src/hardware/openbench-logic-sniffer/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 Bert Vermeulen <bert@biot.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 "protocol.h"
  22
  23 #define SERIALCOMM "115200/8n1"
  24
  25 static const uint32_t scanopts[] = {
  26         SR_CONF_CONN,
  27         SR_CONF_SERIALCOMM,
  28 };
  29
  30 static const uint32_t drvopts[] = {
  31         SR_CONF_LOGIC_ANALYZER,
  32 };
  33
  34 static const uint32_t devopts[] = {
  35         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  36         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  37         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  38         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  39         SR_CONF_EXTERNAL_CLOCK | SR_CONF_GET | SR_CONF_SET,
  40         SR_CONF_CLOCK_EDGE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  41         SR_CONF_PATTERN_MODE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  42         SR_CONF_SWAP | SR_CONF_SET,
  43         SR_CONF_RLE | SR_CONF_GET | SR_CONF_SET,
  44 };
  45
  46 static const int32_t trigger_matches[] = {
  47         SR_TRIGGER_ZERO,
  48         SR_TRIGGER_ONE,
  49 };
  50
  51 static const char* external_clock_edges[] = {
  52         "rising", // positive edge
  53         "falling" // negative edge
  54 };
  55
  56 #define STR_PATTERN_NONE     "None"
  57 #define STR_PATTERN_EXTERNAL "External"
  58 #define STR_PATTERN_INTERNAL "Internal"
  59
  60 /* Supported methods of test pattern outputs */
  61 enum {
  62         /**
  63          * Capture pins 31:16 (unbuffered wing) output a test pattern
  64          * that can captured on pins 0:15.
  65          */
  66         PATTERN_EXTERNAL,
  67
  68         /** Route test pattern internally to capture buffer. */
  69         PATTERN_INTERNAL,
  70 };
  71
  72 static const char *patterns[] = {
  73         STR_PATTERN_NONE,
  74         STR_PATTERN_EXTERNAL,
  75         STR_PATTERN_INTERNAL,
  76 };
  77
  78 /* Channels are numbered 0-31 (on the PCB silkscreen). */
  79 SR_PRIV const char *ols_channel_names[] = {
  80         "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
  81         "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
  82         "24", "25", "26", "27", "28", "29", "30", "31",
  83 };
  84
  85 /* Default supported samplerates, can be overridden by device metadata. */
  86 static const uint64_t samplerates[] = {
  87         SR_HZ(10),
  88         SR_MHZ(200),
  89         SR_HZ(1),
  90 };
  91
  92 #define RESPONSE_DELAY_US (20 * 1000)
  93
  94 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  95 {
  96         struct sr_config *src;
  97         struct sr_dev_inst *sdi;
  98         struct sr_serial_dev_inst *serial;
  99         GSList *l;
 100         int num_read;
 101         unsigned int i;
 102         const char *conn, *serialcomm;
 103         char buf[4] = { 0, 0, 0, 0 };
 104
 105         conn = serialcomm = NULL;
 106         for (l = options; l; l = l->next) {
 107                 src = l->data;
 108                 switch (src->key) {
 109                 case SR_CONF_CONN:
 110                         conn = g_variant_get_string(src->data, NULL);
 111                         break;
 112                 case SR_CONF_SERIALCOMM:
 113                         serialcomm = g_variant_get_string(src->data, NULL);
 114                         break;
 115                 }
 116         }
 117         if (!conn)
 118                 return NULL;
 119
 120         if (!serialcomm)
 121                 serialcomm = SERIALCOMM;
 122
 123         serial = sr_serial_dev_inst_new(conn, serialcomm);
 124
 125         /* The discovery procedure is like this: first send the Reset
 126          * command (0x00) 5 times, since the device could be anywhere
 127          * in a 5-byte command. Then send the ID command (0x02).
 128          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 129          * have a match.
