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 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_m3650cr_driver_info;
  61 SR_PRIV struct sr_dev_driver voltcraft_m3650d_driver_info;
  62 SR_PRIV struct sr_dev_driver voltcraft_m4650cr_driver_info;
  63 SR_PRIV struct sr_dev_driver voltcraft_me42_driver_info;
  64 SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
  65 SR_PRIV struct sr_dev_driver voltcraft_vc830_ser_driver_info;
  66 SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
  67 SR_PRIV struct sr_dev_driver voltcraft_vc920_ser_driver_info;
  68 SR_PRIV struct sr_dev_driver voltcraft_vc940_ser_driver_info;
  69 SR_PRIV struct sr_dev_driver voltcraft_vc960_ser_driver_info;
  70 SR_PRIV struct sr_dev_driver uni_t_ut60a_ser_driver_info;
  71 SR_PRIV struct sr_dev_driver uni_t_ut60e_ser_driver_info;
  72 SR_PRIV struct sr_dev_driver uni_t_ut60g_ser_driver_info;
  73 SR_PRIV struct sr_dev_driver uni_t_ut61b_ser_driver_info;
  74 SR_PRIV struct sr_dev_driver uni_t_ut61c_ser_driver_info;
  75 SR_PRIV struct sr_dev_driver uni_t_ut61d_ser_driver_info;
  76 SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;
  77 SR_PRIV struct sr_dev_driver uni_t_ut71a_ser_driver_info;
  78 SR_PRIV struct sr_dev_driver uni_t_ut71b_ser_driver_info;
  79 SR_PRIV struct sr_dev_driver uni_t_ut71c_ser_driver_info;
  80 SR_PRIV struct sr_dev_driver uni_t_ut71d_ser_driver_info;
  81 SR_PRIV struct sr_dev_driver uni_t_ut71e_ser_driver_info;
  82 SR_PRIV struct sr_dev_driver iso_tech_idm103n_driver_info;
  83 SR_PRIV struct sr_dev_driver tenma_72_7745_ser_driver_info;
  84 SR_PRIV struct sr_dev_driver tenma_72_7750_ser_driver_info;
  85 SR_PRIV struct sr_dev_driver brymen_bm25x_driver_info;
  86
  87 SR_PRIV struct dmm_info dmms[] = {
  88         {
  89                 "BBC Goertz Metrawatt", "M2110", "1200/7n2", 1200,
  90                 BBCGM_M2110_PACKET_SIZE, 0, 0, NULL,
  91                 sr_m2110_packet_valid, sr_m2110_parse,
  92                 NULL,
  93                 &bbcgm_m2110_driver_info, receive_data_BBCGM_M2110,
  94         },
  95         {
  96                 "Digitek", "DT4000ZC", "2400/8n1/dtr=1", 2400,
  97                 FS9721_PACKET_SIZE, 0, 0, NULL,
  98                 sr_fs9721_packet_valid, sr_fs9721_parse,
  99                 sr_fs9721_10_temp_c,
 100                 &digitek_dt4000zc_driver_info, receive_data_DIGITEK_DT4000ZC,
 101         },
 102         {
 103                 "TekPower", "TP4000ZC", "2400/8n1/dtr=1", 2400,
 104                 FS9721_PACKET_SIZE, 0, 0, NULL,
 105                 sr_fs9721_packet_valid, sr_fs9721_parse,
 106                 sr_fs9721_10_temp_c,
 107                 &tekpower_tp4000zc_driver_info, receive_data_TEKPOWER_TP4000ZC,
 108         },
 109         {
 110                 "Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
 111                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 112                 sr_metex14_packet_valid, sr_metex14_parse,
 113                 NULL,
 114                 &metex_me31_driver_info, receive_data_METEX_ME31,
 115         },
 116         {
 117                 "Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
 118                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 119                 sr_metex14_packet_valid, sr_metex14_parse,
 120                 NULL,
 121                 &peaktech_3410_driver_info, receive_data_PEAKTECH_3410,
 122         },
 123         {
 124                 "MASTECH", "MAS345", "600/7n2/rts=0/dtr=1", 600,
 125                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 126                 sr_metex14_packet_valid, sr_metex14_parse,
 127                 NULL,
 128                 &mastech_mas345_driver_info, receive_data_MASTECH_MAS345,
 129         },
 130         {
 131                 "V&A", "VA18B", "2400/8n1", 2400,
