src/hardware/scpi-dmm/api.c

   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
  20 #include <string.h>
  21 #include "protocol.h"
  22
  23 static struct sr_dev_driver scpi_dmm_driver_info;
  24
  25 static const uint32_t scanopts[] = {
  26         SR_CONF_CONN,
  27         SR_CONF_SERIALCOMM,
  28 };
  29
  30 static const uint32_t drvopts[] = {
  31         SR_CONF_MULTIMETER,
  32 };
  33
  34 static const uint32_t devopts_generic[] = {
  35         SR_CONF_CONTINUOUS,
  36         SR_CONF_CONN | SR_CONF_GET,
  37         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  38         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  39         SR_CONF_MEASURED_QUANTITY | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  40 };
  41
  42 static const uint32_t devopts_generic_range[] = {
  43         SR_CONF_CONTINUOUS,
  44         SR_CONF_CONN | SR_CONF_GET,
  45         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  46         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  47         SR_CONF_MEASURED_QUANTITY | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  48         SR_CONF_RANGE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  49 };
  50
  51 static const struct scpi_command cmdset_agilent[] = {
  52         { DMM_CMD_SETUP_REMOTE, "\n", },
  53         { DMM_CMD_SETUP_LOCAL, "SYST:LOC", },
  54         { DMM_CMD_SETUP_FUNC, "CONF:%s", },
  55         { DMM_CMD_QUERY_FUNC, "CONF?", },
  56         { DMM_CMD_START_ACQ, "INIT", },
  57         { DMM_CMD_STOP_ACQ, "ABORT", },
  58         { DMM_CMD_QUERY_VALUE, "FETCH?", },
  59         { DMM_CMD_QUERY_PREC, "CONF?", },
  60         { DMM_CMD_QUERY_RANGE_AUTO, "%s:RANGE:AUTO?", },
  61         { DMM_CMD_QUERY_RANGE, "%s:RANGE?", },
  62         { DMM_CMD_SETUP_RANGE, "CONF:%s %s", },
  63         ALL_ZERO,
  64 };
  65
  66 /*
  67  * cmdset_hp is used for the 34401A, which was added to this code after the
  68  * 34405A and 34465A. It differs in starting the measurement with INIT: using
  69  * MEAS without a trailing '?' (as used for the 34405A) is not valid for the
  70  * 34401A and gives an error.
  71  * I'm surprised the same instruction sequence doesn't work and INIT may
  72  * work for both, but I don't have the others to re-test.
  73  *
  74  * cmdset_hp also works well for the 34410A, using cmdset_agilent throws an
  75  * error on 'MEAS' without a '?'.
  76  *
  77  * On the 34401A,
  78  *  MEAS <optional parameters> ? configures, arms, triggers and waits
  79  *       for a reading
  80  *  CONF <parameters> configures
  81  *  INIT prepares for triggering (trigger mode is not set, assumed
  82  *       internal - external might time out)
  83  *  *OPC waits for completion, and
  84  *  READ? retrieves the result
  85  */
  86 static const struct scpi_command cmdset_hp[] = {
  87         { DMM_CMD_SETUP_REMOTE, "\n", },
  88         { DMM_CMD_SETUP_FUNC, "CONF:%s", },
  89         { DMM_CMD_QUERY_FUNC, "CONF?", },
  90         { DMM_CMD_START_ACQ, "INIT", },
  91         { DMM_CMD_STOP_ACQ, "ABORT", },
  92         { DMM_CMD_QUERY_VALUE, "READ?", },
  93         { DMM_CMD_QUERY_PREC, "CONF?", },
  94         ALL_ZERO,
  95 };
  96
  97 static const struct scpi_command cmdset_gwinstek[] = {