 130          */
 131         sr_info("Probing %s.", conn);
 132         if (serial_open(serial, SERIAL_RDWR) != SR_OK)
 133                 return NULL;
 134
 135         if (ols_send_reset(serial) != SR_OK) {
 136                 serial_close(serial);
 137                 sr_err("Could not use port %s. Quitting.", conn);
 138                 return NULL;
 139         }
 140         send_shortcommand(serial, CMD_ID);
 141
 142         g_usleep(RESPONSE_DELAY_US);
 143
 144         if (serial_has_receive_data(serial) == 0) {
 145                 sr_dbg("Didn't get any ID reply.");
 146                 return NULL;
 147         }
 148
 149         num_read = serial_read_blocking(serial, buf, 4, serial_timeout(serial, 4));
 150         if (num_read < 0) {
 151                 sr_err("Getting ID reply failed (%d).", num_read);
 152                 return NULL;
 153         }
 154
 155         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4)) {
 156                 GString *id = sr_hexdump_new((uint8_t *)buf, num_read);
 157
 158                 sr_err("Invalid ID reply (got %s).", id->str);
 159
 160                 sr_hexdump_free(id);
 161                 return NULL;
 162         }
 163
 164         /* Definitely using the OLS protocol, check if it supports
 165          * the metadata command.
 166          */
 167         send_shortcommand(serial, CMD_METADATA);
 168
 169         g_usleep(RESPONSE_DELAY_US);
 170
 171         if (serial_has_receive_data(serial) != 0) {
 172                 /* Got metadata. */
 173                 sdi = get_metadata(serial);
 174         } else {
 175                 /* Not an OLS -- some other board that uses the sump protocol. */
 176                 sr_info("Device does not support metadata.");
 177                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 178                 sdi->status = SR_ST_INACTIVE;
 179                 sdi->vendor = g_strdup("Sump");
 180                 sdi->model = g_strdup("Logic Analyzer");
 181                 sdi->version = g_strdup("v1.0");
 182                 for (i = 0; i < ARRAY_SIZE(ols_channel_names); i++)
 183                         sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
 184                                         ols_channel_names[i]);
 185                 sdi->priv = ols_dev_new();
 186         }
 187         /* Configure samplerate and divider. */
 188         if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 189                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 190                                 DEFAULT_SAMPLERATE);
 191         sdi->inst_type = SR_INST_SERIAL;
 192         sdi->conn = serial;
 193
 194         serial_close(serial);
 195
 196         return std_scan_complete(di, g_slist_append(NULL, sdi));
 197 }
 198
 199 static int config_get(uint32_t key, GVariant **data,
 200         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 201 {
 202         struct dev_context *devc;
 203
 204         (void)cg;
 205
 206         if (!sdi)
 207                 return SR_ERR_ARG;
 208
 209         devc = sdi->priv;
 210
 211         switch (key) {
 212         case SR_CONF_SAMPLERATE:
 213                 *data = g_variant_new_uint64(devc->cur_samplerate);
 214                 break;
 215         case SR_CONF_CAPTURE_RATIO:
 216                 *data = g_variant_new_uint64(devc->capture_ratio);
 217                 break;
 218         case SR_CONF_LIMIT_SAMPLES:
 219                 *data = g_variant_new_uint64(devc->limit_samples);
 220                 break;
 221         case SR_CONF_PATTERN_MODE:
 222                 if (devc->capture_flags & CAPTURE_FLAG_EXTERNAL_TEST_MODE)
 223                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 224                 else if (devc->capture_flags & CAPTURE_FLAG_INTERNAL_TEST_MODE)
 225                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 226                 else
 227                         *data = g_variant_new_string(STR_PATTERN_NONE);
 228                 break;
 229         case SR_CONF_RLE:
 230                 *data = g_variant_new_boolean(devc->capture_flags & CAPTURE_FLAG_RLE ? TRUE : FALSE);
 231                 break;
 232         case SR_CONF_EXTERNAL_CLOCK:
 233                 *data = g_variant_new_boolean(
 234                         devc->capture_flags & CAPTURE_FLAG_CLOCK_EXTERNAL ? TRUE : FALSE);
 235                 break;
 236         case SR_CONF_CLOCK_EDGE:
 237                 *data = g_variant_new_string(external_clock_edges[
