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 <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 uint32_t scanopts[] = {
  33         SR_CONF_CONN,
  34         SR_CONF_SERIALCOMM,
  35 };
  36
  37 static const uint32_t devopts[] = {
  38         SR_CONF_MULTIMETER,
  39         SR_CONF_CONTINUOUS,
  40         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  41         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
  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 mastech_ms8250b_driver_info;
  51 SR_PRIV struct sr_dev_driver va_va18b_driver_info;
  52 SR_PRIV struct sr_dev_driver va_va40b_driver_info;
  53 SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
  54 SR_PRIV struct sr_dev_driver metex_m4650cr_driver_info;
  55 SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
  56 SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
  57 SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
  58 SR_PRIV struct sr_dev_driver radioshack_22_805_driver_info;
  59 SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
  60 SR_PRIV struct sr_dev_driver tecpel_dmm_8061_ser_driver_info;
  61 SR_PRIV struct sr_dev_driver voltcraft_m3650cr_driver_info;
  62 SR_PRIV struct sr_dev_driver voltcraft_m3650d_driver_info;
  63 SR_PRIV struct sr_dev_driver voltcraft_m4650cr_driver_info;
  64 SR_PRIV struct sr_dev_driver voltcraft_me42_driver_info;
  65 SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
  66 SR_PRIV struct sr_dev_driver voltcraft_vc830_ser_driver_info;
  67 SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
  68 SR_PRIV struct sr_dev_driver voltcraft_vc920_ser_driver_info;
  69 SR_PRIV struct sr_dev_driver voltcraft_vc940_ser_driver_info;
  70 SR_PRIV struct sr_dev_driver voltcraft_vc960_ser_driver_info;
  71 SR_PRIV struct sr_dev_driver uni_t_ut60a_ser_driver_info;
  72 SR_PRIV struct sr_dev_driver uni_t_ut60e_ser_driver_info;
  73 SR_PRIV struct sr_dev_driver uni_t_ut60g_ser_driver_info;
  74 SR_PRIV struct sr_dev_driver uni_t_ut61b_ser_driver_info;
  75 SR_PRIV struct sr_dev_driver uni_t_ut61c_ser_driver_info;
  76 SR_PRIV struct sr_dev_driver uni_t_ut61d_ser_driver_info;
  77 SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;
  78 SR_PRIV struct sr_dev_driver uni_t_ut71a_ser_driver_info;
  79 SR_PRIV struct sr_dev_driver uni_t_ut71b_ser_driver_info;
  80 SR_PRIV struct sr_dev_driver uni_t_ut71c_ser_driver_info;
  81 SR_PRIV struct sr_dev_driver uni_t_ut71d_ser_driver_info;
  82 SR_PRIV struct sr_dev_driver uni_t_ut71e_ser_driver_info;
  83 SR_PRIV struct sr_dev_driver iso_tech_idm103n_driver_info;
  84 SR_PRIV struct sr_dev_driver tenma_72_7745_ser_driver_info;
  85 SR_PRIV struct sr_dev_driver tenma_72_7750_ser_driver_info;
  86 SR_PRIV struct sr_dev_driver brymen_bm25x_driver_info;
  87
  88 SR_PRIV struct dmm_info dmms[] = {
  89         {
  90                 "BBC Goertz Metrawatt", "M2110", "1200/7n2", 1200,
  91                 BBCGM_M2110_PACKET_SIZE, 0, 0, NULL,
  92                 sr_m2110_packet_valid, sr_m2110_parse,
  93                 NULL,
  94                 &bbcgm_m2110_driver_info, receive_data_BBCGM_M2110,
  95         },
  96         {
  97                 "Digitek", "DT4000ZC", "2400/8n1/dtr=1", 2400,
  98                 FS9721_PACKET_SIZE, 0, 0, NULL,
  99                 sr_fs9721_packet_valid, sr_fs9721_parse,
 100                 sr_fs9721_10_temp_c,
 101                 &digitek_dt4000zc_driver_info, receive_data_DIGITEK_DT4000ZC,
 102         },
 103         {
 104                 "TekPower", "TP4000ZC", "2400/8n1/dtr=1", 2400,
 105                 FS9721_PACKET_SIZE, 0, 0, NULL,
 106                 sr_fs9721_packet_valid, sr_fs9721_parse,
 107                 sr_fs9721_10_temp_c,
 108                 &tekpower_tp4000zc_driver_info, receive_data_TEKPOWER_TP4000ZC,
 109         },
 110         {
 111                 "Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
 112                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 113                 sr_metex14_packet_valid, sr_metex14_parse,
 114                 NULL,
 115                 &metex_me31_driver_info, receive_data_METEX_ME31,
 116         },
 117         {
 118                 "Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
 119                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 120                 sr_metex14_packet_valid, sr_metex14_parse,