  98         { DMM_CMD_SETUP_REMOTE, "SYST:REM", },
  99         { DMM_CMD_SETUP_LOCAL, "SYST:LOC", },
 100         { DMM_CMD_SETUP_FUNC, "CONF:%s", },
 101         { DMM_CMD_QUERY_FUNC, "CONF:STAT:FUNC?", },
 102         { DMM_CMD_START_ACQ, "*CLS;SYST:REM", },
 103         { DMM_CMD_QUERY_VALUE, "VAL1?", },
 104         { DMM_CMD_QUERY_PREC, "SENS:DET:RATE?", },
 105         ALL_ZERO,
 106 };
 107
 108 static const struct scpi_command cmdset_gwinstek_906x[] = {
 109         { DMM_CMD_SETUP_REMOTE, "SYST:REM", },
 110         { DMM_CMD_SETUP_LOCAL, "SYST:LOC", },
 111         { DMM_CMD_SETUP_FUNC, "CONF:%s", },
 112         { DMM_CMD_QUERY_FUNC, "CONF?", },
 113         { DMM_CMD_START_ACQ, "INIT", },
 114         { DMM_CMD_STOP_ACQ, "ABORT", },
 115         { DMM_CMD_QUERY_VALUE, "VAL1?", },
 116         { DMM_CMD_QUERY_PREC, "SENS:DET:RATE?", },
 117         ALL_ZERO,
 118 };
 119
 120 static const struct scpi_command cmdset_owon[] = {
 121         { DMM_CMD_SETUP_REMOTE, "SYST:REM", },
 122         { DMM_CMD_SETUP_LOCAL, "SYST:LOC", },
 123         { DMM_CMD_SETUP_FUNC, "CONF:%s", },
 124         { DMM_CMD_QUERY_FUNC, "FUNC?", },
 125         { DMM_CMD_QUERY_VALUE, "MEAS1?", },
 126         ALL_ZERO,
 127 };
 128
 129 static const struct mqopt_item mqopts_agilent_34405a[] = {
 130         { SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "VOLT ", NO_DFLT_PREC, FLAGS_NONE, },
 131         { SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "VOLT:AC ", NO_DFLT_PREC, FLAG_CONF_DELAY | FLAG_MEAS_DELAY, },
 132         { SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "CURR ", NO_DFLT_PREC, FLAGS_NONE, },
 133         { SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "CURR:AC ", NO_DFLT_PREC, FLAG_CONF_DELAY | FLAG_MEAS_DELAY, },
 134         { SR_MQ_RESISTANCE, 0, "RES", "RES ", NO_DFLT_PREC, FLAG_MEAS_DELAY, },
 135         { SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "FRES ", NO_DFLT_PREC, FLAG_MEAS_DELAY, },
 136         { SR_MQ_CONTINUITY, 0, "CONT", "CONT", -1, FLAG_NO_RANGE, },
 137         { SR_MQ_CAPACITANCE, 0, "CAP", "CAP ", NO_DFLT_PREC, FLAGS_NONE, },
 138         { SR_MQ_VOLTAGE, SR_MQFLAG_DC | SR_MQFLAG_DIODE, "DIOD", "DIOD", -4, FLAG_NO_RANGE, },
 139         { SR_MQ_TEMPERATURE, 0, "TEMP", "TEMP ", NO_DFLT_PREC, FLAG_NO_RANGE | FLAG_MEAS_DELAY, },
 140         { SR_MQ_FREQUENCY, 0, "FREQ", "FREQ ", NO_DFLT_PREC, FLAG_NO_RANGE | FLAG_MEAS_DELAY, },
 141 };
 142
 143 static const struct mqopt_item mqopts_agilent_34401a[] = {
 144         { SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "VOLT ", NO_DFLT_PREC, FLAGS_NONE, },
 145         { SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "VOLT:AC ", NO_DFLT_PREC, FLAGS_NONE, },
 146         { SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "CURR ", NO_DFLT_PREC, FLAGS_NONE, },
 147         { SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "CURR:AC ", NO_DFLT_PREC, FLAGS_NONE, },
 148         { SR_MQ_RESISTANCE, 0, "RES", "RES ", NO_DFLT_PREC, FLAGS_NONE, },
 149         { SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "FRES ", NO_DFLT_PREC, FLAGS_NONE, },
 150         { SR_MQ_CONTINUITY, 0, "CONT", "CONT", -1, FLAGS_NONE, },
 151         { SR_MQ_VOLTAGE, SR_MQFLAG_DC | SR_MQFLAG_DIODE, "DIOD", "DIOD", -4, FLAGS_NONE, },
