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https://git.rwth-aachen.de/acs/public/villas/node/
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79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
/* Node-type for signal generation.
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*
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* Author: Steffen Vogel <post@steffenvogel.de>
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* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <villas/task.hpp>
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#include <villas/timing.hpp>
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namespace villas {
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namespace node {
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// Forward declarations
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class NodeCompat;
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struct Sample;
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struct signal_node {
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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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PULSE
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} *
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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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double *
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pulse_width; // Width of a pulse with respect to the rate (duration = pulse_width/rate)
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double *pulse_low; // Amplitude when pulse signal is off
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double *pulse_high; // Amplitude when pulse signal is on
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double *phase; // Phase (rad) offset with respect to program start
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int monitor_missed; // Boolean, if set, node counts missed steps and warns user.
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double *
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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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char *signal_node_print(NodeCompat *n);
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int signal_node_parse(NodeCompat *n, json_t *json);
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int signal_node_start(NodeCompat *n);
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int signal_node_stop(NodeCompat *n);
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int signal_node_init(NodeCompat *n);
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int signal_node_destroy(NodeCompat *n);
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int signal_node_prepare(NodeCompat *n);
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int signal_node_read(NodeCompat *n, struct Sample *const smps[], unsigned cnt);
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int signal_node_poll_fds(NodeCompat *n, int fds[]);
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} // namespace node
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} // namespace villas
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