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 <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <fcntl.h>
  25 #include <string.h>
  26 #include <errno.h>
  27 #include <glib.h>
  28 #include "libsigrok.h"
  29 #include "libsigrok-internal.h"
  30 #include "protocol.h"
  31
  32 static const int32_t hwopts[] = {
  33         SR_CONF_CONN,
  34         SR_CONF_SERIALCOMM,
  35 };
  36
  37 static const int32_t hwcaps[] = {
  38         SR_CONF_MULTIMETER,
  39         SR_CONF_LIMIT_SAMPLES,
  40         SR_CONF_LIMIT_MSEC,
  41         SR_CONF_CONTINUOUS,
  42 };
  43
  44 SR_PRIV struct sr_dev_driver bbcgm_m2110_driver_info;
  45 SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
  46 SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
  47 SR_PRIV struct sr_dev_driver metex_me31_driver_info;
  48 SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
  49 SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
  50 SR_PRIV struct sr_dev_driver va_va18b_driver_info;
  51 SR_PRIV struct sr_dev_driver va_va40b_driver_info;
  52 SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
  53 SR_PRIV struct sr_dev_driver metex_m4650cr_driver_info;
  54 SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
  55 SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
  56 SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
  57 SR_PRIV struct sr_dev_driver radioshack_22_805_driver_info;
  58 SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
  59 SR_PRIV struct sr_dev_driver tecpel_dmm_8061_ser_driver_info;
  60 SR_PRIV struct sr_dev_driver voltcraft_m3650d_driver_info;
  61 SR_PRIV struct sr_dev_driver voltcraft_m4650cr_driver_info;
  62 SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
  63 SR_PRIV struct sr_dev_driver voltcraft_vc830_ser_driver_info;
  64 SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
  65 SR_PRIV struct sr_dev_driver uni_t_ut60a_ser_driver_info;
  66 SR_PRIV struct sr_dev_driver uni_t_ut60e_ser_driver_info;
  67 SR_PRIV struct sr_dev_driver uni_t_ut60g_ser_driver_info;
  68 SR_PRIV struct sr_dev_driver uni_t_ut61b_ser_driver_info;
  69 SR_PRIV struct sr_dev_driver uni_t_ut61c_ser_driver_info;
  70 SR_PRIV struct sr_dev_driver uni_t_ut61d_ser_driver_info;
  71 SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;
  72 SR_PRIV struct sr_dev_driver iso_tech_idm103n_driver_info;
  73 SR_PRIV struct sr_dev_driver tenma_72_7745_ser_driver_info;
  74 SR_PRIV struct sr_dev_driver tenma_72_7750_ser_driver_info;
  75
  76 SR_PRIV struct dmm_info dmms[] = {
  77         {
  78                 "BBC Goertz Metrawatt", "M2110", "1200/7n2", 1200,
  79                 BBCGM_M2110_PACKET_SIZE, NULL,
  80                 sr_m2110_packet_valid, sr_m2110_parse,
  81                 NULL,
  82                 &bbcgm_m2110_driver_info, receive_data_BBCGM_M2110,
  83         },
  84         {
  85                 "Digitek", "DT4000ZC", "2400/8n1/dtr=1", 2400,
  86                 FS9721_PACKET_SIZE, NULL,
  87                 sr_fs9721_packet_valid, sr_fs9721_parse,
  88                 sr_fs9721_10_temp_c,
  89                 &digitek_dt4000zc_driver_info, receive_data_DIGITEK_DT4000ZC,
  90         },
  91         {
  92                 "TekPower", "TP4000ZC", "2400/8n1/dtr=1", 2400,
  93                 FS9721_PACKET_SIZE, NULL,
  94                 sr_fs9721_packet_valid, sr_fs9721_parse,
  95                 sr_fs9721_10_temp_c,
  96                 &tekpower_tp4000zc_driver_info, receive_data_TEKPOWER_TP4000ZC,
  97         },
  98         {
  99                 "Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
 100                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 101                 sr_metex14_packet_valid, sr_metex14_parse,
 102                 NULL,
 103                 &metex_me31_driver_info, receive_data_METEX_ME31,
 104         },
 105         {
 106                 "Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
 107                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 108                 sr_metex14_packet_valid, sr_metex14_parse,