 152         { SR_MQ_FREQUENCY, 0, "FREQ", "FREQ ", NO_DFLT_PREC, FLAGS_NONE, },
 153         { SR_MQ_TIME, 0, "PER", "PER ", NO_DFLT_PREC, FLAGS_NONE, },
 154 };
 155
 156 static const struct mqopt_item mqopts_gwinstek_gdm8200a[] = {
 157         { SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "01", NO_DFLT_PREC, FLAGS_NONE, },
 158         { SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "02", NO_DFLT_PREC, FLAGS_NONE, },
 159         { SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "03", NO_DFLT_PREC, FLAGS_NONE, },
 160         { SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "04", NO_DFLT_PREC, FLAGS_NONE, },
 161         { SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "05", NO_DFLT_PREC, FLAGS_NONE, }, /* mA */
 162         { SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "06", NO_DFLT_PREC, FLAGS_NONE, }, /* mA */
 163         { SR_MQ_RESISTANCE, 0, "RES", "07", NO_DFLT_PREC, FLAGS_NONE, },
 164         { SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "16", NO_DFLT_PREC, FLAGS_NONE, },
 165         { SR_MQ_CONTINUITY, 0, "CONT", "13", -1, FLAGS_NONE, },
 166         { SR_MQ_VOLTAGE, SR_MQFLAG_DC | SR_MQFLAG_DIODE, "DIOD", "17", -4, FLAGS_NONE, },
 167         { SR_MQ_TEMPERATURE, 0, "TEMP", "09", NO_DFLT_PREC, FLAGS_NONE, }, /* Celsius */
 168         { SR_MQ_TEMPERATURE, 0, "TEMP", "15", NO_DFLT_PREC, FLAGS_NONE, }, /* Fahrenheit */
 169         { SR_MQ_FREQUENCY, 0, "FREQ", "08", NO_DFLT_PREC, FLAGS_NONE, },
 170         { SR_MQ_TIME, 0, "PER", "14", NO_DFLT_PREC, FLAGS_NONE, },
 171 };
 172
 173 static const struct mqopt_item mqopts_gwinstek_gdm906x[] = {
 174         { SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "VOLT ", NO_DFLT_PREC, FLAGS_NONE, },
 175         { SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "VOLT:AC", NO_DFLT_PREC, FLAGS_NONE, },
 176         { SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "CURR ", NO_DFLT_PREC, FLAGS_NONE, },
 177         { SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "CURR:AC", NO_DFLT_PREC, FLAGS_NONE, },
 178         { SR_MQ_RESISTANCE, 0, "RES", "RES", NO_DFLT_PREC, FLAGS_NONE, },
 179         { SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "FRES", NO_DFLT_PREC, FLAGS_NONE, },
 180         { SR_MQ_CONTINUITY, 0, "CONT", "CONT", -1, FLAGS_NONE, },
 181         { SR_MQ_VOLTAGE, SR_MQFLAG_DC | SR_MQFLAG_DIODE, "DIOD", "DIOD", -4, FLAGS_NONE, },
 182         { SR_MQ_TEMPERATURE, 0, "TEMP", "TEMP", NO_DFLT_PREC, FLAGS_NONE, },
 183         { SR_MQ_FREQUENCY, 0, "FREQ", "FREQ", NO_DFLT_PREC, FLAGS_NONE, },
 184         { SR_MQ_TIME, 0, "PER", "PER", NO_DFLT_PREC, FLAGS_NONE, },
 185         { SR_MQ_CAPACITANCE, 0, "CAP", "CAP", NO_DFLT_PREC, FLAGS_NONE, },
 186 };
 187
 188 static const struct mqopt_item mqopts_owon_xdm2041[] = {
 189         { SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "VOLT AC", NO_DFLT_PREC, FLAGS_NONE, },
 190         { SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "VOLT", NO_DFLT_PREC, FLAGS_NONE, },
 191         { SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "CURR AC", NO_DFLT_PREC, FLAGS_NONE, },
 192         { SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "CURR", NO_DFLT_PREC, FLAGS_NONE, },
