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 struct dev_buffer {
  31         /** Total size of the buffer. */
  32         size_t size;
  33         /** Amount of data currently in the buffer. */
  34         size_t len;
  35         /** Offset where the data starts in the buffer. */
  36         size_t offset;
  37         /** Space for the data. */
  38         uint8_t data[];
  39 };
  40
  41 static struct dev_buffer *dev_buffer_new(size_t size)
  42 {
  43         struct dev_buffer *dbuf;
  44
  45         dbuf = g_malloc0(sizeof(struct dev_buffer) + size);
  46         dbuf->size = size;
  47         dbuf->len = 0;
  48         dbuf->offset = 0;
  49
  50         return dbuf;
  51 }
  52
  53 static void dev_buffer_destroy(struct dev_buffer *dbuf)
  54 {
  55         g_free(dbuf);
  56 }
  57
  58 static int dev_buffer_fill_serial(struct dev_buffer *dbuf,
  59                                   struct sr_dev_inst *sdi)
  60 {
  61         struct sr_serial_dev_inst *serial;
  62         int len;
  63
  64         serial = sdi->conn;
  65
  66         /* If we already have data, move it to the beginning of the buffer. */
  67         if (dbuf->len > 0 && dbuf->offset > 0)
  68                 memmove(dbuf->data, dbuf->data + dbuf->offset, dbuf->len);
  69
  70         dbuf->offset = 0;
  71
  72         len = dbuf->size - dbuf->len;
  73         len = serial_read_nonblocking(serial, dbuf->data + dbuf->len, len);
  74         if (len < 0) {
  75                 sr_err("Serial port read error: %d.", len);
  76                 return len;
  77         }
  78
  79         dbuf->len += len;
  80
  81         return SR_OK;
  82 }
  83
  84 static uint8_t *dev_buffer_packet_find(struct dev_buffer *dbuf,
  85                                 gboolean (*packet_valid)(const uint8_t *),
  86                                 size_t packet_size)
  87 {
  88         size_t offset;
  89
  90         while (dbuf->len >= packet_size) {
  91                 if (packet_valid(dbuf->data + dbuf->offset)) {
  92                         offset = dbuf->offset;
  93                         dbuf->offset += packet_size;
  94                         dbuf->len -= packet_size;
  95                         return dbuf->data + offset;
  96                 }
  97                 dbuf->offset++;
  98                 dbuf->len--;
  99         }
 100
 101         return NULL;
 102 }
 103
 104 struct dev_limit_counter {
 105         /** The current number of received samples/frames/etc. */
 106         uint64_t count;
 107         /** The limit (in number of samples/frames/etc.). */
 108         uint64_t limit;
 109 };
 110
 111 static void dev_limit_counter_start(struct dev_limit_counter *cnt)
 112 {
 113         cnt->count = 0;
 114 }
 115
 116 static void dev_limit_counter_inc(struct dev_limit_counter *cnt)
 117 {
 118         cnt->count++;
 119 }
 120
 121 static void dev_limit_counter_limit_set(struct dev_limit_counter *cnt,
 122                                         uint64_t limit)
 123 {
 124         cnt->limit = limit;
 125 }
 126
 127 static gboolean dev_limit_counter_limit_reached(struct dev_limit_counter *cnt)
 128 {
 129         if (cnt->limit && cnt->count >= cnt->limit) {
 130                 sr_info("Requested counter limit reached.");
 131                 return TRUE;
 132         }
 133
 134         return FALSE;
 135 }
 136
 137 struct dev_time_counter {
 138         /** The starting time of current sampling run. */
 139         int64_t starttime;
 140         /** The time limit (in milliseconds). */
 141         uint64_t limit;
 142 };
 143
 144 static void dev_time_counter_start(struct dev_time_counter *cnt)
 145 {
 146         cnt->starttime = g_get_monotonic_time();
 147 }
 148
 149 static void dev_time_limit_set(struct dev_time_counter *cnt, uint64_t limit)
 150 {
 151         cnt->limit = limit;
 152 }
 153
 154 static gboolean dev_time_limit_reached(struct dev_time_counter *cnt)
 155 {
 156         int64_t time;
 157
 158         if (cnt->limit) {
 159                 time = (g_get_monotonic_time() - cnt->starttime) / 1000;
 160                 if (time > (int64_t)cnt->limit) {
 161                         sr_info("Requested time limit reached.");
 162                         return TRUE;
 163                 }
 164         }
 165
 166         return FALSE;
 167 }
 168