 132                 FS9721_PACKET_SIZE, 0, 0, NULL,
 133                 sr_fs9721_packet_valid, sr_fs9721_parse,
 134                 sr_fs9721_01_temp_c,
 135                 &va_va18b_driver_info, receive_data_VA_VA18B,
 136         },
 137         {
 138                 "V&A", "VA40B", "2400/8n1", 2400,
 139                 FS9721_PACKET_SIZE, 0, 0, NULL,
 140                 sr_fs9721_packet_valid, sr_fs9721_parse,
 141                 sr_fs9721_max_c_min,
 142                 &va_va40b_driver_info, receive_data_VA_VA40B,
 143         },
 144         {
 145                 "Metex", "M-3640D", "1200/7n2/rts=0/dtr=1", 1200,
 146                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 147                 sr_metex14_packet_valid, sr_metex14_parse,
 148                 NULL,
 149                 &metex_m3640d_driver_info, receive_data_METEX_M3640D,
 150         },
 151         {
 152                 "Metex", "M-4650CR", "1200/7n2/rts=0/dtr=1", 1200,
 153                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 154                 sr_metex14_packet_valid, sr_metex14_parse,
 155                 NULL,
 156                 &metex_m4650cr_driver_info, receive_data_METEX_M4650CR,
 157         },
 158         {
 159                 "PeakTech", "4370", "1200/7n2/rts=0/dtr=1", 1200,
 160                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 161                 sr_metex14_packet_valid, sr_metex14_parse,
 162                 NULL,
 163                 &peaktech_4370_driver_info, receive_data_PEAKTECH_4370,
 164         },
 165         {
 166                 "PCE", "PCE-DM32", "2400/8n1", 2400,
 167                 FS9721_PACKET_SIZE, 0, 0, NULL,
 168                 sr_fs9721_packet_valid, sr_fs9721_parse,
 169                 sr_fs9721_01_10_temp_f_c,
 170                 &pce_pce_dm32_driver_info, receive_data_PCE_PCE_DM32,
 171         },
 172         {
 173                 "RadioShack", "22-168", "1200/7n2/rts=0/dtr=1", 1200,
 174                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 175                 sr_metex14_packet_valid, sr_metex14_parse,
 176                 NULL,
 177                 &radioshack_22_168_driver_info, receive_data_RADIOSHACK_22_168,
 178         },
 179         {
 180                 "RadioShack", "22-805", "600/7n2/rts=0/dtr=1", 600,
 181                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 182                 sr_metex14_packet_valid, sr_metex14_parse,
 183                 NULL,
 184                 &radioshack_22_805_driver_info, receive_data_RADIOSHACK_22_805,
 185         },
 186         {
 187                 "RadioShack", "22-812", "4800/8n1/rts=0/dtr=1", 4800,
 188                 RS9LCD_PACKET_SIZE, 0, 0, NULL,
 189                 sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
 190                 NULL,
 191                 &radioshack_22_812_driver_info, receive_data_RADIOSHACK_22_812,
 192         },
 193         {
 194                 "Tecpel", "DMM-8061 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 195                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 196                 sr_fs9721_packet_valid, sr_fs9721_parse,
 197                 sr_fs9721_00_temp_c,
 198                 &tecpel_dmm_8061_ser_driver_info,
 199                 receive_data_TECPEL_DMM_8061_SER,
 200         },
 201         {
 202                 "Voltcraft", "M-3650CR", "1200/7n2/rts=0/dtr=1", 1200,
 203                 METEX14_PACKET_SIZE, 150, 20, sr_metex14_packet_request,
 204                 sr_metex14_packet_valid, sr_metex14_parse,
 205                 NULL,
 206                 &voltcraft_m3650cr_driver_info, receive_data_VOLTCRAFT_M3650CR,
 207         },
 208         {
 209                 "Voltcraft", "M-3650D", "1200/7n2/rts=0/dtr=1", 1200,
