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https://git.rwth-aachen.de/acs/public/villas/node/
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100 lines
2.4 KiB
C++
100 lines
2.4 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/node.hpp>
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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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struct Sample;
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class SignalNodeSignal {
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public:
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enum class Type {
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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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PULSE,
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MIXED
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};
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enum Type type;
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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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double
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last; // The values from the previous period which are required for random walk.
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public:
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SignalNodeSignal(json_t *json);
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int parse(json_t *json);
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static enum Type lookupType(const std::string &type);
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static std::string typeToString(enum Type type);
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void start();
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void read(unsigned c, double t, double rate, SignalData *d);
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Signal::Ptr toSignal(Signal::Ptr tpl) const;
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};
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class SignalNode : public Node {
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protected:
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std::vector<SignalNodeSignal> signals;
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struct Task task; // Timer for periodic events.
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int rt; // Real-time mode?
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double rate; // Sampling rate.
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bool
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monitor_missed; // Boolean, if set, node counts missed steps and warns user.
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int limit; // The number of values which should be generated by this node. <0 for infinite.
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struct timespec started; // Point in time when this node was started.
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unsigned missed_steps; // Total number of missed steps.
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virtual int _read(struct Sample *smps[], unsigned cnt);
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public:
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SignalNode(const uuid_t &id = {}, const std::string &name = "");
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virtual const std::string &getDetails();
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virtual int parse(json_t *json);
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virtual int start();
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virtual int stop();
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virtual int prepare();
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virtual std::vector<int> getPollFDs();
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};
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} // namespace node
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} // namespace villas
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