[libsigrok.git] / src / hardware / scpi-dmm / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2018 Gerhard Sittig <gerhard.sittig@gmx.net>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <string.h>
#include "protocol.h"

static struct sr_dev_driver scpi_dmm_driver_info;

static const uint32_t scanopts[] = {
	SR_CONF_CONN,
	SR_CONF_SERIALCOMM,
};

static const uint32_t drvopts[] = {
	SR_CONF_MULTIMETER,
};

static const uint32_t devopts_generic[] = {
	SR_CONF_CONTINUOUS,
	SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
	SR_CONF_MEASURED_QUANTITY | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
};

static const struct scpi_command cmdset_agilent[] = {
	{ DMM_CMD_SETUP_REMOTE, "\n", },
	{ DMM_CMD_SETUP_FUNC, "CONF:%s", },
	{ DMM_CMD_QUERY_FUNC, "CONF?", },
	{ DMM_CMD_START_ACQ, "MEAS", },
	{ DMM_CMD_STOP_ACQ, "ABORT", },
	{ DMM_CMD_QUERY_VALUE, "READ?", },
	{ DMM_CMD_QUERY_PREC, "CONF?", },
	ALL_ZERO,
};

/*
 * cmdset_hp is used for the 34401A, which was added to this code after the
 * 34405A and 34465A. It differs in starting the measurement with INIT: using
 * MEAS without a trailing '?' (as used for the 34405A) is not valid for the
 * 34401A and gives an error.
 * I'm surprised the same instruction sequence doesn't work and INIT may
 * work for both, but I don't have the others to re-test.
 *
 * cmdset_hp also works well for the 34410A, using cmdset_agilent throws an
 * error on 'MEAS' without a '?'.
 *
 * On the 34401A,
 *  MEAS <optional parameters> ? configures, arms, triggers and waits
 *       for a reading
 *  CONF <parameters> configures
 *  INIT prepares for triggering (trigger mode is not set, assumed
 *       internal - external might time out)
 *  *OPC waits for completion, and
 *  READ? retrieves the result
 */
static const struct scpi_command cmdset_hp[] = {
	{ DMM_CMD_SETUP_REMOTE, "\n", },
	{ DMM_CMD_SETUP_FUNC, "CONF:%s", },
	{ DMM_CMD_QUERY_FUNC, "CONF?", },
	{ DMM_CMD_START_ACQ, "INIT", },
	{ DMM_CMD_STOP_ACQ, "ABORT", },
	{ DMM_CMD_QUERY_VALUE, "READ?", },
	{ DMM_CMD_QUERY_PREC, "CONF?", },
	ALL_ZERO,
};

static const struct scpi_command cmdset_gwinstek[] = {
	{ DMM_CMD_SETUP_REMOTE, "SYST:REM", },
	{ DMM_CMD_SETUP_LOCAL, "SYST:LOC", },
	{ DMM_CMD_SETUP_FUNC, "CONF:%s", },
	{ DMM_CMD_QUERY_FUNC, "CONF:STAT:FUNC?", },
	{ DMM_CMD_START_ACQ, "*CLS;SYST:REM", },
	{ DMM_CMD_QUERY_VALUE, "VAL1?", },
	{ DMM_CMD_QUERY_PREC, "SENS:DET:RATE?", },
	ALL_ZERO,
};

static const struct scpi_command cmdset_gwinstek_906x[] = {
	{ DMM_CMD_SETUP_REMOTE, "SYST:REM", },
	{ DMM_CMD_SETUP_LOCAL, "SYST:LOC", },
	{ DMM_CMD_SETUP_FUNC, "CONF:%s", },
	{ DMM_CMD_QUERY_FUNC, "CONF?", },
	{ DMM_CMD_START_ACQ, "INIT", },
	{ DMM_CMD_STOP_ACQ, "ABORT", },
	{ DMM_CMD_QUERY_VALUE, "VAL1?", },
	{ DMM_CMD_QUERY_PREC, "SENS:DET:RATE?", },
	ALL_ZERO,
};

static const struct mqopt_item mqopts_agilent_34405a[] = {
	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "VOLT ", NO_DFLT_PREC, },
	{ SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "VOLT:AC ", NO_DFLT_PREC, },
	{ SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "CURR ", NO_DFLT_PREC, },
	{ SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "CURR:AC ", NO_DFLT_PREC, },
	{ SR_MQ_RESISTANCE, 0, "RES", "RES ", NO_DFLT_PREC, },
	{ SR_MQ_CONTINUITY, 0, "CONT", "CONT", -1, },
	{ SR_MQ_CAPACITANCE, 0, "CAP", "CAP ", NO_DFLT_PREC, },
	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC | SR_MQFLAG_DIODE, "DIOD", "DIOD", -4, },
	{ SR_MQ_TEMPERATURE, 0, "TEMP", "TEMP ", NO_DFLT_PREC, },
	{ SR_MQ_FREQUENCY, 0, "FREQ", "FREQ ", NO_DFLT_PREC, },
};

static const struct mqopt_item mqopts_agilent_34401a[] = {
	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "VOLT ", NO_DFLT_PREC, },
	{ SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "VOLT:AC ", NO_DFLT_PREC, },
	{ SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "CURR ", NO_DFLT_PREC, },
	{ SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "CURR:AC ", NO_DFLT_PREC, },
	{ SR_MQ_RESISTANCE, 0, "RES", "RES ", NO_DFLT_PREC, },
	{ SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "FRES ", NO_DFLT_PREC, },
	{ SR_MQ_CONTINUITY, 0, "CONT", "CONT", -1, },
	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC | SR_MQFLAG_DIODE, "DIOD", "DIOD", -4, },
	{ SR_MQ_FREQUENCY, 0, "FREQ", "FREQ ", NO_DFLT_PREC, },
	{ SR_MQ_TIME, 0, "PER", "PER ", NO_DFLT_PREC, },
};

