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
 259         memset(&meta, 0, sizeof(meta));
 260
 261         packet.type = SR_DF_META;
 262         packet.payload = &meta;
 263
 264         meta.config = g_slist_append(meta.config, cfg);
 265
 266         return sr_session_send(sdi, &packet);
 267 }
 268
 269 static int send_config_update_key(struct sr_dev_inst *sdi, uint32_t key,
 270                                   GVariant *var)
 271 {
 272         struct sr_config *cfg;
 273         int ret;
 274
 275         cfg = sr_config_new(key, var);
 276         if (!cfg)
 277                 return SR_ERR;
 278
 279         ret = send_config_update(sdi, cfg);
 280         sr_config_free(cfg);
 281
 282         return ret;
 283 }
 284
 285 /*
 286  * Cyrustek ES51919 LCR chipset host protocol.
 287  *
 288  * Public official documentation does not contain the protocol
 289  * description, so this is all based on reverse engineering.
 290  *
 291  * Packet structure (17 bytes):
 292  *
 293  * 0x00: header1 ?? (0x00)
 294  * 0x01: header2 ?? (0x0d)
 295  *
 296  * 0x02: flags
 297  *         bit 0 = hold enabled
 298  *         bit 1 = reference shown (in delta mode)
 299  *         bit 2 = delta mode
 300  *         bit 3 = calibration mode
 301  *         bit 4 = sorting mode
 302  *         bit 5 = LCR mode
 303  *         bit 6 = auto mode
 304  *         bit 7 = parallel measurement (vs. serial)
 305  *
 306  * 0x03: config
 307  *         bit 0-4 = ??? (0x10)
 308  *         bit 5-7 = test frequency
 309  *                     0 = 100 Hz
 310  *                     1 = 120 Hz
 311  *                     2 = 1 kHz
 312  *                     3 = 10 kHz
 313  *                     4 = 100 kHz
 314  *                     5 = 0 Hz (DC)
 315  *
 316  * 0x04: tolerance (sorting mode)
 317  *         0 = not set
 318  *         3 = +-0.25%
 319  *         4 = +-0.5%
 320  *         5 = +-1%
 321  *         6 = +-2%
 322  *         7 = +-5%
 323  *         8 = +-10%
 324  *         9 = +-20%
 325  *        10 = -20+80%
 326  *
 327  * 0x05-0x09: primary measurement
 328  *   0x05: measured quantity
 329  *           1 = inductance
 330  *           2 = capacitance
 331  *           3 = resistance
 332  *           4 = DC resistance
 333  *   0x06: measurement MSB  (0x4e20 = 20000 = outside limits)
 334  *   0x07: measurement LSB
 335  *   0x08: measurement info
 336  *           bit 0-2 = decimal point multiplier (10^-val)
 337  *           bit 3-7 = unit
 338  *                       0 = no unit
 339  *                       1 = Ohm
 340  *                       2 = kOhm
 341  *                       3 = MOhm
 342  *                       5 = uH
 343  *                       6 = mH
 344  *                       7 = H
 345  *                       8 = kH
 346  *                       9 = pF
 347  *                       10 = nF
 348  *                       11 = uF
 349  *                       12 = mF
 350  *                       13 = %
 351  *                       14 = degree
 352  *   0x09: measurement status
 353  *           bit 0-3 = status
 354  *                       0 = normal (measurement shown)
 355  *                       1 = blank (nothing shown)
 356  *                       2 = lines ("----")
 357  *                       3 = outside limits ("OL")
 358  *                       7 = pass ("PASS")
 359  *                       8 = fail ("FAIL")
 360  *                       9 = open ("OPEn")
 361  *                      10 = shorted ("Srt")
 362  *           bit 4-6 = ??? (maybe part of same field with 0-3)
 363  *           bit 7   = ??? (some independent flag)
 364  *
 365  * 0x0a-0x0e: secondary measurement
 366  *   0x0a: measured quantity
 367  *           0 = none
 368  *           1 = dissipation factor
 369  *           2 = quality factor
 370  *           3 = parallel AC resistance / ESR
 371  *           4 = phase angle
 372  *   0x0b-0x0e: like primary measurement
 373  *
 374  * 0x0f: footer1 (0x0d) ?
