src/lcr/es51919.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2014 Janne Huttunen <jahuttun@gmail.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <config.h>
  21 #include <stdint.h>
  22 #include <string.h>
  23 #include <math.h>
  24 #include <glib.h>
  25 #include <libsigrok/libsigrok.h>
  26 #include "libsigrok-internal.h"
  27
  28 #define LOG_PREFIX "es51919"
  29
  30 #ifdef HAVE_SERIAL_COMM
  31
  32 struct dev_buffer {
  33         /** Total size of the buffer. */
  34         size_t size;
  35         /** Amount of data currently in the buffer. */
  36         size_t len;
  37         /** Offset where the data starts in the buffer. */
  38         size_t offset;
  39         /** Space for the data. */
  40         uint8_t data[];
  41 };
  42
  43 static struct dev_buffer *dev_buffer_new(size_t size)
  44 {
  45         struct dev_buffer *dbuf;
  46
  47         dbuf = g_malloc0(sizeof(struct dev_buffer) + size);
  48         dbuf->size = size;
  49         dbuf->len = 0;
  50         dbuf->offset = 0;
  51
  52         return dbuf;
  53 }
  54
  55 static void dev_buffer_destroy(struct dev_buffer *dbuf)
  56 {
  57         g_free(dbuf);
  58 }
  59
  60 static int dev_buffer_fill_serial(struct dev_buffer *dbuf,
  61                                   struct sr_dev_inst *sdi)
  62 {
  63         struct sr_serial_dev_inst *serial;
  64         int len;
  65
  66         serial = sdi->conn;
  67
  68         /* If we already have data, move it to the beginning of the buffer. */
  69         if (dbuf->len > 0 && dbuf->offset > 0)
  70                 memmove(dbuf->data, dbuf->data + dbuf->offset, dbuf->len);
  71
  72         dbuf->offset = 0;
  73
  74         len = dbuf->size - dbuf->len;
  75         len = serial_read_nonblocking(serial, dbuf->data + dbuf->len, len);
  76         if (len < 0) {
  77                 sr_err("Serial port read error: %d.", len);
  78                 return len;
  79         }
  80
  81         dbuf->len += len;
  82
  83         return SR_OK;
  84 }
  85
  86 static uint8_t *dev_buffer_packet_find(struct dev_buffer *dbuf,
  87                                 gboolean (*packet_valid)(const uint8_t *),
  88                                 size_t packet_size)
  89 {
  90         size_t offset;
  91
  92         while (dbuf->len >= packet_size) {
  93                 if (packet_valid(dbuf->data + dbuf->offset)) {
  94                         offset = dbuf->offset;
  95                         dbuf->offset += packet_size;
  96                         dbuf->len -= packet_size;
  97                         return dbuf->data + offset;
  98                 }
  99                 dbuf->offset++;
 100                 dbuf->len--;
 101         }
 102
 103         return NULL;
 104 }
 105
 106 struct dev_limit_counter {
 107         /** The current number of received samples/frames/etc. */
 108         uint64_t count;
 109         /** The limit (in number of samples/frames/etc.). */
 110         uint64_t limit;
 111 };
 112
 113 static void dev_limit_counter_start(struct dev_limit_counter *cnt)
 114 {
 115         cnt->count = 0;
 116 }
 117
 118 static void dev_limit_counter_inc(struct dev_limit_counter *cnt)
 119 {
 120         cnt->count++;
 121 }
 122
 123 static void dev_limit_counter_limit_set(struct dev_limit_counter *cnt,
 124                                         uint64_t limit)
 125 {
 126         cnt->limit = limit;
 127 }
 128
 129 static gboolean dev_limit_counter_limit_reached(struct dev_limit_counter *cnt)
 130 {
 131         if (cnt->limit && cnt->count >= cnt->limit) {
 132                 sr_info("Requested counter limit reached.");
 133                 return TRUE;
 134         }
 135
 136         return FALSE;
 137 }
 138
 139 struct dev_time_counter {
 140         /** The starting time of current sampling run. */
 141         int64_t starttime;
 142         /** The time limit (in milliseconds). */
 143         uint64_t limit;
 144 };
 145
 146 static void dev_time_counter_start(struct dev_time_counter *cnt)
 147 {
