mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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268 lines
8.3 KiB
C
268 lines
8.3 KiB
C
/** Node-type for uldaq connections.
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*
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* @file
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* @author Manuel Pitz <manuel.pitz@eonerc.rwth-aachen.de>
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2017-2018, 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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#include <villas/node.h>
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#include <villas/plugin.h>
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#include <villas/config.h>
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#include <villas/nodes/loopback.h>
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#include <villas/memory.h>
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static const struct {
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const char *name,
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Range range
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} ranges[] {
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{ "bipolar-60", BIP60VOLTS }, // -60 to +60 Volts
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{ "bipolar-30", BIP30VOLTS }, // -30 to +30 Volts
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{ "bipolar-15", BIP15VOLTS }, // -15 to +15 Volts
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{ "bipolar-20", BIP20VOLTS }, // -20 to +20 Volts
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{ "bipolar-10", BIP10VOLTS }, // -10 to +10 Volts
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{ "bipolar-5", BIP5VOLTS }, // -5 to +5 Volts
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{ "bipolar-4", BIP4VOLTS }, // -4 to +4 Volts
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{ "bipolar-2.5", BIP2PT5VOLTS }, // -2.5 to +2.5 Volts
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{ "bipolar-2", BIP2VOLTS }, // -2 to +2.0 Volts
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{ "bipolar-1.25", BIP1PT25VOLTS }, // -1.25 to +1.25 Volts
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{ "bipolar-1", BIP1VOLTS }, // -1 to +1 Volts
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{ "bipolar-0.625", BIPPT625VOLTS }, // -0.625 to +.625 Volts
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{ "bipolar-0.5", BIPPT5VOLTS }, // -0.5 to +.5 Volts
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{ "bipolar-0.25", BIPPT25VOLTS }, // -0.25 to +0.25 Volts
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{ "bipolar-0.125", BIPPT125VOLTS }, // -0.125 to +0.125 Volts
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{ "bipolar-0.2", BIPPT2VOLTS }, // -0.2 to +0.2 Volts
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{ "bipolar-0.1", BIPPT1VOLTS }, // -0.1 to +.1 Volts
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{ "bipolar-0.078", BIPPT078VOLTS }, // -0.078 to +0.078 Volts
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{ "bipolar-0.05", BIPPT05VOLTS }, // -0.05 to +.05 Volts
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{ "bipolar-0.01", BIPPT01VOLTS }, // -0.01 to +.01 Volts
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{ "bipolar-0.005", BIPPT005VOLTS }, // -0.005 to +.005 Volts
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{ "unipolar-60", UNI60VOLTS }, // 0.0 to +60 Volts
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{ "unipolar-30", UNI30VOLTS }, // 0.0 to +30 Volts
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{ "unipolar-15", UNI15VOLTS }, // 0.0 to +15 Volts
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{ "unipolar-20", UNI20VOLTS }, // 0.0 to +20 Volts
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{ "unipolar-10", UNI10VOLTS }, // 0.0 to +10 Volts
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{ "unipolar-5", UNI5VOLTS }, // 0.0 to +5 Volts
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{ "unipolar-4", UNI4VOLTS }, // 0.0 to +4 Volts
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{ "unipolar-2.5", UNI2PT5VOLTS }, // 0.0 to +2.5 Volts
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{ "unipolar-2", UNI2VOLTS }, // 0.0 to +2.0 Volts
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{ "unipolar-1.25", UNI1PT25VOLTS }, // 0.0 to +1.25 Volts
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{ "unipolar-1", UNI1VOLTS }, // 0.0 to +1 Volts
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{ "unipolar-0.625", UNIPT625VOLTS }, // 0.0 to +.625 Volts
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{ "unipolar-0.5", UNIPT5VOLTS }, // 0.0 to +.5 Volts
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{ "unipolar-0.25", UNIPT25VOLTS }, // 0.0 to +0.25 Volts
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{ "unipolar-0.125", UNIPT125VOLTS }, // 0.0 to +0.125 Volts
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{ "unipolar-0.2", UNIPT2VOLTS }, // 0.0 to +0.2 Volts
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{ "unipolar-0.1", UNIPT1VOLTS }, // 0.0 to +.1 Volts
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{ "unipolar-0.078", UNIPT078VOLTS }, // 0.0 to +0.078 Volts
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{ "unipolar-0.05", UNIPT05VOLTS }, // 0.0 to +.05 Volts
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{ "unipolar-0.01", UNIPT01VOLTS }, // 0.0 to +.01 Volts
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{ "unipolar-0.005", UNIPT005VOLTS } // 0.0 to +.005 Volts
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};
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static Range uldaq_parse_range(const char *str)
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{
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for (int i = 0; i < ARRAY_LEN(ranges); i++) {
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if (!strcmp(ranges[i].name, str))
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return ranges[i].range;
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}
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return -1;
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}
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int uldaq_init(struct node *n)
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{
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struct uldaq *u = (struct uldaq *) n->_vd;
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u->in.queue_len = 0;
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u->in.queues = NULL;
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u->in.sample_count = 10000;
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u->in.sample_rate = 1000;
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u->in.scan_options = (ScanOption) (SO_DEFAULTIO | SO_CONTINUOUS);
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u->in.flags = AINSCAN_FF_DEFAULT;
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}
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int uldaq_parse(struct node *n, json_t *cfg)
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{
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int ret;
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struct uldaq *u = (struct uldaq *) n->_vd;
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const char *range = NULL;
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size_t i;
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json_t *json_signals;
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json_t *json_signal;
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ret = json_unpack_ex(cfg, &err, 0, "{ s: { s: o, s: i, s: d } }",
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"in",
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"signals", &json_signals,
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"sample_count", &u->in.sample_count,
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"sample_rate", &u->in.sample_rate,
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"range", &range
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);
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if (ret)
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jerror(&err, "Failed to parse configuration of node %s", node_name(n));
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u->in.queue_len = list_length(&n->in.signals);
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u->in.queues = realloc(sizeof(struct AiQueueElement) * u->in.queue_len);
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json_array_foreach(json_signals, i, json_signal) {
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}
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}
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int uldaq_start(struct node *n)
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{
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int ret;