 121                 NULL,
 122                 &peaktech_3410_driver_info, receive_data_PEAKTECH_3410,
 123         },
 124         {
 125                 "MASTECH", "MAS345", "600/7n2/rts=0/dtr=1", 600,
 126                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 127                 sr_metex14_packet_valid, sr_metex14_parse,
 128                 NULL,
 129                 &mastech_mas345_driver_info, receive_data_MASTECH_MAS345,
 130         },
 131         {
 132                 "MASTECH", "MS8250B", "2400/8n1/rts=0/dtr=1",
 133                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 134                 sr_fs9721_packet_valid, sr_fs9721_parse,
 135                 NULL,
 136                 &mastech_ms8250b_driver_info, receive_data_MASTECH_MS8250B,
 137         },
 138         {
 139                 "V&A", "VA18B", "2400/8n1", 2400,
 140                 FS9721_PACKET_SIZE, 0, 0, NULL,
 141                 sr_fs9721_packet_valid, sr_fs9721_parse,
 142                 sr_fs9721_01_temp_c,
 143                 &va_va18b_driver_info, receive_data_VA_VA18B,
 144         },
 145         {
 146                 "V&A", "VA40B", "2400/8n1", 2400,
 147                 FS9721_PACKET_SIZE, 0, 0, NULL,
 148                 sr_fs9721_packet_valid, sr_fs9721_parse,
 149                 sr_fs9721_max_c_min,
 150                 &va_va40b_driver_info, receive_data_VA_VA40B,
 151         },
 152         {
 153                 "Metex", "M-3640D", "1200/7n2/rts=0/dtr=1", 1200,
 154                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 155                 sr_metex14_packet_valid, sr_metex14_parse,
 156                 NULL,
 157                 &metex_m3640d_driver_info, receive_data_METEX_M3640D,
 158         },
 159         {
 160                 "Metex", "M-4650CR", "1200/7n2/rts=0/dtr=1", 1200,
 161                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 162                 sr_metex14_packet_valid, sr_metex14_parse,
 163                 NULL,
 164                 &metex_m4650cr_driver_info, receive_data_METEX_M4650CR,
 165         },
 166         {
 167                 "PeakTech", "4370", "1200/7n2/rts=0/dtr=1", 1200,
 168                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 169                 sr_metex14_packet_valid, sr_metex14_parse,
 170                 NULL,
 171                 &peaktech_4370_driver_info, receive_data_PEAKTECH_4370,
 172         },
 173         {
 174                 "PCE", "PCE-DM32", "2400/8n1", 2400,
 175                 FS9721_PACKET_SIZE, 0, 0, NULL,
 176                 sr_fs9721_packet_valid, sr_fs9721_parse,
 177                 sr_fs9721_01_10_temp_f_c,
 178                 &pce_pce_dm32_driver_info, receive_data_PCE_PCE_DM32,
 179         },
 180         {
 181                 "RadioShack", "22-168", "1200/7n2/rts=0/dtr=1", 1200,
 182                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 183                 sr_metex14_packet_valid, sr_metex14_parse,
 184                 NULL,
 185                 &radioshack_22_168_driver_info, receive_data_RADIOSHACK_22_168,
 186         },
 187         {
 188                 "RadioShack", "22-805", "600/7n2/rts=0/dtr=1", 600,
 189                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 190                 sr_metex14_packet_valid, sr_metex14_parse,
 191                 NULL,
 192                 &radioshack_22_805_driver_info, receive_data_RADIOSHACK_22_805,
 193         },
 194         {
 195                 "RadioShack", "22-812", "4800/8n1/rts=0/dtr=1", 4800,
 196                 RS9LCD_PACKET_SIZE, 0, 0, NULL,
 197                 sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
 198                 NULL,
 199                 &radioshack_22_812_driver_info, receive_data_RADIOSHACK_22_812,
 200         },
 201         {
 202                 "Tecpel", "DMM-8061 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 203                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 204                 sr_fs9721_packet_valid, sr_fs9721_parse,
 205                 sr_fs9721_00_temp_c,
 206                 &tecpel_dmm_8061_ser_driver_info,
 207                 receive_data_TECPEL_DMM_8061_SER,
 208         },
 209         {
