src/hardware/serial-dmm/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
   5  * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
   6  * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
   7  *
   8  * This program is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include <config.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <fcntl.h>
  26 #include <string.h>
  27 #include <glib.h>
  28 #include <libsigrok/libsigrok.h>
  29 #include "libsigrok-internal.h"
  30 #include "protocol.h"
  31
  32 static const uint32_t scanopts[] = {
  33         SR_CONF_CONN,
  34         SR_CONF_SERIALCOMM,
  35 };
  36
  37 static const uint32_t drvopts[] = {
  38         SR_CONF_MULTIMETER,
  39 };
  40
  41 static const uint32_t devopts[] = {
  42         SR_CONF_CONTINUOUS,
  43         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  44         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
  45 };
  46
  47 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  48 {
  49         struct dmm_info *dmm;
  50         struct sr_config *src;
  51         GSList *l, *devices;
  52         const char *conn, *serialcomm;
  53         struct sr_dev_inst *sdi;
  54         struct dev_context *devc;
  55         struct sr_serial_dev_inst *serial;
  56         int dropped, ret;
  57         size_t len;
  58         uint8_t buf[128];
  59         size_t ch_idx;
  60         char ch_name[12];
  61
  62         dmm = (struct dmm_info *)di;
  63
  64         conn = dmm->conn;
  65         serialcomm = dmm->serialcomm;
  66         for (l = options; l; l = l->next) {
  67                 src = l->data;
  68                 switch (src->key) {
  69                 case SR_CONF_CONN:
  70                         conn = g_variant_get_string(src->data, NULL);
  71                         break;
  72                 case SR_CONF_SERIALCOMM:
  73                         serialcomm = g_variant_get_string(src->data, NULL);
  74                         break;
  75                 }
  76         }
  77         if (!conn)
  78                 return NULL;
  79
  80         serial = sr_serial_dev_inst_new(conn, serialcomm);
  81
  82         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
  83                 return NULL;
  84
  85         sr_info("Probing serial port %s.", conn);
  86
  87         devices = NULL;
  88         serial_flush(serial);
  89
  90         /* Request a packet if the DMM requires this. */
  91         if (dmm->packet_request) {
  92                 if ((ret = dmm->packet_request(serial)) < 0) {
  93                         sr_err("Failed to request packet: %d.", ret);
  94                         return FALSE;
  95                 }
  96         }
  97
  98         /*
  99          * There's no way to get an ID from the multimeter. It just sends data
 100          * periodically (or upon request), so the best we can do is check if
 101          * the packets match the expected format.
 102          */
 103
 104         /* Let's get a bit of data and see if we can find a packet. */
 105         len = sizeof(buf);
 106         ret = serial_stream_detect(serial, buf, &len, dmm->packet_size,
 107                                    dmm->packet_valid, 3000);
 108         if (ret != SR_OK)
 109                 goto scan_cleanup;
 110
 111         /*
 112          * If we dropped more than two packets worth of data, something is
 113          * wrong. We shouldn't quit however, since the dropped bytes might be
 114          * just zeroes at the beginning of the stream. Those can occur as a
 115          * combination of the nonstandard cable that ships with some devices
 116          * and the serial port or USB to serial adapter.
