hardware/serial-dmm/api.c

   1 /*
   2  * This file is part of the sigrok 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 <glib.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <fcntl.h>
  26 #include <string.h>
  27 #include <errno.h>
  28 #include "libsigrok.h"
  29 #include "libsigrok-internal.h"
  30 #include "protocol.h"
  31
  32 static const int hwopts[] = {
  33         SR_HWOPT_CONN,
  34         SR_HWOPT_SERIALCOMM,
  35         0,
  36 };
  37
  38 static const int hwcaps[] = {
  39         SR_HWCAP_MULTIMETER,
  40         SR_HWCAP_LIMIT_SAMPLES,
  41         SR_HWCAP_CONTINUOUS,
  42         0,
  43 };
  44
  45 static const char *probe_names[] = {
  46         "Probe",
  47         NULL,
  48 };
  49
  50 SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
  51 SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
  52 SR_PRIV struct sr_dev_driver metex_me31_driver_info;
  53 SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
  54 SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
  55 SR_PRIV struct sr_dev_driver va_va18b_driver_info;
  56 SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
  57 SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
  58 SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
  59 SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
  60 SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
  61
  62 /* After hw_init() this will point to a device-specific entry (see above). */
  63 static struct sr_dev_driver *di = NULL;
  64
  65 SR_PRIV struct dmm_info dmms[] = {
  66         {
  67                 "Digitek", "DT4000ZC", "2400/8n1", 2400,
  68                 FS9721_PACKET_SIZE, NULL,
  69                 sr_fs9721_packet_valid, sr_fs9721_parse,
  70                 dmm_details_dt4000zc,
  71                 &digitek_dt4000zc_driver_info, receive_data_DIGITEK_DT4000ZC,
  72         },
  73         {
  74                 "TekPower", "TP4000ZC", "2400/8n1", 2400,
  75                 FS9721_PACKET_SIZE, NULL,
  76                 sr_fs9721_packet_valid, sr_fs9721_parse,
  77                 dmm_details_tp4000zc,
  78                 &tekpower_tp4000zc_driver_info, receive_data_TEKPOWER_TP4000ZC,
  79         },
  80         {
  81                 "Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
  82                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
  83                 sr_metex14_packet_valid, sr_metex14_parse,
  84                 NULL,
  85                 &metex_me31_driver_info, receive_data_METEX_ME31,
  86         },
  87         {
  88                 "Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
  89                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
  90                 sr_metex14_packet_valid, sr_metex14_parse,
  91                 NULL,
  92                 &peaktech_3410_driver_info, receive_data_PEAKTECH_3410,
  93         },
  94         {
  95                 "MASTECH", "MAS345", "600/7n2/rts=0/dtr=1", 600,
  96                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
  97                 sr_metex14_packet_valid, sr_metex14_parse,
  98                 NULL,
  99                 &mastech_mas345_driver_info, receive_data_MASTECH_MAS345,
 100         },
 101         {
 102                 "V&A", "VA18B", "2400/8n1", 2400,
 103                 FS9721_PACKET_SIZE, NULL,
 104                 sr_fs9721_packet_valid, sr_fs9721_parse,
 105                 dmm_details_va18b,
 106                 &va_va18b_driver_info, receive_data_VA_VA18B,
 107         },
 108         {
 109                 "Metex", "M-3640D", "1200/7n2/rts=0/dtr=1", 1200,
 110                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 111                 sr_metex14_packet_valid, sr_metex14_parse,
 112                 NULL,
 113                 &metex_m3640d_driver_info, receive_data_METEX_M3640D,
 114         },
 115         {
 116                 "PeakTech", "4370", "1200/7n2/rts=0/dtr=1", 1200,
 117                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 118                 sr_metex14_packet_valid, sr_metex14_parse,
 119                 NULL,