 148         cnt->starttime = g_get_monotonic_time();
 149 }
 150
 151 static void dev_time_limit_set(struct dev_time_counter *cnt, uint64_t limit)
 152 {
 153         cnt->limit = limit;
 154 }
 155
 156 static gboolean dev_time_limit_reached(struct dev_time_counter *cnt)
 157 {
 158         int64_t time;
 159
 160         if (cnt->limit) {
 161                 time = (g_get_monotonic_time() - cnt->starttime) / 1000;
 162                 if (time > (int64_t)cnt->limit) {
 163                         sr_info("Requested time limit reached.");
 164                         return TRUE;
 165                 }
 166         }
 167
 168         return FALSE;
 169 }
 170
 171 static void serial_conf_get(GSList *options, const char *def_serialcomm,
 172                             const char **conn, const char **serialcomm)
 173 {
 174         struct sr_config *src;
 175         GSList *l;
 176
 177         *conn = *serialcomm = NULL;
 178         for (l = options; l; l = l->next) {
 179                 src = l->data;
 180                 switch (src->key) {
 181                 case SR_CONF_CONN:
 182                         *conn = g_variant_get_string(src->data, NULL);
 183                         break;
 184                 case SR_CONF_SERIALCOMM:
 185                         *serialcomm = g_variant_get_string(src->data, NULL);
 186                         break;
 187                 }
 188         }
 189
 190         if (*serialcomm == NULL)
 191                 *serialcomm = def_serialcomm;
 192 }
 193
 194 static struct sr_serial_dev_inst *serial_dev_new(GSList *options,
 195                                                  const char *def_serialcomm)
 196
 197 {
 198         const char *conn, *serialcomm;
 199
 200         serial_conf_get(options, def_serialcomm, &conn, &serialcomm);
 201
 202         if (!conn)
 203                 return NULL;
 204
 205         return sr_serial_dev_inst_new(conn, serialcomm);
 206 }
 207
 208 static int serial_stream_check_buf(struct sr_serial_dev_inst *serial,
 209                                    uint8_t *buf, size_t buflen,
 210                                    size_t packet_size,
 211                                    packet_valid_callback is_valid,
 212                                    uint64_t timeout_ms)
 213 {
 214         size_t len, dropped;
 215         int ret;
 216
 217         if ((ret = serial_open(serial, SERIAL_RDWR)) != SR_OK)
 218                 return ret;
 219
 220         serial_flush(serial);
 221
 222         len = buflen;
 223         ret = serial_stream_detect(serial, buf, &len, packet_size,
 224                                    is_valid, timeout_ms);
 225
 226         serial_close(serial);
 227
 228         if (ret != SR_OK)
 229                 return ret;
 230
 231         /*
 232          * If we dropped more than two packets worth of data, something is
 233          * wrong. We shouldn't quit however, since the dropped bytes might be
 234          * just zeroes at the beginning of the stream. Those can occur as a
 235          * combination of the nonstandard cable that ships with some devices
 236          * and the serial port or USB to serial adapter.
 237          */
 238         dropped = len - packet_size;
 239         if (dropped > 2 * packet_size)
 240                 sr_warn("Had to drop too much data.");
 241
 242         return SR_OK;
 243 }
 244
 245 static int serial_stream_check(struct sr_serial_dev_inst *serial,
 246                                size_t packet_size,
 247                                packet_valid_callback is_valid,
 248                                uint64_t timeout_ms)
 249 {
 250         uint8_t buf[128];
 251
 252         return serial_stream_check_buf(serial, buf, sizeof(buf), packet_size,
 253                                        is_valid, timeout_ms);
 254 }
 255
 256 /*
 257  * Cyrustek ES51919 LCR chipset host protocol.
 258  *
 259  * Public official documentation does not contain the protocol
 260  * description, so this is all based on reverse engineering.