 117          */
 118         dropped = len - dmm->packet_size;
 119         if (dropped > 2 * dmm->packet_size)
 120                 sr_warn("Had to drop too much data.");
 121
 122         sr_info("Found device on port %s.", conn);
 123
 124         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 125         sdi->status = SR_ST_INACTIVE;
 126         sdi->vendor = g_strdup(dmm->vendor);
 127         sdi->model = g_strdup(dmm->device);
 128         devc = g_malloc0(sizeof(struct dev_context));
 129         sr_sw_limits_init(&devc->limits);
 130         sdi->inst_type = SR_INST_SERIAL;
 131         sdi->conn = serial;
 132         sdi->priv = devc;
 133         dmm->channel_count = 1;
 134         if (dmm->packet_parse == sr_eev121gw_3displays_parse) {
 135                 dmm->channel_count = EEV121GW_DISPLAY_COUNT;
 136                 dmm->channel_formats = eev121gw_channel_formats;
 137         }
 138         if (dmm->packet_parse == sr_metex14_4packets_parse)
 139                 dmm->channel_count = 4;
 140         if (dmm->packet_parse == sr_ms2115b_parse) {
 141                 dmm->channel_count = MS2115B_DISPLAY_COUNT;
 142                 dmm->channel_formats = ms2115b_channel_formats;
 143         }
 144         for (ch_idx = 0; ch_idx < dmm->channel_count; ch_idx++) {
 145                 size_t ch_num;
 146                 const char *fmt;
 147                 fmt = "P%zu";
 148                 if (dmm->channel_formats && dmm->channel_formats[ch_idx])
 149                         fmt = dmm->channel_formats[ch_idx];
 150                 ch_num = ch_idx + 1;
 151                 snprintf(ch_name, sizeof(ch_name), fmt, ch_num);
 152                 sr_channel_new(sdi, ch_idx, SR_CHANNEL_ANALOG, TRUE, ch_name);
 153         }
 154         devices = g_slist_append(devices, sdi);
 155
 156 scan_cleanup:
 157         serial_close(serial);
 158
 159         return std_scan_complete(di, devices);
 160 }
 161
 162 static int config_set(uint32_t key, GVariant *data,
 163         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 164 {
 165         struct dev_context *devc;
 166
 167         (void)cg;
 168
 169         devc = sdi->priv;
 170
 171         return sr_sw_limits_config_set(&devc->limits, key, data);
 172 }
 173
 174 static int config_list(uint32_t key, GVariant **data,
 175         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 176 {
 177         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 178 }
 179
 180 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 181 {
 182         struct dev_context *devc;
 183         struct sr_serial_dev_inst *serial;
 184
 185         devc = sdi->priv;
 186
 187         sr_sw_limits_acquisition_start(&devc->limits);
 188         std_session_send_df_header(sdi);
 189
 190         serial = sdi->conn;
 191         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 192                       receive_data, (void *)sdi);
 193
 194         return SR_OK;
 195 }
 196
 197 #define DMM_CONN(ID, CHIPSET, VENDOR, MODEL, \
 198                 CONN, SERIALCOMM, PACKETSIZE, TIMEOUT, DELAY, \
 199                 REQUEST, VALID, PARSE, DETAILS) \
 200         &((struct dmm_info) { \
 201                 { \
 202                         .name = ID, \
 203                         .longname = VENDOR " " MODEL, \
 204                         .api_version = 1, \
 205                         .init = std_init, \
 206                         .cleanup = std_cleanup, \
 207                         .scan = scan, \
 208                         .dev_list = std_dev_list, \
 209                         .dev_clear = std_dev_clear, \
 210                         .config_get = NULL, \
 211                         .config_set = config_set, \
 212                         .config_list = config_list, \
 213                         .dev_open = std_serial_dev_open, \
 214                         .dev_close = std_serial_dev_close, \
 215                         .dev_acquisition_start = dev_acquisition_start, \
 216                         .dev_acquisition_stop = std_serial_dev_acquisition_stop, \
 217                         .context = NULL, \
 218                 }, \
 219                 VENDOR, MODEL, CONN, SERIALCOMM, PACKETSIZE, TIMEOUT, DELAY, \
 220                 REQUEST, 1, NULL, VALID, PARSE, DETAILS, sizeof(struct CHIPSET##_info) \
 221         }).di
 222
 223 #define DMM(ID, CHIPSET, VENDOR, MODEL, SERIALCOMM, PACKETSIZE, TIMEOUT, \
 224                 DELAY, REQUEST, VALID, PARSE, DETAILS) \
 225         DMM_CONN(ID, CHIPSET, VENDOR, MODEL, NULL, SERIALCOMM, PACKETSIZE, \
 226                 TIMEOUT, DELAY, REQUEST, VALID, PARSE, DETAILS)
 227
 228 SR_REGISTER_DEV_DRIVER_LIST(serial_dmm_drivers,
 229         /*
 230          * The items are sorted by chipset first and then model name.