static const struct mqopt_item mqopts_gwinstek_gdm8200a[] = {
	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "01", NO_DFLT_PREC, },
	{ SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "02", NO_DFLT_PREC, },
	{ SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "03", NO_DFLT_PREC, },
	{ SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "04", NO_DFLT_PREC, },
	{ SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "05", NO_DFLT_PREC, }, /* mA */
	{ SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "06", NO_DFLT_PREC, }, /* mA */
	{ SR_MQ_RESISTANCE, 0, "RES", "07", NO_DFLT_PREC, },
	{ SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "16", NO_DFLT_PREC, },
	{ SR_MQ_CONTINUITY, 0, "CONT", "13", -1, },
	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC | SR_MQFLAG_DIODE, "DIOD", "17", -4, },
	{ SR_MQ_TEMPERATURE, 0, "TEMP", "09", NO_DFLT_PREC, }, /* Celsius */
	{ SR_MQ_TEMPERATURE, 0, "TEMP", "15", NO_DFLT_PREC, }, /* Fahrenheit */
	{ SR_MQ_FREQUENCY, 0, "FREQ", "08", NO_DFLT_PREC, },
	{ SR_MQ_TIME, 0, "PER", "14", NO_DFLT_PREC, },
};

static const struct mqopt_item mqopts_gwinstek_gdm906x[] = {
	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "VOLT ", NO_DFLT_PREC, },
	{ SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "VOLT:AC", NO_DFLT_PREC, },
	{ SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "CURR ", NO_DFLT_PREC, },
	{ SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "CURR:AC", NO_DFLT_PREC, },
	{ SR_MQ_RESISTANCE, 0, "RES", "RES", NO_DFLT_PREC, },
	{ SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "FRES", NO_DFLT_PREC, },
	{ SR_MQ_CONTINUITY, 0, "CONT", "CONT", -1, },
	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC | SR_MQFLAG_DIODE, "DIOD", "DIOD", -4, },
	{ SR_MQ_TEMPERATURE, 0, "TEMP", "TEMP", NO_DFLT_PREC, },
	{ SR_MQ_FREQUENCY, 0, "FREQ", "FREQ", NO_DFLT_PREC, },
	{ SR_MQ_TIME, 0, "PER", "PER", NO_DFLT_PREC, },
	{ SR_MQ_CAPACITANCE, 0, "CAP", "CAP", NO_DFLT_PREC, },
};

SR_PRIV const struct scpi_dmm_model models[] = {
	{
		"Agilent", "34405A",
		1, 5, cmdset_agilent, ARRAY_AND_SIZE(mqopts_agilent_34405a),
		scpi_dmm_get_meas_agilent,
		ARRAY_AND_SIZE(devopts_generic),
		0,
	},
	{
		"Agilent", "34410A",
		1, 6, cmdset_hp, ARRAY_AND_SIZE(mqopts_agilent_34405a),
		scpi_dmm_get_meas_agilent,
		ARRAY_AND_SIZE(devopts_generic),
		0,
	},
	{
		"GW", "GDM8251A",
		1, 6, cmdset_gwinstek, ARRAY_AND_SIZE(mqopts_gwinstek_gdm8200a),
		scpi_dmm_get_meas_gwinstek,
		ARRAY_AND_SIZE(devopts_generic),
		1000 * 2500,
	},
	{
		"GW", "GDM8255A",
		1, 6, cmdset_gwinstek, ARRAY_AND_SIZE(mqopts_gwinstek_gdm8200a),
		scpi_dmm_get_meas_gwinstek,
		ARRAY_AND_SIZE(devopts_generic),
		1000 * 2500,
	},
	{
		"GWInstek", "GDM9060",
		1, 6, cmdset_gwinstek_906x, ARRAY_AND_SIZE(mqopts_gwinstek_gdm906x),
		scpi_dmm_get_meas_agilent,
		ARRAY_AND_SIZE(devopts_generic),
		0,
	},
	{
		"GWInstek", "GDM9061",
		1, 6, cmdset_gwinstek_906x, ARRAY_AND_SIZE(mqopts_gwinstek_gdm906x),
		scpi_dmm_get_meas_agilent,
		ARRAY_AND_SIZE(devopts_generic),
		0,
	},
	{
		"HP", "34401A",
		1, 6, cmdset_hp, ARRAY_AND_SIZE(mqopts_agilent_34401a),
		scpi_dmm_get_meas_agilent,
		ARRAY_AND_SIZE(devopts_generic),
		/* 34401A: typ. 1020ms for AC readings (default is 1000ms). */
		1000 * 1500,
	},
	{
		"Keysight", "34465A",
		1, 5, cmdset_agilent, ARRAY_AND_SIZE(mqopts_agilent_34405a),
		scpi_dmm_get_meas_agilent,
		ARRAY_AND_SIZE(devopts_generic),
		0,
	},
};

static const struct scpi_dmm_model *is_compatible(const char *vendor, const char *model)
{
	size_t i;
	const struct scpi_dmm_model *entry;

	for (i = 0; i < ARRAY_SIZE(models); i++) {
		entry = &models[i];
		if (!entry->vendor || !entry->model)
			continue;
		if (strcmp(vendor, entry->vendor) != 0)
			continue;
		if (strcmp(model, entry->model) != 0)
			continue;
		return entry;
	}

	return NULL;
}

static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
{
	struct sr_scpi_hw_info *hw_info;
	int ret;
	const char *vendor;
	const struct scpi_dmm_model *model;
	struct sr_dev_inst *sdi;
	struct dev_context *devc;
	size_t i;
	gchar *channel_name;
	const char *command;

	scpi_dmm_cmd_delay(scpi);
	ret = sr_scpi_get_hw_id(scpi, &hw_info);
	if (ret != SR_OK) {
		sr_info("Could not get IDN response.");
		return NULL;
	}
	vendor = sr_vendor_alias(hw_info->manufacturer);
	model = is_compatible(vendor, hw_info->model);
	if (!model) {
		sr_scpi_hw_info_free(hw_info);
		return NULL;
	}