 375  * 0x10: footer2 (0x0a) ?
 376  */
 377
 378 #define PACKET_SIZE 17
 379
 380 static const double frequencies[] = {
 381         100, 120, 1000, 10000, 100000, 0,
 382 };
 383
 384 enum { MODEL_NONE, MODEL_PAR, MODEL_SER, MODEL_AUTO, };
 385
 386 static const char *const models[] = {
 387         "NONE", "PARALLEL", "SERIES", "AUTO",
 388 };
 389
 390 struct dev_context {
 391         struct dev_limit_counter frame_count;
 392
 393         struct dev_time_counter time_count;
 394
 395         struct dev_buffer *buf;
 396
 397         /** The frequency of the test signal (index to frequencies[]). */
 398         unsigned int freq;
 399
 400         /** Equivalent circuit model (index to models[]). */
 401         unsigned int model;
 402 };
 403
 404 static const uint8_t *pkt_to_buf(const uint8_t *pkt, int is_secondary)
 405 {
 406         return is_secondary ? pkt + 10 : pkt + 5;
 407 }
 408
 409 static int parse_mq(const uint8_t *pkt, int is_secondary, int is_parallel)
 410 {
 411         const uint8_t *buf;
 412
 413         buf = pkt_to_buf(pkt, is_secondary);
 414
 415         switch (is_secondary << 8 | buf[0]) {
 416         case 0x001:
 417                 return is_parallel ?
 418                         SR_MQ_PARALLEL_INDUCTANCE : SR_MQ_SERIES_INDUCTANCE;
 419         case 0x002:
 420                 return is_parallel ?
 421                         SR_MQ_PARALLEL_CAPACITANCE : SR_MQ_SERIES_CAPACITANCE;
 422         case 0x003:
 423         case 0x103:
 424                 return is_parallel ?
 425                         SR_MQ_PARALLEL_RESISTANCE : SR_MQ_SERIES_RESISTANCE;
 426         case 0x004:
 427                 return SR_MQ_RESISTANCE;
 428         case 0x100:
 429                 return SR_MQ_DIFFERENCE;
 430         case 0x101:
 431                 return SR_MQ_DISSIPATION_FACTOR;
 432         case 0x102:
 433                 return SR_MQ_QUALITY_FACTOR;
 434         case 0x104:
 435                 return SR_MQ_PHASE_ANGLE;
 436         }
 437
 438         sr_err("Unknown quantity 0x%03x.", is_secondary << 8 | buf[0]);
 439
 440         return 0;
 441 }
 442
 443 static float parse_value(const uint8_t *buf, int *digits)
 444 {
 445         static const int exponents[] = {0, -1, -2, -3, -4, -5, -6, -7};
 446         int exponent;
 447         int16_t val;
 448
 449         exponent = exponents[buf[3] & 7];
 450         *digits = -exponent;
 451         val = (buf[1] << 8) | buf[2];
 452         return (float)val * powf(10, exponent);
 453 }
 454
 455 static void parse_measurement(const uint8_t *pkt, float *floatval,
 456                               struct sr_datafeed_analog *analog,
 457                               int is_secondary)
 458 {
 459         static const struct {
 460                 int unit;
 461                 int exponent;
 462         } units[] = {
 463                 { SR_UNIT_UNITLESS,   0 }, /* no unit */
 464                 { SR_UNIT_OHM,        0 }, /* Ohm */
 465                 { SR_UNIT_OHM,        3 }, /* kOhm */
 466                 { SR_UNIT_OHM,        6 }, /* MOhm */
 467                 { -1,                 0 }, /* ??? */
 468                 { SR_UNIT_HENRY,     -6 }, /* uH */
 469                 { SR_UNIT_HENRY,     -3 }, /* mH */