 238                         devc->capture_flags & CAPTURE_FLAG_INVERT_EXT_CLOCK ? 1 : 0]);
 239                 break;
 240         default:
 241                 return SR_ERR_NA;
 242         }
 243
 244         return SR_OK;
 245 }
 246
 247 static int config_set(uint32_t key, GVariant *data,
 248         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 249 {
 250         struct dev_context *devc;
 251         uint16_t flag;
 252         uint64_t tmp_u64;
 253         const char *stropt;
 254
 255         (void)cg;
 256
 257         devc = sdi->priv;
 258
 259         switch (key) {
 260         case SR_CONF_SAMPLERATE:
 261                 tmp_u64 = g_variant_get_uint64(data);
 262                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 263                         return SR_ERR_SAMPLERATE;
 264                 return ols_set_samplerate(sdi, g_variant_get_uint64(data));
 265         case SR_CONF_LIMIT_SAMPLES:
 266                 tmp_u64 = g_variant_get_uint64(data);
 267                 if (tmp_u64 < MIN_NUM_SAMPLES)
 268                         return SR_ERR;
 269                 devc->limit_samples = tmp_u64;
 270                 break;
 271         case SR_CONF_CAPTURE_RATIO:
 272                 devc->capture_ratio = g_variant_get_uint64(data);
 273                 break;
 274         case SR_CONF_EXTERNAL_CLOCK:
 275                 if (g_variant_get_boolean(data)) {
 276                         sr_info("Enabling external clock.");
 277                         devc->capture_flags |= CAPTURE_FLAG_CLOCK_EXTERNAL;
 278                 } else {
 279                         sr_info("Disabled external clock.");
 280                         devc->capture_flags &= ~CAPTURE_FLAG_CLOCK_EXTERNAL;
 281                 }
 282                 break;
 283         case SR_CONF_CLOCK_EDGE:
 284                 stropt = g_variant_get_string(data, NULL);
 285                 if (!strcmp(stropt, external_clock_edges[1])) {
 286                         sr_info("Triggering on falling edge of external clock.");
 287                         devc->capture_flags |= CAPTURE_FLAG_INVERT_EXT_CLOCK;
 288                 } else {
 289                         sr_info("Triggering on rising edge of external clock.");
 290                         devc->capture_flags &= ~CAPTURE_FLAG_INVERT_EXT_CLOCK;
 291                 }
 292                 break;
 293         case SR_CONF_PATTERN_MODE:
 294                 stropt = g_variant_get_string(data, NULL);
 295                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 296                         sr_info("Disabling test modes.");
 297                         flag = 0x0000;
 298                 } else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 299                         sr_info("Enabling internal test mode.");
 300                         flag = CAPTURE_FLAG_INTERNAL_TEST_MODE;
 301                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 302                         sr_info("Enabling external test mode.");
 303                         flag = CAPTURE_FLAG_EXTERNAL_TEST_MODE;
 304                 } else {
 305                         return SR_ERR;
 306                 }
 307                 devc->capture_flags &= ~CAPTURE_FLAG_INTERNAL_TEST_MODE;
 308                 devc->capture_flags &= ~CAPTURE_FLAG_EXTERNAL_TEST_MODE;
 309                 devc->capture_flags |= flag;
 310                 break;
 311         case SR_CONF_SWAP:
 312                 if (g_variant_get_boolean(data)) {
 313                         sr_info("Enabling channel swapping.");
 314                         devc->capture_flags |= CAPTURE_FLAG_SWAP_CHANNELS;
 315                 } else {
 316                         sr_info("Disabling channel swapping.");
 317                         devc->capture_flags &= ~CAPTURE_FLAG_SWAP_CHANNELS;
 318                 }
 319                 break;
 320         case SR_CONF_RLE:
 321                 if (g_variant_get_boolean(data)) {
 322                         sr_info("Enabling RLE.");
 323                         devc->capture_flags |= CAPTURE_FLAG_RLE;
 324                 } else {
 325                         sr_info("Disabling RLE.");
 326                         devc->capture_flags &= ~CAPTURE_FLAG_RLE;
 327                 }
 328                 break;
 329         default:
 330                 return SR_ERR_NA;
 331         }
 332
 333         return SR_OK;
 334 }
 335
 336 static int config_list(uint32_t key, GVariant **data,
 337         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 338 {
 339         struct dev_context *devc;