 109                 NULL,
 110                 &peaktech_3410_driver_info, receive_data_PEAKTECH_3410,
 111         },
 112         {
 113                 "MASTECH", "MAS345", "600/7n2/rts=0/dtr=1", 600,
 114                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 115                 sr_metex14_packet_valid, sr_metex14_parse,
 116                 NULL,
 117                 &mastech_mas345_driver_info, receive_data_MASTECH_MAS345,
 118         },
 119         {
 120                 "V&A", "VA18B", "2400/8n1", 2400,
 121                 FS9721_PACKET_SIZE, NULL,
 122                 sr_fs9721_packet_valid, sr_fs9721_parse,
 123                 sr_fs9721_01_temp_c,
 124                 &va_va18b_driver_info, receive_data_VA_VA18B,
 125         },
 126         {
 127                 "V&A", "VA40B", "2400/8n1", 2400,
 128                 FS9721_PACKET_SIZE, NULL,
 129                 sr_fs9721_packet_valid, sr_fs9721_parse,
 130                 sr_fs9721_max_c_min,
 131                 &va_va40b_driver_info, receive_data_VA_VA40B,
 132         },
 133         {
 134                 "Metex", "M-3640D", "1200/7n2/rts=0/dtr=1", 1200,
 135                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 136                 sr_metex14_packet_valid, sr_metex14_parse,
 137                 NULL,
 138                 &metex_m3640d_driver_info, receive_data_METEX_M3640D,
 139         },
 140         {
 141                 "Metex", "M-4650CR", "1200/7n2/rts=0/dtr=1", 1200,
 142                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 143                 sr_metex14_packet_valid, sr_metex14_parse,
 144                 NULL,
 145                 &metex_m4650cr_driver_info, receive_data_METEX_M4650CR,
 146         },
 147         {
 148                 "PeakTech", "4370", "1200/7n2/rts=0/dtr=1", 1200,
 149                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 150                 sr_metex14_packet_valid, sr_metex14_parse,
 151                 NULL,
 152                 &peaktech_4370_driver_info, receive_data_PEAKTECH_4370,
 153         },
 154         {
 155                 "PCE", "PCE-DM32", "2400/8n1", 2400,
 156                 FS9721_PACKET_SIZE, NULL,
 157                 sr_fs9721_packet_valid, sr_fs9721_parse,
 158                 sr_fs9721_01_10_temp_f_c,
 159                 &pce_pce_dm32_driver_info, receive_data_PCE_PCE_DM32,
 160         },
 161         {
 162                 "RadioShack", "22-168", "1200/7n2/rts=0/dtr=1", 1200,
 163                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 164                 sr_metex14_packet_valid, sr_metex14_parse,
 165                 NULL,
 166                 &radioshack_22_168_driver_info, receive_data_RADIOSHACK_22_168,
 167         },
 168         {
 169                 "RadioShack", "22-805", "600/7n2/rts=0/dtr=1", 600,
 170                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 171                 sr_metex14_packet_valid, sr_metex14_parse,
 172                 NULL,
 173                 &radioshack_22_805_driver_info, receive_data_RADIOSHACK_22_805,
 174         },
 175         {
 176                 "RadioShack", "22-812", "4800/8n1/rts=0/dtr=1", 4800,
 177                 RS9LCD_PACKET_SIZE, NULL,
 178                 sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
 179                 NULL,
 180                 &radioshack_22_812_driver_info, receive_data_RADIOSHACK_22_812,
 181         },
 182         {
 183                 "Tecpel", "DMM-8061 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 184                 2400, FS9721_PACKET_SIZE, NULL,
 185                 sr_fs9721_packet_valid, sr_fs9721_parse,
 186                 sr_fs9721_00_temp_c,
 187                 &tecpel_dmm_8061_ser_driver_info,
 188                 receive_data_TECPEL_DMM_8061_SER,
 189         },
 190         {
 191                 "Voltcraft", "M-3650D", "1200/7n2/rts=0/dtr=1", 1200,
 192                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 193                 sr_metex14_packet_valid, sr_metex14_parse,
 194                 NULL,
