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_GET | SR_CONF_SET,
  44         SR_CONF_LIMIT_MSEC | SR_CONF_GET | 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 ret;
  57         size_t dropped, len, packet_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         sr_info("Probing serial port %s.", conn);
  85
  86         if (dmm->after_open) {
  87                 ret = dmm->after_open(serial);
  88                 if (ret != SR_OK) {
  89                         sr_err("Activity after port open failed: %d.", ret);
  90                         return NULL;
  91                 }
  92         }
  93
  94         devices = NULL;
  95
  96         /* Request a packet if the DMM requires this. */
  97         if (dmm->packet_request) {
  98                 if ((ret = dmm->packet_request(serial)) < 0) {
  99                         sr_err("Failed to request packet: %d.", ret);
 100                         return NULL;
 101                 }
 102         }
 103
 104         /*
 105          * There's no way to get an ID from the multimeter. It just sends data
 106          * periodically (or upon request), so the best we can do is check if
 107          * the packets match the expected format.
 108          *
 109          * If we dropped more than two packets worth of data, something is
 110          * wrong. We shouldn't quit however, since the dropped bytes might be
 111          * just zeroes at the beginning of the stream. Those can occur as a
 112          * combination of the nonstandard cable that ships with some devices
 113          * and the serial port or USB to serial adapter.
 114          */
 115         len = sizeof(buf);
 116         ret = serial_stream_detect(serial, buf, &len, dmm->packet_size,
 117                 dmm->packet_valid, dmm->packet_valid_len, &packet_len, 3000);
 118         if (ret != SR_OK)
 119                 goto scan_cleanup;
 120         dropped = len - dmm->packet_size;
 121         if (dropped > 2 * packet_len)
 122                 sr_warn("Packet search dropped a lot of data.");
 123         sr_info("Found device on port %s.", conn);
 124
 125         /*
 126          * Setup optional additional callbacks when sub device drivers
 127          * happen to provide them. (This is a compromise to do it here,
 128          * and not extend the DMM_CONN() et al set of macros.)
 129          */
 130         if (strcmp(dmm->di.name, "brymen-bm52x") == 0) {
 131                 /* Applicable to BM520s but not to BM820s. */
 132                 dmm->dmm_state_init = brymen_bm52x_state_init;
 133                 dmm->dmm_state_free = brymen_bm52x_state_free;
 134                 dmm->config_get = brymen_bm52x_config_get;
 135                 dmm->config_set = brymen_bm52x_config_set;
 136                 dmm->config_list = brymen_bm52x_config_list;
 137                 dmm->acquire_start = brymen_bm52x_acquire_start;
 138         }
 139         if (dmm->dmm_state_init)
 140                 dmm->dmm_state = dmm->dmm_state_init();
 141
 142         /* Setup the device instance. */
 143         sdi = g_malloc0(sizeof(*sdi));
 144         sdi->status = SR_ST_INACTIVE;
 145         sdi->vendor = g_strdup(dmm->vendor);
 146         sdi->model = g_strdup(dmm->device);
 147         devc = g_malloc0(sizeof(*devc));
 148         sr_sw_limits_init(&devc->limits);
 149         sdi->inst_type = SR_INST_SERIAL;
 150         sdi->conn = serial;
 151         sdi->priv = devc;
 152
 153         /* Create (optionally device dependent) channel(s). */
 154         dmm->channel_count = 1;
 155         if (dmm->packet_parse == sr_brymen_bm52x_parse)
 156                 dmm->channel_count = BRYMEN_BM52X_DISPLAY_COUNT;
 157         if (dmm->packet_parse == sr_brymen_bm86x_parse)
 158                 dmm->channel_count = BRYMEN_BM86X_DISPLAY_COUNT;
 159         if (dmm->packet_parse == sr_eev121gw_3displays_parse) {
 160                 dmm->channel_count = EEV121GW_DISPLAY_COUNT;
 161                 dmm->channel_formats = eev121gw_channel_formats;
 162         }
 163         if (dmm->packet_parse == sr_metex14_4packets_parse)