 120                 &peaktech_4370_driver_info, receive_data_PEAKTECH_4370,
 121         },
 122         {
 123                 "PCE", "PCE-DM32", "2400/8n1", 2400,
 124                 FS9721_PACKET_SIZE, NULL,
 125                 sr_fs9721_packet_valid, sr_fs9721_parse,
 126                 dmm_details_pce_dm32,
 127                 &pce_pce_dm32_driver_info, receive_data_PCE_PCE_DM32,
 128         },
 129         {
 130                 "RadioShack", "22-168", "1200/7n2/rts=0/dtr=1", 1200,
 131                 METEX14_PACKET_SIZE, sr_metex14_packet_request,
 132                 sr_metex14_packet_valid, sr_metex14_parse,
 133                 NULL,
 134                 &radioshack_22_168_driver_info, receive_data_RADIOSHACK_22_168,
 135         },
 136         {
 137                 "RadioShack", "22-812", "4800/8n1/rts=0/dtr=1", 4800,
 138                 RS9LCD_PACKET_SIZE, NULL,
 139                 sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
 140                 NULL,
 141                 &radioshack_22_812_driver_info, receive_data_RADIOSHACK_22_812,
 142         },
 143 };
 144
 145 /* Properly close and free all devices. */
 146 static int clear_instances(void)
 147 {
 148         struct sr_dev_inst *sdi;
 149         struct drv_context *drvc;
 150         struct dev_context *devc;
 151         GSList *l;
 152
 153         /* di is not necessarily initialized */
 154         if (!di)
 155                 return SR_OK;
 156
 157         if (!(drvc = di->priv))
 158                 return SR_OK;
 159
 160         drvc = di->priv;
 161         for (l = drvc->instances; l; l = l->next) {
 162                 if (!(sdi = l->data))
 163                         continue;
 164                 if (!(devc = sdi->priv))
 165                         continue;
 166                 sr_serial_dev_inst_free(devc->serial);
 167                 sr_dev_inst_free(sdi);
 168         }
 169         g_slist_free(drvc->instances);
 170         drvc->instances = NULL;
 171
 172         return SR_OK;
 173 }
 174
 175 static int hw_init(struct sr_context *sr_ctx, int dmm)
 176 {
 177         struct drv_context *drvc;
 178
 179         if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
 180                 sr_err("Driver context malloc failed.");
 181                 return SR_ERR_MALLOC;
 182         }
 183
 184         di = dmms[dmm].di;
 185         sr_dbg("Selected '%s' subdriver.", dmms[dmm].di->name);
 186
 187         drvc->sr_ctx = sr_ctx;
 188         //// di->priv = drvc;
 189         dmms[dmm].di->priv = drvc;
 190
 191         return SR_OK;
 192 }
 193
 194 /* Driver-specific hw_init() function wrappers */
 195 #define HW_INIT(X) static int hw_init_##X(struct sr_context *sr_ctx) \
 196                                 { return hw_init(sr_ctx, X); }
 197 HW_INIT(DIGITEK_DT4000ZC)
 198 HW_INIT(TEKPOWER_TP4000ZC)
 199 HW_INIT(METEX_ME31)
 200 HW_INIT(PEAKTECH_3410)
 201 HW_INIT(MASTECH_MAS345)
 202 HW_INIT(VA_VA18B)
 203 HW_INIT(METEX_M3640D)
 204 HW_INIT(PEAKTECH_4370)
 205 HW_INIT(PCE_PCE_DM32)
 206 HW_INIT(RADIOSHACK_22_168)
 207 HW_INIT(RADIOSHACK_22_812)
 208
 209 static GSList *scan(const char *conn, const char *serialcomm, int dmm)
 210 {
 211         struct sr_dev_inst *sdi;
 212         struct drv_context *drvc;
 213         struct dev_context *devc;
 214         struct sr_probe *probe;
 215         struct sr_serial_dev_inst *serial;
 216         GSList *devices;
 217         int dropped, ret;
 218         size_t len;
 219         uint8_t buf[128];
 220
 221         if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
 222                 return NULL;
 223
 224         if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 225                 return NULL;
 226
 227         sr_info("Probing port %s.", conn);
 228
 229         //// drvc = di->priv;
 230         drvc = dmms[dmm].di->priv;
 231         devices = NULL;
 232         serial_flush(serial);
 233
 234         /*
 235          * There's no way to get an ID from the multimeter. It just sends data
 236          * periodically, so the best we can do is check if the packets match
 237          * the expected format.