 193         { SR_MQ_RESISTANCE, 0, "RES", "RES", NO_DFLT_PREC, FLAGS_NONE, },
 194         { SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "FRES", NO_DFLT_PREC, FLAGS_NONE, },
 195         { SR_MQ_CONTINUITY, 0, "CONT", "CONT", -1, FLAGS_NONE, },
 196         { SR_MQ_VOLTAGE, SR_MQFLAG_DC | SR_MQFLAG_DIODE, "DIOD", "DIOD", -4, FLAGS_NONE, },
 197         { SR_MQ_TEMPERATURE, 0, "TEMP", "TEMP", NO_DFLT_PREC, FLAGS_NONE, },
 198         { SR_MQ_FREQUENCY, 0, "FREQ", "FREQ", NO_DFLT_PREC, FLAGS_NONE, },
 199         { SR_MQ_CAPACITANCE, 0, "CAP", "CAP", NO_DFLT_PREC, FLAGS_NONE, },
 200 };
 201
 202 static const struct mqopt_item mqopts_siglent_sdm3055[] = {
 203         { SR_MQ_VOLTAGE, SR_MQFLAG_DC, "VOLT:DC", "VOLT ", NO_DFLT_PREC, FLAGS_NONE, },
 204         { SR_MQ_VOLTAGE, SR_MQFLAG_AC, "VOLT:AC", "VOLT:AC ", NO_DFLT_PREC, FLAGS_NONE, },
 205         { SR_MQ_CURRENT, SR_MQFLAG_DC, "CURR:DC", "CURR ", NO_DFLT_PREC, FLAGS_NONE, },
 206         { SR_MQ_CURRENT, SR_MQFLAG_AC, "CURR:AC", "CURR:AC ", NO_DFLT_PREC, FLAGS_NONE, },
 207         { SR_MQ_RESISTANCE, 0, "RES", "RES ", NO_DFLT_PREC, FLAGS_NONE, },
 208         { SR_MQ_RESISTANCE, SR_MQFLAG_FOUR_WIRE, "FRES", "FRES ", NO_DFLT_PREC, FLAGS_NONE, },
 209         { SR_MQ_CONTINUITY, 0, "CONT", "CONT", -1, FLAGS_NONE, },
 210         { SR_MQ_VOLTAGE, SR_MQFLAG_DC | SR_MQFLAG_DIODE, "DIOD", "DIOD", -4, FLAGS_NONE, },
 211         { SR_MQ_FREQUENCY, 0, "FREQ", "FREQ ", NO_DFLT_PREC, FLAGS_NONE, },
 212         { SR_MQ_TIME, 0, "PER", "PER ", NO_DFLT_PREC, FLAGS_NONE, },
 213         { SR_MQ_CAPACITANCE, 0, "CAP", "CAP", NO_DFLT_PREC, FLAGS_NONE, },
 214 };
 215
 216 SR_PRIV const struct scpi_dmm_model models[] = {
 217         {
 218                 "Agilent", "34405A",
 219                 1, 5, cmdset_agilent, ARRAY_AND_SIZE(mqopts_agilent_34405a),
 220                 scpi_dmm_get_meas_agilent,
 221                 ARRAY_AND_SIZE(devopts_generic_range),
 222                 0, 200 * 1000, 2500 * 1000, 0, FALSE,
 223                 scpi_dmm_get_range_text, scpi_dmm_set_range_from_text, NULL,
 224         },
 225         {
 226                 "Agilent", "34410A",
 227                 1, 6, cmdset_hp, ARRAY_AND_SIZE(mqopts_agilent_34405a),
 228                 scpi_dmm_get_meas_agilent,
 229                 ARRAY_AND_SIZE(devopts_generic),
 230                 0, 0, 0, 0, FALSE,
 231                 NULL, NULL, NULL,
 232         },
 233         {
 234                 "Agilent", "34460A",
 235                 1, 6, cmdset_agilent, ARRAY_AND_SIZE(mqopts_agilent_34405a),
 236                 scpi_dmm_get_meas_agilent,
 237                 ARRAY_AND_SIZE(devopts_generic_range),
 238                 0, 0, 10 * 1000, 0, FALSE,
 239                 scpi_dmm_get_range_text, scpi_dmm_set_range_from_text, NULL,
 240         },
 241         {
 242                 "GW", "GDM8251A",
 243                 1, 6, cmdset_gwinstek, ARRAY_AND_SIZE(mqopts_gwinstek_gdm8200a),
 244                 scpi_dmm_get_meas_gwinstek,
 245                 ARRAY_AND_SIZE(devopts_generic),
 246                 2500 * 1000, 0, 0, 0, FALSE,
 247                 NULL, NULL, NULL,
 248         },
 249         {
 250                 "GW", "GDM8255A",
 251                 1, 6, cmdset_gwinstek, ARRAY_AND_SIZE(mqopts_gwinstek_gdm8200a),