 210                 "Voltcraft", "M-3650CR", "1200/7n2/rts=0/dtr=1", 1200,
 211                 METEX14_PACKET_SIZE, 150, 20, sr_metex14_packet_request,
 212                 sr_metex14_packet_valid, sr_metex14_parse,
 213                 NULL,
 214                 &voltcraft_m3650cr_driver_info, receive_data_VOLTCRAFT_M3650CR,
 215         },
 216         {
 217                 "Voltcraft", "M-3650D", "1200/7n2/rts=0/dtr=1", 1200,
 218                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 219                 sr_metex14_packet_valid, sr_metex14_parse,
 220                 NULL,
 221                 &voltcraft_m3650d_driver_info, receive_data_VOLTCRAFT_M3650D,
 222         },
 223         {
 224                 "Voltcraft", "M-4650CR", "1200/7n2/rts=0/dtr=1", 1200,
 225                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 226                 sr_metex14_packet_valid, sr_metex14_parse,
 227                 NULL,
 228                 &voltcraft_m4650cr_driver_info, receive_data_VOLTCRAFT_M4650CR,
 229         },
 230         {
 231                 "Voltcraft", "ME-42", "600/7n2/rts=0/dtr=1", 600,
 232                 METEX14_PACKET_SIZE, 250, 60, sr_metex14_packet_request,
 233                 sr_metex14_packet_valid, sr_metex14_parse,
 234                 NULL,
 235                 &voltcraft_me42_driver_info, receive_data_VOLTCRAFT_ME42,
 236         },
 237         {
 238                 "Voltcraft", "VC-820 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 239                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 240                 sr_fs9721_packet_valid, sr_fs9721_parse,
 241                 NULL,
 242                 &voltcraft_vc820_ser_driver_info,
 243                 receive_data_VOLTCRAFT_VC820_SER,
 244         },
 245         {
 246                 /*
 247                  * Note: The VC830 doesn't set the 'volt' and 'diode' bits of
 248                  * the FS9922 protocol. Instead, it only sets the user-defined
 249                  * bit "z1" to indicate "diode mode" and "voltage".
 250                  */
 251                 "Voltcraft", "VC-830 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 252                 2400, FS9922_PACKET_SIZE, 0, 0, NULL,
 253                 sr_fs9922_packet_valid, sr_fs9922_parse,
 254                 &sr_fs9922_z1_diode,
 255                 &voltcraft_vc830_ser_driver_info,
 256                 receive_data_VOLTCRAFT_VC830_SER,
 257         },
 258         {
 259                 "Voltcraft", "VC-840 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 260                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 261                 sr_fs9721_packet_valid, sr_fs9721_parse,
 262                 sr_fs9721_00_temp_c,
 263                 &voltcraft_vc840_ser_driver_info,
 264                 receive_data_VOLTCRAFT_VC840_SER,
 265         },
 266         {
 267                 "Voltcraft", "VC-920 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 268                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 269                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 270                 &voltcraft_vc920_ser_driver_info,
 271                 receive_data_VOLTCRAFT_VC920_SER,
 272         },
 273         {
 274                 "Voltcraft", "VC-940 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 275                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 276                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 277                 &voltcraft_vc940_ser_driver_info,
 278                 receive_data_VOLTCRAFT_VC940_SER,
 279         },
 280         {
 281                 "Voltcraft", "VC-960 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 282                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 283                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 284                 &voltcraft_vc960_ser_driver_info,
 285                 receive_data_VOLTCRAFT_VC960_SER,
 286         },
 287         {
 288                 "UNI-T", "UT60A (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 289                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 290                 sr_fs9721_packet_valid, sr_fs9721_parse,
 291                 NULL,
 292                 &uni_t_ut60a_ser_driver_info,
