src/hardware/agilent-dmm/protocol.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
   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 <config.h>
  21 #include <glib.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <math.h>
  25 #include <libsigrok/libsigrok.h>
  26 #include "libsigrok-internal.h"
  27 #include "protocol.h"
  28
  29 static void dispatch(const struct sr_dev_inst *sdi)
  30 {
  31         struct dev_context *devc;
  32         const struct agdmm_job *jobs;
  33         int64_t now;
  34         int i;
  35
  36         devc = sdi->priv;
  37         jobs = devc->profile->jobs;
  38         now = g_get_monotonic_time() / 1000;
  39         for (i = 0; (&jobs[i])->interval; i++) {
  40                 if (now - devc->jobqueue[i] > (&jobs[i])->interval) {
  41                         sr_spew("Running job %d.", i);
  42                         (&jobs[i])->send(sdi);
  43                         devc->jobqueue[i] = now;
  44                 }
  45         }
  46 }
  47
  48 static void receive_line(const struct sr_dev_inst *sdi)
  49 {
  50         struct dev_context *devc;
  51         const struct agdmm_recv *recvs, *recv;
  52         GRegex *reg;
  53         GMatchInfo *match;
  54         int i;
  55
  56         devc = sdi->priv;
  57
  58         /* Strip CRLF */
  59         while (devc->buflen) {
  60                 if (*(devc->buf + devc->buflen - 1) == '\r'
  61                                 || *(devc->buf + devc->buflen - 1) == '\n')
  62                         *(devc->buf + --devc->buflen) = '\0';
  63                 else
  64                         break;
  65         }
  66         sr_spew("Received '%s'.", devc->buf);
  67
  68         recv = NULL;
  69         recvs = devc->profile->recvs;
  70         for (i = 0; (&recvs[i])->recv_regex; i++) {
  71                 reg = g_regex_new((&recvs[i])->recv_regex, 0, 0, NULL);
  72                 if (g_regex_match(reg, (char *)devc->buf, 0, &match)) {
  73                         recv = &recvs[i];
  74                         break;
  75                 }
  76                 g_match_info_unref(match);
  77                 g_regex_unref(reg);
  78         }
  79         if (recv) {
  80                 recv->recv(sdi, match);
  81                 g_match_info_unref(match);
  82                 g_regex_unref(reg);
  83         } else
  84                 sr_dbg("Unknown line '%s'.", devc->buf);
  85
  86         /* Done with this. */
  87         devc->buflen = 0;
  88 }
  89
  90 SR_PRIV int agdmm_receive_data(int fd, int revents, void *cb_data)
  91 {
  92         struct sr_dev_inst *sdi;
  93         struct dev_context *devc;
  94         struct sr_serial_dev_inst *serial;
  95         int len;
  96
  97         (void)fd;
  98
  99         if (!(sdi = cb_data))
 100                 return TRUE;
 101
 102         if (!(devc = sdi->priv))
 103                 return TRUE;
 104
 105         serial = sdi->conn;
 106         if (revents == G_IO_IN) {
 107                 /* Serial data arrived. */
 108                 while (AGDMM_BUFSIZE - devc->buflen - 1 > 0) {
 109                         len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
 110                         if (len < 1)
 111                                 break;
 112                         devc->buflen += len;
 113                         *(devc->buf + devc->buflen) = '\0';
 114                         if (*(devc->buf + devc->buflen - 1) == '\n') {
 115                                 /* End of line */
 116                                 receive_line(sdi);
 117                                 break;
 118                         }
 119                 }
 120         }
 121
 122         dispatch(sdi);
 123
 124         if (sr_sw_limits_check(&devc->limits))
 125                 sdi->driver->dev_acquisition_stop(sdi);