 252                 scpi_dmm_get_meas_gwinstek,
 253                 ARRAY_AND_SIZE(devopts_generic),
 254                 2500 * 1000, 0, 0, 0, FALSE,
 255                 NULL, NULL, NULL,
 256         },
 257         {
 258                 "GWInstek", "GDM9060",
 259                 1, 6, cmdset_gwinstek_906x, ARRAY_AND_SIZE(mqopts_gwinstek_gdm906x),
 260                 scpi_dmm_get_meas_agilent,
 261                 ARRAY_AND_SIZE(devopts_generic),
 262                 0, 0, 0, 0, FALSE,
 263                 NULL, NULL, NULL,
 264         },
 265         {
 266                 "GWInstek", "GDM9061",
 267                 1, 6, cmdset_gwinstek_906x, ARRAY_AND_SIZE(mqopts_gwinstek_gdm906x),
 268                 scpi_dmm_get_meas_agilent,
 269                 ARRAY_AND_SIZE(devopts_generic),
 270                 0, 0, 0, 0, FALSE,
 271                 NULL, NULL, NULL,
 272         },
 273         {
 274                 "HP", "34401A",
 275                 1, 6, cmdset_hp, ARRAY_AND_SIZE(mqopts_agilent_34401a),
 276                 scpi_dmm_get_meas_agilent,
 277                 ARRAY_AND_SIZE(devopts_generic),
 278                 /* 34401A: typ. 1020ms for AC readings (default is 1000ms). */
 279                 1500 * 1000, 0, 0, 0, FALSE,
 280                 NULL, NULL, NULL,
 281         },
 282         {
 283                 "Keysight", "34465A",
 284                 1, 6, cmdset_agilent, ARRAY_AND_SIZE(mqopts_agilent_34405a),
 285                 scpi_dmm_get_meas_agilent,
 286                 ARRAY_AND_SIZE(devopts_generic_range),
 287                 0, 0, 10 * 1000, 0, FALSE,
 288                 scpi_dmm_get_range_text, scpi_dmm_set_range_from_text, NULL,
 289         },
 290         {
 291                 "OWON", "XDM2041",
 292                 1, 5, cmdset_owon, ARRAY_AND_SIZE(mqopts_owon_xdm2041),
 293                 scpi_dmm_get_meas_gwinstek,
 294                 ARRAY_AND_SIZE(devopts_generic),
 295                 0, 0, 0, 1e9, TRUE,
 296                 NULL, NULL, NULL,
 297         },
 298         {
 299                 "Siglent", "SDM3055",
 300                 1, 5, cmdset_hp, ARRAY_AND_SIZE(mqopts_siglent_sdm3055),
 301                 scpi_dmm_get_meas_agilent,
 302                 ARRAY_AND_SIZE(devopts_generic),
 303                 0, 0, 0, 0, FALSE,
 304                 NULL, NULL, NULL,
 305         },
 306 };
 307
 308 static const struct scpi_dmm_model *is_compatible(const char *vendor, const char *model)
 309 {
 310         size_t i;
 311         const struct scpi_dmm_model *entry;
 312
 313         for (i = 0; i < ARRAY_SIZE(models); i++) {
 314                 entry = &models[i];
 315                 if (!entry->vendor || !entry->model)
 316                         continue;
 317                 if (strcmp(vendor, entry->vendor) != 0)
 318                         continue;
 319                 if (strcmp(model, entry->model) != 0)
 320                         continue;
 321                 return entry;
 322         }
 323
 324         return NULL;
 325 }
 326
 327 /*
 328  * Some devices (such as Owon XDM2041) do not support the standard
 329  * OPeration Complete? command. This function tests the command with
 330  * a short timeout, and returns TRUE if any reply (busy or not) is received.