 470                 { SR_UNIT_HENRY,      0 }, /* H */
 471                 { SR_UNIT_HENRY,      3 }, /* kH */
 472                 { SR_UNIT_FARAD,    -12 }, /* pF */
 473                 { SR_UNIT_FARAD,     -9 }, /* nF */
 474                 { SR_UNIT_FARAD,     -6 }, /* uF */
 475                 { SR_UNIT_FARAD,     -3 }, /* mF */
 476                 { SR_UNIT_PERCENTAGE, 0 }, /* % */
 477                 { SR_UNIT_DEGREE,     0 }, /* degree */
 478         };
 479         const uint8_t *buf;
 480         int digits, exponent;
 481         int state;
 482
 483         buf = pkt_to_buf(pkt, is_secondary);
 484
 485         analog->meaning->mq = 0;
 486         analog->meaning->mqflags = 0;
 487
 488         state = buf[4] & 0xf;
 489
 490         if (state != 0 && state != 3)
 491                 return;
 492
 493         if (pkt[2] & 0x18) {
 494                 /* Calibration and Sorting modes not supported. */
 495                 return;
 496         }
 497
 498         if (!is_secondary) {
 499                 if (pkt[2] & 0x01)
 500                         analog->meaning->mqflags |= SR_MQFLAG_HOLD;
 501                 if (pkt[2] & 0x02)
 502                         analog->meaning->mqflags |= SR_MQFLAG_REFERENCE;
 503         } else {
 504                 if (pkt[2] & 0x04)
 505                         analog->meaning->mqflags |= SR_MQFLAG_RELATIVE;
 506         }
 507
 508         if ((analog->meaning->mq = parse_mq(pkt, is_secondary, pkt[2] & 0x80)) == 0)
 509                 return;
 510
 511         if ((buf[3] >> 3) >= ARRAY_SIZE(units)) {
 512                 sr_err("Unknown unit %u.", buf[3] >> 3);
 513                 analog->meaning->mq = 0;
 514                 return;
 515         }
 516
 517         analog->meaning->unit = units[buf[3] >> 3].unit;
 518
 519         exponent = units[buf[3] >> 3].exponent;
 520         *floatval = parse_value(buf, &digits);
 521         *floatval *= (state == 0) ? powf(10, exponent) : INFINITY;
 522         analog->encoding->digits = digits - exponent;
 523         analog->spec->spec_digits = digits - exponent;
 524 }
 525
 526 static unsigned int parse_freq(const uint8_t *pkt)
 527 {
 528         unsigned int freq;
 529
 530         freq = pkt[3] >> 5;
 531
 532         if (freq >= ARRAY_SIZE(frequencies)) {
 533                 sr_err("Unknown frequency %u.", freq);
 534                 freq = ARRAY_SIZE(frequencies) - 1;
 535         }
 536
 537         return freq;
 538 }
 539
 540 static unsigned int parse_model(const uint8_t *pkt)
 541 {
 542         if (pkt[2] & 0x40)
 543                 return MODEL_AUTO;
 544         else if (parse_mq(pkt, 0, 0) == SR_MQ_RESISTANCE)
 545                 return MODEL_NONE;
 546         else if (pkt[2] & 0x80)
 547                 return MODEL_PAR;
 548         else
 549                 return MODEL_SER;
 550 }
 551
 552 static gboolean packet_valid(const uint8_t *pkt)
 553 {
 554         /*
 555          * If the first two bytes of the packet are indeed a constant
 556          * header, they should be checked too. Since we don't know it
 557          * for sure, we'll just check the last two for now since they
 558          * seem to be constant just like in the other Cyrustek chipset
 559          * protocols.