 231          *
 232          * This reflects the developer's perspective and is preferrable
 233          * during maintenance, as a vendor/product based sort order does
 234          * not work well for rebranded models, and from a support point
 235          * of view it's more important to identify similarities between
 236          * models and compatible devices.
 237          *
 238          * Fold marks {{{ }}} with matching braces were added, to further
 239          * speed up navigation in the long list.
 240          */
 241         /* asycii based meters {{{ */
 242         DMM(
 243                 "metrix-mx56c", asycii, "Metrix", "MX56C",
 244                 "2400/8n1", ASYCII_PACKET_SIZE, 0, 0, NULL,
 245                 sr_asycii_packet_valid, sr_asycii_parse, NULL
 246         ),
 247         /* }}} */
 248         /* bm25x based meters {{{ */
 249         DMM(
 250                 "brymen-bm25x", bm25x,
 251                 "Brymen", "BM25x", "9600/8n1/rts=1/dtr=1",
 252                 BRYMEN_BM25X_PACKET_SIZE, 0, 0, NULL,
 253                 sr_brymen_bm25x_packet_valid, sr_brymen_bm25x_parse,
 254                 NULL
 255         ),
 256         /* }}} */
 257         /* dtm0660 based meters {{{ */
 258         DMM(
 259                 "peaktech-3415", dtm0660,
 260                 "PeakTech", "3415", "2400/8n1/rts=0/dtr=1",
 261                 DTM0660_PACKET_SIZE, 0, 0, NULL,
 262                 sr_dtm0660_packet_valid, sr_dtm0660_parse, NULL
 263         ),
 264         DMM(
 265                 "velleman-dvm4100", dtm0660,
 266                 "Velleman", "DVM4100", "2400/8n1/rts=0/dtr=1",
 267                 DTM0660_PACKET_SIZE, 0, 0, NULL,
 268                 sr_dtm0660_packet_valid, sr_dtm0660_parse, NULL
 269         ),
 270         /* }}} */
 271         /* eev121gw based meters {{{ */
 272         DMM(
 273                 "eevblog-121gw", eev121gw, "EEVblog", "121GW",
 274                 "115200/8n1", EEV121GW_PACKET_SIZE, 0, 0, NULL,
 275                 sr_eev121gw_packet_valid, sr_eev121gw_3displays_parse, NULL
 276         ),
 277         /* }}} */
 278         /* es519xx based meters {{{ */
 279         DMM(
 280                 "iso-tech-idm103n", es519xx,
 281                 "ISO-TECH", "IDM103N", "2400/7o1/rts=0/dtr=1",
 282                 ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 283                 sr_es519xx_2400_11b_packet_valid, sr_es519xx_2400_11b_parse,
 284                 NULL
 285         ),
 286         /*
 287          * Note: ES51922 and ES51986 baudrate is actually 19230. This is
 288          * "out" by .15%, and so is well within the typical 1% margin
 289          * that is considered acceptable in UART communication, and thus
 290          * should not cause an issue.
 291          *
 292          * However, using 19230 as baudrate here will not work, as most DMM
 293          * cables do not support that baudrate!