 126
 127         return TRUE;
 128 }
 129
 130 static int agdmm_send(const struct sr_dev_inst *sdi, const char *cmd)
 131 {
 132         struct sr_serial_dev_inst *serial;
 133         char buf[32];
 134
 135         serial = sdi->conn;
 136
 137         sr_spew("Sending '%s'.", cmd);
 138         strncpy(buf, cmd, 28);
 139         if (!strncmp(buf, "*IDN?", 5))
 140                 strcat(buf, "\r\n");
 141         else
 142                 strcat(buf, "\n\r\n");
 143         if (serial_write_blocking(serial, buf, strlen(buf), SERIAL_WRITE_TIMEOUT_MS) < (int)strlen(buf)) {
 144                 sr_err("Failed to send.");
 145                 return SR_ERR;
 146         }
 147
 148         return SR_OK;
 149 }
 150
 151 static int send_stat(const struct sr_dev_inst *sdi)
 152 {
 153         return agdmm_send(sdi, "STAT?");
 154 }
 155
 156 static int recv_stat_u123x(const struct sr_dev_inst *sdi, GMatchInfo *match)
 157 {
 158         struct dev_context *devc;
 159         char *s;
 160
 161         devc = sdi->priv;
 162         s = g_match_info_fetch(match, 1);
 163         sr_spew("STAT response '%s'.", s);
 164
 165         /* Max, Min or Avg mode -- no way to tell which, so we'll
 166          * set both flags to denote it's not a normal measurement. */
 167         if (s[0] == '1')
 168                 devc->cur_mqflags |= SR_MQFLAG_MAX | SR_MQFLAG_MIN;
 169         else
 170                 devc->cur_mqflags &= ~(SR_MQFLAG_MAX | SR_MQFLAG_MIN);
 171
 172         if (s[1] == '1')
 173                 devc->cur_mqflags |= SR_MQFLAG_RELATIVE;
 174         else
 175                 devc->cur_mqflags &= ~SR_MQFLAG_RELATIVE;
 176
 177         /* Triggered or auto hold modes. */
 178         if (s[2] == '1' || s[3] == '1')
 179                 devc->cur_mqflags |= SR_MQFLAG_HOLD;
 180         else
 181                 devc->cur_mqflags &= ~SR_MQFLAG_HOLD;
 182
 183         /* Temp/aux mode. */
 184         if (s[7] == '1')
 185                 devc->mode_tempaux = TRUE;
 186         else
 187                 devc->mode_tempaux = FALSE;
 188
 189         /* Continuity mode. */
 190         if (s[16] == '1')
 191                 devc->mode_continuity = TRUE;
 192         else
 193                 devc->mode_continuity = FALSE;
 194
 195         g_free(s);
 196
 197         return SR_OK;
 198 }
 199
 200 static int recv_stat_u124x(const struct sr_dev_inst *sdi, GMatchInfo *match)
 201 {
 202         struct dev_context *devc;
 203         char *s;
 204
 205         devc = sdi->priv;
 206         s = g_match_info_fetch(match, 1);
 207         sr_spew("STAT response '%s'.", s);
 208
 209         /* Max, Min or Avg mode -- no way to tell which, so we'll
 210          * set both flags to denote it's not a normal measurement. */
 211         if (s[0] == '1')
 212                 devc->cur_mqflags |= SR_MQFLAG_MAX | SR_MQFLAG_MIN;
 213         else
 214                 devc->cur_mqflags &= ~(SR_MQFLAG_MAX | SR_MQFLAG_MIN);
 215
 216         if (s[1] == '1')
 217                 devc->cur_mqflags |= SR_MQFLAG_RELATIVE;
 218         else
 219                 devc->cur_mqflags &= ~SR_MQFLAG_RELATIVE;
 220
 221         /* Hold mode. */
 222         if (s[7] == '1')
 223                 devc->cur_mqflags |= SR_MQFLAG_HOLD;
 224         else
 225                 devc->cur_mqflags &= ~SR_MQFLAG_HOLD;
 226
 227         g_free(s);
 228
 229         return SR_OK;
 230 }
 231
 232 static int recv_stat_u125x(const struct sr_dev_inst *sdi, GMatchInfo *match)
 233 {
 234         struct dev_context *devc;
 235         char *s;
 236
 237         devc = sdi->priv;
 238         s = g_match_info_fetch(match, 1);
 239         sr_spew("STAT response '%s'.", s);
 240
 241         /* Peak hold mode. */
 242         if (s[4] == '1')
 243                 devc->cur_mqflags |= SR_MQFLAG_MAX;
 244         else