 293                 receive_data_UNI_T_UT60A_SER,
 294         },
 295         {
 296                 "UNI-T", "UT60E (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 297                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 298                 sr_fs9721_packet_valid, sr_fs9721_parse,
 299                 sr_fs9721_00_temp_c,
 300                 &uni_t_ut60e_ser_driver_info,
 301                 receive_data_UNI_T_UT60E_SER,
 302         },
 303         {
 304                 /* Note: ES51986 baudrate is actually 19230! */
 305                 "UNI-T", "UT60G (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 306                 19200, ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 307                 sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
 308                 NULL,
 309                 &uni_t_ut60g_ser_driver_info, receive_data_UNI_T_UT60G_SER,
 310         },
 311         {
 312                 "UNI-T", "UT61B (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 313                 2400, FS9922_PACKET_SIZE, 0, 0, NULL,
 314                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
 315                 &uni_t_ut61b_ser_driver_info, receive_data_UNI_T_UT61B_SER,
 316         },
 317         {
 318                 "UNI-T", "UT61C (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 319                 2400, FS9922_PACKET_SIZE, 0, 0, NULL,
 320                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
 321                 &uni_t_ut61c_ser_driver_info, receive_data_UNI_T_UT61C_SER,
 322         },
 323         {
 324                 "UNI-T", "UT61D (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 325                 2400, FS9922_PACKET_SIZE, 0, 0, NULL,
 326                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
 327                 &uni_t_ut61d_ser_driver_info, receive_data_UNI_T_UT61D_SER,
 328         },
 329         {
 330                 /* Note: ES51922 baudrate is actually 19230! */
 331                 "UNI-T", "UT61E (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 332                 19200, ES519XX_14B_PACKET_SIZE, 0, 0, NULL,
 333                 sr_es519xx_19200_14b_packet_valid, sr_es519xx_19200_14b_parse,
 334                 NULL,
 335                 &uni_t_ut61e_ser_driver_info, receive_data_UNI_T_UT61E_SER,
 336         },
 337         {
 338                 "UNI-T", "UT71A (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 339                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 340                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 341                 &uni_t_ut71a_ser_driver_info, receive_data_UNI_T_UT71A_SER,
 342         },
 343         {
 344                 "UNI-T", "UT71B (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 345                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 346                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 347                 &uni_t_ut71b_ser_driver_info, receive_data_UNI_T_UT71B_SER,
 348         },
 349         {
 350                 "UNI-T", "UT71C (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 351                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 352                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 353                 &uni_t_ut71c_ser_driver_info, receive_data_UNI_T_UT71C_SER,
 354         },
 355         {
 356                 "UNI-T", "UT71D (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 357                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 358                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 359                 &uni_t_ut71d_ser_driver_info, receive_data_UNI_T_UT71D_SER,
 360         },
 361         {
 362                 "UNI-T", "UT71E (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 363                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 364                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 365                 &uni_t_ut71e_ser_driver_info, receive_data_UNI_T_UT71E_SER,
 366         },
 367         {
 368                 "ISO-TECH", "IDM103N", "2400/7o1/rts=0/dtr=1",
 369                 2400, ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 370                 sr_es519xx_2400_11b_packet_valid, sr_es519xx_2400_11b_parse,