 294          */
 295         DMM(
 296                 "tenma-72-7750-ser", es519xx,
 297                 "Tenma", "72-7750 (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 298                 ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 299                 sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
 300                 NULL
 301         ),
 302         DMM(
 303                 "uni-t-ut60g-ser", es519xx,
 304                 "UNI-T", "UT60G (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 305                 ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 306                 sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
 307                 NULL
 308         ),
 309         DMM(
 310                 "uni-t-ut61e-ser", es519xx,
 311                 "UNI-T", "UT61E (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 312                 ES519XX_14B_PACKET_SIZE, 0, 0, NULL,
 313                 sr_es519xx_19200_14b_packet_valid, sr_es519xx_19200_14b_parse,
 314                 NULL
 315         ),
 316         /* }}} */
 317         /* fs9721 based meters {{{ */
 318         DMM(
 319                 "digitek-dt4000zc", fs9721,
 320                 "Digitek", "DT4000ZC", "2400/8n1/dtr=1",
 321                 FS9721_PACKET_SIZE, 0, 0, NULL,
 322                 sr_fs9721_packet_valid, sr_fs9721_parse,
 323                 sr_fs9721_10_temp_c
 324         ),
 325         DMM(
 326                 "mastech-ms8250b", fs9721,
 327                 "MASTECH", "MS8250B", "2400/8n1/rts=0/dtr=1",
 328                 FS9721_PACKET_SIZE, 0, 0, NULL,
 329                 sr_fs9721_packet_valid, sr_fs9721_parse,
 330                 NULL
 331         ),
 332         DMM(
 333                 "pce-pce-dm32", fs9721,
 334                 "PCE", "PCE-DM32", "2400/8n1",
 335                 FS9721_PACKET_SIZE, 0, 0, NULL,
 336                 sr_fs9721_packet_valid, sr_fs9721_parse,
 337                 sr_fs9721_01_10_temp_f_c
 338         ),
 339         DMM(
 340                 "peaktech-3330", fs9721,
 341                 "PeakTech", "3330", "2400/8n1/dtr=1",
 342                 FS9721_PACKET_SIZE, 0, 0, NULL,
 343                 sr_fs9721_packet_valid, sr_fs9721_parse,
 344                 sr_fs9721_01_10_temp_f_c
 345         ),
 346         DMM(
 347                 "tecpel-dmm-8061-ser", fs9721,
 348                 "Tecpel", "DMM-8061 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 349                 FS9721_PACKET_SIZE, 0, 0, NULL,
 350                 sr_fs9721_packet_valid, sr_fs9721_parse,
 351                 sr_fs9721_00_temp_c
 352         ),
 353         DMM(
 354                 "tekpower-tp4000ZC", fs9721,
 355                 "TekPower", "TP4000ZC", "2400/8n1/dtr=1",
 356                 FS9721_PACKET_SIZE, 0, 0, NULL,
 357                 sr_fs9721_packet_valid, sr_fs9721_parse,
 358                 sr_fs9721_10_temp_c
 359         ),
 360         DMM(
 361                 "tenma-72-7745-ser", fs9721,
 362                 "Tenma", "72-7745 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 363                 FS9721_PACKET_SIZE, 0, 0, NULL,
 364                 sr_fs9721_packet_valid, sr_fs9721_parse,
 365                 sr_fs9721_00_temp_c
 366         ),
 367         DMM(
 368                 "uni-t-ut60a-ser", fs9721,
 369                 "UNI-T", "UT60A (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 370                 FS9721_PACKET_SIZE, 0, 0, NULL,
 371                 sr_fs9721_packet_valid, sr_fs9721_parse,
 372                 NULL
 373         ),
 374         DMM(
 375                 "uni-t-ut60e-ser", fs9721,
 376                 "UNI-T", "UT60E (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 377                 FS9721_PACKET_SIZE, 0, 0, NULL,
 378                 sr_fs9721_packet_valid, sr_fs9721_parse,
 379                 sr_fs9721_00_temp_c
 380         ),
 381         DMM(
 382                 "va-va18b", fs9721,
 383                 "V&A", "VA18B", "2400/8n1",
 384                 FS9721_PACKET_SIZE, 0, 0, NULL,
 385                 sr_fs9721_packet_valid, sr_fs9721_parse,
 386                 sr_fs9721_01_temp_c
 387         ),
 388         DMM(
 389                 "va-va40b", fs9721,
 390                 "V&A", "VA40B", "2400/8n1",
 391                 FS9721_PACKET_SIZE, 0, 0, NULL,
