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