 340         int num_ols_changrp, i;
 341
 342         switch (key) {
 343         case SR_CONF_SCAN_OPTIONS:
 344         case SR_CONF_DEVICE_OPTIONS:
 345                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 346         case SR_CONF_SAMPLERATE:
 347                 *data = std_gvar_samplerates_steps(ARRAY_AND_SIZE(samplerates));
 348                 break;
 349         case SR_CONF_TRIGGER_MATCH:
 350                 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
 351                 break;
 352         case SR_CONF_CLOCK_EDGE:
 353                 *data = std_gvar_array_str(ARRAY_AND_SIZE(external_clock_edges));
 354                 break;
 355         case SR_CONF_PATTERN_MODE:
 356                 *data = g_variant_new_strv(ARRAY_AND_SIZE(patterns));
 357                 break;
 358         case SR_CONF_LIMIT_SAMPLES:
 359                 if (!sdi)
 360                         return SR_ERR_ARG;
 361                 devc = sdi->priv;
 362                 if (devc->capture_flags & CAPTURE_FLAG_RLE)
 363                         return SR_ERR_NA;
 364                 if (devc->max_samples == 0)
 365                         /* Device didn't specify sample memory size in metadata. */
 366                         return SR_ERR_NA;
 367                 /*
 368                  * Channel groups are turned off if no channels in that group are
 369                  * enabled, making more room for samples for the enabled group.
 370                 */
 371                 ols_channel_mask(sdi);
 372                 num_ols_changrp = 0;
 373                 for (i = 0; i < 4; i++) {
 374                         if (devc->channel_mask & (0xff << (i * 8)))
 375                                 num_ols_changrp++;
 376                 }
 377
 378                 *data = std_gvar_tuple_u64(MIN_NUM_SAMPLES,
 379                         (num_ols_changrp) ? devc->max_samples / num_ols_changrp : MIN_NUM_SAMPLES);
 380                 break;
 381         default:
 382                 return SR_ERR_NA;
 383         }
 384
 385         return SR_OK;
 386 }
 387
 388 static int set_basic_trigger(const struct sr_dev_inst *sdi, int stage)
 389 {
 390         struct dev_context *devc;
 391         struct sr_serial_dev_inst *serial;
 392         uint8_t cmd, arg[4];
 393
 394         devc = sdi->priv;
 395         serial = sdi->conn;
 396
 397         cmd = CMD_SET_BASIC_TRIGGER_MASK0 + stage * 4;
 398         arg[0] = devc->trigger_mask[stage] & 0xff;
 399         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 400         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 401         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 402         if (send_longcommand(serial, cmd, arg) != SR_OK)
 403                 return SR_ERR;
 404
 405         cmd = CMD_SET_BASIC_TRIGGER_VALUE0 + stage * 4;
 406         arg[0] = devc->trigger_value[stage] & 0xff;
 407         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 408         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 409         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 410         if (send_longcommand(serial, cmd, arg) != SR_OK)
 411                 return SR_ERR;
 412
 413         cmd = CMD_SET_BASIC_TRIGGER_CONFIG0 + stage * 4;
 414         arg[0] = arg[1] = arg[3] = 0x00;
 415         arg[2] = stage;
 416         if (stage == devc->num_stages)
 417                 /* Last stage, fire when this one matches. */
 418                 arg[3] |= TRIGGER_START;
 419         if (send_longcommand(serial, cmd, arg) != SR_OK)
 420                 return SR_ERR;
 421
 422         return SR_OK;
 423 }
 424
 425 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 426 {
 427         struct dev_context *devc;
 428         struct sr_serial_dev_inst *serial;
 429         uint32_t samplecount, readcount, delaycount;
 430         uint8_t ols_changrp_mask, arg[4];
 431         int num_ols_changrp;
 432         int ret, i;
 433
 434         devc = sdi->priv;
 435         serial = sdi->conn;
 436
 437         ols_channel_mask(sdi);
 438
 439         num_ols_changrp = 0;
 440         ols_changrp_mask = 0;
 441         for (i = 0; i < 4; i++) {
 442                 if (devc->channel_mask & (0xff << (i * 8))) {
 443                         ols_changrp_mask |= (1 << i);
 444                         num_ols_changrp++;
 445                 }
 446         }
 447
 448         /*
 449          * Limit readcount to prevent reading past the end of the hardware
 450          * buffer. Rather read too many samples than too few.