 560          */
 561         if (pkt[15] == 0xd && pkt[16] == 0xa)
 562                 return TRUE;
 563
 564         return FALSE;
 565 }
 566
 567 static int do_config_update(struct sr_dev_inst *sdi, uint32_t key,
 568                             GVariant *var)
 569 {
 570         return send_config_update_key(sdi, key, var);
 571 }
 572
 573 static int send_freq_update(struct sr_dev_inst *sdi, unsigned int freq)
 574 {
 575         return do_config_update(sdi, SR_CONF_OUTPUT_FREQUENCY,
 576                                 g_variant_new_double(frequencies[freq]));
 577 }
 578
 579 static int send_model_update(struct sr_dev_inst *sdi, unsigned int model)
 580 {
 581         return do_config_update(sdi, SR_CONF_EQUIV_CIRCUIT_MODEL,
 582                                 g_variant_new_string(models[model]));
 583 }
 584
 585 static void handle_packet(struct sr_dev_inst *sdi, const uint8_t *pkt)
 586 {
 587         struct sr_datafeed_packet packet;
 588         struct sr_datafeed_analog analog;
 589         struct sr_analog_encoding encoding;
 590         struct sr_analog_meaning meaning;
 591         struct sr_analog_spec spec;
 592         struct dev_context *devc;
 593         unsigned int val;
 594         float floatval;
 595         gboolean frame;
 596         struct sr_channel *channel;
 597
 598         devc = sdi->priv;
 599
 600         val = parse_freq(pkt);
 601         if (val != devc->freq) {
 602                 if (send_freq_update(sdi, val) == SR_OK)
 603                         devc->freq = val;
 604                 else
 605                         return;
 606         }
 607
 608         val = parse_model(pkt);
 609         if (val != devc->model) {
 610                 if (send_model_update(sdi, val) == SR_OK)
 611                         devc->model = val;
 612                 else
 613                         return;
 614         }
 615
 616         frame = FALSE;
 617
 618         /* Note: digits/spec_digits will be overridden later. */
 619         sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
 620
 621         analog.num_samples = 1;
 622         analog.data = &floatval;
 623
 624         channel = sdi->channels->data;
 625         analog.meaning->channels = g_slist_append(NULL, channel);
 626
 627         parse_measurement(pkt, &floatval, &analog, 0);
 628         if (analog.meaning->mq != 0 && channel->enabled) {
 629                 if (!frame) {
 630                         packet.type = SR_DF_FRAME_BEGIN;
 631                         sr_session_send(sdi, &packet);
 632                         frame = TRUE;
 633                 }
 634
 635                 packet.type = SR_DF_ANALOG;
 636                 packet.payload = &analog;
 637
 638                 sr_session_send(sdi, &packet);
 639         }
 640
 641         g_slist_free(analog.meaning->channels);
 642
 643         channel = sdi->channels->next->data;
 644         analog.meaning->channels = g_slist_append(NULL, channel);
 645
 646         parse_measurement(pkt, &floatval, &analog, 1);
 647         if (analog.meaning->mq != 0 && channel->enabled) {
 648                 if (!frame) {
 649                         packet.type = SR_DF_FRAME_BEGIN;
 650                         sr_session_send(sdi, &packet);
 651                         frame = TRUE;
 652                 }
 653
 654                 packet.type = SR_DF_ANALOG;
 655                 packet.payload = &analog;
 656
 657                 sr_session_send(sdi, &packet);
 658         }
 659
 660         g_slist_free(analog.meaning->channels);
 661
 662         if (frame) {
 663                 packet.type = SR_DF_FRAME_END;
 664                 sr_session_send(sdi, &packet);
 665                 dev_limit_counter_inc(&devc->frame_count);