	sdi = g_malloc0(sizeof(*sdi));
	sdi->vendor = g_strdup(hw_info->manufacturer);
	sdi->model = g_strdup(hw_info->model);
	sdi->version = g_strdup(hw_info->firmware_version);
	sdi->serial_num = g_strdup(hw_info->serial_number);
	sdi->conn = scpi;
	sdi->driver = &scpi_dmm_driver_info;
	sdi->inst_type = SR_INST_SCPI;
	sr_scpi_hw_info_free(hw_info);
	if (model->read_timeout_us)  /* non-default read timeout */
		scpi->read_timeout_us = model->read_timeout_us;
	devc = g_malloc0(sizeof(*devc));
	sdi->priv = devc;
	devc->num_channels = model->num_channels;
	devc->cmdset = model->cmdset;
	devc->model = model;

	for (i = 0; i < devc->num_channels; i++) {
		channel_name = g_strdup_printf("P%zu", i + 1);
		sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, channel_name);
	}

	/*
	 * If device has DMM_CMD_SETUP_LOCAL command, send it now. To avoid
	 * leaving device in remote mode (if only a "scan" is run).
	 */
	command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_SETUP_LOCAL);
	if (command && *command) {
		scpi_dmm_cmd_delay(scpi);
		sr_scpi_send(scpi, command);
	}

	return sdi;
}

static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
	return sr_scpi_scan(di->context, options, probe_device);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	struct sr_scpi_dev_inst *scpi;
	int ret;

	scpi = sdi->conn;
	ret = sr_scpi_open(scpi);
	if (ret < 0) {
		sr_err("Failed to open SCPI device: %s.", sr_strerror(ret));
		return SR_ERR;
	}

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	struct dev_context *devc;
	struct sr_scpi_dev_inst *scpi;
	const char *command;

	devc = sdi->priv;
	scpi = sdi->conn;
	if (!scpi)
		return SR_ERR_BUG;

	sr_dbg("DIAG: sdi->status %d.", sdi->status - SR_ST_NOT_FOUND);
	if (sdi->status <= SR_ST_INACTIVE)
		return SR_OK;

	/*
	 * If device has DMM_CMD_SETUP_LOCAL command, send it now
	 * to avoid leaving device in remote mode.
	 */
	command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_SETUP_LOCAL);
	if (command && *command) {
		scpi_dmm_cmd_delay(scpi);
		sr_scpi_send(scpi, command);
	}

	return sr_scpi_close(scpi);
}

static int config_get(uint32_t key, GVariant **data,
	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	enum sr_mq mq;
	enum sr_mqflag mqflag;
	GVariant *arr[2];
	int ret;

	(void)cg;

	devc = sdi->priv;

	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
	case SR_CONF_LIMIT_MSEC:
		return sr_sw_limits_config_get(&devc->limits, key, data);
	case SR_CONF_MEASURED_QUANTITY:
		ret = scpi_dmm_get_mq(sdi, &mq, &mqflag, NULL, NULL);
		if (ret != SR_OK)
			return ret;
		arr[0] = g_variant_new_uint32(mq);
		arr[1] = g_variant_new_uint64(mqflag);
		*data = g_variant_new_tuple(arr, ARRAY_SIZE(arr));
		return SR_OK;
	default:
		return SR_ERR_NA;
	}
}

static int config_set(uint32_t key, GVariant *data,
	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	enum sr_mq mq;
	enum sr_mqflag mqflag;
	GVariant *tuple_child;

	(void)cg;

	devc = sdi->priv;

	switch (key) {
	case SR_CONF_LIMIT_SAMPLES:
	case SR_CONF_LIMIT_MSEC:
		return sr_sw_limits_config_set(&devc->limits, key, data);
	case SR_CONF_MEASURED_QUANTITY:
		tuple_child = g_variant_get_child_value(data, 0);
		mq = g_variant_get_uint32(tuple_child);
		g_variant_unref(tuple_child);
		tuple_child = g_variant_get_child_value(data, 1);
		mqflag = g_variant_get_uint64(tuple_child);
		g_variant_unref(tuple_child);
		return scpi_dmm_set_mq(sdi, mq, mqflag);
	default:
		return SR_ERR_NA;
	}
}

static int config_list(uint32_t key, GVariant **data,
	const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
	struct dev_context *devc;
	GVariant *gvar, *arr[2];
	GVariantBuilder gvb;
	size_t i;

	(void)cg;

	devc = sdi ? sdi->priv : NULL;

	switch (key) {
	case SR_CONF_SCAN_OPTIONS:
	case SR_CONF_DEVICE_OPTIONS:
		if (!devc)
			return STD_CONFIG_LIST(key, data, sdi, cg,
				scanopts, drvopts, devopts_generic);
		return std_opts_config_list(key, data, sdi, cg,
			ARRAY_AND_SIZE(scanopts), ARRAY_AND_SIZE(drvopts),
			devc->model->devopts, devc->model->devopts_size);
	case SR_CONF_MEASURED_QUANTITY:
		/* TODO Use std_gvar_measured_quantities() when available. */
		if (!devc)
			return SR_ERR_ARG;
		g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
		for (i = 0; i < devc->model->mqopt_size; i++) {
			arr[0] = g_variant_new_uint32(devc->model->mqopts[i].mq);
			arr[1] = g_variant_new_uint64(devc->model->mqopts[i].mqflag);
			gvar = g_variant_new_tuple(arr, ARRAY_SIZE(arr));
			g_variant_builder_add_value(&gvb, gvar);
		}
		*data = g_variant_builder_end(&gvb);
		return SR_OK;
	default:
		(void)devc;
		return SR_ERR_NA;
	}
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
	struct sr_scpi_dev_inst *scpi;
	struct dev_context *devc;
	int ret;
	const struct mqopt_item *item;
	const char *command;
	char *response;

	scpi = sdi->conn;
	devc = sdi->priv;

	ret = scpi_dmm_get_mq(sdi, &devc->start_acq_mq.curr_mq,
		&devc->start_acq_mq.curr_mqflag, NULL, &item);
	if (ret != SR_OK)
		return ret;