 451          */
 452         samplecount = MIN(devc->max_samples / num_ols_changrp, devc->limit_samples);
 453         readcount = (samplecount + 3) / 4;
 454
 455         /* Basic triggers. */
 456         if (ols_convert_trigger(sdi) != SR_OK) {
 457                 sr_err("Failed to configure channels.");
 458                 return SR_ERR;
 459         }
 460         if (devc->num_stages > 0) {
 461                 /*
 462                  * According to http://mygizmos.org/ols/Logic-Sniffer-FPGA-Spec.pdf
 463                  * reset command must be send prior each arm command
 464                  */
 465                 sr_dbg("Send reset command before trigger configure");
 466                 if (ols_send_reset(serial) != SR_OK)
 467                         return SR_ERR;
 468
 469                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 470                 devc->trigger_at_smpl = (readcount - delaycount) * 4 - devc->num_stages;
 471                 for (i = 0; i <= devc->num_stages; i++) {
 472                         sr_dbg("Setting OLS stage %d trigger.", i);
 473                         if ((ret = set_basic_trigger(sdi, i)) != SR_OK)
 474                                 return ret;
 475                 }
 476         } else {
 477                 /* No triggers configured, force trigger on first stage. */
 478                 sr_dbg("Forcing trigger at stage 0.");
 479                 if ((ret = set_basic_trigger(sdi, 0)) != SR_OK)
 480                         return ret;
 481                 delaycount = readcount;
 482         }
 483
 484         /* Samplerate. */
 485         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 486                         devc->cur_samplerate, devc->cur_samplerate_divider);
 487         arg[0] = devc->cur_samplerate_divider & 0xff;
 488         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 489         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 490         arg[3] = 0x00;
 491         if (send_longcommand(serial, CMD_SET_DIVIDER, arg) != SR_OK)
 492                 return SR_ERR;
 493
 494         /* Send sample limit and pre/post-trigger capture ratio. */
 495         sr_dbg("Setting sample limit %d, trigger point at %d",
 496                         (readcount - 1) * 4, (delaycount - 1) * 4);
 497
 498         if (devc->max_samples > 256 * 1024) {
 499                 arg[0] = ((readcount - 1) & 0xff);
 500                 arg[1] = ((readcount - 1) & 0xff00) >> 8;
 501                 arg[2] = ((readcount - 1) & 0xff0000) >> 16;
 502                 arg[3] = ((readcount - 1) & 0xff000000) >> 24;
 503                 if (send_longcommand(serial, CMD_CAPTURE_READCOUNT, arg) != SR_OK)
 504                         return SR_ERR;
 505                 arg[0] = ((delaycount - 1) & 0xff);
 506                 arg[1] = ((delaycount - 1) & 0xff00) >> 8;
 507                 arg[2] = ((delaycount - 1) & 0xff0000) >> 16;
 508                 arg[3] = ((delaycount - 1) & 0xff000000) >> 24;
 509                 if (send_longcommand(serial, CMD_CAPTURE_DELAYCOUNT, arg) != SR_OK)
 510                         return SR_ERR;
 511         } else {
 512                 arg[0] = ((readcount - 1) & 0xff);
 513                 arg[1] = ((readcount - 1) & 0xff00) >> 8;
 514                 arg[2] = ((delaycount - 1) & 0xff);
 515                 arg[3] = ((delaycount - 1) & 0xff00) >> 8;