 371                 NULL,
 372                 &iso_tech_idm103n_driver_info, receive_data_ISO_TECH_IDM103N,
 373         },
 374         {
 375                 "Tenma", "72-7745 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 376                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 377                 sr_fs9721_packet_valid, sr_fs9721_parse,
 378                 sr_fs9721_00_temp_c,
 379                 &tenma_72_7745_ser_driver_info, receive_data_TENMA_72_7745_SER,
 380         },
 381         {
 382                 /* Note: ES51986 baudrate is actually 19230! */
 383                 "Tenma", "72-7750 (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 384                 19200, ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 385                 sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
 386                 NULL,
 387                 &tenma_72_7750_ser_driver_info, receive_data_TENMA_72_7750_SER,
 388         },
 389         {
 390                 "Brymen", "BM25x", "9600/8n1/rts=1/dtr=1",
 391                 9600, BRYMEN_BM25X_PACKET_SIZE, 0, 0, NULL,
 392                 sr_brymen_bm25x_packet_valid, sr_brymen_bm25x_parse,
 393                 NULL,
 394                 &brymen_bm25x_driver_info, receive_data_BRYMEN_BM25X,
 395         },
 396 };
 397
 398 static int dev_clear(int dmm)
 399 {
 400         return std_dev_clear(dmms[dmm].di, NULL);
 401 }
 402
 403 static int init(struct sr_context *sr_ctx, int dmm)
 404 {
 405         return std_init(sr_ctx, dmms[dmm].di, LOG_PREFIX);
 406 }
 407
 408 static GSList *sdmm_scan(const char *conn, const char *serialcomm, int dmm)
 409 {
 410         struct sr_dev_inst *sdi;
 411         struct drv_context *drvc;
 412         struct dev_context *devc;
 413         struct sr_channel *ch;
 414         struct sr_serial_dev_inst *serial;
 415         GSList *devices;
 416         int dropped, ret;
 417         size_t len;
 418         uint8_t buf[128];
 419
 420         serial = sr_serial_dev_inst_new(conn, serialcomm);
 421
 422         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 423                 return NULL;
 424
 425         sr_info("Probing serial port %s.", conn);
 426
 427         drvc = dmms[dmm].di->priv;
 428         devices = NULL;
 429         serial_flush(serial);
 430
 431         /* Request a packet if the DMM requires this. */
 432         if (dmms[dmm].packet_request) {
 433                 if ((ret = dmms[dmm].packet_request(serial)) < 0) {
 434                         sr_err("Failed to request packet: %d.", ret);
 435                         return FALSE;
 436                 }
 437         }
 438
 439         /*
 440          * There's no way to get an ID from the multimeter. It just sends data
 441          * periodically (or upon request), so the best we can do is check if
 442          * the packets match the expected format.
 443          */
 444
 445         /* Let's get a bit of data and see if we can find a packet. */
 446         len = sizeof(buf);
 447         ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
 448                                    dmms[dmm].packet_valid, 3000,
 449                                    dmms[dmm].baudrate);
 450         if (ret != SR_OK)
 451                 goto scan_cleanup;
 452
 453         /*
 454          * If we dropped more than two packets worth of data, something is
 455          * wrong. We shouldn't quit however, since the dropped bytes might be
 456          * just zeroes at the beginning of the stream. Those can occur as a
 457          * combination of the nonstandard cable that ships with some devices
 458          * and the serial port or USB to serial adapter.
 459          */
 460         dropped = len - dmms[dmm].packet_size;
 461         if (dropped > 2 * dmms[dmm].packet_size)
 462                 sr_warn("Had to drop too much data.");
 463
 464         sr_info("Found device on port %s.", conn);
 465
 466         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 467         sdi->status = SR_ST_INACTIVE;
 468         sdi->vendor = g_strdup(dmms[dmm].vendor);
 469         sdi->model = g_strdup(dmms[dmm].device);
 470         devc = g_malloc0(sizeof(struct dev_context));
 471         sdi->inst_type = SR_INST_SERIAL;
 472         sdi->conn = serial;
 473         sdi->priv = devc;