 261  *
 262  * Packet structure (17 bytes):
 263  *
 264  * 0x00: header1 ?? (0x00)
 265  * 0x01: header2 ?? (0x0d)
 266  *
 267  * 0x02: flags
 268  *         bit 0 = hold enabled
 269  *         bit 1 = reference shown (in delta mode)
 270  *         bit 2 = delta mode
 271  *         bit 3 = calibration mode
 272  *         bit 4 = sorting mode
 273  *         bit 5 = LCR mode
 274  *         bit 6 = auto mode
 275  *         bit 7 = parallel measurement (vs. serial)
 276  *
 277  * 0x03: config
 278  *         bit 0-4 = ??? (0x10)
 279  *         bit 5-7 = test frequency
 280  *                     0 = 100 Hz
 281  *                     1 = 120 Hz
 282  *                     2 = 1 kHz
 283  *                     3 = 10 kHz
 284  *                     4 = 100 kHz
 285  *                     5 = 0 Hz (DC)
 286  *
 287  * 0x04: tolerance (sorting mode)
 288  *         0 = not set
 289  *         3 = +-0.25%
 290  *         4 = +-0.5%
 291  *         5 = +-1%
 292  *         6 = +-2%
 293  *         7 = +-5%
 294  *         8 = +-10%
 295  *         9 = +-20%
 296  *        10 = -20+80%
 297  *
 298  * 0x05-0x09: primary measurement
 299  *   0x05: measured quantity
 300  *           1 = inductance
 301  *           2 = capacitance
 302  *           3 = resistance
 303  *           4 = DC resistance
 304  *   0x06: measurement MSB  (0x4e20 = 20000 = outside limits)
 305  *   0x07: measurement LSB
 306  *   0x08: measurement info
 307  *           bit 0-2 = decimal point multiplier (10^-val)
 308  *           bit 3-7 = unit
 309  *                       0 = no unit
 310  *                       1 = Ohm
 311  *                       2 = kOhm
 312  *                       3 = MOhm
 313  *                       5 = uH
 314  *                       6 = mH
 315  *                       7 = H
 316  *                       8 = kH
 317  *                       9 = pF
 318  *                       10 = nF
 319  *                       11 = uF
 320  *                       12 = mF
 321  *                       13 = %
 322  *                       14 = degree
 323  *   0x09: measurement status
 324  *           bit 0-3 = status
 325  *                       0 = normal (measurement shown)
 326  *                       1 = blank (nothing shown)
 327  *                       2 = lines ("----")
 328  *                       3 = outside limits ("OL")
 329  *                       7 = pass ("PASS")
 330  *                       8 = fail ("FAIL")
 331  *                       9 = open ("OPEn")
 332  *                      10 = shorted ("Srt")
 333  *           bit 4-6 = ??? (maybe part of same field with 0-3)
 334  *           bit 7   = ??? (some independent flag)
 335  *
 336  * 0x0a-0x0e: secondary measurement
 337  *   0x0a: measured quantity
 338  *           0 = none
 339  *           1 = dissipation factor
 340  *           2 = quality factor
 341  *           3 = parallel AC resistance / ESR
 342  *           4 = phase angle
 343  *   0x0b-0x0e: like primary measurement
 344  *
 345  * 0x0f: footer1 (0x0d) ?
 346  * 0x10: footer2 (0x0a) ?
 347  */
 348
 349 #define PACKET_SIZE 17
 350
 351 static const double frequencies[] = {
 352         100, 120, 1000, 10000, 100000, 0,
 353 };
 354
 355 enum { MODEL_NONE, MODEL_PAR, MODEL_SER, MODEL_AUTO, };
 356
 357 static const char *const models[] = {
 358         "NONE", "PARALLEL", "SERIES", "AUTO",
 359 };
 360
 361 struct dev_context {
 362         struct dev_limit_counter frame_count;
 363
 364         struct dev_time_counter time_count;
 365
 366         struct dev_buffer *buf;
 367
 368         /** The frequency of the test signal (index to frequencies[]). */
 369         unsigned int freq;
 370
 371         /** Equivalent circuit model (index to models[]). */
 372         unsigned int model;
 373 };
 374
 375 static const uint8_t *pkt_to_buf(const uint8_t *pkt, int is_secondary)
 376 {
 377         return is_secondary ? pkt + 10 : pkt + 5;
 378 }
 379
 380 static int parse_mq(const uint8_t *pkt, int is_secondary, int is_parallel)
 381 {
 382         const uint8_t *buf;
 383
 384         buf = pkt_to_buf(pkt, is_secondary);
 385
 386         switch (is_secondary << 8 | buf[0]) {
 387         case 0x001:
 388                 return is_parallel ?
 389                         SR_MQ_PARALLEL_INDUCTANCE : SR_MQ_SERIES_INDUCTANCE;
 390         case 0x002:
 391                 return is_parallel ?