 516                 if (send_longcommand(serial, CMD_CAPTURE_SIZE, arg) != SR_OK)
 517                         return SR_ERR;
 518         }
 519
 520         /* Flag register. */
 521         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s, %s clock%s",
 522                         devc->capture_flags & CAPTURE_FLAG_INTERNAL_TEST_MODE ? "on": "off",
 523                         devc->capture_flags & CAPTURE_FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 524                         devc->capture_flags & CAPTURE_FLAG_RLE ? "on" : "off",
 525                         devc->capture_flags & CAPTURE_FLAG_NOISE_FILTER ? "on": "off",
 526                         devc->capture_flags & CAPTURE_FLAG_DEMUX ? "on" : "off",
 527                         devc->capture_flags & CAPTURE_FLAG_CLOCK_EXTERNAL ? "external" : "internal",
 528                         devc->capture_flags & CAPTURE_FLAG_CLOCK_EXTERNAL ? (devc->capture_flags & CAPTURE_FLAG_INVERT_EXT_CLOCK
 529                                 ? " on falling edge" : "on rising edge") : "");
 530
 531         /*
 532          * Enable/disable OLS channel groups in the flag register according
 533          * to the channel mask. 1 means "disable channel".
 534          */
 535         devc->capture_flags &= ~0x3c;
 536         devc->capture_flags |= ~(ols_changrp_mask << 2) & 0x3c;
 537
 538         /* RLE mode is always zero, for now. */
 539
 540         arg[0] = devc->capture_flags & 0xff;
 541         arg[1] = devc->capture_flags >> 8;
 542         arg[2] = arg[3] = 0x00;
 543         if (send_longcommand(serial, CMD_SET_FLAGS, arg) != SR_OK)
 544                 return SR_ERR;
 545
 546         /* Start acquisition on the device. */
 547         if (send_shortcommand(serial, CMD_ARM_BASIC_TRIGGER) != SR_OK)
 548                 return SR_ERR;
 549
 550         /* Reset all operational states. */
 551         devc->rle_count = devc->num_transfers = 0;
 552         devc->num_samples = devc->num_bytes = 0;
 553         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 554         memset(devc->sample, 0, 4);
 555
 556         std_session_send_df_header(sdi);
 557
 558         /* If the device stops sending for longer than it takes to send a byte,
 559          * that means it's finished. But wait at least 100 ms to be safe.
 560          */
 561         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 562                         ols_receive_data, (struct sr_dev_inst *)sdi);
 563
 564         return SR_OK;
 565 }
 566
 567 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 568 {
 569         abort_acquisition(sdi);
 570
 571         return SR_OK;
 572 }
 573
 574 static struct sr_dev_driver ols_driver_info = {
 575         .name = "ols",
 576         .longname = "Openbench Logic Sniffer & SUMP compatibles",
 577         .api_version = 1,
 578         .init = std_init,
 579         .cleanup = std_cleanup,
 580         .scan = scan,
 581         .dev_list = std_dev_list,
 582         .dev_clear = std_dev_clear,
 583         .config_get = config_get,
 584         .config_set = config_set,
 585         .config_list = config_list,
 586         .dev_open = std_serial_dev_open,
 587         .dev_close = std_serial_dev_close,
 588         .dev_acquisition_start = dev_acquisition_start,
 589         .dev_acquisition_stop = dev_acquisition_stop,
 590         .context = NULL,
 591 };
 592 SR_REGISTER_DEV_DRIVER(ols_driver_info);