 245                 devc->cur_mqflags &= ~SR_MQFLAG_MAX;
 246
 247         /* Triggered hold mode. */
 248         if (s[7] == '1')
 249                 devc->cur_mqflags |= SR_MQFLAG_HOLD;
 250         else
 251                 devc->cur_mqflags &= ~SR_MQFLAG_HOLD;
 252
 253         g_free(s);
 254
 255         return SR_OK;
 256 }
 257
 258 static int recv_stat_u128x(const struct sr_dev_inst *sdi, GMatchInfo *match)
 259 {
 260         struct dev_context *devc;
 261         char *s;
 262
 263         devc = sdi->priv;
 264         s = g_match_info_fetch(match, 1);
 265         sr_spew("STAT response '%s'.", s);
 266
 267         /* Max, Min or Avg mode -- no way to tell which, so we'll
 268          * set both flags to denote it's not a normal measurement. */
 269         if (s[0] == '1')
 270                 devc->cur_mqflags |= SR_MQFLAG_MAX | SR_MQFLAG_MIN | SR_MQFLAG_AVG;
 271         else
 272                 devc->cur_mqflags &= ~(SR_MQFLAG_MAX | SR_MQFLAG_MIN | SR_MQFLAG_AVG);
 273
 274         /* Peak hold mode. */
 275         if (s[4] == '4')
 276                 devc->cur_mqflags |= SR_MQFLAG_MAX;
 277         else
 278                 devc->cur_mqflags &= ~SR_MQFLAG_MAX;
 279
 280         /* Null function. */
 281         if (s[1] == '1')
 282                 devc->cur_mqflags |= SR_MQFLAG_RELATIVE;
 283         else
 284                 devc->cur_mqflags &= ~SR_MQFLAG_RELATIVE;
 285
 286         /* Triggered or auto hold modes. */
 287         if (s[7] == '1' || s[11] == '1')
 288                 devc->cur_mqflags |= SR_MQFLAG_HOLD;
 289         else
 290                 devc->cur_mqflags &= ~SR_MQFLAG_HOLD;
 291
 292         g_free(s);
 293
 294         return SR_OK;
 295 }
 296
 297 static int send_fetc(const struct sr_dev_inst *sdi)
 298 {
 299         struct dev_context *devc;
 300         devc = sdi->priv;
 301         if (devc->mode_squarewave)
 302                 return SR_OK;
 303         return agdmm_send(sdi, "FETC?");
 304 }
 305
 306 static int recv_fetc(const struct sr_dev_inst *sdi, GMatchInfo *match)
 307 {
 308         struct dev_context *devc;
 309         struct sr_datafeed_packet packet;
 310         struct sr_datafeed_analog analog;
 311         struct sr_analog_encoding encoding;
 312         struct sr_analog_meaning meaning;
 313         struct sr_analog_spec spec;
 314         float fvalue;
 315         const char *s;
 316         char *mstr;
 317
 318         sr_spew("FETC reply '%s'.", g_match_info_get_string(match));
 319         devc = sdi->priv;
 320
 321         if (devc->cur_mq == -1)
 322                 /* Haven't seen configuration yet, so can't know what
 323                  * the fetched float means. Not really an error, we'll
 324                  * get metadata soon enough. */
 325                 return SR_OK;
 326
 327         s = g_match_info_get_string(match);
 328         if (!strcmp(s, "-9.90000000E+37") || !strcmp(s, "+9.90000000E+37")) {
 329                 /* An invalid measurement shows up on the display as "O.L", but
 330                  * comes through like this. Since comparing 38-digit floats
 331                  * is rather problematic, we'll cut through this here. */
 332                 fvalue = NAN;
 333         } else {
 334                 mstr = g_match_info_fetch(match, 1);
 335                 if (sr_atof_ascii(mstr, &fvalue) != SR_OK) {
 336                         g_free(mstr);
 337                         sr_dbg("Invalid float.");
 338                         return SR_ERR;
 339                 }
 340                 g_free(mstr);
 341                 if (devc->cur_exponent != 0)
 342                         fvalue *= powf(10, devc->cur_exponent);
 343         }
 344
 345         sr_analog_init(&analog, &encoding, &meaning, &spec,
 346                        devc->cur_digits - devc->cur_exponent);
