mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-16 00:00:02 +01:00
141 lines
3.4 KiB
C++
141 lines
3.4 KiB
C++
/** Timestamp hook.
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, 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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/** @addtogroup hooks Hook functions
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* @{
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*/
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#include <villas/hook.hpp>
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#include <villas/timing.h>
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#include <villas/sample.h>
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#include <villas/log.h>
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namespace villas {
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namespace node {
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class PpsTsHook : public Hook {
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protected:
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double lastValue;
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double thresh;
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double realSmpRate;
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unsigned idx;
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int lastSeqNr;
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unsigned edgeCounter;
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timespec realTime;
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public:
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PpsTsHook(struct vpath *p, struct vnode *n, int fl, int prio, bool en = true) :
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Hook(p, n, fl, prio, en),
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lastValue(0),
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thresh(1.5),
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realSmpRate(0),
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idx(0),
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lastSeqNr(0),
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edgeCounter(0),
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realTime({ 0, 0 })
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{
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}
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virtual void parse(json_t *cfg)
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{
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int ret;
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json_error_t err;
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assert(state != State::STARTED);
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Hook::parse(cfg);
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ret = json_unpack_ex(cfg, &err, 0, "{ s: i, s?: f }",
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"signal_index", &idx,
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"threshold", &thresh
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);
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if (ret)
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throw ConfigError(cfg, err, "node-config-hook-pps_ts");
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info("parsed config thresh=%f signal_index=%d", thresh, idx);
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state = State::PARSED;
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}
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virtual villas::node::Hook::Reason process(sample *smp)
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{
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assert(state == State::STARTED);
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/* Get value of PPS signal */
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float value = smp->data[idx].f; // TODO check if it is really float
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int seqNr = smp->sequence;
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/* Detect Edge */
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bool isEdge = lastValue < thresh && value > thresh;
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if (isEdge) {
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if (edgeCounter >= 1)
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realSmpRate = seqNr - lastSeqNr;
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if (edgeCounter == 1) {
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auto now = time_now();
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if (now.tv_nsec >= 0.5e9)
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realTime.tv_sec = now.tv_sec + 1;
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else
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realTime.tv_sec = now.tv_sec;
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}
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lastSeqNr = seqNr;
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info("Edge detected: seq=%u, realTime.sec=%ld, realTime.nsec=%ld, smpRate=%f", seqNr, realTime.tv_sec, realTime.tv_nsec, realSmpRate);
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edgeCounter++;
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}
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lastValue = value;
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if (edgeCounter < 2)
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return Hook::Reason::SKIP_SAMPLE;
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else if (edgeCounter == 2 && isEdge)
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realTime.tv_nsec = 0;
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else
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realTime.tv_nsec += 1e9 / realSmpRate;
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if (realTime.tv_nsec >= 1000000000) {
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realTime.tv_sec++;
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realTime.tv_nsec -= 1000000000;
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}
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/* Update timestamp */
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smp->ts.origin = realTime;
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smp->flags |= (int) SampleFlags::HAS_TS_ORIGIN;
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return Hook::Reason::OK;
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}
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};
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/* Register hook */
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static char n[] = "pps_ts";
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static char d[] = "Timestamp samples based GPS PPS signal";
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static HookPlugin<PpsTsHook, n, d, (int) Hook::Flags::NODE_READ | (int) Hook::Flags::NODE_WRITE | (int) Hook::Flags::PATH> p;
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} /* namespace node */
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} /* namespace villas */
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/** @} */
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