 195                 &voltcraft_m3650d_driver_info, receive_data_VOLTCRAFT_M3650D,
 196         },
 197         {
 198                 "Voltcraft", "M-4650CR", "1200/7n2/rts=0/dtr=1", 1200,
 199                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 200                 sr_metex14_packet_valid, sr_metex14_parse,
 201                 NULL,
 202                 &voltcraft_m4650cr_driver_info, receive_data_VOLTCRAFT_M4650CR,
 203         },
 204         {
 205                 "Voltcraft", "VC-820 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 206                 2400, FS9721_PACKET_SIZE, NULL,
 207                 sr_fs9721_packet_valid, sr_fs9721_parse,
 208                 NULL,
 209                 &voltcraft_vc820_ser_driver_info,
 210                 receive_data_VOLTCRAFT_VC820_SER,
 211         },
 212         {
 213                 /*
 214                  * Note: The VC830 doesn't set the 'volt' and 'diode' bits of
 215                  * the FS9922 protocol. Instead, it only sets the user-defined
 216                  * bit "z1" to indicate "diode mode" and "voltage".
 217                  */
 218                 "Voltcraft", "VC-830 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 219                 2400, FS9922_PACKET_SIZE, NULL,
 220                 sr_fs9922_packet_valid, sr_fs9922_parse,
 221                 &sr_fs9922_z1_diode,
 222                 &voltcraft_vc830_ser_driver_info,
 223                 receive_data_VOLTCRAFT_VC830_SER,
 224         },
 225         {
 226                 "Voltcraft", "VC-840 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 227                 2400, FS9721_PACKET_SIZE, NULL,
 228                 sr_fs9721_packet_valid, sr_fs9721_parse,
 229                 sr_fs9721_00_temp_c,
 230                 &voltcraft_vc840_ser_driver_info,
 231                 receive_data_VOLTCRAFT_VC840_SER,
 232         },
 233         {
 234                 "UNI-T", "UT60A (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 235                 2400, FS9721_PACKET_SIZE, NULL,
 236                 sr_fs9721_packet_valid, sr_fs9721_parse,
 237                 NULL,
 238                 &uni_t_ut60a_ser_driver_info,
 239                 receive_data_UNI_T_UT60A_SER,
 240         },
 241         {
 242                 "UNI-T", "UT60E (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 243                 2400, FS9721_PACKET_SIZE, NULL,
 244                 sr_fs9721_packet_valid, sr_fs9721_parse,
 245                 sr_fs9721_00_temp_c,
 246                 &uni_t_ut60e_ser_driver_info,
 247                 receive_data_UNI_T_UT60E_SER,
 248         },
 249         {
 250                 /* Note: ES51986 baudrate is actually 19230! */
 251                 "UNI-T", "UT60G (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 252                 19200, ES519XX_11B_PACKET_SIZE, NULL,
 253                 sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
 254                 NULL,
 255                 &uni_t_ut60g_ser_driver_info, receive_data_UNI_T_UT60G_SER,
 256         },
 257         {
 258                 "UNI-T", "UT61B (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 259                 2400, FS9922_PACKET_SIZE, NULL,
 260                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
 261                 &uni_t_ut61b_ser_driver_info, receive_data_UNI_T_UT61B_SER,
 262         },
 263         {
 264                 "UNI-T", "UT61C (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 265                 2400, FS9922_PACKET_SIZE, NULL,
 266                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
 267                 &uni_t_ut61c_ser_driver_info, receive_data_UNI_T_UT61C_SER,
 268         },
 269         {
 270                 "UNI-T", "UT61D (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 271                 2400, FS9922_PACKET_SIZE, NULL,
 272                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
 273                 &uni_t_ut61d_ser_driver_info, receive_data_UNI_T_UT61D_SER,
 274         },
 275         {