 666         }
 667 }
 668
 669 static int handle_new_data(struct sr_dev_inst *sdi)
 670 {
 671         struct dev_context *devc;
 672         uint8_t *pkt;
 673         int ret;
 674
 675         devc = sdi->priv;
 676
 677         ret = dev_buffer_fill_serial(devc->buf, sdi);
 678         if (ret < 0)
 679                 return ret;
 680
 681         while ((pkt = dev_buffer_packet_find(devc->buf, packet_valid,
 682                                              PACKET_SIZE)))
 683                 handle_packet(sdi, pkt);
 684
 685         return SR_OK;
 686 }
 687
 688 static int receive_data(int fd, int revents, void *cb_data)
 689 {
 690         struct sr_dev_inst *sdi;
 691         struct dev_context *devc;
 692
 693         (void)fd;
 694
 695         if (!(sdi = cb_data))
 696                 return TRUE;
 697
 698         if (!(devc = sdi->priv))
 699                 return TRUE;
 700
 701         if (revents == G_IO_IN) {
 702                 /* Serial data arrived. */
 703                 handle_new_data(sdi);
 704         }
 705
 706         if (dev_limit_counter_limit_reached(&devc->frame_count) ||
 707             dev_time_limit_reached(&devc->time_count))
 708                 sr_dev_acquisition_stop(sdi);
 709
 710         return TRUE;
 711 }
 712
 713 static const char *const channel_names[] = { "P1", "P2" };
 714
 715 static int setup_channels(struct sr_dev_inst *sdi)
 716 {
 717         unsigned int i;
 718
 719         for (i = 0; i < ARRAY_SIZE(channel_names); i++)
 720                 sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE, channel_names[i]);
 721
 722         return SR_OK;
 723 }
 724
 725 SR_PRIV void es51919_serial_clean(void *priv)
 726 {
 727         struct dev_context *devc;
 728
 729         if (!(devc = priv))
 730                 return;
 731
 732         dev_buffer_destroy(devc->buf);
 733 }
 734
 735 SR_PRIV struct sr_dev_inst *es51919_serial_scan(GSList *options,
 736                                                 const char *vendor,
 737                                                 const char *model)
 738 {
 739         struct sr_serial_dev_inst *serial;
 740         struct sr_dev_inst *sdi;
 741         struct dev_context *devc;
 742         int ret;
 743
 744         serial = NULL;
 745         sdi = NULL;
 746         devc = NULL;
 747
 748         if (!(serial = serial_dev_new(options, "9600/8n1/rts=1/dtr=1")))
 749                 goto scan_cleanup;
 750
 751         ret = serial_stream_check(serial, PACKET_SIZE, packet_valid,
 752                                   3000, 9600);
 753         if (ret != SR_OK)
 754                 goto scan_cleanup;
 755
 756         sr_info("Found device on port %s.", serial->port);
 757
 758         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 759         sdi->status = SR_ST_INACTIVE;
 760         sdi->vendor = g_strdup(vendor);
 761         sdi->model = g_strdup(model);
 762         devc = g_malloc0(sizeof(struct dev_context));
 763         devc->buf = dev_buffer_new(PACKET_SIZE * 8);
 764         sdi->inst_type = SR_INST_SERIAL;
 765         sdi->conn = serial;
 766         sdi->priv = devc;
 767
 768         if (setup_channels(sdi) != SR_OK)
 769                 goto scan_cleanup;
 770
 771         return sdi;
 772
 773 scan_cleanup:
 774         es51919_serial_clean(devc);
 775         sr_dev_inst_free(sdi);
 776         sr_serial_dev_inst_free(serial);
 777
 778         return NULL;
 779 }
 780
 781 SR_PRIV int es51919_serial_config_get(uint32_t key, GVariant **data,
 782                                       const struct sr_dev_inst *sdi,
 783                                       const struct sr_channel_group *cg)
 784 {
 785         struct dev_context *devc;