 164                 dmm->channel_count = 4;
 165         if (dmm->packet_parse == sr_ms2115b_parse) {
 166                 dmm->channel_count = MS2115B_DISPLAY_COUNT;
 167                 dmm->channel_formats = ms2115b_channel_formats;
 168         }
 169         for (ch_idx = 0; ch_idx < dmm->channel_count; ch_idx++) {
 170                 size_t ch_num;
 171                 const char *fmt;
 172                 fmt = "P%zu";
 173                 if (dmm->channel_formats && dmm->channel_formats[ch_idx])
 174                         fmt = dmm->channel_formats[ch_idx];
 175                 ch_num = ch_idx + 1;
 176                 snprintf(ch_name, sizeof(ch_name), fmt, ch_num);
 177                 sr_channel_new(sdi, ch_idx, SR_CHANNEL_ANALOG, TRUE, ch_name);
 178         }
 179
 180         /* Add found device to result set. */
 181         devices = g_slist_append(devices, sdi);
 182
 183 scan_cleanup:
 184         serial_close(serial);
 185
 186         return std_scan_complete(di, devices);
 187 }
 188
 189 static int config_get(uint32_t key, GVariant **data,
 190         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 191 {
 192         struct dev_context *devc;
 193         struct dmm_info *dmm;
 194
 195         if (!sdi)
 196                 return SR_ERR_ARG;
 197         devc = sdi->priv;
 198
 199         switch (key) {
 200         case SR_CONF_LIMIT_SAMPLES:
 201         case SR_CONF_LIMIT_FRAMES:
 202         case SR_CONF_LIMIT_MSEC:
 203                 return sr_sw_limits_config_get(&devc->limits, key, data);
 204         default:
 205                 dmm = (struct dmm_info *)sdi->driver;
 206                 if (!dmm || !dmm->config_get)
 207                         return SR_ERR_NA;
 208                 return dmm->config_get(dmm->dmm_state, key, data, sdi, cg);
 209         }
 210         /* UNREACH */
 211 }
 212
 213 static int config_set(uint32_t key, GVariant *data,
 214         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 215 {
 216         struct dev_context *devc;
 217         struct dmm_info *dmm;
 218
 219         if (!sdi)
 220                 return SR_ERR_ARG;
 221         devc = sdi->priv;
 222         (void)cg;
 223
 224         switch (key) {
 225         case SR_CONF_LIMIT_SAMPLES:
 226         case SR_CONF_LIMIT_FRAMES:
 227         case SR_CONF_LIMIT_MSEC:
 228                 return sr_sw_limits_config_set(&devc->limits, key, data);
 229         default:
 230                 dmm = (struct dmm_info *)sdi->driver;
 231                 if (!dmm || !dmm->config_set)
 232                         return SR_ERR_NA;
 233                 return dmm->config_set(dmm->dmm_state, key, data, sdi, cg);
 234         }
 235 }
 236
 237 static int config_list(uint32_t key, GVariant **data,
 238         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 239 {
 240         struct dmm_info *dmm;
 241         int ret;
 242
 243         /* Use common logic for standard keys. */
 244         if (!sdi)
 245                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 246
 247         /*
 248          * Check for device specific config_list handler. ERR N/A from
 249          * that handler is non-fatal, just falls back to common logic.
 250          */
 251         dmm = (struct dmm_info *)sdi->driver;
 252         if (dmm && dmm->config_list) {
 253                 ret = dmm->config_list(dmm->dmm_state, key, data, sdi, cg);
 254                 if (ret != SR_ERR_NA)
 255                         return ret;
 256         }
 257
 258         return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 259 }
 260
 261 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 262 {
 263         struct dev_context *devc;
 264         struct dmm_info *dmm;
 265         sr_receive_data_callback cb_func;
 266         void *cb_data;
 267         int ret;
 268         struct sr_serial_dev_inst *serial;
 269
 270         devc = sdi->priv;
 271
 272         sr_sw_limits_acquisition_start(&devc->limits);
 273         std_session_send_df_header(sdi);
 274
 275         cb_func = receive_data;