 331  */
 332 static gboolean probe_opc_support(struct sr_scpi_dev_inst *scpi)
 333 {
 334         gboolean result;
 335         GString *response;
 336
 337         response = g_string_sized_new(128);
 338         result = TRUE;
 339         if (sr_scpi_get_data(scpi, SCPI_CMD_OPC, &response) != SR_OK)
 340                 result = FALSE;
 341         g_string_free(response, TRUE);
 342
 343         return result;
 344 }
 345
 346 static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi)
 347 {
 348         struct sr_scpi_hw_info *hw_info;
 349         int ret;
 350         const char *vendor;
 351         const struct scpi_dmm_model *model;
 352         struct sr_dev_inst *sdi;
 353         struct dev_context *devc;
 354         size_t i;
 355         gchar *channel_name;
 356         const char *command;
 357
 358         ret = sr_scpi_get_hw_id(scpi, &hw_info);
 359         if (ret != SR_OK) {
 360                 sr_info("Could not get IDN response.");
 361                 return NULL;
 362         }
 363         vendor = sr_vendor_alias(hw_info->manufacturer);
 364         model = is_compatible(vendor, hw_info->model);
 365         if (!model) {
 366                 sr_scpi_hw_info_free(hw_info);
 367                 return NULL;
 368         }
 369
 370         if (model->check_opc && !probe_opc_support(scpi))
 371                 scpi->no_opc_command = TRUE;
 372
 373         sdi = g_malloc0(sizeof(*sdi));
 374         sdi->vendor = g_strdup(hw_info->manufacturer);
 375         sdi->model = g_strdup(hw_info->model);
 376         sdi->version = g_strdup(hw_info->firmware_version);
 377         sdi->serial_num = g_strdup(hw_info->serial_number);
 378         sdi->conn = scpi;
 379         sdi->driver = &scpi_dmm_driver_info;
 380         sdi->inst_type = SR_INST_SCPI;
 381         ret = sr_scpi_connection_id(scpi, &sdi->connection_id);
 382         if (ret != SR_OK) {
 383                 g_free(sdi->connection_id);
 384                 sdi->connection_id = NULL;
 385         }
 386         sr_scpi_hw_info_free(hw_info);
 387         if (model->read_timeout_us)  /* non-default read timeout */
 388                 scpi->read_timeout_us = model->read_timeout_us;
 389         devc = g_malloc0(sizeof(*devc));
 390         sdi->priv = devc;
 391         devc->num_channels = model->num_channels;
 392         devc->cmdset = model->cmdset;
 393         devc->model = model;
 394
 395         for (i = 0; i < devc->num_channels; i++) {
 396                 channel_name = g_strdup_printf("P%zu", i + 1);
 397                 sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, channel_name);
 398         }
 399
 400         /*
 401          * If device has DMM_CMD_SETUP_LOCAL command, send it now. To avoid
 402          * leaving device in remote mode (if only a "scan" is run).
 403          */
 404         command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_SETUP_LOCAL);
 405         if (command && *command) {
 406                 scpi_dmm_cmd_delay(scpi);
 407                 sr_scpi_send(scpi, command);
 408         }
 409
 410         return sdi;
 411 }
 412
 413 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 414 {
 415         return sr_scpi_scan(di->context, options, probe_device);
 416 }
 417
 418 static int dev_open(struct sr_dev_inst *sdi)
 419 {
 420         struct sr_scpi_dev_inst *scpi;
 421         int ret;
 422
 423         scpi = sdi->conn;
 424         ret = sr_scpi_open(scpi);
 425         if (ret < 0) {
 426                 sr_err("Failed to open SCPI device: %s.", sr_strerror(ret));
 427                 return SR_ERR;
 428         }
 429
 430         return SR_OK;
 431 }
 432
 433 static int dev_close(struct sr_dev_inst *sdi)
 434 {
 435         struct dev_context *devc;
 436         struct sr_scpi_dev_inst *scpi;
 437         const char *command;
 438
 439         devc = sdi->priv;
 440         scpi = sdi->conn;
 441         if (!scpi)
 442                 return SR_ERR_BUG;
 443
 444         sr_dbg("DIAG: sdi->status %d.", sdi->status - SR_ST_NOT_FOUND);
 445         if (sdi->status <= SR_ST_INACTIVE)
 446                 return SR_OK;
 447
 448         /*
 449          * If device has DMM_CMD_SETUP_LOCAL command, send it now
 450          * to avoid leaving device in remote mode.