 276                 /* Note: ES51922 baudrate is actually 19230! */
 277                 "UNI-T", "UT61E (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 278                 19200, ES519XX_14B_PACKET_SIZE, NULL,
 279                 sr_es519xx_19200_14b_packet_valid, sr_es519xx_19200_14b_parse,
 280                 NULL,
 281                 &uni_t_ut61e_ser_driver_info, receive_data_UNI_T_UT61E_SER,
 282         },
 283         {
 284                 "ISO-TECH", "IDM103N", "2400/7o1/rts=0/dtr=1",
 285                 2400, ES519XX_11B_PACKET_SIZE, NULL,
 286                 sr_es519xx_2400_11b_packet_valid, sr_es519xx_2400_11b_parse,
 287                 NULL,
 288                 &iso_tech_idm103n_driver_info, receive_data_ISO_TECH_IDM103N,
 289         },
 290         {
 291                 "Tenma", "72-7745 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 292                 2400, FS9721_PACKET_SIZE, NULL,
 293                 sr_fs9721_packet_valid, sr_fs9721_parse,
 294                 sr_fs9721_00_temp_c,
 295                 &tenma_72_7745_ser_driver_info, receive_data_TENMA_72_7745_SER,
 296         },
 297         {
 298                 /* Note: ES51986 baudrate is actually 19230! */
 299                 "Tenma", "72-7750 (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 300                 19200, ES519XX_11B_PACKET_SIZE, NULL,
 301                 sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
 302                 NULL,
 303                 &tenma_72_7750_ser_driver_info, receive_data_TENMA_72_7750_SER,
 304         },
 305 };
 306
 307 static int dev_clear(int dmm)
 308 {
 309         return std_dev_clear(dmms[dmm].di, NULL);
 310 }
 311
 312 static int init(struct sr_context *sr_ctx, int dmm)
 313 {
 314         sr_dbg("Selected '%s' subdriver.", dmms[dmm].di->name);
 315
 316         return std_init(sr_ctx, dmms[dmm].di, LOG_PREFIX);
 317 }
 318
 319 static GSList *sdmm_scan(const char *conn, const char *serialcomm, int dmm)
 320 {
 321         struct sr_dev_inst *sdi;
 322         struct drv_context *drvc;
 323         struct dev_context *devc;
 324         struct sr_probe *probe;
 325         struct sr_serial_dev_inst *serial;
 326         GSList *devices;
 327         int dropped, ret;
 328         size_t len;
 329         uint8_t buf[128];
 330
 331         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
 332                 return NULL;
 333
 334         if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 335                 return NULL;
 336
 337         sr_info("Probing serial port %s.", conn);
 338
 339         drvc = dmms[dmm].di->priv;
 340         devices = NULL;
 341         serial_flush(serial);
 342
 343         /* Request a packet if the DMM requires this. */
 344         if (dmms[dmm].packet_request) {
 345                 if ((ret = dmms[dmm].packet_request(serial)) < 0) {
 346                         sr_err("Failed to request packet: %d.", ret);
 347                         return FALSE;
 348                 }
 349         }
 350
 351         /*
 352          * There's no way to get an ID from the multimeter. It just sends data
 353          * periodically (or upon request), so the best we can do is check if
 354          * the packets match the expected format.
 355          */
 356
 357         /* Let's get a bit of data and see if we can find a packet. */
 358         len = sizeof(buf);
 359         ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
 360                                    dmms[dmm].packet_valid, 3000,
 361                                    dmms[dmm].baudrate);
 362         if (ret != SR_OK)
 363                 goto scan_cleanup;
 364
 365         /*
 366          * If we dropped more than two packets worth of data, something is
 367          * wrong. We shouldn't quit however, since the dropped bytes might be
 368          * just zeroes at the beginning of the stream. Those can occur as a
 369          * combination of the nonstandard cable that ships with some devices
 370          * and the serial port or USB to serial adapter.
