144 lines
4.2 KiB
C
144 lines
4.2 KiB
C
/*
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* This file is part of the libsigrok project.
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*
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* Copyright (C) 2014 Bert Vermeulen <bert@biot.com>
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* Copyright (C) 2019 Frank Stettner <frank-stettner@gmx.net>
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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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* (at your option) 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 <config.h>
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#include <string.h>
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#include <strings.h>
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#include <stdarg.h>
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#include "scpi.h"
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#include "protocol.h"
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SR_PRIV int scpi_pps_receive_data(int fd, int revents, void *cb_data)
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{
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struct dev_context *devc;
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const struct scpi_pps *device;
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struct sr_datafeed_packet packet;
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struct sr_datafeed_analog analog;
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struct sr_analog_encoding encoding;
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struct sr_analog_meaning meaning;
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struct sr_analog_spec spec;
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struct sr_dev_inst *sdi;
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int channel_group_cmd;
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const char *channel_group_name;
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struct pps_channel *pch;
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const struct channel_spec *ch_spec;
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int ret;
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float f;
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GVariant *gvdata;
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const GVariantType *gvtype;
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int cmd;
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(void)fd;
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(void)revents;
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if (!(sdi = cb_data))
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return TRUE;
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if (!(devc = sdi->priv))
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return TRUE;
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if (!(device = devc->device))
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return TRUE;
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pch = devc->cur_acquisition_channel->priv;
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channel_group_cmd = 0;
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channel_group_name = NULL;
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if (g_slist_length(sdi->channel_groups) > 1) {
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channel_group_cmd = SCPI_CMD_SELECT_CHANNEL;
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channel_group_name = pch->hwname;
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}
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/*
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* When the current channel is the first in the array, perform the device
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* specific status update first.
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*/
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if (devc->cur_acquisition_channel == sr_next_enabled_channel(sdi, NULL) &&
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device->update_status) {
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device->update_status(sdi);
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}
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if (pch->mq == SR_MQ_VOLTAGE) {
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gvtype = G_VARIANT_TYPE_DOUBLE;
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cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
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} else if (pch->mq == SR_MQ_FREQUENCY) {
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gvtype = G_VARIANT_TYPE_DOUBLE;
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cmd = SCPI_CMD_GET_MEAS_FREQUENCY;
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} else if (pch->mq == SR_MQ_CURRENT) {
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gvtype = G_VARIANT_TYPE_DOUBLE;
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cmd = SCPI_CMD_GET_MEAS_CURRENT;
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} else if (pch->mq == SR_MQ_POWER) {
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gvtype = G_VARIANT_TYPE_DOUBLE;
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cmd = SCPI_CMD_GET_MEAS_POWER;
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} else {
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return SR_ERR;
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}
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ret = sr_scpi_cmd_resp(sdi, devc->device->commands,
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channel_group_cmd, channel_group_name, &gvdata, gvtype, cmd);
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if (ret != SR_OK)
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return ret;
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ch_spec = &devc->device->channels[pch->hw_output_idx];
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packet.type = SR_DF_ANALOG;
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packet.payload = &analog;
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/* Note: digits/spec_digits will be overridden later. */
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sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
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analog.meaning->channels = g_slist_append(NULL, devc->cur_acquisition_channel);
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analog.num_samples = 1;
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analog.meaning->mq = pch->mq;
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if (pch->mq == SR_MQ_VOLTAGE) {
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analog.meaning->unit = SR_UNIT_VOLT;
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analog.encoding->digits = ch_spec->voltage[4];
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analog.spec->spec_digits = ch_spec->voltage[3];
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} else if (pch->mq == SR_MQ_CURRENT) {
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analog.meaning->unit = SR_UNIT_AMPERE;
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analog.encoding->digits = ch_spec->current[4];
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analog.spec->spec_digits = ch_spec->current[3];
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} else if (pch->mq == SR_MQ_POWER) {
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analog.meaning->unit = SR_UNIT_WATT;
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analog.encoding->digits = ch_spec->power[4];
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analog.spec->spec_digits = ch_spec->power[3];
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}
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analog.meaning->mqflags = SR_MQFLAG_DC;
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f = (float)g_variant_get_double(gvdata);
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g_variant_unref(gvdata);
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analog.data = &f;
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sr_session_send(sdi, &packet);
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g_slist_free(analog.meaning->channels);
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/* Next channel. */
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if (g_slist_length(sdi->channels) > 1) {
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devc->cur_acquisition_channel =
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sr_next_enabled_channel(sdi, devc->cur_acquisition_channel);
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}
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if (devc->cur_acquisition_channel == sr_next_enabled_channel(sdi, NULL))
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/* First enabled channel, so each channel has been sampled */
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sr_sw_limits_update_samples_read(&devc->limits, 1);
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/* Stop if limits have been hit. */
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if (sr_sw_limits_check(&devc->limits))
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sr_dev_acquisition_stop(sdi);
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return TRUE;
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}
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