 238          */
 239
 240         /* Let's get a bit of data and see if we can find a packet. */
 241         len = sizeof(buf);
 242
 243         /* Request a packet if the DMM requires this. */
 244         if (dmms[dmm].packet_request) {
 245                 if ((ret = dmms[dmm].packet_request(serial)) < 0) {
 246                         sr_err("Failed to request packet: %d.", ret);
 247                         return FALSE;
 248                 }
 249         }
 250
 251         ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
 252                                    dmms[dmm].packet_valid, 1000,
 253                                    dmms[dmm].baudrate);
 254         if (ret != SR_OK)
 255                 goto scan_cleanup;
 256
 257         /*
 258          * If we dropped more than two packets worth of data, something is
 259          * wrong. We shouldn't quit however, since the dropped bytes might be
 260          * just zeroes at the beginning of the stream. Those can occur as a
 261          * combination of the nonstandard cable that ships with this device and
 262          * the serial port or USB to serial adapter.
 263          */
 264         dropped = len - dmms[dmm].packet_size;
 265         if (dropped > 2 * dmms[dmm].packet_size)
 266                 sr_warn("Had to drop too much data.");
 267
 268         sr_info("Found device on port %s.", conn);
 269
 270         if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, dmms[dmm].vendor,
 271                                     dmms[dmm].device, "")))
 272                 goto scan_cleanup;
 273
 274         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 275                 sr_err("Device context malloc failed.");
 276                 goto scan_cleanup;
 277         }
 278
 279         devc->serial = serial;
 280
 281         sdi->priv = devc;
 282         sdi->driver = dmms[dmm].di;
 283         if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
 284                 goto scan_cleanup;
 285         sdi->probes = g_slist_append(sdi->probes, probe);
 286         drvc->instances = g_slist_append(drvc->instances, sdi);
 287         devices = g_slist_append(devices, sdi);
 288
 289 scan_cleanup:
 290         serial_close(serial);
 291
 292         return devices;
 293 }
 294
 295 static GSList *hw_scan(GSList *options, int dmm)
 296 {
 297         struct sr_hwopt *opt;
 298         GSList *l, *devices;
 299         const char *conn, *serialcomm;
 300
 301         conn = serialcomm = NULL;
 302         for (l = options; l; l = l->next) {
 303                 opt = l->data;
 304                 switch (opt->hwopt) {
 305                 case SR_HWOPT_CONN:
 306                         conn = opt->value;
 307                         break;
 308                 case SR_HWOPT_SERIALCOMM:
 309                         serialcomm = opt->value;
 310                         break;
 311                 }
 312         }
 313         if (!conn)
 314                 return NULL;
 315
 316         if (serialcomm) {
 317                 /* Use the provided comm specs. */
 318                 devices = scan(conn, serialcomm, dmm);
 319         } else {
 320                 /* Try the default. */
 321                 devices = scan(conn, dmms[dmm].conn, dmm);
 322         }
 323
 324         return devices;
 325 }
 326
 327 /* Driver-specific hw_scan() function wrappers */
 328 #define HW_SCAN(X) static GSList *hw_scan_##X(GSList *options) \
 329                                 { return hw_scan(options, X); }
 330 HW_SCAN(DIGITEK_DT4000ZC)
 331 HW_SCAN(TEKPOWER_TP4000ZC)
 332 HW_SCAN(METEX_ME31)
 333 HW_SCAN(PEAKTECH_3410)
 334 HW_SCAN(MASTECH_MAS345)
 335 HW_SCAN(VA_VA18B)
 336 HW_SCAN(METEX_M3640D)
 337 HW_SCAN(PEAKTECH_4370)