 169 static void serial_conf_get(GSList *options, const char *def_serialcomm,
 170                             const char **conn, const char **serialcomm)
 171 {
 172         struct sr_config *src;
 173         GSList *l;
 174
 175         *conn = *serialcomm = NULL;
 176         for (l = options; l; l = l->next) {
 177                 src = l->data;
 178                 switch (src->key) {
 179                 case SR_CONF_CONN:
 180                         *conn = g_variant_get_string(src->data, NULL);
 181                         break;
 182                 case SR_CONF_SERIALCOMM:
 183                         *serialcomm = g_variant_get_string(src->data, NULL);
 184                         break;
 185                 }
 186         }
 187
 188         if (*serialcomm == NULL)
 189                 *serialcomm = def_serialcomm;
 190 }
 191
 192 static struct sr_serial_dev_inst *serial_dev_new(GSList *options,
 193                                                  const char *def_serialcomm)
 194
 195 {
 196         const char *conn, *serialcomm;
 197
 198         serial_conf_get(options, def_serialcomm, &conn, &serialcomm);
 199
 200         if (!conn)
 201                 return NULL;
 202
 203         return sr_serial_dev_inst_new(conn, serialcomm);
 204 }
 205
 206 static int serial_stream_check_buf(struct sr_serial_dev_inst *serial,
 207                                    uint8_t *buf, size_t buflen,
 208                                    size_t packet_size,
 209                                    packet_valid_callback is_valid,
 210                                    uint64_t timeout_ms, int baudrate)
 211 {
 212         size_t len, dropped;
 213         int ret;
 214
 215         if ((ret = serial_open(serial, SERIAL_RDWR)) != SR_OK)
 216                 return ret;
 217
 218         serial_flush(serial);
 219
 220         len = buflen;
 221         ret = serial_stream_detect(serial, buf, &len, packet_size,
 222                                    is_valid, timeout_ms, baudrate);
 223
 224         serial_close(serial);
 225
 226         if (ret != SR_OK)
 227                 return ret;
 228
 229         /*
 230          * If we dropped more than two packets worth of data, something is
 231          * wrong. We shouldn't quit however, since the dropped bytes might be
 232          * just zeroes at the beginning of the stream. Those can occur as a
 233          * combination of the nonstandard cable that ships with some devices
 234          * and the serial port or USB to serial adapter.
 235          */
 236         dropped = len - packet_size;
 237         if (dropped > 2 * packet_size)
 238                 sr_warn("Had to drop too much data.");
 239
 240         return SR_OK;
 241 }
 242
 243 static int serial_stream_check(struct sr_serial_dev_inst *serial,
 244                                size_t packet_size,
 245                                packet_valid_callback is_valid,
 246                                uint64_t timeout_ms, int baudrate)
 247 {
 248         uint8_t buf[128];
 249
 250         return serial_stream_check_buf(serial, buf, sizeof(buf), packet_size,
 251                                        is_valid, timeout_ms, baudrate);
 252 }
 253
 254 static int send_config_update(struct sr_dev_inst *sdi, struct sr_config *cfg)
 255 {
 256         struct sr_datafeed_packet packet;
 257         struct sr_datafeed_meta meta;
 258         int ret;
 259
 260         memset(&meta, 0, sizeof(meta));
 261
 262         packet.type = SR_DF_META;
 263         packet.payload = &meta;
 264
 265         meta.config = g_slist_append(NULL, cfg);
 266
 267         ret = sr_session_send(sdi, &packet);
 268
 269         g_slist_free(meta.config);
 270
 271         return ret;
 272 }
 273
 274 static int send_config_update_key(struct sr_dev_inst *sdi, uint32_t key,
 275                                   GVariant *var)
 276 {
 277         struct sr_config *cfg;
 278         int ret;
 279
 280         cfg = sr_config_new(key, var);
 281         if (!cfg)
 282                 return SR_ERR;
 283
 284         ret = send_config_update(sdi, cfg);
 285         sr_config_free(cfg);
 286
 287         return ret;
 288 }
 289
 290 /*
 291  * Cyrustek ES51919 LCR chipset host protocol.
 292  *
 293  * Public official documentation does not contain the protocol
 294  * description, so this is all based on reverse engineering.