 347         analog.meaning->mq = devc->cur_mq;
 348         analog.meaning->unit = devc->cur_unit;
 349         analog.meaning->mqflags = devc->cur_mqflags;
 350         analog.meaning->channels = sdi->channels;
 351         analog.num_samples = 1;
 352         analog.data = &fvalue;
 353         encoding.digits = devc->cur_encoding - devc->cur_exponent;
 354         packet.type = SR_DF_ANALOG;
 355         packet.payload = &analog;
 356         sr_session_send(sdi, &packet);
 357
 358         sr_sw_limits_update_samples_read(&devc->limits, 1);
 359
 360         return SR_OK;
 361 }
 362
 363 static int send_conf(const struct sr_dev_inst *sdi)
 364 {
 365         return agdmm_send(sdi, "CONF?");
 366 }
 367
 368 static int recv_conf_u123x(const struct sr_dev_inst *sdi, GMatchInfo *match)
 369 {
 370         struct dev_context *devc;
 371         char *mstr, *rstr;
 372         int resolution;
 373
 374         sr_spew("CONF? response '%s'.", g_match_info_get_string(match));
 375         devc = sdi->priv;
 376
 377         rstr = g_match_info_fetch(match, 2);
 378         if (rstr)
 379                 sr_atoi(rstr, &resolution);
 380         g_free(rstr);
 381
 382         mstr = g_match_info_fetch(match, 1);
 383         if (!strcmp(mstr, "V")) {
 384                 devc->cur_mq = SR_MQ_VOLTAGE;
 385                 devc->cur_unit = SR_UNIT_VOLT;
 386                 devc->cur_mqflags = 0;
 387                 devc->cur_exponent = 0;
 388                 devc->cur_digits = 4 - resolution;
 389         } else if (!strcmp(mstr, "MV")) {
 390                 if (devc->mode_tempaux) {
 391                         devc->cur_mq = SR_MQ_TEMPERATURE;
 392                         /* No way to detect whether Fahrenheit or Celsius
 393                          * is used, so we'll just default to Celsius. */
 394                         devc->cur_unit = SR_UNIT_CELSIUS;
 395                 devc->cur_mqflags = 0;
 396                 devc->cur_exponent = 0;
 397                         devc->cur_digits = 1;
 398                 } else {
 399                         devc->cur_mq = SR_MQ_VOLTAGE;
 400                         devc->cur_unit = SR_UNIT_VOLT;
 401                         devc->cur_mqflags = 0;
 402                         devc->cur_exponent = -3;
 403                         devc->cur_digits = 5 - resolution;
 404                 }
 405         } else if (!strcmp(mstr, "A")) {
 406                 devc->cur_mq = SR_MQ_CURRENT;
 407                 devc->cur_unit = SR_UNIT_AMPERE;
 408                 devc->cur_mqflags = 0;
 409                 devc->cur_exponent = 0;
 410                 devc->cur_digits = 3 - resolution;
 411         } else if (!strcmp(mstr, "UA")) {
 412                 devc->cur_mq = SR_MQ_CURRENT;
 413                 devc->cur_unit = SR_UNIT_AMPERE;
 414                 devc->cur_mqflags = 0;
 415                 devc->cur_exponent = -6;
 416                 devc->cur_digits = 8 - resolution;
 417         } else if (!strcmp(mstr, "FREQ")) {
 418                 devc->cur_mq = SR_MQ_FREQUENCY;
 419                 devc->cur_unit = SR_UNIT_HERTZ;
 420                 devc->cur_mqflags = 0;
 421                 devc->cur_exponent = 0;
 422                 devc->cur_digits = 2 - resolution;
 423         } else if (!strcmp(mstr, "RES")) {
 424                 if (devc->mode_continuity) {
 425                         devc->cur_mq = SR_MQ_CONTINUITY;
 426                         devc->cur_unit = SR_UNIT_BOOLEAN;
 427                 } else {
 428                         devc->cur_mq = SR_MQ_RESISTANCE;
 429                         devc->cur_unit = SR_UNIT_OHM;
 430                 }
 431                 devc->cur_mqflags = 0;
 432                 devc->cur_exponent = 0;
 433                 devc->cur_digits = 1 - resolution;