 210                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 211                 sr_metex14_packet_valid, sr_metex14_parse,
 212                 NULL,
 213                 &voltcraft_m3650d_driver_info, receive_data_VOLTCRAFT_M3650D,
 214         },
 215         {
 216                 "Voltcraft", "M-4650CR", "1200/7n2/rts=0/dtr=1", 1200,
 217                 METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
 218                 sr_metex14_packet_valid, sr_metex14_parse,
 219                 NULL,
 220                 &voltcraft_m4650cr_driver_info, receive_data_VOLTCRAFT_M4650CR,
 221         },
 222         {
 223                 "Voltcraft", "ME-42", "600/7n2/rts=0/dtr=1", 600,
 224                 METEX14_PACKET_SIZE, 250, 60, sr_metex14_packet_request,
 225                 sr_metex14_packet_valid, sr_metex14_parse,
 226                 NULL,
 227                 &voltcraft_me42_driver_info, receive_data_VOLTCRAFT_ME42,
 228         },
 229         {
 230                 "Voltcraft", "VC-820 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 231                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 232                 sr_fs9721_packet_valid, sr_fs9721_parse,
 233                 NULL,
 234                 &voltcraft_vc820_ser_driver_info,
 235                 receive_data_VOLTCRAFT_VC820_SER,
 236         },
 237         {
 238                 /*
 239                  * Note: The VC830 doesn't set the 'volt' and 'diode' bits of
 240                  * the FS9922 protocol. Instead, it only sets the user-defined
 241                  * bit "z1" to indicate "diode mode" and "voltage".
 242                  */
 243                 "Voltcraft", "VC-830 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 244                 2400, FS9922_PACKET_SIZE, 0, 0, NULL,
 245                 sr_fs9922_packet_valid, sr_fs9922_parse,
 246                 &sr_fs9922_z1_diode,
 247                 &voltcraft_vc830_ser_driver_info,
 248                 receive_data_VOLTCRAFT_VC830_SER,
 249         },
 250         {
 251                 "Voltcraft", "VC-840 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 252                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 253                 sr_fs9721_packet_valid, sr_fs9721_parse,
 254                 sr_fs9721_00_temp_c,
 255                 &voltcraft_vc840_ser_driver_info,
 256                 receive_data_VOLTCRAFT_VC840_SER,
 257         },
 258         {
 259                 "Voltcraft", "VC-920 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 260                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 261                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 262                 &voltcraft_vc920_ser_driver_info,
 263                 receive_data_VOLTCRAFT_VC920_SER,
 264         },
 265         {
 266                 "Voltcraft", "VC-940 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 267                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 268                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 269                 &voltcraft_vc940_ser_driver_info,
 270                 receive_data_VOLTCRAFT_VC940_SER,
 271         },
 272         {
 273                 "Voltcraft", "VC-960 (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 274                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 275                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 276                 &voltcraft_vc960_ser_driver_info,
 277                 receive_data_VOLTCRAFT_VC960_SER,
 278         },
 279         {
 280                 "UNI-T", "UT60A (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 281                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 282                 sr_fs9721_packet_valid, sr_fs9721_parse,