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struct uldaq *u = (struct uldaq *) n->_vd;
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Range ranges[MAX_RANGE_COUNT];
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int numRanges = 0;
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int descriptorIndex = 0;
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unsigned int numDevs = 1;
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UlError err = ERR_NO_ERROR;
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AiInputMode u->inputMode = AI_SINGLE_ENDED;
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int chanCount = 1;//change this to use more than one channel
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int index = 0;
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// allocate a buffer to receive the data
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double *buffer = (double *) alloc(chanCount * u->sample_count * sizeof(double));
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if (buffer == 0) {
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warn("Out of memory, unable to create scan buffer");
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ret = -1;
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}
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// Get descriptors for all of the available DAQ devices
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err = ulGetDaqDeviceInventory(u->interfaceType, u->devDescriptors, &numDevs);
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if (err != ERR_NO_ERROR)
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ret = -1;
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// verify at least one DAQ device is detected
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if (numDevs == 0) {
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warn("No DAQ devices are connected");
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ret = -1;
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}
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// get a handle to the DAQ device associated with the first descriptor
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u->daqDeviceHandle = ulCreateDaqDevice(u->devDescriptors[0]);
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if (u->daqDeviceHandle == 0) {
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warn ("Unable to create a handle to the specified DAQ device");
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ret = -1;
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}
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// get the analog input ranges
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err = getAiInfoRanges(u->daqDeviceHandle, u->inputMode, &numRanges, ranges);
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if (err != ERR_NO_ERROR)
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ret = -1;
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err = ulConnectDaqDevice(u->daqDeviceHandle);
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if (err != ERR_NO_ERROR)
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ret = -1;
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err = ulAInLoadQueue(u->daqDeviceHandle, u->queues, chanCount);
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if (err != ERR_NO_ERROR)
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ret = -1;
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Range range; // will be ignored when in queue mode
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int lowChan,highChan; // will be ignored when in queue mode
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// start the acquisition
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//
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// when using the queue, the lowChan, highChan, u->inputMode, and range
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// parameters are ignored since they are specified in u->queues
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err = ulAInScan(u->daqDeviceHandle, lowChan, highChan, u->inputMode, range, u->sample_count, &(u->sample_rate), u->scanOptions, u->flags, buffer);
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if (err == ERR_NO_ERROR) {
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ScanStatus status;
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TransferStatus transferStatus;
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// get the initial status of the acquisition
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ulAInScanStatus(u->daqDeviceHandle, &status, &transferStatus);
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}
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if (ret)
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return ret;
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return queue_signalled_init(&l->queue, l->queuelen, &memory_hugepage, QUEUE_SIGNALLED_EVENTFD);
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}
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int uldaq_stop(struct node *n)
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{
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int ret;
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struct uldaq *u = (struct uldaq *) n->_vd;
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// get the current status of the acquisition
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err = ulAInScanStatus(u->daqDeviceHandle, &status, &transferStatus);
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UlError err = ERR_NO_ERROR;
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// stop the acquisition if it is still running
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if (status == SS_RUNNING && err == ERR_NO_ERROR)
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ulAInScanStop(u->daqDeviceHandle);
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// TODO: error handling
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ulDisconnectDaqDevice(u->daqDeviceHandle);
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ulReleaseDaqDevice(u->daqDeviceHandle);
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return queue_signalled_destroy(&l->queue);
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}
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int uldaq_read(struct node *n, struct sample *smps[], unsigned cnt, unsigned *release)
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{
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int avail;
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struct uldaq *u = (struct uldaq *) n->_vd;
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UlError err = ERR_NO_ERROR;
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if (status == SS_RUNNING && err == ERR_NO_ERROR) {
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// get the current status of the acquisition
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err = ulAInScanStatus(u->daqDeviceHandle, &status, &transferStatus);
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if (err == ERR_NO_ERROR) {
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index = transferStatus.currentIndex;
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int i=0;//we only read one channel
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double currentVal = buffer[index + i];
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}
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}
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return avail;
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}
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static struct plugin p = {
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.name = "uldaq",
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.description = "Read USB analog to digital converters like UL201",
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.type = PLUGIN_TYPE_NODE,
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.node = {
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.vectorize = 0,
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.u->flags = NODE_TYPE_PROVIDES_SIGNALS,
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.size = sizeof(struct uldaq),
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.parse = loopback_parse,
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.print = loopback_print,
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.start = uldaq_start,
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.stop = uldaq_stop,
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.read = uldaq_read
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}
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};
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REGISTER_PLUGIN(&p)
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LIST_INIT_STATIC(&p.node.instances)
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