 451          */
 452         command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_SETUP_LOCAL);
 453         if (command && *command) {
 454                 scpi_dmm_cmd_delay(scpi);
 455                 sr_scpi_send(scpi, command);
 456         }
 457
 458         return sr_scpi_close(scpi);
 459 }
 460
 461 static int config_get(uint32_t key, GVariant **data,
 462         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 463 {
 464         struct dev_context *devc;
 465         enum sr_mq mq;
 466         enum sr_mqflag mqflag;
 467         GVariant *arr[2];
 468         int ret;
 469         const char *range;
 470
 471         (void)cg;
 472
 473         devc = sdi->priv;
 474
 475         switch (key) {
 476         case SR_CONF_CONN:
 477                 if (!sdi || !sdi->connection_id)
 478                         return SR_ERR_NA;
 479                 *data = g_variant_new_string(sdi->connection_id);
 480                 return SR_OK;
 481         case SR_CONF_LIMIT_SAMPLES:
 482         case SR_CONF_LIMIT_MSEC:
 483                 return sr_sw_limits_config_get(&devc->limits, key, data);
 484         case SR_CONF_MEASURED_QUANTITY:
 485                 ret = scpi_dmm_get_mq(sdi, &mq, &mqflag, NULL, NULL);
 486                 if (ret != SR_OK)
 487                         return ret;
 488                 arr[0] = g_variant_new_uint32(mq);
 489                 arr[1] = g_variant_new_uint64(mqflag);
 490                 *data = g_variant_new_tuple(arr, ARRAY_SIZE(arr));
 491                 return SR_OK;
 492         case SR_CONF_RANGE:
 493                 if (!devc || !devc->model->get_range_text)
 494                         return SR_ERR_NA;
 495                 range = devc->model->get_range_text(sdi);
 496                 if (!range || !*range)
 497                         return SR_ERR_NA;
 498                 *data = g_variant_new_string(range);
 499                 return SR_OK;
 500         default:
 501                 return SR_ERR_NA;
 502         }
 503 }
 504
 505 static int config_set(uint32_t key, GVariant *data,
 506         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 507 {
 508         struct dev_context *devc;
 509         enum sr_mq mq;
 510         enum sr_mqflag mqflag;
 511         GVariant *tuple_child;
 512         const char *range;
 513
 514         (void)cg;
 515
 516         devc = sdi->priv;
 517
 518         switch (key) {
 519         case SR_CONF_LIMIT_SAMPLES:
 520         case SR_CONF_LIMIT_MSEC:
 521                 return sr_sw_limits_config_set(&devc->limits, key, data);
 522         case SR_CONF_MEASURED_QUANTITY:
 523                 tuple_child = g_variant_get_child_value(data, 0);
 524                 mq = g_variant_get_uint32(tuple_child);
 525                 g_variant_unref(tuple_child);
 526                 tuple_child = g_variant_get_child_value(data, 1);
 527                 mqflag = g_variant_get_uint64(tuple_child);
 528                 g_variant_unref(tuple_child);
 529                 return scpi_dmm_set_mq(sdi, mq, mqflag);
 530         case SR_CONF_RANGE:
 531                 if (!devc || !devc->model->set_range_from_text)
 532                         return SR_ERR_NA;
 533                 range = g_variant_get_string(data, NULL);
 534                 return devc->model->set_range_from_text(sdi, range);
 535         default:
 536                 return SR_ERR_NA;
 537         }
 538 }
 539
 540 static int config_list(uint32_t key, GVariant **data,
 541         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 542 {
 543         struct dev_context *devc;
 544         GVariant *gvar, *arr[2];
 545         GVariantBuilder gvb;
 546         size_t i;
 547
 548         (void)cg;
 549
 550         devc = sdi ? sdi->priv : NULL;
 551
 552         switch (key) {
 553         case SR_CONF_SCAN_OPTIONS:
 554         case SR_CONF_DEVICE_OPTIONS:
 555                 if (!devc)
 556                         return STD_CONFIG_LIST(key, data, sdi, cg,
 557                                 scanopts, drvopts, devopts_generic);
 558                 return std_opts_config_list(key, data, sdi, cg,
 559                         ARRAY_AND_SIZE(scanopts), ARRAY_AND_SIZE(drvopts),
 560                         devc->model->devopts, devc->model->devopts_size);
 561         case SR_CONF_MEASURED_QUANTITY:
 562                 /* TODO Use std_gvar_measured_quantities() when available. */
 563                 if (!devc)
 564                         return SR_ERR_ARG;
 565                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 566                 for (i = 0; i < devc->model->mqopt_size; i++) {