	/*
	 * Query for current precision if DMM supports the command
	 */
	command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_QUERY_PREC);
	if (command && *command) {
		scpi_dmm_cmd_delay(scpi);
		ret = sr_scpi_get_string(scpi, command, &response);
		if (ret == SR_OK) {
			g_strstrip(response);
			g_free(devc->precision);
			devc->precision = g_strdup(response);
			g_free(response);
			sr_dbg("%s: Precision: '%s'", __func__, devc->precision);
		} else {
			sr_info("Precision query ('%s') failed: %d",
				command, ret);
		}
	}

	command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_START_ACQ);
	if (command && *command) {
		scpi_dmm_cmd_delay(scpi);
		ret = sr_scpi_send(scpi, command);
		if (ret != SR_OK)
			return ret;
	}

	sr_sw_limits_acquisition_start(&devc->limits);
	ret = std_session_send_df_header(sdi);
	if (ret != SR_OK)
		return ret;

	ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10,
		scpi_dmm_receive_data, (void *)sdi);
	if (ret != SR_OK)
		return ret;

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
	struct sr_scpi_dev_inst *scpi;
	struct dev_context *devc;
	const char *command;

	scpi = sdi->conn;
	devc = sdi->priv;

	command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_STOP_ACQ);
	if (command && *command) {
		scpi_dmm_cmd_delay(scpi);
		(void)sr_scpi_send(scpi, command);
	}
	sr_scpi_source_remove(sdi->session, scpi);

	std_session_send_df_end(sdi);

	g_free(devc->precision);
	devc->precision = NULL;

