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https://git.rwth-aachen.de/acs/public/villas/node/
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83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
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/** 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 2017, 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 Signal generation node-type-
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* @{
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*/
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#pragma once
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#include <libconfig.h>
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#include "timing.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 {
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int tfd; /**< timerfd file descriptor. */
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enum {
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TYPE_RANDOM,
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TYPE_SINE,
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TYPE_SQUARE,
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TYPE_TRIANGLE,
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TYPE_RAMP,
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TYPE_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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int 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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int counter; /**< The number of packets already emitted. */
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};
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/** @see node_type::print */
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char * signal_print(struct node *n);
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/** @see node_type::parse */
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int signal_parse(struct node *n, config_setting_t *cfg);
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/** @see node_type::open */
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int signal_open(struct node *n);
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/** @see node_type::close */
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int signal_close(struct node *n);
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/** @see node_type::read */
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int signal_read(struct node *n, struct sample *smps[], unsigned cnt);
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/** @} */
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