 392                 sr_fs9721_packet_valid, sr_fs9721_parse,
 393                 sr_fs9721_max_c_min
 394         ),
 395         DMM(
 396                 "voltcraft-vc820-ser", fs9721,
 397                 "Voltcraft", "VC-820 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 398                 FS9721_PACKET_SIZE, 0, 0, NULL,
 399                 sr_fs9721_packet_valid, sr_fs9721_parse,
 400                 NULL
 401         ),
 402         DMM(
 403                 "voltcraft-vc840-ser", fs9721,
 404                 "Voltcraft", "VC-840 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 405                 FS9721_PACKET_SIZE, 0, 0, NULL,
 406                 sr_fs9721_packet_valid, sr_fs9721_parse,
 407                 sr_fs9721_00_temp_c
 408         ),
 409         /* }}} */
 410         /* fs9922 based meters {{{ */
 411         DMM(
 412                 "sparkfun-70c", fs9922,
 413                 "SparkFun", "70C", "2400/8n1/rts=0/dtr=1",
 414                 FS9922_PACKET_SIZE, 0, 0, NULL,
 415                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 416         ),
 417         DMM(
 418                 "uni-t-ut61b-ser", fs9922,
 419                 "UNI-T", "UT61B (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 420                 FS9922_PACKET_SIZE, 0, 0, NULL,
 421                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 422         ),
 423         DMM(
 424                 "uni-t-ut61c-ser", fs9922,
 425                 "UNI-T", "UT61C (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 426                 FS9922_PACKET_SIZE, 0, 0, NULL,
 427                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 428         ),
 429         DMM(
 430                 "uni-t-ut61d-ser", fs9922,
 431                 "UNI-T", "UT61D (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 432                 FS9922_PACKET_SIZE, 0, 0, NULL,
 433                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 434         ),
 435         DMM(
 436                 "victor-dmm-ser", fs9922,
 437                 "Victor", "Victor DMMs (Mini-USB cable)", "2400/8n1",
 438                 FS9922_PACKET_SIZE, 0, 0, NULL,
 439                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 440         ),
 441         DMM(
 442                 /*
 443                  * Note: The VC830 doesn't set the 'volt' and 'diode' bits of
 444                  * the FS9922 protocol. Instead, it only sets the user-defined
 445                  * bit "z1" to indicate "diode mode" and "voltage".
 446                  */
 447                 "voltcraft-vc830-ser", fs9922,
 448                 "Voltcraft", "VC-830 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 449                 FS9922_PACKET_SIZE, 0, 0, NULL,
 450                 sr_fs9922_packet_valid, sr_fs9922_parse,
 451                 &sr_fs9922_z1_diode
 452         ),
 453         /* }}} */
 454         /* m2110 based meters {{{ */
 455         DMM(
 456                 "bbcgm-2010", m2110,
 457                 "BBC Goertz Metrawatt", "M2110", "1200/7n2",
 458                 BBCGM_M2110_PACKET_SIZE, 0, 0, NULL,
 459                 sr_m2110_packet_valid, sr_m2110_parse,
 460                 NULL
 461         ),
 462         /* }}} */
 463         /* ms2115b based meters {{{ */
 464         DMM(
 465                 "mastech-ms2115b", ms2115b,
 466                 "MASTECH", "MS2115B", "1200/8n1",
 467                 MS2115B_PACKET_SIZE, 0, 0, NULL,
 468                 sr_ms2115b_packet_valid, sr_ms2115b_parse,
 469                 NULL
 470         ),
 471         /* }}} */
 472         /* ms8250d based meters {{{ */
 473         DMM(
 474                 "mastech-ms8250d", ms8250d,
 475                 "MASTECH", "MS8250D", "2400/8n1/rts=0/dtr=1",
 476                 MS8250D_PACKET_SIZE, 0, 0, NULL,
 477                 sr_ms8250d_packet_valid, sr_ms8250d_parse,
 478                 NULL
 479         ),
 480         /* }}} */
 481         /* metex14 based meters {{{ */
 482         DMM(
 483                 "mastech-mas345", metex14,
 484                 "MASTECH", "MAS345", "600/7n2/rts=0/dtr=1",
 485                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 486                 sr_metex14_packet_valid, sr_metex14_parse,
 487                 NULL