 295  *
 296  * Packet structure (17 bytes):
 297  *
 298  * 0x00: header1 ?? (0x00)
 299  * 0x01: header2 ?? (0x0d)
 300  *
 301  * 0x02: flags
 302  *         bit 0 = hold enabled
 303  *         bit 1 = reference shown (in delta mode)
 304  *         bit 2 = delta mode
 305  *         bit 3 = calibration mode
 306  *         bit 4 = sorting mode
 307  *         bit 5 = LCR mode
 308  *         bit 6 = auto mode
 309  *         bit 7 = parallel measurement (vs. serial)
 310  *
 311  * 0x03: config
 312  *         bit 0-4 = ??? (0x10)
 313  *         bit 5-7 = test frequency
 314  *                     0 = 100 Hz
 315  *                     1 = 120 Hz
 316  *                     2 = 1 kHz
 317  *                     3 = 10 kHz
 318  *                     4 = 100 kHz
 319  *                     5 = 0 Hz (DC)
 320  *
 321  * 0x04: tolerance (sorting mode)
 322  *         0 = not set
 323  *         3 = +-0.25%
 324  *         4 = +-0.5%
 325  *         5 = +-1%
 326  *         6 = +-2%
 327  *         7 = +-5%
 328  *         8 = +-10%
 329  *         9 = +-20%
 330  *        10 = -20+80%
 331  *
 332  * 0x05-0x09: primary measurement
 333  *   0x05: measured quantity
 334  *           1 = inductance
 335  *           2 = capacitance
 336  *           3 = resistance
 337  *           4 = DC resistance
 338  *   0x06: measurement MSB  (0x4e20 = 20000 = outside limits)
 339  *   0x07: measurement LSB
 340  *   0x08: measurement info
 341  *           bit 0-2 = decimal point multiplier (10^-val)
 342  *           bit 3-7 = unit
 343  *                       0 = no unit
 344  *                       1 = Ohm
 345  *                       2 = kOhm
 346  *                       3 = MOhm
 347  *                       5 = uH
 348  *                       6 = mH
 349  *                       7 = H
 350  *                       8 = kH
 351  *                       9 = pF
 352  *                       10 = nF
 353  *                       11 = uF
 354  *                       12 = mF
 355  *                       13 = %
 356  *                       14 = degree
 357  *   0x09: measurement status
 358  *           bit 0-3 = status
 359  *                       0 = normal (measurement shown)
 360  *                       1 = blank (nothing shown)
 361  *                       2 = lines ("----")
 362  *                       3 = outside limits ("OL")
 363  *                       7 = pass ("PASS")
 364  *                       8 = fail ("FAIL")
 365  *                       9 = open ("OPEn")
 366  *                      10 = shorted ("Srt")
 367  *           bit 4-6 = ??? (maybe part of same field with 0-3)
 368  *           bit 7   = ??? (some independent flag)
 369  *
 370  * 0x0a-0x0e: secondary measurement
 371  *   0x0a: measured quantity
 372  *           0 = none
 373  *           1 = dissipation factor
 374  *           2 = quality factor
 375  *           3 = parallel AC resistance / ESR
 376  *           4 = phase angle
 377  *   0x0b-0x0e: like primary measurement
 378  *
 379  * 0x0f: footer1 (0x0d) ?
 380  * 0x10: footer2 (0x0a) ?
 381  */
 382
 383 #define PACKET_SIZE 17
 384
 385 static const double frequencies[] = {
 386         100, 120, 1000, 10000, 100000, 0,
 387 };
 388
 389 enum { MODEL_NONE, MODEL_PAR, MODEL_SER, MODEL_AUTO, };
 390
 391 static const char *const models[] = {
 392         "NONE", "PARALLEL", "SERIES", "AUTO",
 393 };
 394
 395 struct dev_context {
 396         struct dev_limit_counter frame_count;
 397
 398         struct dev_time_counter time_count;
 399
 400         struct dev_buffer *buf;
 401
 402         /** The frequency of the test signal (index to frequencies[]). */
 403         unsigned int freq;
 404
 405         /** Equivalent circuit model (index to models[]). */
 406         unsigned int model;
 407 };
 408
 409 static const uint8_t *pkt_to_buf(const uint8_t *pkt, int is_secondary)
 410 {
 411         return is_secondary ? pkt + 10 : pkt + 5;
 412 }
 413
 414 static int parse_mq(const uint8_t *pkt, int is_secondary, int is_parallel)
 415 {
 416         const uint8_t *buf;
 417
 418         buf = pkt_to_buf(pkt, is_secondary);
 419
 420         switch (is_secondary << 8 | buf[0]) {
 421         case 0x001:
 422                 return is_parallel ?