 434         } else if (!strcmp(mstr, "DIOD")) {
 435                 devc->cur_mq = SR_MQ_VOLTAGE;
 436                 devc->cur_unit = SR_UNIT_VOLT;
 437                 devc->cur_mqflags = SR_MQFLAG_DIODE;
 438                 devc->cur_exponent = 0;
 439                 devc->cur_digits = 3;
 440         } else if (!strcmp(mstr, "CAP")) {
 441                 devc->cur_mq = SR_MQ_CAPACITANCE;
 442                 devc->cur_unit = SR_UNIT_FARAD;
 443                 devc->cur_mqflags = 0;
 444                 devc->cur_exponent = 0;
 445                 devc->cur_digits = 9 - resolution;
 446         } else
 447                 sr_dbg("Unknown first argument.");
 448         g_free(mstr);
 449
 450         /* This is based on guess, supposing similarity with other models. */
 451         devc->cur_encoding = devc->cur_digits + 1;
 452
 453         if (g_match_info_get_match_count(match) == 4) {
 454                 mstr = g_match_info_fetch(match, 3);
 455                 /* Third value, if present, is always AC or DC. */
 456                 if (!strcmp(mstr, "AC")) {
 457                         devc->cur_mqflags |= SR_MQFLAG_AC;
 458                         if (devc->cur_mq == SR_MQ_VOLTAGE)
 459                                 devc->cur_mqflags |= SR_MQFLAG_RMS;
 460                 } else if (!strcmp(mstr, "DC")) {
 461                         devc->cur_mqflags |= SR_MQFLAG_DC;
 462                 } else {
 463                 sr_dbg("Unknown first argument '%s'.", mstr);
 464                 }
 465                 g_free(mstr);
 466         } else
 467                 devc->cur_mqflags &= ~(SR_MQFLAG_AC | SR_MQFLAG_DC);
 468
 469         return SR_OK;
 470 }
 471
 472 static int recv_conf_u124x_5x(const struct sr_dev_inst *sdi, GMatchInfo *match)
 473 {
 474         struct dev_context *devc;
 475         char *mstr, *rstr, *m2;
 476         int resolution;
 477
 478         sr_spew("CONF? response '%s'.", g_match_info_get_string(match));
 479         devc = sdi->priv;
 480
 481         devc->mode_squarewave = 0;
 482
 483         rstr = g_match_info_fetch(match, 4);
 484         if (rstr && sr_atoi(rstr, &resolution) == SR_OK) {
 485                 devc->cur_digits = -resolution;
 486                 devc->cur_encoding = -resolution + 1;
 487         }
 488         g_free(rstr);
 489
 490         mstr = g_match_info_fetch(match, 1);
 491         if (!strncmp(mstr, "VOLT", 4)) {
 492                 devc->cur_mq = SR_MQ_VOLTAGE;
 493                 devc->cur_unit = SR_UNIT_VOLT;
 494                 devc->cur_mqflags = 0;
 495                 devc->cur_exponent = 0;
 496                 if (mstr[4] == ':') {
 497                         if (!strncmp(mstr + 5, "ACDC", 4)) {
 498                                 /* AC + DC offset */
 499                                 devc->cur_mqflags |= SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS;
 500                         } else if (!strncmp(mstr + 5, "AC", 2)) {
 501                                 devc->cur_mqflags |= SR_MQFLAG_AC | SR_MQFLAG_RMS;
 502                         } else if (!strncmp(mstr + 5, "DC", 2)) {
 503                                 devc->cur_mqflags |= SR_MQFLAG_DC;
 504                         }
 505                 } else
 506                         devc->cur_mqflags |= SR_MQFLAG_DC;
 507         } else if (!strncmp(mstr, "CURR", 4)) {
 508                 devc->cur_mq = SR_MQ_CURRENT;
 509                 devc->cur_unit = SR_UNIT_AMPERE;
 510                 devc->cur_mqflags = 0;
 511                 devc->cur_exponent = 0;
 512                 if (mstr[4] == ':') {
 513                         if (!strncmp(mstr + 5, "ACDC", 4)) {
 514                                 /* AC + DC offset */
 515                                 devc->cur_mqflags |= SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS;