 371          */
 372         dropped = len - dmms[dmm].packet_size;
 373         if (dropped > 2 * dmms[dmm].packet_size)
 374                 sr_warn("Had to drop too much data.");
 375
 376         sr_info("Found device on port %s.", conn);
 377
 378         if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, dmms[dmm].vendor,
 379                                     dmms[dmm].device, "")))
 380                 goto scan_cleanup;
 381
 382         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 383                 sr_err("Device context malloc failed.");
 384                 goto scan_cleanup;
 385         }
 386
 387         sdi->inst_type = SR_INST_SERIAL;
 388         sdi->conn = serial;
 389
 390         sdi->priv = devc;
 391         sdi->driver = dmms[dmm].di;
 392         if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
 393                 goto scan_cleanup;
 394         sdi->probes = g_slist_append(sdi->probes, probe);
 395         drvc->instances = g_slist_append(drvc->instances, sdi);
 396         devices = g_slist_append(devices, sdi);
 397
 398 scan_cleanup:
 399         serial_close(serial);
 400
 401         return devices;
 402 }
 403
 404 static GSList *scan(GSList *options, int dmm)
 405 {
 406         struct sr_config *src;
 407         GSList *l, *devices;
 408         const char *conn, *serialcomm;
 409
 410         conn = serialcomm = NULL;
 411         for (l = options; l; l = l->next) {
 412                 src = l->data;
 413                 switch (src->key) {
 414                 case SR_CONF_CONN:
 415                         conn = g_variant_get_string(src->data, NULL);
 416                         break;
 417                 case SR_CONF_SERIALCOMM:
 418                         serialcomm = g_variant_get_string(src->data, NULL);
 419                         break;
 420                 }
 421         }
 422         if (!conn)
 423                 return NULL;
 424
 425         if (serialcomm) {
 426                 /* Use the provided comm specs. */
 427                 devices = sdmm_scan(conn, serialcomm, dmm);
 428         } else {
 429                 /* Try the default. */
 430                 devices = sdmm_scan(conn, dmms[dmm].conn, dmm);
 431         }
 432
 433         return devices;
 434 }
 435
 436 static GSList *dev_list(int dmm)
 437 {
 438         return ((struct drv_context *)(dmms[dmm].di->priv))->instances;
 439 }
 440
 441 static int cleanup(int dmm)
 442 {
 443         return dev_clear(dmm);
 444 }
 445
 446 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
 447                 const struct sr_probe_group *probe_group)
 448 {
 449         struct dev_context *devc;
 450
 451         (void)probe_group;
 452
 453         if (sdi->status != SR_ST_ACTIVE)
 454                 return SR_ERR_DEV_CLOSED;
 455
 456         if (!(devc = sdi->priv)) {
 457                 sr_err("sdi->priv was NULL.");
 458                 return SR_ERR_BUG;
 459         }
 460
 461         switch (id) {
 462         case SR_CONF_LIMIT_SAMPLES:
 463                 devc->limit_samples = g_variant_get_uint64(data);
 464                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 465                        devc->limit_samples);
 466                 break;
 467         case SR_CONF_LIMIT_MSEC:
 468                 devc->limit_msec = g_variant_get_uint64(data);
 469                 sr_dbg("Setting time limit to %" PRIu64 "ms.",
 470                        devc->limit_msec);
 471                 break;
 472         default:
 473                 return SR_ERR_NA;
 474         }
 475
 476         return SR_OK;
 477 }
 478
 479 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 480                 const struct sr_probe_group *probe_group)
 481 {
 482         (void)sdi;
 483         (void)probe_group;
 484
 485         switch (key) {
 486         case SR_CONF_SCAN_OPTIONS:
 487                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 488                                 hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
 489                 break;
 490         case SR_CONF_DEVICE_OPTIONS:
 491                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 492                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 493                 break;
 494         default:
 495                 return SR_ERR_NA;
 496         }
 497
 498         return SR_OK;
 499 }
 500
 501 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 502                                     void *cb_data, int dmm)
 503 {
 504         struct dev_context *devc;
 505         struct sr_serial_dev_inst *serial;
 506
 507         if (sdi->status != SR_ST_ACTIVE)
 508                 return SR_ERR_DEV_CLOSED;
 509
 510         if (!(devc = sdi->priv)) {
 511                 sr_err("sdi->priv was NULL.");
 512                 return SR_ERR_BUG;
 513         }
 514
 515         devc->cb_data = cb_data;
 516
 517         /*
 518          * Reset the number of samples to take. If we've already collected our
 519          * quota, but we start a new session, and don't reset this, we'll just
 520          * quit without acquiring any new samples.