 276         cb_data = (void *)sdi;
 277         dmm = (struct dmm_info *)sdi->driver;
 278         if (dmm && dmm->acquire_start) {
 279                 ret = dmm->acquire_start(dmm->dmm_state, sdi,
 280                         &cb_func, &cb_data);
 281                 if (ret < 0)
 282                         return ret;
 283         }
 284
 285         serial = sdi->conn;
 286         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 287                 cb_func, cb_data);
 288
 289         return SR_OK;
 290 }
 291
 292 #define DMM_ENTRY(ID, CHIPSET, VENDOR, MODEL, \
 293                 CONN, SERIALCOMM, PACKETSIZE, TIMEOUT, DELAY, \
 294                 OPEN, REQUEST, VALID, PARSE, DETAILS, \
 295                 INIT_STATE, FREE_STATE, VALID_LEN, PARSE_LEN, \
 296                 CFG_GET, CFG_SET, CFG_LIST, ACQ_START) \
 297         &((struct dmm_info) { \
 298                 { \
 299                         .name = ID, \
 300                         .longname = VENDOR " " MODEL, \
 301                         .api_version = 1, \
 302                         .init = std_init, \
 303                         .cleanup = std_cleanup, \
 304                         .scan = scan, \
 305                         .dev_list = std_dev_list, \
 306                         .dev_clear = std_dev_clear, \
 307                         .config_get = config_get, \
 308                         .config_set = config_set, \
 309                         .config_list = config_list, \
 310                         .dev_open = std_serial_dev_open, \
 311                         .dev_close = std_serial_dev_close, \
 312                         .dev_acquisition_start = dev_acquisition_start, \
 313                         .dev_acquisition_stop = std_serial_dev_acquisition_stop, \
 314                         .context = NULL, \
 315                 }, \
 316                 VENDOR, MODEL, CONN, SERIALCOMM, PACKETSIZE, TIMEOUT, DELAY, \
 317                 REQUEST, 1, NULL, VALID, PARSE, DETAILS, \
 318                 sizeof(struct CHIPSET##_info), \
 319                 NULL, INIT_STATE, FREE_STATE, \
 320                 OPEN, VALID_LEN, PARSE_LEN, \
 321                 CFG_GET, CFG_SET, CFG_LIST, ACQ_START, \
 322         }).di
 323
 324 #define DMM_CONN(ID, CHIPSET, VENDOR, MODEL, \
 325                 CONN, SERIALCOMM, PACKETSIZE, TIMEOUT, DELAY, \
 326                 REQUEST, VALID, PARSE, DETAILS) \
 327         DMM_ENTRY(ID, CHIPSET, VENDOR, MODEL, \
 328                 CONN, SERIALCOMM, PACKETSIZE, TIMEOUT, DELAY, \
 329                 NULL, REQUEST, VALID, PARSE, DETAILS, \
 330                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL)
 331
 332 #define DMM(ID, CHIPSET, VENDOR, MODEL, SERIALCOMM, PACKETSIZE, TIMEOUT, \
 333                 DELAY, REQUEST, VALID, PARSE, DETAILS) \
 334         DMM_CONN(ID, CHIPSET, VENDOR, MODEL, \
 335                 NULL, SERIALCOMM, PACKETSIZE, TIMEOUT, DELAY, \
 336                 REQUEST, VALID, PARSE, DETAILS)
 337
 338 #define DMM_LEN(ID, CHIPSET, VENDOR, MODEL, \
 339                 CONN, SERIALCOMM, PACKETSIZE, TIMEOUT, DELAY, \
 340                 INIT, FREE, OPEN, REQUEST, VALID, PARSE, DETAILS) \
 341         DMM_ENTRY(ID, CHIPSET, VENDOR, MODEL, \
 342                 CONN, SERIALCOMM, PACKETSIZE, TIMEOUT, DELAY, \
 343                 OPEN, REQUEST, NULL, NULL, DETAILS, \
 344                 INIT, FREE, VALID, PARSE, NULL, NULL, NULL, NULL)
 345
 346 SR_REGISTER_DEV_DRIVER_LIST(serial_dmm_drivers,
 347         /*
 348          * The items are sorted by chipset first and then model name.
 349          *
 350          * This reflects the developer's perspective and is preferrable
 351          * during maintenance, as a vendor/product based sort order does
 352          * not work well for rebranded models, and from a support point
 353          * of view it's more important to identify similarities between
 354          * models and compatible devices.
 355          *
 356          * Fold marks {{{ }}} with matching braces were added, to further
 357          * speed up navigation in the long list.