 488         ),
 489         DMM(
 490                 "metex-m3640d", metex14,
 491                 "Metex", "M-3640D", "1200/7n2/rts=0/dtr=1",
 492                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 493                 sr_metex14_packet_valid, sr_metex14_parse,
 494                 NULL
 495         ),
 496         DMM(
 497                 "metex-m3860m", metex14,
 498                 "Metex", "M-3860M", "9600/7n2/rts=0/dtr=1",
 499                 4 * METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 500                 sr_metex14_4packets_valid, sr_metex14_4packets_parse,
 501                 NULL
 502         ),
 503         DMM(
 504                 "metex-m4650cr", metex14,
 505                 "Metex", "M-4650CR", "1200/7n2/rts=0/dtr=1",
 506                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 507                 sr_metex14_packet_valid, sr_metex14_parse,
 508                 NULL
 509         ),
 510         DMM(
 511                 "metex-me31", metex14,
 512                 "Metex", "ME-31", "600/7n2/rts=0/dtr=1",
 513                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 514                 sr_metex14_packet_valid, sr_metex14_parse,
 515                 NULL
 516         ),
 517         DMM(
 518                 "peaktech-3410", metex14,
 519                 "PeakTech", "3410", "600/7n2/rts=0/dtr=1",
 520                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 521                 sr_metex14_packet_valid, sr_metex14_parse,
 522                 NULL
 523         ),
 524         DMM(
 525                 "peaktech-4370", metex14,
 526                 "PeakTech", "4370", "1200/7n2/rts=0/dtr=1",
 527                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 528                 sr_metex14_packet_valid, sr_metex14_parse,
 529                 NULL
 530         ),
 531         DMM(
 532                 "peaktech-4390a", metex14,
 533                 "PeakTech", "4390A", "9600/7n2/rts=0/dtr=1",
 534                 4 * METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 535                 sr_metex14_4packets_valid, sr_metex14_4packets_parse,
 536                 NULL
 537         ),
 538         DMM(
 539                 "radioshack-22-168", metex14,
 540                 "RadioShack", "22-168", "1200/7n2/rts=0/dtr=1",
 541                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 542                 sr_metex14_packet_valid, sr_metex14_parse,
 543                 NULL
 544         ),
 545         DMM(
 546                 "radioshack-22-805", metex14,
 547                 "RadioShack", "22-805", "600/7n2/rts=0/dtr=1",
 548                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 549                 sr_metex14_packet_valid, sr_metex14_parse,
 550                 NULL
 551         ),
 552         DMM(
 553                 "voltcraft-m3650cr", metex14,
 554                 "Voltcraft", "M-3650CR", "1200/7n2/rts=0/dtr=1",
 555                 METEX14_PACKET_SIZE, 150, 20, sr_metex14_packet_request,
 556                 sr_metex14_packet_valid, sr_metex14_parse,
 557                 NULL
 558         ),
 559         DMM(
 560                 "voltcraft-m3650d", metex14,
 561                 "Voltcraft", "M-3650D", "1200/7n2/rts=0/dtr=1",
 562                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 563                 sr_metex14_packet_valid, sr_metex14_parse,
 564                 NULL
 565         ),
 566         DMM(
 567                 "voltcraft-m4650cr", metex14,
 568                 "Voltcraft", "M-4650CR", "1200/7n2/rts=0/dtr=1",
 569                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 570                 sr_metex14_packet_valid, sr_metex14_parse,
 571                 NULL
 572         ),
 573         DMM(
 574                 "voltcraft-me42", metex14,
 575                 "Voltcraft", "ME-42", "600/7n2/rts=0/dtr=1",
 576                 METEX14_PACKET_SIZE, 250, 60, sr_metex14_packet_request,
 577                 sr_metex14_packet_valid, sr_metex14_parse,
 578                 NULL
 579         ),
 580         /* }}} */
 581         /* rs9lcd based meters {{{ */
 582         DMM(
 583                 "radioshack-22-812", rs9lcd,
 584                 "RadioShack", "22-812", "4800/8n1/rts=0/dtr=1",