 516                         } else if (!strncmp(mstr + 5, "AC", 2)) {
 517                                 devc->cur_mqflags |= SR_MQFLAG_AC | SR_MQFLAG_RMS;
 518                         } else if (!strncmp(mstr + 5, "DC", 2)) {
 519                                 devc->cur_mqflags |= SR_MQFLAG_DC;
 520                         }
 521                 } else
 522                         devc->cur_mqflags |= SR_MQFLAG_DC;
 523         } else if (!strcmp(mstr, "RES")) {
 524                 devc->cur_mq = SR_MQ_RESISTANCE;
 525                 devc->cur_unit = SR_UNIT_OHM;
 526                 devc->cur_mqflags = 0;
 527                 devc->cur_exponent = 0;
 528         } else if (!strcmp(mstr, "COND")) {
 529                 devc->cur_mq = SR_MQ_CONDUCTANCE;
 530                 devc->cur_unit = SR_UNIT_SIEMENS;
 531                 devc->cur_mqflags = 0;
 532                 devc->cur_exponent = 0;
 533         } else if (!strcmp(mstr, "CAP")) {
 534                 devc->cur_mq = SR_MQ_CAPACITANCE;
 535                 devc->cur_unit = SR_UNIT_FARAD;
 536                 devc->cur_mqflags = 0;
 537                 devc->cur_exponent = 0;
 538         } else if (!strncmp(mstr, "FREQ", 4) || !strncmp(mstr, "FC1", 3)) {
 539                 devc->cur_mq = SR_MQ_FREQUENCY;
 540                 devc->cur_unit = SR_UNIT_HERTZ;
 541                 devc->cur_mqflags = 0;
 542                 devc->cur_exponent = 0;
 543         } else if (!strcmp(mstr, "CONT")) {
 544                 devc->cur_mq = SR_MQ_CONTINUITY;
 545                 devc->cur_unit = SR_UNIT_BOOLEAN;
 546                 devc->cur_mqflags = 0;
 547                 devc->cur_exponent = 0;
 548         } else if (!strcmp(mstr, "DIOD")) {
 549                 devc->cur_mq = SR_MQ_VOLTAGE;
 550                 devc->cur_unit = SR_UNIT_VOLT;
 551                 devc->cur_mqflags = SR_MQFLAG_DIODE;
 552                 devc->cur_exponent = 0;
 553                 devc->cur_digits = 4;
 554                 devc->cur_encoding = 5;
 555         } else if (!strncmp(mstr, "T1", 2) || !strncmp(mstr, "T2", 2) ||
 556                    !strncmp(mstr, "TEMP", 2)) {
 557                 devc->cur_mq = SR_MQ_TEMPERATURE;
 558                 m2 = g_match_info_fetch(match, 2);
 559                 if (!strcmp(m2, "FAR"))
 560                         devc->cur_unit = SR_UNIT_FAHRENHEIT;
 561                 else
 562                         devc->cur_unit = SR_UNIT_CELSIUS;
 563                 g_free(m2);
 564                 devc->cur_mqflags = 0;
 565                 devc->cur_exponent = 0;
 566                 devc->cur_digits = 1;
 567                 devc->cur_encoding = 2;
 568         } else if (!strcmp(mstr, "SCOU")) {
 569                 /*
 570                  * Switch counter, not supported. Not sure what values
 571                  * come from FETC in this mode, or how they would map
 572                  * into libsigrok.
 573                  */
 574         } else if (!strncmp(mstr, "CPER:", 5)) {
 575                 devc->cur_mq = SR_MQ_CURRENT;
 576                 devc->cur_unit = SR_UNIT_PERCENTAGE;
 577                 devc->cur_mqflags = 0;
 578                 devc->cur_exponent = 0;
 579                 devc->cur_digits = 2;
 580                 devc->cur_encoding = 3;
 581         } else if (!strcmp(mstr, "SQU")) {
 582                 /*
 583                  * Square wave output, not supported. FETC just return
 584                  * an error in this mode, so don't even call it.
 585                  */
 586                 devc->mode_squarewave = 1;
 587         } else {
 588                 sr_dbg("Unknown first argument '%s'.", mstr);
 589         }
 590         g_free(mstr);
 591
 592         return SR_OK;
 593 }
 594
 595 /* This comes in whenever the rotary switch is changed to a new position.