 358          */
 359         /* asycii based meters {{{ */
 360         DMM(
 361                 "metrix-mx56c", asycii, "Metrix", "MX56C",
 362                 "2400/8n1", ASYCII_PACKET_SIZE, 0, 0, NULL,
 363                 sr_asycii_packet_valid, sr_asycii_parse, NULL
 364         ),
 365         /* }}} */
 366         /* bm25x based meters {{{ */
 367         DMM(
 368                 "brymen-bm25x", bm25x,
 369                 "Brymen", "BM25x", "9600/8n1/rts=1/dtr=1",
 370                 BRYMEN_BM25X_PACKET_SIZE, 0, 0, NULL,
 371                 sr_brymen_bm25x_packet_valid, sr_brymen_bm25x_parse,
 372                 NULL
 373         ),
 374         /* }}} */
 375         /* bm52x based meters {{{ */
 376         DMM_CONN(
 377                 "brymen-bm52x", brymen_bm52x, "Brymen", "BM52x",
 378                 "hid/bu86x", NULL, BRYMEN_BM52X_PACKET_SIZE, 4000, 500,
 379                 sr_brymen_bm52x_packet_request,
 380                 sr_brymen_bm52x_packet_valid, sr_brymen_bm52x_parse,
 381                 NULL
 382         ),
 383         DMM_CONN(
 384                 "brymen-bm82x", brymen_bm52x, "Brymen", "BM82x",
 385                 "hid/bu86x", NULL, BRYMEN_BM52X_PACKET_SIZE, 4000, 500,
 386                 sr_brymen_bm82x_packet_request,
 387                 sr_brymen_bm82x_packet_valid, sr_brymen_bm52x_parse,
 388                 NULL
 389         ),
 390         /* }}} */
 391         /* bm85x based meters {{{ */
 392         DMM_LEN(
 393                 "brymen-bm85x", brymen_bm85x, "Brymen", "BM85x",
 394                 NULL, "9600/8n1/dtr=1/rts=1",
 395                 BRYMEN_BM85x_PACKET_SIZE_MIN, 2000, 400,
 396                 NULL, NULL, /* INIT/FREE for DMM state */
 397                 brymen_bm85x_after_open, brymen_bm85x_packet_request,
 398                 brymen_bm85x_packet_valid, brymen_bm85x_parse,
 399                 NULL
 400         ),
 401         /* }}} */
 402         /* bm86x based meters {{{ */
 403         DMM_CONN(
 404                 "brymen-bm86x", brymen_bm86x, "Brymen", "BM86x",
 405                 "hid/bu86x", NULL, BRYMEN_BM86X_PACKET_SIZE, 500, 100,
 406                 sr_brymen_bm86x_packet_request,
 407                 sr_brymen_bm86x_packet_valid, sr_brymen_bm86x_parse,
 408                 NULL
 409         ),
 410         /* }}} */
 411         /* dtm0660 based meters {{{ */
 412         DMM(
 413                 "peaktech-3415", dtm0660,
 414                 "PeakTech", "3415", "2400/8n1/rts=0/dtr=1",
 415                 DTM0660_PACKET_SIZE, 0, 0, NULL,
 416                 sr_dtm0660_packet_valid, sr_dtm0660_parse, NULL
 417         ),
 418         DMM(
 419                 "velleman-dvm4100", dtm0660,
 420                 "Velleman", "DVM4100", "2400/8n1/rts=0/dtr=1",
 421                 DTM0660_PACKET_SIZE, 0, 0, NULL,
 422                 sr_dtm0660_packet_valid, sr_dtm0660_parse, NULL
 423         ),
 424         /* }}} */
 425         /* eev121gw based meters {{{ */
 426         DMM(
 427                 "eevblog-121gw", eev121gw, "EEVblog", "121GW",
 428                 "115200/8n1", EEV121GW_PACKET_SIZE, 0, 0, NULL,
 429                 sr_eev121gw_packet_valid, sr_eev121gw_3displays_parse, NULL
 430         ),
 431         /* }}} */
 432         /* es519xx based meters {{{ */
 433         DMM(
 434                 "iso-tech-idm103n", es519xx,
 435                 "ISO-TECH", "IDM103N", "2400/7o1/rts=0/dtr=1",
 436                 ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 437                 sr_es519xx_2400_11b_packet_valid, sr_es519xx_2400_11b_parse,
 438                 NULL
 439         ),
 440         /*
 441          * Note: ES51922 and ES51986 baudrate is actually 19230. This is
 442          * "out" by .15%, and so is well within the typical 1% margin
 443          * that is considered acceptable in UART communication, and thus
 444          * should not cause an issue.
 445          *
 446          * However, using 19230 as baudrate here will not work, as most DMM
 447          * cables do not support that baudrate!