 338 HW_SCAN(PCE_PCE_DM32)
 339 HW_SCAN(RADIOSHACK_22_168)
 340 HW_SCAN(RADIOSHACK_22_812)
 341
 342 static GSList *hw_dev_list(void)
 343 {
 344         struct drv_context *drvc;
 345
 346         drvc = di->priv;
 347
 348         return drvc->instances;
 349 }
 350
 351 static int hw_dev_open(struct sr_dev_inst *sdi)
 352 {
 353         struct dev_context *devc;
 354
 355         if (!(devc = sdi->priv)) {
 356                 sr_err("sdi->priv was NULL.");
 357                 return SR_ERR_BUG;
 358         }
 359
 360         if (serial_open(devc->serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
 361                 return SR_ERR;
 362
 363         sdi->status = SR_ST_ACTIVE;
 364
 365         return SR_OK;
 366 }
 367
 368 static int hw_dev_close(struct sr_dev_inst *sdi)
 369 {
 370         struct dev_context *devc;
 371
 372         if (!(devc = sdi->priv)) {
 373                 sr_err("sdi->priv was NULL.");
 374                 return SR_ERR_BUG;
 375         }
 376
 377         if (devc->serial && devc->serial->fd != -1) {
 378                 serial_close(devc->serial);
 379                 sdi->status = SR_ST_INACTIVE;
 380         }
 381
 382         return SR_OK;
 383 }
 384
 385 static int hw_cleanup(void)
 386 {
 387         clear_instances();
 388
 389         return SR_OK;
 390 }
 391
 392 static int hw_info_get(int info_id, const void **data,
 393                        const struct sr_dev_inst *sdi)
 394 {
 395         (void)sdi;
 396
 397         switch (info_id) {
 398         case SR_DI_HWOPTS:
 399                 *data = hwopts;
 400                 break;
 401         case SR_DI_HWCAPS:
 402                 *data = hwcaps;
 403                 break;
 404         case SR_DI_NUM_PROBES:
 405                 *data = GINT_TO_POINTER(1);
 406                 break;
 407         case SR_DI_PROBE_NAMES:
 408                 *data = probe_names;
 409                 break;
 410         default:
 411                 return SR_ERR_ARG;
 412         }
 413
 414         return SR_OK;
 415 }
 416
 417 static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
 418                              const void *value)
 419 {
 420         struct dev_context *devc;
 421
 422         if (sdi->status != SR_ST_ACTIVE)
 423                 return SR_ERR;
 424
 425         if (!(devc = sdi->priv)) {
 426                 sr_err("sdi->priv was NULL.");
 427                 return SR_ERR_BUG;
 428         }
 429
 430         switch (hwcap) {
 431         case SR_HWCAP_LIMIT_SAMPLES:
 432                 devc->limit_samples = *(const uint64_t *)value;
 433                 sr_dbg("Setting sample limit to %" PRIu64 ".",
 434                        devc->limit_samples);
 435                 break;
 436         default:
 437                 sr_err("Unknown capability: %d.", hwcap);
 438                 return SR_ERR;
 439                 break;
 440         }
 441
 442         return SR_OK;
 443 }
 444
 445 static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 446                                     void *cb_data)
 447 {
 448         struct sr_datafeed_packet packet;
 449         struct sr_datafeed_header header;
 450         struct sr_datafeed_meta_analog meta;
 451         struct dev_context *devc;
 452
 453         if (!(devc = sdi->priv)) {
 454                 sr_err("sdi->priv was NULL.");
 455                 return SR_ERR_BUG;
 456         }
 457
 458         sr_dbg("Starting acquisition.");
 459
 460         devc->cb_data = cb_data;
 461
 462         /*
 463          * Reset the number of samples to take. If we've already collected our
 464          * quota, but we start a new session, and don't reset this, we'll just
 465          * quit without acquiring any new samples.