 567                         arr[0] = g_variant_new_uint32(devc->model->mqopts[i].mq);
 568                         arr[1] = g_variant_new_uint64(devc->model->mqopts[i].mqflag);
 569                         gvar = g_variant_new_tuple(arr, ARRAY_SIZE(arr));
 570                         g_variant_builder_add_value(&gvb, gvar);
 571                 }
 572                 *data = g_variant_builder_end(&gvb);
 573                 return SR_OK;
 574         case SR_CONF_RANGE:
 575                 if (!devc || !devc->model->get_range_text_list)
 576                         return SR_ERR_NA;
 577                 *data = devc->model->get_range_text_list(sdi);
 578                 return SR_OK;
 579         default:
 580                 (void)devc;
 581                 return SR_ERR_NA;
 582         }
 583 }
 584
 585 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 586 {
 587         struct sr_scpi_dev_inst *scpi;
 588         struct dev_context *devc;
 589         int ret;
 590         const struct mqopt_item *item;
 591         const char *command;
 592         char *response;
 593         gboolean do_mq_meas_delay;
 594
 595         scpi = sdi->conn;
 596         devc = sdi->priv;
 597
 598         ret = scpi_dmm_get_mq(sdi, &devc->start_acq_mq.curr_mq,
 599                 &devc->start_acq_mq.curr_mqflag, NULL, &item);
 600         if (ret != SR_OK)
 601                 return ret;
 602
 603         /*
 604          * Query for current precision if DMM supports the command
 605          */
 606         command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_QUERY_PREC);
 607         if (command && *command) {
 608                 scpi_dmm_cmd_delay(scpi);
 609                 ret = sr_scpi_get_string(scpi, command, &response);
 610                 if (ret == SR_OK) {
 611                         g_strstrip(response);
 612                         g_free(devc->precision);
 613                         devc->precision = g_strdup(response);
 614                         g_free(response);
 615                         sr_dbg("%s: Precision: '%s'", __func__, devc->precision);
 616                 } else {
 617                         sr_info("Precision query ('%s') failed: %d",
 618                                 command, ret);
 619                 }
 620         }
 621
 622         command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_START_ACQ);
 623         if (command && *command) {
 624                 scpi_dmm_cmd_delay(scpi);
 625                 ret = sr_scpi_send(scpi, command);
 626                 if (ret != SR_OK)
 627                         return ret;
 628         }
 629
 630         do_mq_meas_delay = item->drv_flags & FLAG_MEAS_DELAY;
 631         if (do_mq_meas_delay && devc->model->meas_delay_us)
 632                 g_usleep(devc->model->meas_delay_us);
 633
 634         sr_sw_limits_acquisition_start(&devc->limits);
 635         ret = std_session_send_df_header(sdi);
 636         if (ret != SR_OK)
 637                 return ret;
 638
 639         ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10,
 640                 scpi_dmm_receive_data, (void *)sdi);
 641         if (ret != SR_OK)
 642                 return ret;
 643
 644         return SR_OK;
 645 }
 646
 647 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 648 {
 649         struct sr_scpi_dev_inst *scpi;
 650         struct dev_context *devc;
 651         const char *command;
 652
 653         scpi = sdi->conn;
 654         devc = sdi->priv;
 655
 656         command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_STOP_ACQ);
 657         if (command && *command) {
 658                 scpi_dmm_cmd_delay(scpi);
 659                 (void)sr_scpi_send(scpi, command);
 660         }
 661         sr_scpi_source_remove(sdi->session, scpi);
 662
 663         std_session_send_df_end(sdi);
 664
 665         g_free(devc->precision);
 666         devc->precision = NULL;
 667
 668         return SR_OK;
 669 }
 670
 671 static struct sr_dev_driver scpi_dmm_driver_info = {
 672         .name = "scpi-dmm",
 673         .longname = "SCPI DMM",
 674         .api_version = 1,
 675         .init = std_init,
 676         .cleanup = std_cleanup,
 677         .scan = scan,
 678         .dev_list = std_dev_list,
 679         .dev_clear = std_dev_clear,
 680         .config_get = config_get,
 681         .config_set = config_set,
 682         .config_list = config_list,
 683         .dev_open = dev_open,
 684         .dev_close = dev_close,
 685         .dev_acquisition_start = dev_acquisition_start,
 686         .dev_acquisition_stop = dev_acquisition_stop,
 687         .context = NULL,
 688 };
 689 SR_REGISTER_DEV_DRIVER(scpi_dmm_driver_info);