 448          */
 449         DMM(
 450                 "tenma-72-7750-ser", es519xx,
 451                 "Tenma", "72-7750 (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 452                 ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 453                 sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
 454                 NULL
 455         ),
 456         DMM(
 457                 "uni-t-ut60g-ser", es519xx,
 458                 "UNI-T", "UT60G (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 459                 ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 460                 sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
 461                 NULL
 462         ),
 463         DMM(
 464                 "uni-t-ut61e-ser", es519xx,
 465                 "UNI-T", "UT61E (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 466                 ES519XX_14B_PACKET_SIZE, 0, 0, NULL,
 467                 sr_es519xx_19200_14b_packet_valid, sr_es519xx_19200_14b_parse,
 468                 NULL
 469         ),
 470         /* }}} */
 471         /* fs9721 based meters {{{ */
 472         DMM(
 473                 "digitek-dt4000zc", fs9721,
 474                 "Digitek", "DT4000ZC", "2400/8n1/dtr=1",
 475                 FS9721_PACKET_SIZE, 0, 0, NULL,
 476                 sr_fs9721_packet_valid, sr_fs9721_parse,
 477                 sr_fs9721_10_temp_c
 478         ),
 479         DMM(
 480                 "mastech-ms8250b", fs9721,
 481                 "MASTECH", "MS8250B", "2400/8n1/rts=0/dtr=1",
 482                 FS9721_PACKET_SIZE, 0, 0, NULL,
 483                 sr_fs9721_packet_valid, sr_fs9721_parse,
 484                 NULL
 485         ),
 486         DMM(
 487                 "pce-pce-dm32", fs9721,
 488                 "PCE", "PCE-DM32", "2400/8n1",
 489                 FS9721_PACKET_SIZE, 0, 0, NULL,
 490                 sr_fs9721_packet_valid, sr_fs9721_parse,
 491                 sr_fs9721_01_10_temp_f_c
 492         ),
 493         DMM(
 494                 "peaktech-3330", fs9721,
 495                 "PeakTech", "3330", "2400/8n1/dtr=1",
 496                 FS9721_PACKET_SIZE, 0, 0, NULL,
 497                 sr_fs9721_packet_valid, sr_fs9721_parse,
 498                 sr_fs9721_01_10_temp_f_c
 499         ),
 500         DMM(
 501                 "tecpel-dmm-8061-ser", fs9721,
 502                 "Tecpel", "DMM-8061 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 503                 FS9721_PACKET_SIZE, 0, 0, NULL,
 504                 sr_fs9721_packet_valid, sr_fs9721_parse,
 505                 sr_fs9721_00_temp_c
 506         ),
 507         DMM(
 508                 "tekpower-tp4000ZC", fs9721,
 509                 "TekPower", "TP4000ZC", "2400/8n1/dtr=1",
 510                 FS9721_PACKET_SIZE, 0, 0, NULL,
 511                 sr_fs9721_packet_valid, sr_fs9721_parse,
 512                 sr_fs9721_10_temp_c
 513         ),
 514         DMM(
 515                 "tenma-72-7745-ser", fs9721,
 516                 "Tenma", "72-7745 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 517                 FS9721_PACKET_SIZE, 0, 0, NULL,
 518                 sr_fs9721_packet_valid, sr_fs9721_parse,
 519                 sr_fs9721_00_temp_c
 520         ),
 521         DMM(
 522                 "uni-t-ut60a-ser", fs9721,
 523                 "UNI-T", "UT60A (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 524                 FS9721_PACKET_SIZE, 0, 0, NULL,
 525                 sr_fs9721_packet_valid, sr_fs9721_parse,
 526                 NULL
 527         ),
 528         DMM(
 529                 "uni-t-ut60e-ser", fs9721,
 530                 "UNI-T", "UT60E (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 531                 FS9721_PACKET_SIZE, 0, 0, NULL,
 532                 sr_fs9721_packet_valid, sr_fs9721_parse,
 533                 sr_fs9721_00_temp_c
 534         ),
 535         DMM(
 536                 "va-va18b", fs9721,
 537                 "V&A", "VA18B", "2400/8n1",
 538                 FS9721_PACKET_SIZE, 0, 0, NULL,
 539                 sr_fs9721_packet_valid, sr_fs9721_parse,
 540                 sr_fs9721_01_temp_c
 541         ),
 542         DMM(
 543                 "va-va40b", fs9721,
 544                 "V&A", "VA40B", "2400/8n1",
 545                 FS9721_PACKET_SIZE, 0, 0, NULL,
 546                 sr_fs9721_packet_valid, sr_fs9721_parse,
 547                 sr_fs9721_max_c_min
 548         ),
 549         DMM(
 550                 "voltcraft-vc820-ser", fs9721,
 551                 "Voltcraft", "VC-820 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 552                 FS9721_PACKET_SIZE, 0, 0, NULL,