 423                         SR_MQ_PARALLEL_INDUCTANCE : SR_MQ_SERIES_INDUCTANCE;
 424         case 0x002:
 425                 return is_parallel ?
 426                         SR_MQ_PARALLEL_CAPACITANCE : SR_MQ_SERIES_CAPACITANCE;
 427         case 0x003:
 428         case 0x103:
 429                 return is_parallel ?
 430                         SR_MQ_PARALLEL_RESISTANCE : SR_MQ_SERIES_RESISTANCE;
 431         case 0x004:
 432                 return SR_MQ_RESISTANCE;
 433         case 0x100:
 434                 return SR_MQ_DIFFERENCE;
 435         case 0x101:
 436                 return SR_MQ_DISSIPATION_FACTOR;
 437         case 0x102:
 438                 return SR_MQ_QUALITY_FACTOR;
 439         case 0x104:
 440                 return SR_MQ_PHASE_ANGLE;
 441         }
 442
 443         sr_err("Unknown quantity 0x%03x.", is_secondary << 8 | buf[0]);
 444
 445         return 0;
 446 }
 447
 448 static float parse_value(const uint8_t *buf, int *digits)
 449 {
 450         static const int exponents[] = {0, -1, -2, -3, -4, -5, -6, -7};
 451         int exponent;
 452         int16_t val;
 453
 454         exponent = exponents[buf[3] & 7];
 455         *digits = -exponent;
 456         val = (buf[1] << 8) | buf[2];
 457         return (float)val * powf(10, exponent);
 458 }
 459
 460 static void parse_measurement(const uint8_t *pkt, float *floatval,
 461                               struct sr_datafeed_analog *analog,
 462                               int is_secondary)
 463 {
 464         static const struct {
 465                 int unit;
 466                 int exponent;
 467         } units[] = {
 468                 { SR_UNIT_UNITLESS,   0 }, /* no unit */
 469                 { SR_UNIT_OHM,        0 }, /* Ohm */
 470                 { SR_UNIT_OHM,        3 }, /* kOhm */
 471                 { SR_UNIT_OHM,        6 }, /* MOhm */
 472                 { -1,                 0 }, /* ??? */
 473                 { SR_UNIT_HENRY,     -6 }, /* uH */
 474                 { SR_UNIT_HENRY,     -3 }, /* mH */
 475                 { SR_UNIT_HENRY,      0 }, /* H */
 476                 { SR_UNIT_HENRY,      3 }, /* kH */
 477                 { SR_UNIT_FARAD,    -12 }, /* pF */
 478                 { SR_UNIT_FARAD,     -9 }, /* nF */
 479                 { SR_UNIT_FARAD,     -6 }, /* uF */
 480                 { SR_UNIT_FARAD,     -3 }, /* mF */
 481                 { SR_UNIT_PERCENTAGE, 0 }, /* % */
 482                 { SR_UNIT_DEGREE,     0 }, /* degree */
 483         };
 484         const uint8_t *buf;
 485         int digits, exponent;
 486         int state;
 487
 488         buf = pkt_to_buf(pkt, is_secondary);
 489
 490         analog->meaning->mq = 0;
 491         analog->meaning->mqflags = 0;
 492
 493         state = buf[4] & 0xf;
 494
 495         if (state != 0 && state != 3)
 496                 return;
 497
 498         if (pkt[2] & 0x18) {
 499                 /* Calibration and Sorting modes not supported. */
 500                 return;
 501         }
 502
 503         if (!is_secondary) {
 504                 if (pkt[2] & 0x01)
 505                         analog->meaning->mqflags |= SR_MQFLAG_HOLD;
 506                 if (pkt[2] & 0x02)
 507                         analog->meaning->mqflags |= SR_MQFLAG_REFERENCE;
 508         } else {
 509                 if (pkt[2] & 0x04)
 510                         analog->meaning->mqflags |= SR_MQFLAG_RELATIVE;
 511         }
 512
 513         if ((analog->meaning->mq = parse_mq(pkt, is_secondary, pkt[2] & 0x80)) == 0)
 514                 return;
 515
 516         if ((buf[3] >> 3) >= ARRAY_SIZE(units)) {
 517                 sr_err("Unknown unit %u.", buf[3] >> 3);
 518                 analog->meaning->mq = 0;
 519                 return;
 520         }
 521
 522         analog->meaning->unit = units[buf[3] >> 3].unit;
 523
 524         exponent = units[buf[3] >> 3].exponent;
 525         *floatval = parse_value(buf, &digits);
 526         *floatval *= (state == 0) ? powf(10, exponent) : INFINITY;
 527         analog->encoding->digits = digits - exponent;
 528         analog->spec->spec_digits = digits - exponent;