 392                         SR_MQ_PARALLEL_CAPACITANCE : SR_MQ_SERIES_CAPACITANCE;
 393         case 0x003:
 394         case 0x103:
 395                 return is_parallel ?
 396                         SR_MQ_PARALLEL_RESISTANCE : SR_MQ_SERIES_RESISTANCE;
 397         case 0x004:
 398                 return SR_MQ_RESISTANCE;
 399         case 0x100:
 400                 return SR_MQ_DIFFERENCE;
 401         case 0x101:
 402                 return SR_MQ_DISSIPATION_FACTOR;
 403         case 0x102:
 404                 return SR_MQ_QUALITY_FACTOR;
 405         case 0x104:
 406                 return SR_MQ_PHASE_ANGLE;
 407         }
 408
 409         sr_err("Unknown quantity 0x%03x.", is_secondary << 8 | buf[0]);
 410
 411         return 0;
 412 }
 413
 414 static float parse_value(const uint8_t *buf, int *digits)
 415 {
 416         static const int exponents[] = {0, -1, -2, -3, -4, -5, -6, -7};
 417         int exponent;
 418         int16_t val;
 419
 420         exponent = exponents[buf[3] & 7];
 421         *digits = -exponent;
 422         val = (buf[1] << 8) | buf[2];
 423         return (float)val * powf(10, exponent);
 424 }
 425
 426 static void parse_measurement(const uint8_t *pkt, float *floatval,
 427                               struct sr_datafeed_analog *analog,
 428                               int is_secondary)
 429 {
 430         static const struct {
 431                 int unit;
 432                 int exponent;
 433         } units[] = {
 434                 { SR_UNIT_UNITLESS,   0 }, /* no unit */
 435                 { SR_UNIT_OHM,        0 }, /* Ohm */
 436                 { SR_UNIT_OHM,        3 }, /* kOhm */
 437                 { SR_UNIT_OHM,        6 }, /* MOhm */
 438                 { -1,                 0 }, /* ??? */
 439                 { SR_UNIT_HENRY,     -6 }, /* uH */
 440                 { SR_UNIT_HENRY,     -3 }, /* mH */
 441                 { SR_UNIT_HENRY,      0 }, /* H */
 442                 { SR_UNIT_HENRY,      3 }, /* kH */
 443                 { SR_UNIT_FARAD,    -12 }, /* pF */
 444                 { SR_UNIT_FARAD,     -9 }, /* nF */
 445                 { SR_UNIT_FARAD,     -6 }, /* uF */
 446                 { SR_UNIT_FARAD,     -3 }, /* mF */
 447                 { SR_UNIT_PERCENTAGE, 0 }, /* % */
 448                 { SR_UNIT_DEGREE,     0 }, /* degree */
 449         };
 450         const uint8_t *buf;
 451         int digits, exponent;
 452         int state;
 453
 454         buf = pkt_to_buf(pkt, is_secondary);
 455
 456         analog->meaning->mq = 0;
 457         analog->meaning->mqflags = 0;
 458
 459         state = buf[4] & 0xf;
 460
 461         if (state != 0 && state != 3)
 462                 return;
 463
 464         if (pkt[2] & 0x18) {
 465                 /* Calibration and Sorting modes not supported. */
 466                 return;
 467         }
 468
 469         if (!is_secondary) {
 470                 if (pkt[2] & 0x01)
 471                         analog->meaning->mqflags |= SR_MQFLAG_HOLD;
 472                 if (pkt[2] & 0x02)
 473                         analog->meaning->mqflags |= SR_MQFLAG_REFERENCE;
 474         } else {
 475                 if (pkt[2] & 0x04)
 476                         analog->meaning->mqflags |= SR_MQFLAG_RELATIVE;
 477         }
 478
 479         if ((analog->meaning->mq = parse_mq(pkt, is_secondary, pkt[2] & 0x80)) == 0)
 480                 return;
 481
 482         if ((buf[3] >> 3) >= ARRAY_SIZE(units)) {
 483                 sr_err("Unknown unit %u.", buf[3] >> 3);
 484                 analog->meaning->mq = 0;
 485                 return;
 486         }
 487
 488         analog->meaning->unit = units[buf[3] >> 3].unit;
 489
 490         exponent = units[buf[3] >> 3].exponent;
 491         *floatval = parse_value(buf, &digits);
 492         *floatval *= (state == 0) ? powf(10, exponent) : INFINITY;
 493         analog->encoding->digits = digits - exponent;
 494         analog->spec->spec_digits = digits - exponent;
 495 }
 496
 497 static unsigned int parse_freq(const uint8_t *pkt)