 521          */
 522         devc->num_samples = 0;
 523         devc->starttime = g_get_monotonic_time();
 524
 525         /* Send header packet to the session bus. */
 526         std_session_send_df_header(cb_data, LOG_PREFIX);
 527
 528         /* Poll every 50ms, or whenever some data comes in. */
 529         serial = sdi->conn;
 530         serial_source_add(serial, G_IO_IN, 50,
 531                       dmms[dmm].receive_data, (void *)sdi);
 532
 533         return SR_OK;
 534 }
 535
 536 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 537 {
 538         return std_serial_dev_acquisition_stop(sdi, cb_data, std_serial_dev_close,
 539                         sdi->conn, LOG_PREFIX);
 540 }
 541
 542 /* Driver-specific API function wrappers */
 543 #define HW_INIT(X) \
 544 static int init_##X(struct sr_context *sr_ctx) { return init(sr_ctx, X); }
 545 #define HW_CLEANUP(X) \
 546 static int cleanup_##X(void) { return cleanup(X); }
 547 #define HW_SCAN(X) \
 548 static GSList *scan_##X(GSList *options) { return scan(options, X); }
 549 #define HW_DEV_LIST(X) \
 550 static GSList *dev_list_##X(void) { return dev_list(X); }
 551 #define HW_DEV_CLEAR(X) \
 552 static int dev_clear_##X(void) { return dev_clear(X); }
 553 #define HW_DEV_ACQUISITION_START(X) \
 554 static int dev_acquisition_start_##X(const struct sr_dev_inst *sdi, \
 555 void *cb_data) { return dev_acquisition_start(sdi, cb_data, X); }
 556
 557 /* Driver structs and API function wrappers */
 558 #define DRV(ID, ID_UPPER, NAME, LONGNAME) \
 559 HW_INIT(ID_UPPER) \
 560 HW_CLEANUP(ID_UPPER) \
 561 HW_SCAN(ID_UPPER) \
 562 HW_DEV_LIST(ID_UPPER) \
 563 HW_DEV_CLEAR(ID_UPPER) \
 564 HW_DEV_ACQUISITION_START(ID_UPPER) \
 565 SR_PRIV struct sr_dev_driver ID##_driver_info = { \
 566         .name = NAME, \
 567         .longname = LONGNAME, \
 568         .api_version = 1, \
 569         .init = init_##ID_UPPER, \
 570         .cleanup = cleanup_##ID_UPPER, \
 571         .scan = scan_##ID_UPPER, \
 572         .dev_list = dev_list_##ID_UPPER, \
 573         .dev_clear = dev_clear_##ID_UPPER, \
 574         .config_get = NULL, \
 575         .config_set = config_set, \
 576         .config_list = config_list, \
 577         .dev_open = std_serial_dev_open, \
 578         .dev_close = std_serial_dev_close, \
 579         .dev_acquisition_start = dev_acquisition_start_##ID_UPPER, \
 580         .dev_acquisition_stop = dev_acquisition_stop, \
 581         .priv = NULL, \
 582 };
 583
 584 DRV(bbcgm_m2110, BBCGM_M2110, "bbcgm-m2110", "BBC Goertz Metrawatt M2110")