	return SR_OK;
}

static struct sr_dev_driver scpi_dmm_driver_info = {
	.name = "scpi-dmm",
	.longname = "SCPI DMM",
	.api_version = 1,
	.init = std_init,
	.cleanup = std_cleanup,
	.scan = scan,
	.dev_list = std_dev_list,
	.dev_clear = std_dev_clear,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.context = NULL,
};
SR_REGISTER_DEV_DRIVER(scpi_dmm_driver_info);
Commit	Line	Data
7a396ff5 GS	1	/*
	2	* This file is part of the libsigrok project.
	3	*
	4	* Copyright (C) 2018 Gerhard Sittig <gerhard.sittig@gmx.net>
	5	*
	6	* This program is free software: you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation, either version 3 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
3cdad416	20	#include <string.h>
7a396ff5 GS	21	#include "protocol.h"
7a396ff5 GS	22
0617bb5a GS	23	static struct sr_dev_driver scpi_dmm_driver_info;
0617bb5a GS	24
3cdad416 GS	25	static const uint32_t scanopts[] = {
3cdad416 GS	26	SR_CONF_CONN,
31e65c62	27	SR_CONF_SERIALCOMM,
3cdad416 GS	28	};
	29
	30	static const uint32_t drvopts[] = {
	31	SR_CONF_MULTIMETER,
	32	};
	33
1d2f9963	34	static const uint32_t devopts_generic[] = {
3cdad416 GS	35	SR_CONF_CONTINUOUS,
	36	SR_CONF_LIMIT_SAMPLES \| SR_CONF_GET \| SR_CONF_SET,
	37	SR_CONF_LIMIT_MSEC \| SR_CONF_GET \| SR_CONF_SET,
	38	SR_CONF_MEASURED_QUANTITY \| SR_CONF_GET \| SR_CONF_SET \| SR_CONF_LIST,
	39	};
	40
	41	static const struct scpi_command cmdset_agilent[] = {
	42	{ DMM_CMD_SETUP_REMOTE, "\n", },
	43	{ DMM_CMD_SETUP_FUNC, "CONF:%s", },
	44	{ DMM_CMD_QUERY_FUNC, "CONF?", },
	45	{ DMM_CMD_START_ACQ, "MEAS", },
	46	{ DMM_CMD_STOP_ACQ, "ABORT", },
	47	{ DMM_CMD_QUERY_VALUE, "READ?", },
	48	{ DMM_CMD_QUERY_PREC, "CONF?", },
	49	ALL_ZERO,
	50	};
	51
a1619831	52	/*
1c8110db	53	* cmdset_hp is used for the 34401A, which was added to this code after the
a1619831 AG	54	* 34405A and 34465A. It differs in starting the measurement with INIT: using
a1619831 AG	55	* MEAS without a trailing '?' (as used for the 34405A) is not valid for the
1c8110db FS	56	* 34401A and gives an error.
	57	* I'm surprised the same instruction sequence doesn't work and INIT may
	58	* work for both, but I don't have the others to re-test.
a1619831	59	*
85cff5cf MW	60	* cmdset_hp also works well for the 34410A, using cmdset_agilent throws an
	61	* error on 'MEAS' without a '?'.
	62	*
1c8110db FS	63	* On the 34401A,
1c8110db FS	64	* MEAS <optional parameters> ? configures, arms, triggers and waits
a1619831 AG	65	* for a reading
a1619831 AG	66	* CONF <parameters> configures
1c8110db	67	* INIT prepares for triggering (trigger mode is not set, assumed
a1619831 AG	68	* internal - external might time out)
	69	* *OPC waits for completion, and
	70	* READ? retrieves the result
	71	*/
	72	static const struct scpi_command cmdset_hp[] = {
	73	{ DMM_CMD_SETUP_REMOTE, "\n", },
	74	{ DMM_CMD_SETUP_FUNC, "CONF:%s", },
	75	{ DMM_CMD_QUERY_FUNC, "CONF?", },
	76	{ DMM_CMD_START_ACQ, "INIT", },
	77	{ DMM_CMD_STOP_ACQ, "ABORT", },
	78	{ DMM_CMD_QUERY_VALUE, "READ?", },
	79	{ DMM_CMD_QUERY_PREC, "CONF?", },
	80	ALL_ZERO,
	81	};
	82
d0b602f0 TK	83	static const struct scpi_command cmdset_gwinstek[] = {
d0b602f0 TK	84	{ DMM_CMD_SETUP_REMOTE, "SYST:REM", },
4c80a272	85	{ DMM_CMD_SETUP_LOCAL, "SYST:LOC", },
d0b602f0 TK	86	{ DMM_CMD_SETUP_FUNC, "CONF:%s", },
	87	{ DMM_CMD_QUERY_FUNC, "CONF:STAT:FUNC?", },
	88	{ DMM_CMD_START_ACQ, "*CLS;SYST:REM", },
d0b602f0 TK	89	{ DMM_CMD_QUERY_VALUE, "VAL1?", },
	90	{ DMM_CMD_QUERY_PREC, "SENS:DET:RATE?", },
	91	ALL_ZERO,
	92	};
	93
868fc65e TK	94	static const struct scpi_command cmdset_gwinstek_906x[] = {
868fc65e TK	95	{ DMM_CMD_SETUP_REMOTE, "SYST:REM", },
4c80a272	96	{ DMM_CMD_SETUP_LOCAL, "SYST:LOC", },
868fc65e TK	97	{ DMM_CMD_SETUP_FUNC, "CONF:%s", },
868fc65e TK	98	{ DMM_CMD_QUERY_FUNC, "CONF?", },
860ee00a TK	99	{ DMM_CMD_START_ACQ, "INIT", },
860ee00a TK	100	{ DMM_CMD_STOP_ACQ, "ABORT", },
868fc65e TK	101	{ DMM_CMD_QUERY_VALUE, "VAL1?", },
	102	{ DMM_CMD_QUERY_PREC, "SENS:DET:RATE?", },
	103	ALL_ZERO,
	104	};
	105
64d03de1	106	static const struct mqopt_item mqopts_agilent_34405a[] = {
3cdad416 GS	107	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "VOLT ", NO_DFLT_PREC, },
	108	{ SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "VOLT:AC ", NO_DFLT_PREC, },
	109	{ SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "CURR ", NO_DFLT_PREC, },
	110	{ SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "CURR:AC ", NO_DFLT_PREC, },
	111	{ SR_MQ_RESISTANCE, 0, "RES", "RES ", NO_DFLT_PREC, },
3cdad416 GS	112	{ SR_MQ_CONTINUITY, 0, "CONT", "CONT", -1, },
	113	{ SR_MQ_CAPACITANCE, 0, "CAP", "CAP ", NO_DFLT_PREC, },
	114	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC \| SR_MQFLAG_DIODE, "DIOD", "DIOD", -4, },
	115	{ SR_MQ_TEMPERATURE, 0, "TEMP", "TEMP ", NO_DFLT_PREC, },
	116	{ SR_MQ_FREQUENCY, 0, "FREQ", "FREQ ", NO_DFLT_PREC, },
	117	};
	118
a1619831 AG	119	static const struct mqopt_item mqopts_agilent_34401a[] = {
	120	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "VOLT ", NO_DFLT_PREC, },