 474         sdi->driver = dmms[dmm].di;
 475         ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "P1");
 476         sdi->channels = g_slist_append(sdi->channels, ch);
 477         drvc->instances = g_slist_append(drvc->instances, sdi);
 478         devices = g_slist_append(devices, sdi);
 479
 480 scan_cleanup:
 481         serial_close(serial);
 482
 483         return devices;
 484 }
 485
 486 static GSList *scan(GSList *options, int dmm)
 487 {
 488         struct sr_config *src;
 489         GSList *l, *devices;
 490         const char *conn, *serialcomm;
 491
 492         conn = serialcomm = NULL;
 493         for (l = options; l; l = l->next) {
 494                 src = l->data;
 495                 switch (src->key) {
 496                 case SR_CONF_CONN:
 497                         conn = g_variant_get_string(src->data, NULL);
 498                         break;
 499                 case SR_CONF_SERIALCOMM:
 500                         serialcomm = g_variant_get_string(src->data, NULL);
 501                         break;
 502                 }
 503         }
 504         if (!conn)
 505                 return NULL;
 506
 507         if (serialcomm) {
 508                 /* Use the provided comm specs. */
 509                 devices = sdmm_scan(conn, serialcomm, dmm);
 510         } else {
 511                 /* Try the default. */
 512                 devices = sdmm_scan(conn, dmms[dmm].conn, dmm);
 513         }
 514
 515         return devices;
 516 }
 517
 518 static GSList *dev_list(int dmm)
 519 {
 520         return ((struct drv_context *)(dmms[dmm].di->priv))->instances;
 521 }
 522
 523 static int cleanup(int dmm)
 524 {
 525         return dev_clear(dmm);
 526 }
 527
 528 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 529                 const struct sr_channel_group *cg)
 530 {
 531         struct dev_context *devc;
 532
 533         (void)cg;
 534
 535         if (sdi->status != SR_ST_ACTIVE)
 536                 return SR_ERR_DEV_CLOSED;
 537
 538         if (!(devc = sdi->priv)) {
 539                 sr_err("sdi->priv was NULL.");
 540                 return SR_ERR_BUG;
 541         }
 542
 543         switch (key) {
 544         case SR_CONF_LIMIT_SAMPLES:
 545                 devc->limit_samples = g_variant_get_uint64(data);
 546                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 547                        devc->limit_samples);
 548                 break;
 549         case SR_CONF_LIMIT_MSEC:
 550                 devc->limit_msec = g_variant_get_uint64(data);
 551                 sr_dbg("Setting time limit to %" PRIu64 "ms.",
 552                        devc->limit_msec);
 553                 break;
 554         default:
 555                 return SR_ERR_NA;
 556         }
 557
 558         return SR_OK;
 559 }
 560
 561 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 562                 const struct sr_channel_group *cg)
 563 {
 564         (void)sdi;
 565         (void)cg;
 566
 567         switch (key) {
 568         case SR_CONF_SCAN_OPTIONS:
 569                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 570                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 571                 break;
 572         case SR_CONF_DEVICE_OPTIONS:
 573                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 574                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 575                 break;
 576         default:
 577                 return SR_ERR_NA;
 578         }
 579
 580         return SR_OK;
 581 }
 582
 583 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 584                                     void *cb_data, int dmm)
 585 {
 586         struct dev_context *devc;
 587         struct sr_serial_dev_inst *serial;
 588
 589         if (sdi->status != SR_ST_ACTIVE)
 590                 return SR_ERR_DEV_CLOSED;
 591
 592         if (!(devc = sdi->priv)) {
 593                 sr_err("sdi->priv was NULL.");
 594                 return SR_ERR_BUG;
 595         }
 596
 597         devc->cb_data = cb_data;
 598
 599         /*
 600          * Reset the number of samples to take. If we've already collected our
 601          * quota, but we start a new session, and don't reset this, we'll just
 602          * quit without acquiring any new samples.