 585 DRV(digitek_dt4000zc, DIGITEK_DT4000ZC, "digitek-dt4000zc", "Digitek DT4000ZC")
 586 DRV(tekpower_tp4000zc, TEKPOWER_TP4000ZC, "tekpower-tp4000zc", "TekPower TP4000ZC")
 587 DRV(metex_me31, METEX_ME31, "metex-me31", "Metex ME-31")
 588 DRV(peaktech_3410, PEAKTECH_3410, "peaktech-3410", "PeakTech 3410")
 589 DRV(mastech_mas345, MASTECH_MAS345, "mastech-mas345", "MASTECH MAS345")
 590 DRV(va_va18b, VA_VA18B, "va-va18b", "V&A VA18B")
 591 DRV(va_va40b, VA_VA40B, "va-va40b", "V&A VA40B")
 592 DRV(metex_m3640d, METEX_M3640D, "metex-m3640d", "Metex M-3640D")
 593 DRV(metex_m4650cr, METEX_M4650CR, "metex-m4650cr", "Metex M-4650CR")
 594 DRV(peaktech_4370, PEAKTECH_4370, "peaktech-4370", "PeakTech 4370")
 595 DRV(pce_pce_dm32, PCE_PCE_DM32, "pce-pce-dm32", "PCE PCE-DM32")
 596 DRV(radioshack_22_168, RADIOSHACK_22_168, "radioshack-22-168", "RadioShack 22-168")
 597 DRV(radioshack_22_805, RADIOSHACK_22_805, "radioshack-22-805", "RadioShack 22-805")
 598 DRV(radioshack_22_812, RADIOSHACK_22_812, "radioshack-22-812", "RadioShack 22-812")
 599 DRV(tecpel_dmm_8061_ser, TECPEL_DMM_8061_SER, "tecpel-dmm-8061-ser", "Tecpel DMM-8061 (UT-D02 cable)")
 600 DRV(voltcraft_m3650d, VOLTCRAFT_M3650D, "voltcraft-m3650d", "Voltcraft M-3650D")
 601 DRV(voltcraft_m4650cr, VOLTCRAFT_M4650CR, "voltcraft-m4650cr", "Voltcraft M-4650CR")
 602 DRV(voltcraft_vc820_ser, VOLTCRAFT_VC820_SER, "voltcraft-vc820-ser", "Voltcraft VC-820 (UT-D02 cable)")
 603 DRV(voltcraft_vc830_ser, VOLTCRAFT_VC830_SER, "voltcraft-vc830-ser", "Voltcraft VC-830 (UT-D02 cable)")
 604 DRV(voltcraft_vc840_ser, VOLTCRAFT_VC840_SER, "voltcraft-vc840-ser", "Voltcraft VC-840 (UT-D02 cable)")
 605 DRV(uni_t_ut60a_ser, UNI_T_UT60A_SER, "uni-t-ut60a-ser", "UNI-T UT60A (UT-D02 cable)")
 606 DRV(uni_t_ut60e_ser, UNI_T_UT60E_SER, "uni-t-ut60e-ser", "UNI-T UT60E (UT-D02 cable)")
 607 DRV(uni_t_ut60g_ser, UNI_T_UT60G_SER, "uni-t-ut60g-ser", "UNI-T UT60G (UT-D02 cable)")
 608 DRV(uni_t_ut61b_ser, UNI_T_UT61B_SER, "uni-t-ut61b-ser", "UNI-T UT61B (UT-D02 cable)")
 609 DRV(uni_t_ut61c_ser, UNI_T_UT61C_SER, "uni-t-ut61c-ser", "UNI-T UT61C (UT-D02 cable)")
 610 DRV(uni_t_ut61d_ser, UNI_T_UT61D_SER, "uni-t-ut61d-ser", "UNI-T UT61D (UT-D02 cable)")
 611 DRV(uni_t_ut61e_ser, UNI_T_UT61E_SER, "uni-t-ut61e-ser", "UNI-T UT61E (UT-D02 cable)")
 612 DRV(iso_tech_idm103n, ISO_TECH_IDM103N, "iso-tech-idm103n", "ISO-TECH IDM103N")
 613 DRV(tenma_72_7745_ser, TENMA_72_7745_SER, "tenma-72-7745-ser", "Tenma 72-7745 (UT-D02 cable)")
 614 DRV(tenma_72_7750_ser, TENMA_72_7750_SER, "tenma-72-7750-ser", "Tenma 72-7750 (UT-D02 cable)")