 553                 sr_fs9721_packet_valid, sr_fs9721_parse,
 554                 NULL
 555         ),
 556         DMM(
 557                 "voltcraft-vc840-ser", fs9721,
 558                 "Voltcraft", "VC-840 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 559                 FS9721_PACKET_SIZE, 0, 0, NULL,
 560                 sr_fs9721_packet_valid, sr_fs9721_parse,
 561                 sr_fs9721_00_temp_c
 562         ),
 563         /* }}} */
 564         /* fs9922 based meters {{{ */
 565         DMM(
 566                 "gwinstek-gdm-397", fs9922,
 567                 "GW Instek", "GDM-397", "2400/8n1/rts=0/dtr=1",
 568                 FS9922_PACKET_SIZE, 0, 0, NULL,
 569                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 570         ),
 571         DMM(
 572                 "peaktech-2025", fs9922,
 573                 "PeakTech", "2025", "2400/8n1/rts=0/dtr=1",
 574                 FS9922_PACKET_SIZE, 0, 0, NULL,
 575                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 576         ),
 577         DMM(
 578                 "sparkfun-70c", fs9922,
 579                 "SparkFun", "70C", "2400/8n1/rts=0/dtr=1",
 580                 FS9922_PACKET_SIZE, 0, 0, NULL,
 581                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 582         ),
 583         DMM(
 584                 "uni-t-ut61b-ser", fs9922,
 585                 "UNI-T", "UT61B (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 586                 FS9922_PACKET_SIZE, 0, 0, NULL,
 587                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 588         ),
 589         DMM(
 590                 "uni-t-ut61c-ser", fs9922,
 591                 "UNI-T", "UT61C (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 592                 FS9922_PACKET_SIZE, 0, 0, NULL,
 593                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 594         ),
 595         DMM(
 596                 "uni-t-ut61d-ser", fs9922,
 597                 "UNI-T", "UT61D (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 598                 FS9922_PACKET_SIZE, 0, 0, NULL,
 599                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 600         ),
 601         DMM_CONN(
 602                 "victor-dmm", fs9922, "Victor", "Victor DMMs",
 603                 "hid/victor", "2400/8n1", FS9922_PACKET_SIZE, 0, 0, NULL,
 604                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL
 605         ),
 606         DMM(
 607                 /*
 608                  * Note: The VC830 doesn't set the 'volt' and 'diode' bits of
 609                  * the FS9922 protocol. Instead, it only sets the user-defined
 610                  * bit "z1" to indicate "diode mode" and "voltage".
 611                  */
 612                 "voltcraft-vc830-ser", fs9922,
 613                 "Voltcraft", "VC-830 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 614                 FS9922_PACKET_SIZE, 0, 0, NULL,
 615                 sr_fs9922_packet_valid, sr_fs9922_parse,
 616                 &sr_fs9922_z1_diode
 617         ),
 618         /* }}} */
 619         /* m2110 based meters {{{ */
 620         DMM(
 621                 "bbcgm-2010", m2110,
 622                 "BBC Goertz Metrawatt", "M2110", "1200/7n2",
 623                 BBCGM_M2110_PACKET_SIZE, 0, 0, NULL,
 624                 sr_m2110_packet_valid, sr_m2110_parse,
 625                 NULL
 626         ),
 627         /* }}} */
 628         /* meterman_38xr based meters {{{ */
 629         DMM(
 630                 "meterman-38xr", meterman_38xr,
 631                 "Meterman", "38XR", "9600/8n1/rts=0/dtr=1",
 632                 METERMAN_38XR_PACKET_SIZE, 0, 0, NULL,
 633                 meterman_38xr_packet_valid, meterman_38xr_parse,
 634                 NULL
 635         ),
 636         /* }}} */
 637         /* metex14 based meters {{{ */
 638         DMM(
 639                 "mastech-mas345", metex14,
 640                 "MASTECH", "MAS345", "600/7n2/rts=0/dtr=1",
 641                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 642                 sr_metex14_packet_valid, sr_metex14_parse,
 643                 NULL
 644         ),
 645         DMM(
 646                 "metex-m3640d", metex14,
 647                 "Metex", "M-3640D", "1200/7n2/rts=0/dtr=1",
 648                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 649                 sr_metex14_packet_valid, sr_metex14_parse,
 650                 NULL
 651         ),
 652         DMM(
 653                 "metex-m3860m", metex14,
 654                 "Metex", "M-3860M", "9600/7n2/rts=0/dtr=1",
 655                 4 * METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 656                 sr_metex14_4packets_valid, sr_metex14_4packets_parse,