 596  * We could use it to determine the major measurement mode, but we already
 597  * have the output of CONF? for that, which is more detailed. However
 598  * we do need to catch this here, or it'll show up in some other output. */
 599 static int recv_switch(const struct sr_dev_inst *sdi, GMatchInfo *match)
 600 {
 601         (void)sdi;
 602
 603         sr_spew("Switch '%s'.", g_match_info_get_string(match));
 604
 605         return SR_OK;
 606 }
 607
 608 /* Poll keys/switches and values at 7Hz, mode at 1Hz. */
 609 SR_PRIV const struct agdmm_job agdmm_jobs_u12xx[] = {
 610         { 143, send_stat },
 611         { 1000, send_conf },
 612         { 143, send_fetc },
 613         ALL_ZERO
 614 };
 615
 616 SR_PRIV const struct agdmm_recv agdmm_recvs_u123x[] = {
 617         { "^\"(\\d\\d.{18}\\d)\"$", recv_stat_u123x },
 618         { "^\\*([0-9])$", recv_switch },
 619         { "^([-+][0-9]\\.[0-9]{8}E[-+][0-9]{2})$", recv_fetc },
 620         { "^\"(V|MV|A|UA|FREQ),(\\d),(AC|DC)\"$", recv_conf_u123x },
 621         { "^\"(RES|CAP),(\\d)\"$", recv_conf_u123x},
 622         { "^\"(DIOD)\"$", recv_conf_u123x },
 623         ALL_ZERO
 624 };
 625
 626 SR_PRIV const struct agdmm_recv agdmm_recvs_u124x[] = {
 627         { "^\"(\\d\\d.{18}\\d)\"$", recv_stat_u124x },
 628         { "^\\*([0-9])$", recv_switch },
 629         { "^([-+][0-9]\\.[0-9]{8}E[-+][0-9]{2})$", recv_fetc },
 630         { "^\"(VOLT|CURR|RES|CAP|FREQ) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 631         { "^\"(VOLT:[ACD]+) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 632         { "^\"(CURR:[ACD]+) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 633         { "^\"(CPER:[40]-20mA) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 634         { "^\"(T[0-9]:[A-Z]+) ([A-Z]+)\"$", recv_conf_u124x_5x },
 635         { "^\"(DIOD)\"$", recv_conf_u124x_5x },
 636         ALL_ZERO
 637 };
 638
 639 SR_PRIV const struct agdmm_recv agdmm_recvs_u125x[] = {
 640         { "^\"(\\d\\d.{18}\\d)\"$", recv_stat_u125x },
 641         { "^\\*([0-9])$", recv_switch },
 642         { "^([-+][0-9]\\.[0-9]{8}E[-+][0-9]{2})$", recv_fetc },
 643         { "^\"(VOLT|CURR|RES|CAP|FREQ) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 644         { "^\"(VOLT:[ACD]+) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 645         { "^\"(CURR:[ACD]+) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 646         { "^\"(CPER:[40]-20mA) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 647         { "^\"(T[0-9]:[A-Z]+) ([A-Z]+)\"$", recv_conf_u124x_5x },
 648         { "^\"(DIOD)\"$", recv_conf_u124x_5x },
 649         ALL_ZERO
 650 };
 651
 652 SR_PRIV const struct agdmm_recv agdmm_recvs_u128x[] = {
 653         { "^\"(\\d\\d.{18}\\d)\"$", recv_stat_u128x },
 654         { "^\\*([0-9])$", recv_switch },
 655         { "^([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))$", recv_fetc },
 656         { "^\"(VOLT|CURR|RES|COND|CAP|FREQ|FC1|FC100) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 657         { "^\"(VOLT:[ACD]+) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 658         { "^\"(CURR:[ACD]+) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 659         { "^\"(FREQ:[ACD]+) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 660         { "^\"(CPER:[40]-20mA) ([-+][0-9\\.E\\-+]+),([-+][0-9]\\.[0-9]{8}E([-+][0-9]{2}))\"$", recv_conf_u124x_5x },
 661         { "^\"(TEMP:[A-Z]+) ([A-Z]+)\"$", recv_conf_u124x_5x },
 662         { "^\"(DIOD|SQU)\"$", recv_conf_u124x_5x },
 663         ALL_ZERO
 664 };