 498 {
 499         unsigned int freq;
 500
 501         freq = pkt[3] >> 5;
 502
 503         if (freq >= ARRAY_SIZE(frequencies)) {
 504                 sr_err("Unknown frequency %u.", freq);
 505                 freq = ARRAY_SIZE(frequencies) - 1;
 506         }
 507
 508         return freq;
 509 }
 510
 511 static unsigned int parse_model(const uint8_t *pkt)
 512 {
 513         if (pkt[2] & 0x40)
 514                 return MODEL_AUTO;
 515         else if (parse_mq(pkt, 0, 0) == SR_MQ_RESISTANCE)
 516                 return MODEL_NONE;
 517         else if (pkt[2] & 0x80)
 518                 return MODEL_PAR;
 519         else
 520                 return MODEL_SER;
 521 }
 522
 523 static gboolean packet_valid(const uint8_t *pkt)
 524 {
 525         /*
 526          * If the first two bytes of the packet are indeed a constant
 527          * header, they should be checked too. Since we don't know it
 528          * for sure, we'll just check the last two for now since they
 529          * seem to be constant just like in the other Cyrustek chipset
 530          * protocols.
 531          */
 532         if (pkt[15] == 0xd && pkt[16] == 0xa)
 533                 return TRUE;
 534
 535         return FALSE;
 536 }
 537
 538 static int send_freq_update(struct sr_dev_inst *sdi, unsigned int freq)
 539 {
 540         return sr_session_send_meta(sdi, SR_CONF_OUTPUT_FREQUENCY,
 541                                 g_variant_new_double(frequencies[freq]));
 542 }
 543
 544 static int send_model_update(struct sr_dev_inst *sdi, unsigned int model)
 545 {
 546         return sr_session_send_meta(sdi, SR_CONF_EQUIV_CIRCUIT_MODEL,
 547                                 g_variant_new_string(models[model]));
 548 }
 549
 550 static void handle_packet(struct sr_dev_inst *sdi, const uint8_t *pkt)
 551 {
 552         struct sr_datafeed_packet packet;
 553         struct sr_datafeed_analog analog;
 554         struct sr_analog_encoding encoding;
 555         struct sr_analog_meaning meaning;
 556         struct sr_analog_spec spec;
 557         struct dev_context *devc;
 558         unsigned int val;
 559         float floatval;
 560         gboolean frame;
 561         struct sr_channel *channel;
 562
 563         devc = sdi->priv;
 564
 565         val = parse_freq(pkt);
 566         if (val != devc->freq) {
 567                 if (send_freq_update(sdi, val) == SR_OK)
 568                         devc->freq = val;
 569                 else
 570                         return;
 571         }
 572
 573         val = parse_model(pkt);
 574         if (val != devc->model) {
 575                 if (send_model_update(sdi, val) == SR_OK)
 576                         devc->model = val;
 577                 else
 578                         return;
 579         }
 580
 581         frame = FALSE;
 582
 583         /* Note: digits/spec_digits will be overridden later. */
 584         sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
 585
 586         analog.num_samples = 1;
 587         analog.data = &floatval;
 588
 589         channel = sdi->channels->data;
 590         analog.meaning->channels = g_slist_append(NULL, channel);
 591
 592         parse_measurement(pkt, &floatval, &analog, 0);
 593         if (analog.meaning->mq != 0 && channel->enabled) {
 594                 if (!frame) {
 595                         packet.type = SR_DF_FRAME_BEGIN;
 596                         sr_session_send(sdi, &packet);
 597                         frame = TRUE;
 598                 }
 599
 600                 packet.type = SR_DF_ANALOG;
 601                 packet.payload = &analog;
 602
 603                 sr_session_send(sdi, &packet);
 604         }
 605
 606         g_slist_free(analog.meaning->channels);
 607
 608         channel = sdi->channels->next->data;
 609         analog.meaning->channels = g_slist_append(NULL, channel);
 610
 611         parse_measurement(pkt, &floatval, &analog, 1);
 612         if (analog.meaning->mq != 0 && channel->enabled) {
 613                 if (!frame) {