 657                 NULL
 658         ),
 659         DMM(
 660                 "metex-m4650cr", metex14,
 661                 "Metex", "M-4650CR", "1200/7n2/rts=0/dtr=1",
 662                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 663                 sr_metex14_packet_valid, sr_metex14_parse,
 664                 NULL
 665         ),
 666         DMM(
 667                 "metex-me21", metex14,
 668                 "Metex", "ME-21", "2400/7n2/rts=0/dtr=1",
 669                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 670                 sr_metex14_packet_valid, sr_metex14_parse,
 671                 NULL
 672         ),
 673         DMM(
 674                 "metex-me31", metex14,
 675                 "Metex", "ME-31", "600/7n2/rts=0/dtr=1",
 676                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 677                 sr_metex14_packet_valid, sr_metex14_parse,
 678                 NULL
 679         ),
 680         DMM(
 681                 "peaktech-3410", metex14,
 682                 "PeakTech", "3410", "600/7n2/rts=0/dtr=1",
 683                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 684                 sr_metex14_packet_valid, sr_metex14_parse,
 685                 NULL
 686         ),
 687         DMM(
 688                 "peaktech-4370", metex14,
 689                 "PeakTech", "4370", "1200/7n2/rts=0/dtr=1",
 690                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 691                 sr_metex14_packet_valid, sr_metex14_parse,
 692                 NULL
 693         ),
 694         DMM(
 695                 "peaktech-4390a", metex14,
 696                 "PeakTech", "4390A", "9600/7n2/rts=0/dtr=1",
 697                 4 * METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 698                 sr_metex14_4packets_valid, sr_metex14_4packets_parse,
 699                 NULL
 700         ),
 701         DMM(
 702                 "radioshack-22-168", metex14,
 703                 "RadioShack", "22-168", "1200/7n2/rts=0/dtr=1",
 704                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 705                 sr_metex14_packet_valid, sr_metex14_parse,
 706                 NULL
 707         ),
 708         DMM(
 709                 "radioshack-22-805", metex14,
 710                 "RadioShack", "22-805", "600/7n2/rts=0/dtr=1",
 711                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 712                 sr_metex14_packet_valid, sr_metex14_parse,
 713                 NULL
 714         ),
 715         DMM(
 716                 "voltcraft-m3650cr", metex14,
 717                 "Voltcraft", "M-3650CR", "1200/7n2/rts=0/dtr=1",
 718                 METEX14_PACKET_SIZE, 150, 20, sr_metex14_packet_request,
 719                 sr_metex14_packet_valid, sr_metex14_parse,
 720                 NULL
 721         ),
 722         DMM(
 723                 "voltcraft-m3650d", metex14,
 724                 "Voltcraft", "M-3650D", "1200/7n2/rts=0/dtr=1",
 725                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 726                 sr_metex14_packet_valid, sr_metex14_parse,
 727                 NULL
 728         ),
 729         DMM(
 730                 "voltcraft-m4650cr", metex14,
 731                 "Voltcraft", "M-4650CR", "1200/7n2/rts=0/dtr=1",
 732                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 733                 sr_metex14_packet_valid, sr_metex14_parse,
 734                 NULL
 735         ),
 736         DMM(
 737                 "voltcraft-me42", metex14,
 738                 "Voltcraft", "ME-42", "600/7n2/rts=0/dtr=1",
 739                 METEX14_PACKET_SIZE, 250, 60, sr_metex14_packet_request,
 740                 sr_metex14_packet_valid, sr_metex14_parse,
 741                 NULL
 742         ),
 743         /* }}} */
 744         /* ms2115b based meters {{{ */
 745         DMM(
 746                 "mastech-ms2115b", ms2115b,
 747                 "MASTECH", "MS2115B", "1200/8n1",
 748                 MS2115B_PACKET_SIZE, 0, 0, NULL,
 749                 sr_ms2115b_packet_valid, sr_ms2115b_parse,
 750                 NULL
 751         ),
 752         /* }}} */
 753         /* ms8250d based meters {{{ */
 754         DMM(
 755                 "mastech-ms8250d", ms8250d,
 756                 "MASTECH", "MS8250D", "2400/8n1/rts=0/dtr=1",
 757                 MS8250D_PACKET_SIZE, 0, 0, NULL,
 758                 sr_ms8250d_packet_valid, sr_ms8250d_parse,
 759                 NULL
 760         ),
 761         /* }}} */
 762         /* rs9lcd based meters {{{ */
 763         DMM(
 764                 "radioshack-22-812", rs9lcd,