 283                 NULL,
 284                 &uni_t_ut60a_ser_driver_info,
 285                 receive_data_UNI_T_UT60A_SER,
 286         },
 287         {
 288                 "UNI-T", "UT60E (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                 sr_fs9721_00_temp_c,
 292                 &uni_t_ut60e_ser_driver_info,
 293                 receive_data_UNI_T_UT60E_SER,
 294         },
 295         {
 296                 /* Note: ES51986 baudrate is actually 19230! */
 297                 "UNI-T", "UT60G (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 298                 19200, ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 299                 sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
 300                 NULL,
 301                 &uni_t_ut60g_ser_driver_info, receive_data_UNI_T_UT60G_SER,
 302         },
 303         {
 304                 "UNI-T", "UT61B (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 305                 2400, FS9922_PACKET_SIZE, 0, 0, NULL,
 306                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
 307                 &uni_t_ut61b_ser_driver_info, receive_data_UNI_T_UT61B_SER,
 308         },
 309         {
 310                 "UNI-T", "UT61C (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 311                 2400, FS9922_PACKET_SIZE, 0, 0, NULL,
 312                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
 313                 &uni_t_ut61c_ser_driver_info, receive_data_UNI_T_UT61C_SER,
 314         },
 315         {
 316                 "UNI-T", "UT61D (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 317                 2400, FS9922_PACKET_SIZE, 0, 0, NULL,
 318                 sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
 319                 &uni_t_ut61d_ser_driver_info, receive_data_UNI_T_UT61D_SER,
 320         },
 321         {
 322                 /* Note: ES51922 baudrate is actually 19230! */
 323                 "UNI-T", "UT61E (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 324                 19200, ES519XX_14B_PACKET_SIZE, 0, 0, NULL,
 325                 sr_es519xx_19200_14b_packet_valid, sr_es519xx_19200_14b_parse,
 326                 NULL,
 327                 &uni_t_ut61e_ser_driver_info, receive_data_UNI_T_UT61E_SER,
 328         },
 329         {
 330                 "UNI-T", "UT71A (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 331                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 332                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 333                 &uni_t_ut71a_ser_driver_info, receive_data_UNI_T_UT71A_SER,
 334         },
 335         {
 336                 "UNI-T", "UT71B (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 337                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 338                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 339                 &uni_t_ut71b_ser_driver_info, receive_data_UNI_T_UT71B_SER,
 340         },
 341         {
 342                 "UNI-T", "UT71C (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 343                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 344                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 345                 &uni_t_ut71c_ser_driver_info, receive_data_UNI_T_UT71C_SER,
 346         },
 347         {
 348                 "UNI-T", "UT71D (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 349                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 350                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 351                 &uni_t_ut71d_ser_driver_info, receive_data_UNI_T_UT71D_SER,
 352         },
 353         {
 354                 "UNI-T", "UT71E (UT-D02 cable)", "2400/7o1/rts=0/dtr=1",