	121	{ SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "VOLT:AC ", NO_DFLT_PREC, },
	122	{ SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "CURR ", NO_DFLT_PREC, },
	123	{ SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "CURR:AC ", NO_DFLT_PREC, },
	124	{ SR_MQ_RESISTANCE, 0, "RES", "RES ", NO_DFLT_PREC, },
	125	{ SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "FRES ", NO_DFLT_PREC, },
	126	{ SR_MQ_CONTINUITY, 0, "CONT", "CONT", -1, },
	127	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC \| SR_MQFLAG_DIODE, "DIOD", "DIOD", -4, },
	128	{ SR_MQ_FREQUENCY, 0, "FREQ", "FREQ ", NO_DFLT_PREC, },
	129	{ SR_MQ_TIME, 0, "PER", "PER ", NO_DFLT_PREC, },
	130	};
	131
d0b602f0 TK	132	static const struct mqopt_item mqopts_gwinstek_gdm8200a[] = {
	133	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "01", NO_DFLT_PREC, },
	134	{ SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "02", NO_DFLT_PREC, },
	135	{ SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "03", NO_DFLT_PREC, },
	136	{ SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "04", NO_DFLT_PREC, },
	137	{ SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "05", NO_DFLT_PREC, }, /* mA */
	138	{ SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "06", NO_DFLT_PREC, }, /* mA */
	139	{ SR_MQ_RESISTANCE, 0, "RES", "07", NO_DFLT_PREC, },
	140	{ SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "16", NO_DFLT_PREC, },
	141	{ SR_MQ_CONTINUITY, 0, "CONT", "13", -1, },
	142	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC \| SR_MQFLAG_DIODE, "DIOD", "17", -4, },
	143	{ SR_MQ_TEMPERATURE, 0, "TEMP", "09", NO_DFLT_PREC, }, /* Celsius */
	144	{ SR_MQ_TEMPERATURE, 0, "TEMP", "15", NO_DFLT_PREC, }, /* Fahrenheit */
	145	{ SR_MQ_FREQUENCY, 0, "FREQ", "08", NO_DFLT_PREC, },
	146	{ SR_MQ_TIME, 0, "PER", "14", NO_DFLT_PREC, },
	147	};
	148
868fc65e TK	149	static const struct mqopt_item mqopts_gwinstek_gdm906x[] = {
	150	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "VOLT ", NO_DFLT_PREC, },
	151	{ SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "VOLT:AC", NO_DFLT_PREC, },
	152	{ SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "CURR ", NO_DFLT_PREC, },
	153	{ SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "CURR:AC", NO_DFLT_PREC, },
	154	{ SR_MQ_RESISTANCE, 0, "RES", "RES", NO_DFLT_PREC, },
	155	{ SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "FRES", NO_DFLT_PREC, },
	156	{ SR_MQ_CONTINUITY, 0, "CONT", "CONT", -1, },
	157	{ SR_MQ_VOLTAGE, SR_MQFLAG_DC \| SR_MQFLAG_DIODE, "DIOD", "DIOD", -4, },
	158	{ SR_MQ_TEMPERATURE, 0, "TEMP", "TEMP", NO_DFLT_PREC, },
	159	{ SR_MQ_FREQUENCY, 0, "FREQ", "FREQ", NO_DFLT_PREC, },
	160	{ SR_MQ_TIME, 0, "PER", "PER", NO_DFLT_PREC, },
	161	{ SR_MQ_CAPACITANCE, 0, "CAP", "CAP", NO_DFLT_PREC, },
	162	};
	163
3cdad416 GS	164	SR_PRIV const struct scpi_dmm_model models[] = {
	165	{
	166	"Agilent", "34405A",
64d03de1	167	1, 5, cmdset_agilent, ARRAY_AND_SIZE(mqopts_agilent_34405a),
3cdad416	168	scpi_dmm_get_meas_agilent,
1d2f9963	169	ARRAY_AND_SIZE(devopts_generic),
1c8110db	170	0,
3cdad416	171	},
85cff5cf MW	172	{
	173	"Agilent", "34410A",
	174	1, 6, cmdset_hp, ARRAY_AND_SIZE(mqopts_agilent_34405a),
	175	scpi_dmm_get_meas_agilent,
	176	ARRAY_AND_SIZE(devopts_generic),
	177	0,
	178	},
d0b602f0 TK	179	{
	180	"GW", "GDM8251A",
	181	1, 6, cmdset_gwinstek, ARRAY_AND_SIZE(mqopts_gwinstek_gdm8200a),
	182	scpi_dmm_get_meas_gwinstek,
	183	ARRAY_AND_SIZE(devopts_generic),
	184	1000 * 2500,
	185	},
	186	{
	187	"GW", "GDM8255A",
	188	1, 6, cmdset_gwinstek, ARRAY_AND_SIZE(mqopts_gwinstek_gdm8200a),
	189	scpi_dmm_get_meas_gwinstek,
	190	ARRAY_AND_SIZE(devopts_generic),
	191	1000 * 2500,
	192	},
868fc65e TK	193	{
	194	"GWInstek", "GDM9060",
	195	1, 6, cmdset_gwinstek_906x, ARRAY_AND_SIZE(mqopts_gwinstek_gdm906x),
	196	scpi_dmm_get_meas_agilent,
	197	ARRAY_AND_SIZE(devopts_generic),
	198	0,
	199	},
	200	{
	201	"GWInstek", "GDM9061",
	202	1, 6, cmdset_gwinstek_906x, ARRAY_AND_SIZE(mqopts_gwinstek_gdm906x),
	203	scpi_dmm_get_meas_agilent,
	204	ARRAY_AND_SIZE(devopts_generic),
	205	0,
	206	},
25879a34 GS	207	{
	208	"HP", "34401A",
	209	1, 6, cmdset_hp, ARRAY_AND_SIZE(mqopts_agilent_34401a),
	210	scpi_dmm_get_meas_agilent,
	211	ARRAY_AND_SIZE(devopts_generic),
	212	/* 34401A: typ. 1020ms for AC readings (default is 1000ms). */
	213	1000 * 1500,
	214	},
	215	{
	216	"Keysight", "34465A",
	217	1, 5, cmdset_agilent, ARRAY_AND_SIZE(mqopts_agilent_34405a),
	218	scpi_dmm_get_meas_agilent,
	219	ARRAY_AND_SIZE(devopts_generic),
	220	0,
	221	},
3cdad416 GS	222	};
	223
	224	static const struct scpi_dmm_model is_compatible(const char vendor, const char *model)
7a396ff5	225	{
3cdad416 GS	226	size_t i;
	227	const struct scpi_dmm_model *entry;
	228
	229	for (i = 0; i < ARRAY_SIZE(models); i++) {
	230	entry = &models[i];
	231	if (!entry->vendor \|\| !entry->model)
	232	continue;
	233	if (strcmp(vendor, entry->vendor) != 0)
	234	continue;
	235	if (strcmp(model, entry->model) != 0)
	236	continue;
	237	return entry;