 614                         packet.type = SR_DF_FRAME_BEGIN;
 615                         sr_session_send(sdi, &packet);
 616                         frame = TRUE;
 617                 }
 618
 619                 packet.type = SR_DF_ANALOG;
 620                 packet.payload = &analog;
 621
 622                 sr_session_send(sdi, &packet);
 623         }
 624
 625         g_slist_free(analog.meaning->channels);
 626
 627         if (frame) {
 628                 packet.type = SR_DF_FRAME_END;
 629                 sr_session_send(sdi, &packet);
 630                 dev_limit_counter_inc(&devc->frame_count);
 631         }
 632 }
 633
 634 static int handle_new_data(struct sr_dev_inst *sdi)
 635 {
 636         struct dev_context *devc;
 637         uint8_t *pkt;
 638         int ret;
 639
 640         devc = sdi->priv;
 641
 642         ret = dev_buffer_fill_serial(devc->buf, sdi);
 643         if (ret < 0)
 644                 return ret;
 645
 646         while ((pkt = dev_buffer_packet_find(devc->buf, packet_valid,
 647                                              PACKET_SIZE)))
 648                 handle_packet(sdi, pkt);
 649
 650         return SR_OK;
 651 }
 652
 653 static int receive_data(int fd, int revents, void *cb_data)
 654 {
 655         struct sr_dev_inst *sdi;
 656         struct dev_context *devc;
 657
 658         (void)fd;
 659
 660         if (!(sdi = cb_data))
 661                 return TRUE;
 662
 663         if (!(devc = sdi->priv))
 664                 return TRUE;
 665
 666         if (revents == G_IO_IN) {
 667                 /* Serial data arrived. */
 668                 handle_new_data(sdi);
 669         }
 670
 671         if (dev_limit_counter_limit_reached(&devc->frame_count) ||
 672             dev_time_limit_reached(&devc->time_count))
 673                 sr_dev_acquisition_stop(sdi);
 674
 675         return TRUE;
 676 }
 677
 678 static const char *const channel_names[] = { "P1", "P2" };
 679
 680 static int setup_channels(struct sr_dev_inst *sdi)
 681 {
 682         unsigned int i;
 683
 684         for (i = 0; i < ARRAY_SIZE(channel_names); i++)
 685                 sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
 686
 687         return SR_OK;
 688 }
 689
 690 SR_PRIV void es51919_serial_clean(void *priv)
 691 {
 692         struct dev_context *devc;
 693
 694         if (!(devc = priv))
 695                 return;
 696
 697         dev_buffer_destroy(devc->buf);
 698 }
 699
 700 SR_PRIV struct sr_dev_inst *es51919_serial_scan(GSList *options,
 701                                                 const char *vendor,
 702                                                 const char *model)
 703 {
 704         struct sr_serial_dev_inst *serial;
 705         struct sr_dev_inst *sdi;
 706         struct dev_context *devc;
 707         int ret;
 708
 709         serial = NULL;
 710         sdi = NULL;
 711         devc = NULL;
 712
 713         if (!(serial = serial_dev_new(options, "9600/8n1/rts=1/dtr=1")))
 714                 goto scan_cleanup;
 715
 716         ret = serial_stream_check(serial, PACKET_SIZE, packet_valid, 3000);
 717         if (ret != SR_OK)
 718                 goto scan_cleanup;
 719
 720         sr_info("Found device on port %s.", serial->port);
 721
 722         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 723         sdi->status = SR_ST_INACTIVE;
 724         sdi->vendor = g_strdup(vendor);
 725         sdi->model = g_strdup(model);
 726         devc = g_malloc0(sizeof(struct dev_context));
 727         devc->buf = dev_buffer_new(PACKET_SIZE * 8);
 728         sdi->inst_type = SR_INST_SERIAL;
 729         sdi->conn = serial;
 730         sdi->priv = devc;
 731
 732         if (setup_channels(sdi) != SR_OK)
 733                 goto scan_cleanup;
 734
 735         return sdi;
 736
 737 scan_cleanup:
 738         es51919_serial_clean(devc);
 739         sr_dev_inst_free(sdi);
 740         sr_serial_dev_inst_free(serial);
 741
 742         return NULL;
 743 }
 744