 355                 2400, UT71X_PACKET_SIZE, 0, 0, NULL,
 356                 sr_ut71x_packet_valid, sr_ut71x_parse, NULL,
 357                 &uni_t_ut71e_ser_driver_info, receive_data_UNI_T_UT71E_SER,
 358         },
 359         {
 360                 "ISO-TECH", "IDM103N", "2400/7o1/rts=0/dtr=1",
 361                 2400, ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 362                 sr_es519xx_2400_11b_packet_valid, sr_es519xx_2400_11b_parse,
 363                 NULL,
 364                 &iso_tech_idm103n_driver_info, receive_data_ISO_TECH_IDM103N,
 365         },
 366         {
 367                 "Tenma", "72-7745 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
 368                 2400, FS9721_PACKET_SIZE, 0, 0, NULL,
 369                 sr_fs9721_packet_valid, sr_fs9721_parse,
 370                 sr_fs9721_00_temp_c,
 371                 &tenma_72_7745_ser_driver_info, receive_data_TENMA_72_7745_SER,
 372         },
 373         {
 374                 /* Note: ES51986 baudrate is actually 19230! */
 375                 "Tenma", "72-7750 (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
 376                 19200, ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
 377                 sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
 378                 NULL,
 379                 &tenma_72_7750_ser_driver_info, receive_data_TENMA_72_7750_SER,
 380         },
 381         {
 382                 "Brymen", "BM25x", "9600/8n1/rts=1/dtr=1",
 383                 9600, BRYMEN_BM25X_PACKET_SIZE, 0, 0, NULL,
 384                 sr_brymen_bm25x_packet_valid, sr_brymen_bm25x_parse,
 385                 NULL,
 386                 &brymen_bm25x_driver_info, receive_data_BRYMEN_BM25X,
 387         },
 388 };
 389
 390 static int dev_clear(int dmm)
 391 {
 392         return std_dev_clear(dmms[dmm].di, NULL);
 393 }
 394
 395 static int init(struct sr_context *sr_ctx, int dmm)
 396 {
 397         return std_init(sr_ctx, dmms[dmm].di, LOG_PREFIX);
 398 }
 399
 400 static GSList *sdmm_scan(const char *conn, const char *serialcomm, int dmm)
 401 {
 402         struct sr_dev_inst *sdi;
 403         struct drv_context *drvc;
 404         struct dev_context *devc;
 405         struct sr_channel *ch;
 406         struct sr_serial_dev_inst *serial;
 407         GSList *devices;
 408         int dropped, ret;
 409         size_t len;
 410         uint8_t buf[128];
 411
 412         serial = sr_serial_dev_inst_new(conn, serialcomm);
 413
 414         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 415                 return NULL;
 416
 417         sr_info("Probing serial port %s.", conn);
 418
 419         drvc = dmms[dmm].di->priv;
 420         devices = NULL;
 421         serial_flush(serial);
 422
 423         /* Request a packet if the DMM requires this. */
 424         if (dmms[dmm].packet_request) {
 425                 if ((ret = dmms[dmm].packet_request(serial)) < 0) {
 426                         sr_err("Failed to request packet: %d.", ret);
 427                         return FALSE;
 428                 }
 429         }
 430
 431         /*
 432          * There's no way to get an ID from the multimeter. It just sends data
 433          * periodically (or upon request), so the best we can do is check if
 434          * the packets match the expected format.
 435          */
 436
 437         /* Let's get a bit of data and see if we can find a packet. */
 438         len = sizeof(buf);
 439         ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
 440                                    dmms[dmm].packet_valid, 3000,
 441                                    dmms[dmm].baudrate);
 442         if (ret != SR_OK)
 443                 goto scan_cleanup;
 444
 445         /*
 446          * If we dropped more than two packets worth of data, something is