 765                 "RadioShack", "22-812", "4800/8n1/rts=0/dtr=1",
 766                 RS9LCD_PACKET_SIZE, 0, 0, NULL,
 767                 sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
 768                 NULL
 769         ),
 770         /* }}} */
 771         /* ut71x based meters {{{ */
 772         DMM(
 773                 "tenma-72-7730-ser", ut71x,
 774                 "Tenma", "72-7730 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 775                 UT71X_PACKET_SIZE, 0, 0, NULL,
 776                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 777         ),
 778         DMM(
 779                 "tenma-72-7732-ser", ut71x,
 780                 "Tenma", "72-7732 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 781                 UT71X_PACKET_SIZE, 0, 0, NULL,
 782                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 783         ),
 784         DMM(
 785                 "tenma-72-9380a-ser", ut71x,
 786                 "Tenma", "72-9380A (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 787                 UT71X_PACKET_SIZE, 0, 0, NULL,
 788                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 789         ),
 790         DMM(
 791                 "uni-t-ut71a-ser", ut71x,
 792                 "UNI-T", "UT71A (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 793                 UT71X_PACKET_SIZE, 0, 0, NULL,
 794                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 795         ),
 796         DMM(
 797                 "uni-t-ut71b-ser", ut71x,
 798                 "UNI-T", "UT71B (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 799                 UT71X_PACKET_SIZE, 0, 0, NULL,
 800                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 801         ),
 802         DMM(
 803                 "uni-t-ut71c-ser", ut71x,
 804                 "UNI-T", "UT71C (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 805                 UT71X_PACKET_SIZE, 0, 0, NULL,
 806                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 807         ),
 808         DMM(
 809                 "uni-t-ut71d-ser", ut71x,
 810                 "UNI-T", "UT71D (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 811                 UT71X_PACKET_SIZE, 0, 0, NULL,
 812                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 813         ),
 814         DMM(
 815                 "uni-t-ut71e-ser", ut71x,
 816                 "UNI-T", "UT71E (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 817                 UT71X_PACKET_SIZE, 0, 0, NULL,
 818                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 819         ),
 820         DMM(
 821                 "uni-t-ut804-ser", ut71x,
 822                 "UNI-T", "UT804", "2400/7o1/rts=0/dtr=1",
 823                 UT71X_PACKET_SIZE, 0, 0, NULL,
 824                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 825         ),
 826         DMM(
 827                 "voltcraft-vc920-ser", ut71x,
 828                 "Voltcraft", "VC-920 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 829                 UT71X_PACKET_SIZE, 0, 0, NULL,
 830                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 831         ),
 832         DMM(
 833                 "voltcraft-vc940-ser", ut71x,
 834                 "Voltcraft", "VC-940 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 835                 UT71X_PACKET_SIZE, 0, 0, NULL,
 836                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 837         ),
 838         DMM(
 839                 "voltcraft-vc960-ser", ut71x,
 840                 "Voltcraft", "VC-960 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 841                 UT71X_PACKET_SIZE, 0, 0, NULL,
 842                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL
 843         ),
 844         /* }}} */
 845         /* vc870 based meters {{{ */
 846         DMM(
 847                 "voltcraft-vc870-ser", vc870,
 848                 "Voltcraft", "VC-870 (UT-D02 cable)", "9600/8n1/rts=0/dtr=1",
 849                 VC870_PACKET_SIZE, 0, 0, NULL,
 850                 sr_vc870_packet_valid, sr_vc870_parse, NULL
 851         ),
 852         /* }}} */
 853         /* vc96 based meters {{{ */
 854         DMM(
 855                 "voltcraft-vc96", vc96,
 856                 "Voltcraft", "VC-96", "1200/8n2",
 857                 VC96_PACKET_SIZE, 0, 0, NULL,
 858                 sr_vc96_packet_valid, sr_vc96_parse,
 859                 NULL
 860         ),
 861         /* }}} */
 862         /*
 863          * The list is sorted. Add new items in the respective chip's group.
 864          */
 865 );