 603          */
 604         devc->num_samples = 0;
 605         devc->starttime = g_get_monotonic_time();
 606
 607         /* Send header packet to the session bus. */
 608         std_session_send_df_header(cb_data, LOG_PREFIX);
 609
 610         /* Poll every 50ms, or whenever some data comes in. */
 611         serial = sdi->conn;
 612         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 613                       dmms[dmm].receive_data, (void *)sdi);
 614
 615         return SR_OK;
 616 }
 617
 618 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 619 {
 620         return std_serial_dev_acquisition_stop(sdi, cb_data, std_serial_dev_close,
 621                         sdi->conn, LOG_PREFIX);
 622 }
 623
 624 /* Driver-specific API function wrappers */
 625 #define HW_INIT(X) \
 626 static int init_##X(struct sr_context *sr_ctx) { return init(sr_ctx, X); }
 627 #define HW_CLEANUP(X) \
 628 static int cleanup_##X(void) { return cleanup(X); }
 629 #define HW_SCAN(X) \
 630 static GSList *scan_##X(GSList *options) { return scan(options, X); }
 631 #define HW_DEV_LIST(X) \
 632 static GSList *dev_list_##X(void) { return dev_list(X); }
 633 #define HW_DEV_CLEAR(X) \
 634 static int dev_clear_##X(void) { return dev_clear(X); }
 635 #define HW_DEV_ACQUISITION_START(X) \
 636 static int dev_acquisition_start_##X(const struct sr_dev_inst *sdi, \
 637 void *cb_data) { return dev_acquisition_start(sdi, cb_data, X); }
 638
 639 /* Driver structs and API function wrappers */
 640 #define DRV(ID, ID_UPPER, NAME, LONGNAME) \
 641 HW_INIT(ID_UPPER) \
 642 HW_CLEANUP(ID_UPPER) \
 643 HW_SCAN(ID_UPPER) \
 644 HW_DEV_LIST(ID_UPPER) \
 645 HW_DEV_CLEAR(ID_UPPER) \
 646 HW_DEV_ACQUISITION_START(ID_UPPER) \
 647 SR_PRIV struct sr_dev_driver ID##_driver_info = { \
 648         .name = NAME, \
 649         .longname = LONGNAME, \
 650         .api_version = 1, \
 651         .init = init_##ID_UPPER, \
 652         .cleanup = cleanup_##ID_UPPER, \
 653         .scan = scan_##ID_UPPER, \
 654         .dev_list = dev_list_##ID_UPPER, \
 655         .dev_clear = dev_clear_##ID_UPPER, \
 656         .config_get = NULL, \
 657         .config_set = config_set, \
 658         .config_list = config_list, \
 659         .dev_open = std_serial_dev_open, \
 660         .dev_close = std_serial_dev_close, \
 661         .dev_acquisition_start = dev_acquisition_start_##ID_UPPER, \
 662         .dev_acquisition_stop = dev_acquisition_stop, \
 663         .priv = NULL, \
 664 };
 665
 666 DRV(bbcgm_m2110, BBCGM_M2110, "bbcgm-m2110", "BBC Goertz Metrawatt M2110")
 667 DRV(digitek_dt4000zc, DIGITEK_DT4000ZC, "digitek-dt4000zc", "Digitek DT4000ZC")
 668 DRV(tekpower_tp4000zc, TEKPOWER_TP4000ZC, "tekpower-tp4000zc", "TekPower TP4000ZC")
 669 DRV(metex_me31, METEX_ME31, "metex-me31", "Metex ME-31")
 670 DRV(peaktech_3410, PEAKTECH_3410, "peaktech-3410", "PeakTech 3410")
 671 DRV(mastech_mas345, MASTECH_MAS345, "mastech-mas345", "MASTECH MAS345")
 672 DRV(mastech_ms8250b, MASTECH_MS8250B, "mastech-ms8250b", "MASTECH MS8250B")
 673 DRV(va_va18b, VA_VA18B, "va-va18b", "V&A VA18B")
 674 DRV(va_va40b, VA_VA40B, "va-va40b", "V&A VA40B")
