/* Node-type for signal generation. * * Author: Steffen Vogel * SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University * SPDX-License-Identifier: Apache-2.0 */ #pragma once #include #include namespace villas { namespace node { // Forward declarations class NodeCompat; struct Sample; struct signal_node { struct Task task; // Timer for periodic events. int rt; // Real-time mode? enum class SignalType { RANDOM, SINE, SQUARE, TRIANGLE, RAMP, COUNTER, CONSTANT, MIXED, PULSE } * type; // Signal type double rate; // Sampling rate. double *frequency; // Frequency of the generated signals. double *amplitude; // Amplitude of the generated signals. double *stddev; // Standard deviation of random signals (normal distributed). double *offset; // A constant bias. double * pulse_width; // Width of a pulse with respect to the rate (duration = pulse_width/rate) double *pulse_low; // Amplitude when pulse signal is off double *pulse_high; // Amplitude when pulse signal is on double *phase; // Phase (rad) offset with respect to program start int monitor_missed; // Boolean, if set, node counts missed steps and warns user. double * last; // The values from the previous period which are required for random walk. unsigned values; // The number of values which will be emitted by this node. int limit; // The number of values which should be generated by this node. <0 for infinitve. struct timespec started; // Point in time when this node was started. unsigned counter; // The number of packets already emitted. unsigned missed_steps; // Total number of missed steps. }; char *signal_node_print(NodeCompat *n); int signal_node_parse(NodeCompat *n, json_t *json); int signal_node_start(NodeCompat *n); int signal_node_stop(NodeCompat *n); int signal_node_init(NodeCompat *n); int signal_node_destroy(NodeCompat *n); int signal_node_prepare(NodeCompat *n); int signal_node_read(NodeCompat *n, struct Sample *const smps[], unsigned cnt); int signal_node_poll_fds(NodeCompat *n, int fds[]); } // namespace node } // namespace villas