::start */
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int signal_generator_start(struct node *n);
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/** @see node_type::stop */
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int signal_generator_stop(struct node *n);
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/** @see node_type::read */
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int signal_generator_read(struct node *n, struct sample *smps[], unsigned cnt, unsigned *release);
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/** @} */
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