 786
 787         (void)cg;
 788
 789         devc = sdi->priv;
 790
 791         switch (key) {
 792         case SR_CONF_OUTPUT_FREQUENCY:
 793                 *data = g_variant_new_double(frequencies[devc->freq]);
 794                 break;
 795         case SR_CONF_EQUIV_CIRCUIT_MODEL:
 796                 *data = g_variant_new_string(models[devc->model]);
 797                 break;
 798         default:
 799                 return SR_ERR_NA;
 800         }
 801
 802         return SR_OK;
 803 }
 804
 805 SR_PRIV int es51919_serial_config_set(uint32_t key, GVariant *data,
 806                                       const struct sr_dev_inst *sdi,
 807                                       const struct sr_channel_group *cg)
 808 {
 809         struct dev_context *devc;
 810         uint64_t val;
 811
 812         (void)cg;
 813
 814         if (!(devc = sdi->priv))
 815                 return SR_ERR_BUG;
 816
 817         switch (key) {
 818         case SR_CONF_LIMIT_MSEC:
 819                 val = g_variant_get_uint64(data);
 820                 dev_time_limit_set(&devc->time_count, val);
 821                 sr_dbg("Setting time limit to %" PRIu64 ".", val);
 822                 break;
 823         case SR_CONF_LIMIT_FRAMES:
 824                 val = g_variant_get_uint64(data);
 825                 dev_limit_counter_limit_set(&devc->frame_count, val);
 826                 sr_dbg("Setting frame limit to %" PRIu64 ".", val);
 827                 break;
 828         default:
 829                 sr_spew("%s: Unsupported key %u", __func__, key);
 830                 return SR_ERR_NA;
 831         }
 832
 833         return SR_OK;
 834 }
 835
 836 static const uint32_t scanopts[] = {
 837         SR_CONF_CONN,
 838         SR_CONF_SERIALCOMM,
 839 };
 840
 841 static const uint32_t drvopts[] = {
 842         SR_CONF_LCRMETER,
 843 };
 844
 845 static const uint32_t devopts[] = {
 846         SR_CONF_CONTINUOUS,
 847         SR_CONF_LIMIT_FRAMES | SR_CONF_SET,
 848         SR_CONF_LIMIT_MSEC | SR_CONF_SET,
 849         SR_CONF_OUTPUT_FREQUENCY | SR_CONF_GET | SR_CONF_LIST,
 850         SR_CONF_EQUIV_CIRCUIT_MODEL | SR_CONF_GET | SR_CONF_LIST,
 851 };
 852
 853 SR_PRIV int es51919_serial_config_list(uint32_t key, GVariant **data,
 854                                        const struct sr_dev_inst *sdi,
 855                                        const struct sr_channel_group *cg)
 856 {
 857         switch (key) {
 858         case SR_CONF_SCAN_OPTIONS:
 859         case SR_CONF_DEVICE_OPTIONS:
 860                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 861         case SR_CONF_OUTPUT_FREQUENCY:
 862                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_DOUBLE,
 863                         ARRAY_AND_SIZE(frequencies), sizeof(double));
 864                 break;
 865         case SR_CONF_EQUIV_CIRCUIT_MODEL:
 866                 *data = g_variant_new_strv(ARRAY_AND_SIZE(models));
 867                 break;
 868         default:
 869                 return SR_ERR_NA;
 870         }
 871
 872         return SR_OK;
 873 }
 874
 875 SR_PRIV int es51919_serial_acquisition_start(const struct sr_dev_inst *sdi)
 876 {
 877         struct dev_context *devc;
 878         struct sr_serial_dev_inst *serial;
 879
 880         if (!(devc = sdi->priv))
 881                 return SR_ERR_BUG;
 882
 883         dev_limit_counter_start(&devc->frame_count);
 884         dev_time_counter_start(&devc->time_count);
 885
 886         std_session_send_df_header(sdi);
 887
 888         serial = sdi->conn;
 889         serial_source_add(sdi->session, serial, G_IO_IN, 50,
 890                           receive_data, (void *)sdi);
 891
 892         return SR_OK;
 893 }