	238	}
7a396ff5	239
3cdad416 GS	240	return NULL;
3cdad416 GS	241	}
7a396ff5	242
3cdad416 GS	243	static struct sr_dev_inst probe_device(struct sr_scpi_dev_inst scpi)
	244	{
	245	struct sr_scpi_hw_info *hw_info;
	246	int ret;
	247	const char *vendor;
	248	const struct scpi_dmm_model *model;
	249	struct sr_dev_inst *sdi;
	250	struct dev_context *devc;
	251	size_t i;
	252	gchar *channel_name;
4c80a272	253	const char *command;
3cdad416	254
3cdad416	255	scpi_dmm_cmd_delay(scpi);
28877994	256	ret = sr_scpi_get_hw_id(scpi, &hw_info);
3cdad416 GS	257	if (ret != SR_OK) {
	258	sr_info("Could not get IDN response.");
	259	return NULL;
	260	}
	261	vendor = sr_vendor_alias(hw_info->manufacturer);
	262	model = is_compatible(vendor, hw_info->model);
	263	if (!model) {
	264	sr_scpi_hw_info_free(hw_info);
	265	return NULL;
	266	}
7a396ff5	267
3cdad416 GS	268	sdi = g_malloc0(sizeof(*sdi));
	269	sdi->vendor = g_strdup(hw_info->manufacturer);
	270	sdi->model = g_strdup(hw_info->model);
	271	sdi->version = g_strdup(hw_info->firmware_version);
	272	sdi->serial_num = g_strdup(hw_info->serial_number);
	273	sdi->conn = scpi;
	274	sdi->driver = &scpi_dmm_driver_info;
	275	sdi->inst_type = SR_INST_SCPI;
	276	sr_scpi_hw_info_free(hw_info);
1c8110db	277	if (model->read_timeout_us) /* non-default read timeout */
a1619831	278	scpi->read_timeout_us = model->read_timeout_us;
3cdad416 GS	279	devc = g_malloc0(sizeof(*devc));
	280	sdi->priv = devc;
	281	devc->num_channels = model->num_channels;
	282	devc->cmdset = model->cmdset;
	283	devc->model = model;
	284
	285	for (i = 0; i < devc->num_channels; i++) {
	286	channel_name = g_strdup_printf("P%zu", i + 1);
	287	sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, channel_name);
	288	}
	289
4c80a272 TK	290	/*
	291	* If device has DMM_CMD_SETUP_LOCAL command, send it now. To avoid
	292	* leaving device in remote mode (if only a "scan" is run).
	293	*/
	294	command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_SETUP_LOCAL);
	295	if (command && *command) {
	296	scpi_dmm_cmd_delay(scpi);
	297	sr_scpi_send(scpi, command);
	298	}
	299
3cdad416 GS	300	return sdi;
3cdad416 GS	301	}
7a396ff5	302
3cdad416 GS	303	static GSList scan(struct sr_dev_driver di, GSList *options)
	304	{
	305	return sr_scpi_scan(di->context, options, probe_device);
7a396ff5 GS	306	}
	307
	308	static int dev_open(struct sr_dev_inst *sdi)
	309	{
3cdad416 GS	310	struct sr_scpi_dev_inst *scpi;
3cdad416 GS	311	int ret;
7a396ff5	312
3cdad416 GS	313	scpi = sdi->conn;
	314	ret = sr_scpi_open(scpi);
	315	if (ret < 0) {
	316	sr_err("Failed to open SCPI device: %s.", sr_strerror(ret));
	317	return SR_ERR;
	318	}
7a396ff5 GS	319
	320	return SR_OK;
	321	}
	322
	323	static int dev_close(struct sr_dev_inst *sdi)
	324	{
4c80a272	325	struct dev_context *devc;
3cdad416	326	struct sr_scpi_dev_inst *scpi;
4c80a272	327	const char *command;
7a396ff5	328
4c80a272	329	devc = sdi->priv;
3cdad416 GS	330	scpi = sdi->conn;
	331	if (!scpi)
	332	return SR_ERR_BUG;
7a396ff5	333
3cdad416 GS	334	sr_dbg("DIAG: sdi->status %d.", sdi->status - SR_ST_NOT_FOUND);
	335	if (sdi->status <= SR_ST_INACTIVE)
	336	return SR_OK;
	337
4c80a272 TK	338	/*
	339	* If device has DMM_CMD_SETUP_LOCAL command, send it now
	340	* to avoid leaving device in remote mode.
	341	*/
	342	command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_SETUP_LOCAL);
	343	if (command && *command) {
	344	scpi_dmm_cmd_delay(scpi);
	345	sr_scpi_send(scpi, command);
	346	}
	347
3cdad416	348	return sr_scpi_close(scpi);
7a396ff5 GS	349	}
	350
	351	static int config_get(uint32_t key, GVariant **data,
	352	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	353	{
3cdad416 GS	354	struct dev_context *devc;
	355	enum sr_mq mq;
	356	enum sr_mqflag mqflag;
	357	GVariant *arr[2];
7a396ff5 GS	358	int ret;
7a396ff5 GS	359
7a396ff5 GS	360	(void)cg;
7a396ff5 GS	361
3cdad416 GS	362	devc = sdi->priv;
3cdad416 GS	363
7a396ff5	364	switch (key) {
3cdad416 GS	365	case SR_CONF_LIMIT_SAMPLES:
	366	case SR_CONF_LIMIT_MSEC:
	367	return sr_sw_limits_config_get(&devc->limits, key, data);
	368	case SR_CONF_MEASURED_QUANTITY:
08f3b427	369	ret = scpi_dmm_get_mq(sdi, &mq, &mqflag, NULL, NULL);
3cdad416 GS	370	if (ret != SR_OK)
	371	return ret;
	372	arr[0] = g_variant_new_uint32(mq);
	373	arr[1] = g_variant_new_uint64(mqflag);
	374	*data = g_variant_new_tuple(arr, ARRAY_SIZE(arr));
	375	return SR_OK;
7a396ff5 GS	376	default:
	377	return SR_ERR_NA;
	378	}
7a396ff5 GS	379	}
	380
	381	static int config_set(uint32_t key, GVariant *data,
	382	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	383	{
3cdad416 GS	384	struct dev_context *devc;
	385	enum sr_mq mq;
	386	enum sr_mqflag mqflag;
	387	GVariant *tuple_child;
7a396ff5	388
7a396ff5 GS	389	(void)cg;
7a396ff5 GS	390
3cdad416 GS	391	devc = sdi->priv;
3cdad416 GS	392
7a396ff5	393	switch (key) {
3cdad416 GS	394	case SR_CONF_LIMIT_SAMPLES:
	395	case SR_CONF_LIMIT_MSEC:
	396	return sr_sw_limits_config_set(&devc->limits, key, data);
	397	case SR_CONF_MEASURED_QUANTITY:
	398	tuple_child = g_variant_get_child_value(data, 0);
	399	mq = g_variant_get_uint32(tuple_child);
ff5fb185	400	g_variant_unref(tuple_child);
3cdad416 GS	401	tuple_child = g_variant_get_child_value(data, 1);
	402	mqflag = g_variant_get_uint64(tuple_child);
	403	g_variant_unref(tuple_child);
	404	return scpi_dmm_set_mq(sdi, mq, mqflag);
7a396ff5	405	default:
3cdad416	406	return SR_ERR_NA;
7a396ff5	407	}
7a396ff5 GS	408	}
	409
	410	static int config_list(uint32_t key, GVariant **data,
	411	const struct sr_dev_inst sdi, const struct sr_channel_group cg)
	412	{
3cdad416 GS	413	struct dev_context *devc;
	414	GVariant gvar, arr[2];
	415	GVariantBuilder gvb;
	416	size_t i;
7a396ff5	417
7a396ff5 GS	418	(void)cg;
7a396ff5 GS	419
3cdad416 GS	420	devc = sdi ? sdi->priv : NULL;
3cdad416 GS	421
7a396ff5	422	switch (key) {
3cdad416 GS	423	case SR_CONF_SCAN_OPTIONS:
3cdad416 GS	424	case SR_CONF_DEVICE_OPTIONS:
1d2f9963 GS	425	if (!devc)
	426	return STD_CONFIG_LIST(key, data, sdi, cg,
	427	scanopts, drvopts, devopts_generic);
	428	return std_opts_config_list(key, data, sdi, cg,
	429	ARRAY_AND_SIZE(scanopts), ARRAY_AND_SIZE(drvopts),
	430	devc->model->devopts, devc->model->devopts_size);
3cdad416 GS	431	case SR_CONF_MEASURED_QUANTITY:
	432	/* TODO Use std_gvar_measured_quantities() when available. */
	433	if (!devc)
	434	return SR_ERR_ARG;
	435	g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
	436	for (i = 0; i < devc->model->mqopt_size; i++) {
	437	arr[0] = g_variant_new_uint32(devc->model->mqopts[i].mq);
	438	arr[1] = g_variant_new_uint64(devc->model->mqopts[i].mqflag);
	439	gvar = g_variant_new_tuple(arr, ARRAY_SIZE(arr));
	440	g_variant_builder_add_value(&gvb, gvar);
	441	}
	442	*data = g_variant_builder_end(&gvb);
	443	return SR_OK;
7a396ff5	444	default:
3cdad416	445	(void)devc;
7a396ff5 GS	446	return SR_ERR_NA;
7a396ff5 GS	447	}
7a396ff5 GS	448	}
	449
	450	static int dev_acquisition_start(const struct sr_dev_inst *sdi)
	451	{
3cdad416 GS	452	struct sr_scpi_dev_inst *scpi;
	453	struct dev_context *devc;
	454	int ret;
08f3b427	455	const struct mqopt_item *item;
3cdad416	456	const char *command;
d0b602f0	457	char *response;
3cdad416 GS	458
	459	scpi = sdi->conn;
	460	devc = sdi->priv;
	461
	462	ret = scpi_dmm_get_mq(sdi, &devc->start_acq_mq.curr_mq,
08f3b427	463	&devc->start_acq_mq.curr_mqflag, NULL, &item);
3cdad416 GS	464	if (ret != SR_OK)
	465	return ret;
	466
d0b602f0 TK	467	/*
	468	* Query for current precision if DMM supports the command
	469	*/
	470	command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_QUERY_PREC);
	471	if (command && *command) {
	472	scpi_dmm_cmd_delay(scpi);
	473	ret = sr_scpi_get_string(scpi, command, &response);
	474	if (ret == SR_OK) {
	475	g_strstrip(response);
33aa8117 GS	476	g_free(devc->precision);
33aa8117 GS	477	devc->precision = g_strdup(response);
d0b602f0 TK	478	g_free(response);
	479	sr_dbg("%s: Precision: '%s'", __func__, devc->precision);
	480	} else {
33aa8117 GS	481	sr_info("Precision query ('%s') failed: %d",
33aa8117 GS	482	command, ret);
d0b602f0 TK	483	}
	484	}
	485
3cdad416 GS	486	command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_START_ACQ);
3cdad416 GS	487	if (command && *command) {
3cdad416	488	scpi_dmm_cmd_delay(scpi);
28877994	489	ret = sr_scpi_send(scpi, command);
3cdad416 GS	490	if (ret != SR_OK)
	491	return ret;
	492	}
7a396ff5	493
3cdad416 GS	494	sr_sw_limits_acquisition_start(&devc->limits);
	495	ret = std_session_send_df_header(sdi);
	496	if (ret != SR_OK)
	497	return ret;
	498
	499	ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10,
	500	scpi_dmm_receive_data, (void *)sdi);
	501	if (ret != SR_OK)
	502	return ret;
7a396ff5 GS	503
	504	return SR_OK;
	505	}
	506
	507	static int dev_acquisition_stop(struct sr_dev_inst *sdi)
	508	{
3cdad416 GS	509	struct sr_scpi_dev_inst *scpi;
	510	struct dev_context *devc;
	511	const char *command;
	512
	513	scpi = sdi->conn;
	514	devc = sdi->priv;
7a396ff5	515
3cdad416 GS	516	command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_STOP_ACQ);
3cdad416 GS	517	if (command && *command) {
3cdad416	518	scpi_dmm_cmd_delay(scpi);
28877994	519	(void)sr_scpi_send(scpi, command);
3cdad416 GS	520	}
	521	sr_scpi_source_remove(sdi->session, scpi);
	522
	523	std_session_send_df_end(sdi);
7a396ff5	524
33aa8117 GS	525	g_free(devc->precision);
33aa8117 GS	526	devc->precision = NULL;
d0b602f0	527
7a396ff5 GS	528	return SR_OK;
	529	}
	530
0617bb5a	531	static struct sr_dev_driver scpi_dmm_driver_info = {
7a396ff5 GS	532	.name = "scpi-dmm",
	533	.longname = "SCPI DMM",
	534	.api_version = 1,
	535	.init = std_init,
	536	.cleanup = std_cleanup,
	537	.scan = scan,
	538	.dev_list = std_dev_list,
	539	.dev_clear = std_dev_clear,
	540	.config_get = config_get,
	541	.config_set = config_set,
	542	.config_list = config_list,
	543	.dev_open = dev_open,
	544	.dev_close = dev_close,
	545	.dev_acquisition_start = dev_acquisition_start,
	546	.dev_acquisition_stop = dev_acquisition_stop,
	547	.context = NULL,
	548	};
7a396ff5	549	SR_REGISTER_DEV_DRIVER(scpi_dmm_driver_info);