 529 }
 530
 531 static unsigned int parse_freq(const uint8_t *pkt)
 532 {
 533         unsigned int freq;
 534
 535         freq = pkt[3] >> 5;
 536
 537         if (freq >= ARRAY_SIZE(frequencies)) {
 538                 sr_err("Unknown frequency %u.", freq);
 539                 freq = ARRAY_SIZE(frequencies) - 1;
 540         }
 541
 542         return freq;
 543 }
 544
 545 static unsigned int parse_model(const uint8_t *pkt)
 546 {
 547         if (pkt[2] & 0x40)
 548                 return MODEL_AUTO;
 549         else if (parse_mq(pkt, 0, 0) == SR_MQ_RESISTANCE)
 550                 return MODEL_NONE;
 551         else if (pkt[2] & 0x80)
 552                 return MODEL_PAR;
 553         else
 554                 return MODEL_SER;
 555 }
 556
 557 static gboolean packet_valid(const uint8_t *pkt)
 558 {
 559         /*
 560          * If the first two bytes of the packet are indeed a constant
 561          * header, they should be checked too. Since we don't know it
 562          * for sure, we'll just check the last two for now since they
 563          * seem to be constant just like in the other Cyrustek chipset
 564          * protocols.
 565          */
 566         if (pkt[15] == 0xd && pkt[16] == 0xa)
 567                 return TRUE;
 568
 569         return FALSE;
 570 }
 571
 572 static int do_config_update(struct sr_dev_inst *sdi, uint32_t key,
 573                             GVariant *var)
 574 {
 575         return send_config_update_key(sdi, key, var);
 576 }
 577
 578 static int send_freq_update(struct sr_dev_inst *sdi, unsigned int freq)
 579 {
 580         return do_config_update(sdi, SR_CONF_OUTPUT_FREQUENCY,
 581                                 g_variant_new_double(frequencies[freq]));
 582 }
 583
 584 static int send_model_update(struct sr_dev_inst *sdi, unsigned int model)
 585 {
 586         return do_config_update(sdi, SR_CONF_EQUIV_CIRCUIT_MODEL,
 587                                 g_variant_new_string(models[model]));
 588 }
 589
 590 static void handle_packet(struct sr_dev_inst *sdi, const uint8_t *pkt)
 591 {
 592         struct sr_datafeed_packet packet;
 593         struct sr_datafeed_analog analog;
 594         struct sr_analog_encoding encoding;
 595         struct sr_analog_meaning meaning;
 596         struct sr_analog_spec spec;
 597         struct dev_context *devc;
 598         unsigned int val;
 599         float floatval;
 600         gboolean frame;
 601         struct sr_channel *channel;
 602
 603         devc = sdi->priv;
 604
 605         val = parse_freq(pkt);
 606         if (val != devc->freq) {
 607                 if (send_freq_update(sdi, val) == SR_OK)
 608                         devc->freq = val;
 609                 else
 610                         return;
 611         }
 612
 613         val = parse_model(pkt);
 614         if (val != devc->model) {
 615                 if (send_model_update(sdi, val) == SR_OK)
 616                         devc->model = val;
 617                 else
 618                         return;
 619         }
 620
 621         frame = FALSE;
 622
 623         /* Note: digits/spec_digits will be overridden later. */
 624         sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
 625
 626         analog.num_samples = 1;
 627         analog.data = &floatval;
 628
 629         channel = sdi->channels->data;
 630         analog.meaning->channels = g_slist_append(NULL, channel);
 631
 632         parse_measurement(pkt, &floatval, &analog, 0);
 633         if (analog.meaning->mq != 0 && channel->enabled) {
 634                 if (!frame) {
 635                         packet.type = SR_DF_FRAME_BEGIN;
 636                         sr_session_send(sdi, &packet);
 637                         frame = TRUE;
 638                 }
 639
 640                 packet.type = SR_DF_ANALOG;
 641                 packet.payload = &analog;
 642
 643                 sr_session_send(sdi, &packet);
 644         }
 645
 646         g_slist_free(analog.meaning->channels);
 647
 648         channel = sdi->channels->next->data;
 649         analog.meaning->channels = g_slist_append(NULL, channel);