 675 DRV(metex_m3640d, METEX_M3640D, "metex-m3640d", "Metex M-3640D")
 676 DRV(metex_m4650cr, METEX_M4650CR, "metex-m4650cr", "Metex M-4650CR")
 677 DRV(peaktech_4370, PEAKTECH_4370, "peaktech-4370", "PeakTech 4370")
 678 DRV(pce_pce_dm32, PCE_PCE_DM32, "pce-pce-dm32", "PCE PCE-DM32")
 679 DRV(radioshack_22_168, RADIOSHACK_22_168, "radioshack-22-168", "RadioShack 22-168")
 680 DRV(radioshack_22_805, RADIOSHACK_22_805, "radioshack-22-805", "RadioShack 22-805")
 681 DRV(radioshack_22_812, RADIOSHACK_22_812, "radioshack-22-812", "RadioShack 22-812")
 682 DRV(tecpel_dmm_8061_ser, TECPEL_DMM_8061_SER, "tecpel-dmm-8061-ser", "Tecpel DMM-8061 (UT-D02 cable)")
 683 DRV(voltcraft_m3650cr, VOLTCRAFT_M3650CR, "voltcraft-m3650cr", "Voltcraft M-3650CR")
 684 DRV(voltcraft_m3650d, VOLTCRAFT_M3650D, "voltcraft-m3650d", "Voltcraft M-3650D")
 685 DRV(voltcraft_m4650cr, VOLTCRAFT_M4650CR, "voltcraft-m4650cr", "Voltcraft M-4650CR")
 686 DRV(voltcraft_me42, VOLTCRAFT_ME42, "voltcraft-me42", "Voltcraft ME-42")
 687 DRV(voltcraft_vc820_ser, VOLTCRAFT_VC820_SER, "voltcraft-vc820-ser", "Voltcraft VC-820 (UT-D02 cable)")
 688 DRV(voltcraft_vc830_ser, VOLTCRAFT_VC830_SER, "voltcraft-vc830-ser", "Voltcraft VC-830 (UT-D02 cable)")
 689 DRV(voltcraft_vc840_ser, VOLTCRAFT_VC840_SER, "voltcraft-vc840-ser", "Voltcraft VC-840 (UT-D02 cable)")
 690 DRV(voltcraft_vc920_ser, VOLTCRAFT_VC920_SER, "voltcraft-vc920-ser", "Voltcraft VC-920 (UT-D02 cable)")
 691 DRV(voltcraft_vc940_ser, VOLTCRAFT_VC940_SER, "voltcraft-vc940-ser", "Voltcraft VC-940 (UT-D02 cable)")
 692 DRV(voltcraft_vc960_ser, VOLTCRAFT_VC960_SER, "voltcraft-vc960-ser", "Voltcraft VC-960 (UT-D02 cable)")
 693 DRV(uni_t_ut60a_ser, UNI_T_UT60A_SER, "uni-t-ut60a-ser", "UNI-T UT60A (UT-D02 cable)")
 694 DRV(uni_t_ut60e_ser, UNI_T_UT60E_SER, "uni-t-ut60e-ser", "UNI-T UT60E (UT-D02 cable)")
 695 DRV(uni_t_ut60g_ser, UNI_T_UT60G_SER, "uni-t-ut60g-ser", "UNI-T UT60G (UT-D02 cable)")
 696 DRV(uni_t_ut61b_ser, UNI_T_UT61B_SER, "uni-t-ut61b-ser", "UNI-T UT61B (UT-D02 cable)")
 697 DRV(uni_t_ut61c_ser, UNI_T_UT61C_SER, "uni-t-ut61c-ser", "UNI-T UT61C (UT-D02 cable)")
 698 DRV(uni_t_ut61d_ser, UNI_T_UT61D_SER, "uni-t-ut61d-ser", "UNI-T UT61D (UT-D02 cable)")
 699 DRV(uni_t_ut61e_ser, UNI_T_UT61E_SER, "uni-t-ut61e-ser", "UNI-T UT61E (UT-D02 cable)")
 700 DRV(uni_t_ut71a_ser, UNI_T_UT71A_SER, "uni-t-ut71a-ser", "UNI-T UT71A (UT-D02 cable)")
 701 DRV(uni_t_ut71b_ser, UNI_T_UT71B_SER, "uni-t-ut71b-ser", "UNI-T UT71B (UT-D02 cable)")
 702 DRV(uni_t_ut71c_ser, UNI_T_UT71C_SER, "uni-t-ut71c-ser", "UNI-T UT71C (UT-D02 cable)")
 703 DRV(uni_t_ut71d_ser, UNI_T_UT71D_SER, "uni-t-ut71d-ser", "UNI-T UT71D (UT-D02 cable)")
 704 DRV(uni_t_ut71e_ser, UNI_T_UT71E_SER, "uni-t-ut71e-ser", "UNI-T UT71E (UT-D02 cable)")
 705 DRV(iso_tech_idm103n, ISO_TECH_IDM103N, "iso-tech-idm103n", "ISO-TECH IDM103N")
 706 DRV(tenma_72_7745_ser, TENMA_72_7745_SER, "tenma-72-7745-ser", "Tenma 72-7745 (UT-D02 cable)")
 707 DRV(tenma_72_7750_ser, TENMA_72_7750_SER, "tenma-72-7750-ser", "Tenma 72-7750 (UT-D02 cable)")
 708 DRV(brymen_bm25x, BRYMEN_BM25X, "brymen-bm25x", "Brymen BM25x")