 585                 RS9LCD_PACKET_SIZE, 0, 0, NULL,
 586                 sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
 587                 NULL
 588         ),
 589         /* }}} */
 590         /* ut71x based meters {{{ */
 591         DMM(
 592                 "tenma-72-7730-ser", ut71x,
 593                 "Tenma", "72-7730 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 594                 UT71X_PACKET_SIZE, 0, 0, NULL,
 595                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 596         ),
 597         DMM(
 598                 "tenma-72-7732-ser", ut71x,
 599                 "Tenma", "72-7732 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 600                 UT71X_PACKET_SIZE, 0, 0, NULL,
 601                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 602         ),
 603         DMM(
 604                 "tenma-72-9380a-ser", ut71x,
 605                 "Tenma", "72-9380A (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 606                 UT71X_PACKET_SIZE, 0, 0, NULL,
 607                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 608         ),
 609         DMM(
 610                 "uni-t-ut71a-ser", ut71x,
 611                 "UNI-T", "UT71A (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 612                 UT71X_PACKET_SIZE, 0, 0, NULL,
 613                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 614         ),
 615         DMM(
 616                 "uni-t-ut71b-ser", ut71x,
 617                 "UNI-T", "UT71B (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 618                 UT71X_PACKET_SIZE, 0, 0, NULL,
 619                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 620         ),
 621         DMM(
 622                 "uni-t-ut71c-ser", ut71x,
 623                 "UNI-T", "UT71C (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 624                 UT71X_PACKET_SIZE, 0, 0, NULL,
 625                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 626         ),
 627         DMM(
 628                 "uni-t-ut71d-ser", ut71x,
 629                 "UNI-T", "UT71D (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 630                 UT71X_PACKET_SIZE, 0, 0, NULL,
 631                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 632         ),
 633         DMM(
 634                 "uni-t-ut71e-ser", ut71x,
 635                 "UNI-T", "UT71E (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 636                 UT71X_PACKET_SIZE, 0, 0, NULL,
 637                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 638         ),
 639         DMM(
 640                 "voltcraft-vc920-ser", ut71x,
 641                 "Voltcraft", "VC-920 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 642                 UT71X_PACKET_SIZE, 0, 0, NULL,
 643                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 644         ),
 645         DMM(
 646                 "voltcraft-vc940-ser", ut71x,
 647                 "Voltcraft", "VC-940 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 648                 UT71X_PACKET_SIZE, 0, 0, NULL,
 649                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 650         ),
 651         DMM(
 652                 "voltcraft-vc960-ser", ut71x,
 653                 "Voltcraft", "VC-960 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 654                 UT71X_PACKET_SIZE, 0, 0, NULL,
 655                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 656         ),
 657         /* }}} */
 658         /* vc870 based meters {{{ */
 659         DMM(
 660                 "voltcraft-vc870-ser", vc870,
 661                 "Voltcraft", "VC-870 (UT-D02 cable)", "9600/8n1/rts=0/dtr=1",
 662                 VC870_PACKET_SIZE, 0, 0, NULL,
 663                 sr_vc870_packet_valid, sr_vc870_parse, NULL
 664         ),
 665         /* }}} */
 666         /* vc96 based meters {{{ */
 667         DMM(
 668                 "voltcraft-vc96", vc96,
 669                 "Voltcraft", "VC-96", "1200/8n2",
 670                 VC96_PACKET_SIZE, 0, 0, NULL,
 671                 sr_vc96_packet_valid, sr_vc96_parse,
 672                 NULL
 673         ),
 674         /* }}} */
 675         /*
 676          * The list is sorted. Add new items in the respective chip's group.
 677          */
 678 );