 745 SR_PRIV int es51919_serial_config_get(uint32_t key, GVariant **data,
 746                                       const struct sr_dev_inst *sdi,
 747                                       const struct sr_channel_group *cg)
 748 {
 749         struct dev_context *devc;
 750
 751         (void)cg;
 752
 753         devc = sdi->priv;
 754
 755         switch (key) {
 756         case SR_CONF_OUTPUT_FREQUENCY:
 757                 *data = g_variant_new_double(frequencies[devc->freq]);
 758                 break;
 759         case SR_CONF_EQUIV_CIRCUIT_MODEL:
 760                 *data = g_variant_new_string(models[devc->model]);
 761                 break;
 762         default:
 763                 return SR_ERR_NA;
 764         }
 765
 766         return SR_OK;
 767 }
 768
 769 SR_PRIV int es51919_serial_config_set(uint32_t key, GVariant *data,
 770                                       const struct sr_dev_inst *sdi,
 771                                       const struct sr_channel_group *cg)
 772 {
 773         struct dev_context *devc;
 774         uint64_t val;
 775
 776         (void)cg;
 777
 778         if (!(devc = sdi->priv))
 779                 return SR_ERR_BUG;
 780
 781         switch (key) {
 782         case SR_CONF_LIMIT_MSEC:
 783                 val = g_variant_get_uint64(data);
 784                 dev_time_limit_set(&devc->time_count, val);
 785                 sr_dbg("Setting time limit to %" PRIu64 ".", val);
 786                 break;
 787         case SR_CONF_LIMIT_FRAMES:
 788                 val = g_variant_get_uint64(data);
 789                 dev_limit_counter_limit_set(&devc->frame_count, val);
 790                 sr_dbg("Setting frame limit to %" PRIu64 ".", val);
 791                 break;
 792         default:
 793                 sr_spew("%s: Unsupported key %u", __func__, key);
 794                 return SR_ERR_NA;
 795         }
 796
 797         return SR_OK;
 798 }
 799
 800 static const uint32_t scanopts[] = {
 801         SR_CONF_CONN,
 802         SR_CONF_SERIALCOMM,
 803 };
 804
 805 static const uint32_t drvopts[] = {
 806         SR_CONF_LCRMETER,
 807 };
 808
 809 static const uint32_t devopts[] = {
 810         SR_CONF_CONTINUOUS,
 811         SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
 812         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
 813         SR_CONF_OUTPUT_FREQUENCY | SR_CONF_GET | SR_CONF_LIST,
 814         SR_CONF_EQUIV_CIRCUIT_MODEL | SR_CONF_GET | SR_CONF_LIST,
 815 };
 816
 817 SR_PRIV int es51919_serial_config_list(uint32_t key, GVariant **data,
 818                                        const struct sr_dev_inst *sdi,
 819                                        const struct sr_channel_group *cg)
 820 {
 821         switch (key) {
 822         case SR_CONF_SCAN_OPTIONS:
 823         case SR_CONF_DEVICE_OPTIONS:
 824                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 825         case SR_CONF_OUTPUT_FREQUENCY:
 826                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_DOUBLE,
 827                         ARRAY_AND_SIZE(frequencies), sizeof(double));
 828                 break;
 829         case SR_CONF_EQUIV_CIRCUIT_MODEL:
 830                 *data = g_variant_new_strv(ARRAY_AND_SIZE(models));
 831                 break;
 832         default:
 833                 return SR_ERR_NA;
 834         }
 835
 836         return SR_OK;
 837 }
 838
 839 SR_PRIV int es51919_serial_acquisition_start(const struct sr_dev_inst *sdi)
 840 {
 841         struct dev_context *devc;
 842         struct sr_serial_dev_inst *serial;
 843
 844         if (!(devc = sdi->priv))
 845                 return SR_ERR_BUG;
 846
 847         dev_limit_counter_start(&devc->frame_count);
 848         dev_time_counter_start(&devc->time_count);
 849
 850         std_session_send_df_header(sdi);
 851
 852         serial = sdi->conn;
 853         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 854                           receive_data, (void *)sdi);
 855
 856         return SR_OK;
 857 }
 858
 859 #endif