 447          * wrong. We shouldn't quit however, since the dropped bytes might be
 448          * just zeroes at the beginning of the stream. Those can occur as a
 449          * combination of the nonstandard cable that ships with some devices
 450          * and the serial port or USB to serial adapter.
 451          */
 452         dropped = len - dmms[dmm].packet_size;
 453         if (dropped > 2 * dmms[dmm].packet_size)
 454                 sr_warn("Had to drop too much data.");
 455
 456         sr_info("Found device on port %s.", conn);
 457
 458         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 459         sdi->status = SR_ST_INACTIVE;
 460         sdi->vendor = g_strdup(dmms[dmm].vendor);
 461         sdi->model = g_strdup(dmms[dmm].device);
 462         devc = g_malloc0(sizeof(struct dev_context));
 463         sdi->inst_type = SR_INST_SERIAL;
 464         sdi->conn = serial;
 465         sdi->priv = devc;
 466         sdi->driver = dmms[dmm].di;
 467         ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "P1");
 468         sdi->channels = g_slist_append(sdi->channels, ch);
 469         drvc->instances = g_slist_append(drvc->instances, sdi);
 470         devices = g_slist_append(devices, sdi);
 471
 472 scan_cleanup:
 473         serial_close(serial);
 474
 475         return devices;
 476 }
 477
 478 static GSList *scan(GSList *options, int dmm)
 479 {
 480         struct sr_config *src;
 481         GSList *l, *devices;
 482         const char *conn, *serialcomm;
 483
 484         conn = serialcomm = NULL;
 485         for (l = options; l; l = l->next) {
 486                 src = l->data;
 487                 switch (src->key) {
 488                 case SR_CONF_CONN:
 489                         conn = g_variant_get_string(src->data, NULL);
 490                         break;
 491                 case SR_CONF_SERIALCOMM:
 492                         serialcomm = g_variant_get_string(src->data, NULL);
 493                         break;
 494                 }
 495         }
 496         if (!conn)
 497                 return NULL;
 498
 499         if (serialcomm) {
 500                 /* Use the provided comm specs. */
 501                 devices = sdmm_scan(conn, serialcomm, dmm);
 502         } else {
 503                 /* Try the default. */
 504                 devices = sdmm_scan(conn, dmms[dmm].conn, dmm);
 505         }
 506
 507         return devices;
 508 }
 509
 510 static GSList *dev_list(int dmm)
 511 {
 512         return ((struct drv_context *)(dmms[dmm].di->priv))->instances;
 513 }
 514
 515 static int cleanup(int dmm)
 516 {
 517         return dev_clear(dmm);
 518 }
 519
 520 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 521                 const struct sr_channel_group *cg)
 522 {
 523         struct dev_context *devc;
 524
 525         (void)cg;
 526
 527         if (sdi->status != SR_ST_ACTIVE)
 528                 return SR_ERR_DEV_CLOSED;
 529
 530         if (!(devc = sdi->priv)) {
 531                 sr_err("sdi->priv was NULL.");
 532                 return SR_ERR_BUG;
 533         }
 534
 535         switch (key) {
 536         case SR_CONF_LIMIT_SAMPLES:
 537                 devc->limit_samples = g_variant_get_uint64(data);
 538                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 539                        devc->limit_samples);
 540                 break;
 541         case SR_CONF_LIMIT_MSEC:
 542                 devc->limit_msec = g_variant_get_uint64(data);
 543                 sr_dbg("Setting time limit to %" PRIu64 "ms.",
 544                        devc->limit_msec);
 545                 break;
 546         default:
 547                 return SR_ERR_NA;
 548         }
 549
 550         return SR_OK;
 551 }
 552