 650
 651         parse_measurement(pkt, &floatval, &analog, 1);
 652         if (analog.meaning->mq != 0 && channel->enabled) {
 653                 if (!frame) {
 654                         packet.type = SR_DF_FRAME_BEGIN;
 655                         sr_session_send(sdi, &packet);
 656                         frame = TRUE;
 657                 }
 658
 659                 packet.type = SR_DF_ANALOG;
 660                 packet.payload = &analog;
 661
 662                 sr_session_send(sdi, &packet);
 663         }
 664
 665         g_slist_free(analog.meaning->channels);
 666
 667         if (frame) {
 668                 packet.type = SR_DF_FRAME_END;
 669                 sr_session_send(sdi, &packet);
 670                 dev_limit_counter_inc(&devc->frame_count);
 671         }
 672 }
 673
 674 static int handle_new_data(struct sr_dev_inst *sdi)
 675 {
 676         struct dev_context *devc;
 677         uint8_t *pkt;
 678         int ret;
 679
 680         devc = sdi->priv;
 681
 682         ret = dev_buffer_fill_serial(devc->buf, sdi);
 683         if (ret < 0)
 684                 return ret;
 685
 686         while ((pkt = dev_buffer_packet_find(devc->buf, packet_valid,
 687                                              PACKET_SIZE)))
 688                 handle_packet(sdi, pkt);
 689
 690         return SR_OK;
 691 }
 692
 693 static int receive_data(int fd, int revents, void *cb_data)
 694 {
 695         struct sr_dev_inst *sdi;
 696         struct dev_context *devc;
 697
 698         (void)fd;
 699
 700         if (!(sdi = cb_data))
 701                 return TRUE;
 702
 703         if (!(devc = sdi->priv))
 704                 return TRUE;
 705
 706         if (revents == G_IO_IN) {
 707                 /* Serial data arrived. */
 708                 handle_new_data(sdi);
 709         }
 710
 711         if (dev_limit_counter_limit_reached(&devc->frame_count) ||
 712             dev_time_limit_reached(&devc->time_count))
 713                 sr_dev_acquisition_stop(sdi);
 714
 715         return TRUE;
 716 }
 717
 718 static const char *const channel_names[] = { "P1", "P2" };
 719
 720 static int setup_channels(struct sr_dev_inst *sdi)
 721 {
 722         unsigned int i;
 723
 724         for (i = 0; i < ARRAY_SIZE(channel_names); i++)
 725                 sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
 726
 727         return SR_OK;
 728 }
 729
 730 SR_PRIV void es51919_serial_clean(void *priv)
 731 {
 732         struct dev_context *devc;
 733
 734         if (!(devc = priv))
 735                 return;
 736
 737         dev_buffer_destroy(devc->buf);
 738 }
 739
 740 SR_PRIV struct sr_dev_inst *es51919_serial_scan(GSList *options,
 741                                                 const char *vendor,
 742                                                 const char *model)
 743 {
 744         struct sr_serial_dev_inst *serial;
 745         struct sr_dev_inst *sdi;
 746         struct dev_context *devc;
 747         int ret;
 748
 749         serial = NULL;
 750         sdi = NULL;
 751         devc = NULL;
 752
 753         if (!(serial = serial_dev_new(options, "9600/8n1/rts=1/dtr=1")))
 754                 goto scan_cleanup;
 755
 756         ret = serial_stream_check(serial, PACKET_SIZE, packet_valid,
 757                                   3000, 9600);
 758         if (ret != SR_OK)
 759                 goto scan_cleanup;
 760
 761         sr_info("Found device on port %s.", serial->port);
 762
 763         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 764         sdi->status = SR_ST_INACTIVE;
 765         sdi->vendor = g_strdup(vendor);
 766         sdi->model = g_strdup(model);
 767         devc = g_malloc0(sizeof(struct dev_context));
 768         devc->buf = dev_buffer_new(PACKET_SIZE * 8);
 769         sdi->inst_type = SR_INST_SERIAL;
 770         sdi->conn = serial;
 771         sdi->priv = devc;
 772
 773         if (setup_channels(sdi) != SR_OK)
 774                 goto scan_cleanup;
 775
 776         return sdi;
 777
 778 scan_cleanup:
 779         es51919_serial_clean(devc);
 780         sr_dev_inst_free(sdi);