 466          */
 467         devc->num_samples = 0;
 468
 469         /* Send header packet to the session bus. */
 470         sr_dbg("Sending SR_DF_HEADER.");
 471         packet.type = SR_DF_HEADER;
 472         packet.payload = (uint8_t *)&header;
 473         header.feed_version = 1;
 474         gettimeofday(&header.starttime, NULL);
 475         sr_session_send(devc->cb_data, &packet);
 476
 477         /* Send metadata about the SR_DF_ANALOG packets to come. */
 478         sr_dbg("Sending SR_DF_META_ANALOG.");
 479         packet.type = SR_DF_META_ANALOG;
 480         packet.payload = &meta;
 481         meta.num_probes = 1;
 482         sr_session_send(devc->cb_data, &packet);
 483
 484         /* Poll every 50ms, or whenever some data comes in. */
 485         sr_source_add(devc->serial->fd, G_IO_IN, 50,
 486                       dmms[sdi->driver->subdriver].receive_data, (void *)sdi);
 487
 488         return SR_OK;
 489 }
 490
 491 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 492 {
 493         struct sr_datafeed_packet packet;
 494         struct dev_context *devc;
 495
 496         if (sdi->status != SR_ST_ACTIVE)
 497                 return SR_ERR;
 498
 499         if (!(devc = sdi->priv)) {
 500                 sr_err("sdi->priv was NULL.");
 501                 return SR_ERR_BUG;
 502         }
 503
 504         sr_dbg("Stopping acquisition.");
 505
 506         sr_source_remove(devc->serial->fd);
 507         hw_dev_close((struct sr_dev_inst *)sdi);
 508
 509         /* Send end packet to the session bus. */
 510         sr_dbg("Sending SR_DF_END.");
 511         packet.type = SR_DF_END;
 512         sr_session_send(cb_data, &packet);
 513
 514         return SR_OK;
 515 }
 516
 517 /* Driver structs */
 518 #define DRV(ID, ID_UPPER, NAME, LONGNAME) \
 519 SR_PRIV struct sr_dev_driver ID##_driver_info = { \
 520         .name = NAME, \
 521         .longname = LONGNAME, \
 522         .api_version = 1, \
 523         .init = hw_init_##ID_UPPER, \
 524         .cleanup = hw_cleanup, \
 525         .scan = hw_scan_##ID_UPPER, \
 526         .dev_list = hw_dev_list, \
 527         .dev_clear = clear_instances, \
 528         .dev_open = hw_dev_open, \
 529         .dev_close = hw_dev_close, \
 530         .info_get = hw_info_get, \
 531         .dev_config_set = hw_dev_config_set, \
 532         .dev_acquisition_start = hw_dev_acquisition_start, \
 533         .dev_acquisition_stop = hw_dev_acquisition_stop, \
 534         .priv = NULL, \
 535         .subdriver = ID_UPPER, \
 536 };
 537 DRV(digitek_dt4000zc, DIGITEK_DT4000ZC, "digitek-dt4000zc", "Digitek DT4000ZC")
 538 DRV(tekpower_tp4000zc, TEKPOWER_TP4000ZC, "tekpower-tp4000zc", "TekPower TP4000ZC")
 539 DRV(metex_me31, METEX_ME31, "metex-me31", "Metex ME-31")
 540 DRV(peaktech_3410, PEAKTECH_3410, "peaktech-3410", "PeakTech 3410")
 541 DRV(mastech_mas345, MASTECH_MAS345, "mastech-mas345", "MASTECH MAS345")
 542 DRV(va_va18b, VA_VA18B, "va-va18b", "V&A VA18B")
 543 DRV(metex_m3640d, METEX_M3640D, "metex-m3640d", "Metex M-3640D")
 544 DRV(peaktech_4370, PEAKTECH_4370, "peaktech-4370", "PeakTech 4370")
 545 DRV(pce_pce_dm32, PCE_PCE_DM32, "pce-pce-dm32", "PCE PCE-DM32")
 546 DRV(radioshack_22_168, RADIOSHACK_22_168, "radioshack-22-168", "RadioShack 22-168")
 547 DRV(radioshack_22_812, RADIOSHACK_22_812, "radioshack-22-812", "RadioShack 22-812")