 553 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 554                 const struct sr_channel_group *cg)
 555 {
 556         (void)sdi;
 557         (void)cg;
 558
 559         switch (key) {
 560         case SR_CONF_SCAN_OPTIONS:
 561                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 562                                 scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
 563                 break;
 564         case SR_CONF_DEVICE_OPTIONS:
 565                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 566                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 567                 break;
 568         default:
 569                 return SR_ERR_NA;
 570         }
 571
 572         return SR_OK;
 573 }
 574
 575 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 576                                     void *cb_data, int dmm)
 577 {
 578         struct dev_context *devc;
 579         struct sr_serial_dev_inst *serial;
 580
 581         if (sdi->status != SR_ST_ACTIVE)
 582                 return SR_ERR_DEV_CLOSED;
 583
 584         if (!(devc = sdi->priv)) {
 585                 sr_err("sdi->priv was NULL.");
 586                 return SR_ERR_BUG;
 587         }
 588
 589         devc->cb_data = cb_data;
 590
 591         /*
 592          * Reset the number of samples to take. If we've already collected our
 593          * quota, but we start a new session, and don't reset this, we'll just
 594          * quit without acquiring any new samples.
 595          */
 596         devc->num_samples = 0;
 597         devc->starttime = g_get_monotonic_time();
 598
 599         /* Send header packet to the session bus. */
 600         std_session_send_df_header(cb_data, LOG_PREFIX);
 601
 602         /* Poll every 50ms, or whenever some data comes in. */
 603         serial = sdi->conn;
 604         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 605                       dmms[dmm].receive_data, (void *)sdi);
 606
 607         return SR_OK;
 608 }
 609
 610 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 611 {
 612         return std_serial_dev_acquisition_stop(sdi, cb_data, std_serial_dev_close,
 613                         sdi->conn, LOG_PREFIX);
 614 }
 615
 616 /* Driver-specific API function wrappers */
 617 #define HW_INIT(X) \
 618 static int init_##X(struct sr_context *sr_ctx) { return init(sr_ctx, X); }
 619 #define HW_CLEANUP(X) \
 620 static int cleanup_##X(void) { return cleanup(X); }
 621 #define HW_SCAN(X) \
 622 static GSList *scan_##X(GSList *options) { return scan(options, X); }
 623 #define HW_DEV_LIST(X) \
 624 static GSList *dev_list_##X(void) { return dev_list(X); }
 625 #define HW_DEV_CLEAR(X) \
 626 static int dev_clear_##X(void) { return dev_clear(X); }
 627 #define HW_DEV_ACQUISITION_START(X) \
 628 static int dev_acquisition_start_##X(const struct sr_dev_inst *sdi, \
 629 void *cb_data) { return dev_acquisition_start(sdi, cb_data, X); }
 630
 631 /* Driver structs and API function wrappers */
 632 #define DRV(ID, ID_UPPER, NAME, LONGNAME) \
 633 HW_INIT(ID_UPPER) \
 634 HW_CLEANUP(ID_UPPER) \
 635 HW_SCAN(ID_UPPER) \
 636 HW_DEV_LIST(ID_UPPER) \
 637 HW_DEV_CLEAR(ID_UPPER) \
 638 HW_DEV_ACQUISITION_START(ID_UPPER) \
 639 SR_PRIV struct sr_dev_driver ID##_driver_info = { \
 640         .name = NAME, \
 641         .longname = LONGNAME, \
 642         .api_version = 1, \
 643         .init = init_##ID_UPPER, \
 644         .cleanup = cleanup_##ID_UPPER, \
 645         .scan = scan_##ID_UPPER, \
 646         .dev_list = dev_list_##ID_UPPER, \
 647         .dev_clear = dev_clear_##ID_UPPER, \
 648         .config_get = NULL, \
 649         .config_set = config_set, \
 650         .config_list = config_list, \
 651         .dev_open = std_serial_dev_open, \
 652         .dev_close = std_serial_dev_close, \