 781         sr_serial_dev_inst_free(serial);
 782
 783         return NULL;
 784 }
 785
 786 SR_PRIV int es51919_serial_config_get(uint32_t key, GVariant **data,
 787                                       const struct sr_dev_inst *sdi,
 788                                       const struct sr_channel_group *cg)
 789 {
 790         struct dev_context *devc;
 791
 792         (void)cg;
 793
 794         devc = sdi->priv;
 795
 796         switch (key) {
 797         case SR_CONF_OUTPUT_FREQUENCY:
 798                 *data = g_variant_new_double(frequencies[devc->freq]);
 799                 break;
 800         case SR_CONF_EQUIV_CIRCUIT_MODEL:
 801                 *data = g_variant_new_string(models[devc->model]);
 802                 break;
 803         default:
 804                 return SR_ERR_NA;
 805         }
 806
 807         return SR_OK;
 808 }
 809
 810 SR_PRIV int es51919_serial_config_set(uint32_t key, GVariant *data,
 811                                       const struct sr_dev_inst *sdi,
 812                                       const struct sr_channel_group *cg)
 813 {
 814         struct dev_context *devc;
 815         uint64_t val;
 816
 817         (void)cg;
 818
 819         if (!(devc = sdi->priv))
 820                 return SR_ERR_BUG;
 821
 822         switch (key) {
 823         case SR_CONF_LIMIT_MSEC:
 824                 val = g_variant_get_uint64(data);
 825                 dev_time_limit_set(&devc->time_count, val);
 826                 sr_dbg("Setting time limit to %" PRIu64 ".", val);
 827                 break;
 828         case SR_CONF_LIMIT_FRAMES:
 829                 val = g_variant_get_uint64(data);
 830                 dev_limit_counter_limit_set(&devc->frame_count, val);
 831                 sr_dbg("Setting frame limit to %" PRIu64 ".", val);
 832                 break;
 833         default:
 834                 sr_spew("%s: Unsupported key %u", __func__, key);
 835                 return SR_ERR_NA;
 836         }
 837
 838         return SR_OK;
 839 }
 840
 841 static const uint32_t scanopts[] = {
 842         SR_CONF_CONN,
 843         SR_CONF_SERIALCOMM,
 844 };
 845
 846 static const uint32_t drvopts[] = {
 847         SR_CONF_LCRMETER,
 848 };
 849
 850 static const uint32_t devopts[] = {
 851         SR_CONF_CONTINUOUS,
 852         SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
 853         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
 854         SR_CONF_OUTPUT_FREQUENCY | SR_CONF_GET | SR_CONF_LIST,
 855         SR_CONF_EQUIV_CIRCUIT_MODEL | SR_CONF_GET | SR_CONF_LIST,
 856 };
 857
 858 SR_PRIV int es51919_serial_config_list(uint32_t key, GVariant **data,
 859                                        const struct sr_dev_inst *sdi,
 860                                        const struct sr_channel_group *cg)
 861 {
 862         switch (key) {
 863         case SR_CONF_SCAN_OPTIONS:
 864         case SR_CONF_DEVICE_OPTIONS:
 865                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 866         case SR_CONF_OUTPUT_FREQUENCY:
 867                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_DOUBLE,
 868                         ARRAY_AND_SIZE(frequencies), sizeof(double));
 869                 break;
 870         case SR_CONF_EQUIV_CIRCUIT_MODEL:
 871                 *data = g_variant_new_strv(ARRAY_AND_SIZE(models));
 872                 break;
 873         default:
 874                 return SR_ERR_NA;
 875         }
 876
 877         return SR_OK;
 878 }
 879
 880 SR_PRIV int es51919_serial_acquisition_start(const struct sr_dev_inst *sdi)
 881 {
 882         struct dev_context *devc;
 883         struct sr_serial_dev_inst *serial;
 884
 885         if (!(devc = sdi->priv))
 886                 return SR_ERR_BUG;
 887
 888         dev_limit_counter_start(&devc->frame_count);
 889         dev_time_counter_start(&devc->time_count);
 890
 891         std_session_send_df_header(sdi);
 892
 893         serial = sdi->conn;
 894         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 895                           receive_data, (void *)sdi);
 896
 897         return SR_OK;
 898 }