 653         .dev_acquisition_start = dev_acquisition_start_##ID_UPPER, \
 654         .dev_acquisition_stop = dev_acquisition_stop, \
 655         .priv = NULL, \
 656 };
 657
 658 DRV(bbcgm_m2110, BBCGM_M2110, "bbcgm-m2110", "BBC Goertz Metrawatt M2110")
 659 DRV(digitek_dt4000zc, DIGITEK_DT4000ZC, "digitek-dt4000zc", "Digitek DT4000ZC")
 660 DRV(tekpower_tp4000zc, TEKPOWER_TP4000ZC, "tekpower-tp4000zc", "TekPower TP4000ZC")
 661 DRV(metex_me31, METEX_ME31, "metex-me31", "Metex ME-31")
 662 DRV(peaktech_3410, PEAKTECH_3410, "peaktech-3410", "PeakTech 3410")
 663 DRV(mastech_mas345, MASTECH_MAS345, "mastech-mas345", "MASTECH MAS345")
 664 DRV(va_va18b, VA_VA18B, "va-va18b", "V&A VA18B")
 665 DRV(va_va40b, VA_VA40B, "va-va40b", "V&A VA40B")
 666 DRV(metex_m3640d, METEX_M3640D, "metex-m3640d", "Metex M-3640D")
 667 DRV(metex_m4650cr, METEX_M4650CR, "metex-m4650cr", "Metex M-4650CR")
 668 DRV(peaktech_4370, PEAKTECH_4370, "peaktech-4370", "PeakTech 4370")
 669 DRV(pce_pce_dm32, PCE_PCE_DM32, "pce-pce-dm32", "PCE PCE-DM32")
 670 DRV(radioshack_22_168, RADIOSHACK_22_168, "radioshack-22-168", "RadioShack 22-168")
 671 DRV(radioshack_22_805, RADIOSHACK_22_805, "radioshack-22-805", "RadioShack 22-805")
 672 DRV(radioshack_22_812, RADIOSHACK_22_812, "radioshack-22-812", "RadioShack 22-812")
 673 DRV(tecpel_dmm_8061_ser, TECPEL_DMM_8061_SER, "tecpel-dmm-8061-ser", "Tecpel DMM-8061 (UT-D02 cable)")
 674 DRV(voltcraft_m3650cr, VOLTCRAFT_M3650CR, "voltcraft-m3650cr", "Voltcraft M-3650CR")
 675 DRV(voltcraft_m3650d, VOLTCRAFT_M3650D, "voltcraft-m3650d", "Voltcraft M-3650D")
 676 DRV(voltcraft_m4650cr, VOLTCRAFT_M4650CR, "voltcraft-m4650cr", "Voltcraft M-4650CR")
 677 DRV(voltcraft_me42, VOLTCRAFT_ME42, "voltcraft-me42", "Voltcraft ME-42")
 678 DRV(voltcraft_vc820_ser, VOLTCRAFT_VC820_SER, "voltcraft-vc820-ser", "Voltcraft VC-820 (UT-D02 cable)")
 679 DRV(voltcraft_vc830_ser, VOLTCRAFT_VC830_SER, "voltcraft-vc830-ser", "Voltcraft VC-830 (UT-D02 cable)")
 680 DRV(voltcraft_vc840_ser, VOLTCRAFT_VC840_SER, "voltcraft-vc840-ser", "Voltcraft VC-840 (UT-D02 cable)")
 681 DRV(voltcraft_vc920_ser, VOLTCRAFT_VC920_SER, "voltcraft-vc920-ser", "Voltcraft VC-920 (UT-D02 cable)")
 682 DRV(voltcraft_vc940_ser, VOLTCRAFT_VC940_SER, "voltcraft-vc940-ser", "Voltcraft VC-940 (UT-D02 cable)")
 683 DRV(voltcraft_vc960_ser, VOLTCRAFT_VC960_SER, "voltcraft-vc960-ser", "Voltcraft VC-960 (UT-D02 cable)")
 684 DRV(uni_t_ut60a_ser, UNI_T_UT60A_SER, "uni-t-ut60a-ser", "UNI-T UT60A (UT-D02 cable)")
 685 DRV(uni_t_ut60e_ser, UNI_T_UT60E_SER, "uni-t-ut60e-ser", "UNI-T UT60E (UT-D02 cable)")
 686 DRV(uni_t_ut60g_ser, UNI_T_UT60G_SER, "uni-t-ut60g-ser", "UNI-T UT60G (UT-D02 cable)")
 687 DRV(uni_t_ut61b_ser, UNI_T_UT61B_SER, "uni-t-ut61b-ser", "UNI-T UT61B (UT-D02 cable)")
 688 DRV(uni_t_ut61c_ser, UNI_T_UT61C_SER, "uni-t-ut61c-ser", "UNI-T UT61C (UT-D02 cable)")
 689 DRV(uni_t_ut61d_ser, UNI_T_UT61D_SER, "uni-t-ut61d-ser", "UNI-T UT61D (UT-D02 cable)")
 690 DRV(uni_t_ut61e_ser, UNI_T_UT61E_SER, "uni-t-ut61e-ser", "UNI-T UT61E (UT-D02 cable)")
 691 DRV(uni_t_ut71a_ser, UNI_T_UT71A_SER, "uni-t-ut71a-ser", "UNI-T UT71A (UT-D02 cable)")
 692 DRV(uni_t_ut71b_ser, UNI_T_UT71B_SER, "uni-t-ut71b-ser", "UNI-T UT71B (UT-D02 cable)")
 693 DRV(uni_t_ut71c_ser, UNI_T_UT71C_SER, "uni-t-ut71c-ser", "UNI-T UT71C (UT-D02 cable)")
 694 DRV(uni_t_ut71d_ser, UNI_T_UT71D_SER, "uni-t-ut71d-ser", "UNI-T UT71D (UT-D02 cable)")
 695 DRV(uni_t_ut71e_ser, UNI_T_UT71E_SER, "uni-t-ut71e-ser", "UNI-T UT71E (UT-D02 cable)")
 696 DRV(iso_tech_idm103n, ISO_TECH_IDM103N, "iso-tech-idm103n", "ISO-TECH IDM103N")
 697 DRV(tenma_72_7745_ser, TENMA_72_7745_SER, "tenma-72-7745-ser", "Tenma 72-7745 (UT-D02 cable)")
 698 DRV(tenma_72_7750_ser, TENMA_72_7750_SER, "tenma-72-7750-ser", "Tenma 72-7750 (UT-D02 cable)")
 699 DRV(brymen_bm25x, BRYMEN_BM25X, "brymen-bm25x", "Brymen BM25x")