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_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_CLOCK_EDGE:
 233                 *data = g_variant_new_string(external_clock_edges[
 234                         devc->capture_flags & CAPTURE_FLAG_INVERT_EXT_CLOCK ? 1 : 0]);
 235                 break;
 236         default:
 237                 return SR_ERR_NA;
 238         }
 239
 240         return SR_OK;
 241 }
 242
 243 static int config_set(uint32_t key, GVariant *data,
 244         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 245 {
 246         struct dev_context *devc;
 247         uint16_t flag;
 248         uint64_t tmp_u64;
 249         const char *stropt;
 250
 251         (void)cg;
 252
 253         devc = sdi->priv;
 254
 255         switch (key) {
 256         case SR_CONF_SAMPLERATE:
 257                 tmp_u64 = g_variant_get_uint64(data);
 258                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 259                         return SR_ERR_SAMPLERATE;
 260                 return ols_set_samplerate(sdi, g_variant_get_uint64(data));
 261         case SR_CONF_LIMIT_SAMPLES:
 262                 tmp_u64 = g_variant_get_uint64(data);
 263                 if (tmp_u64 < MIN_NUM_SAMPLES)
 264                         return SR_ERR;
 265                 devc->limit_samples = tmp_u64;
 266                 break;
 267         case SR_CONF_CAPTURE_RATIO:
 268                 devc->capture_ratio = g_variant_get_uint64(data);
 269                 break;
 270         case SR_CONF_EXTERNAL_CLOCK:
 271                 if (g_variant_get_boolean(data)) {
 272                         sr_info("Enabling external clock.");
 273                         devc->capture_flags |= CAPTURE_FLAG_CLOCK_EXTERNAL;
 274                 } else {
 275                         sr_info("Disabled external clock.");
 276                         devc->capture_flags &= ~CAPTURE_FLAG_CLOCK_EXTERNAL;
 277                 }
 278                 break;
 279         case SR_CONF_CLOCK_EDGE:
 280                 stropt = g_variant_get_string(data, NULL);
 281                 if (!strcmp(stropt, external_clock_edges[1])) {
 282                         sr_info("Triggering on falling edge of external clock.");
 283                         devc->capture_flags |= CAPTURE_FLAG_INVERT_EXT_CLOCK;
 284                 } else {
 285                         sr_info("Triggering on rising edge of external clock.");
 286                         devc->capture_flags &= ~CAPTURE_FLAG_INVERT_EXT_CLOCK;
 287                 }
 288                 break;
 289         case SR_CONF_PATTERN_MODE:
 290                 stropt = g_variant_get_string(data, NULL);
 291                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 292                         sr_info("Disabling test modes.");
 293                         flag = 0x0000;
 294                 } else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 295                         sr_info("Enabling internal test mode.");
 296                         flag = CAPTURE_FLAG_INTERNAL_TEST_MODE;
 297                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 298                         sr_info("Enabling external test mode.");
 299                         flag = CAPTURE_FLAG_EXTERNAL_TEST_MODE;
 300                 } else {
 301                         return SR_ERR;
 302                 }
 303                 devc->capture_flags &= ~CAPTURE_FLAG_INTERNAL_TEST_MODE;
 304                 devc->capture_flags &= ~CAPTURE_FLAG_EXTERNAL_TEST_MODE;
 305                 devc->capture_flags |= flag;
 306                 break;
 307         case SR_CONF_SWAP:
 308                 if (g_variant_get_boolean(data)) {
 309                         sr_info("Enabling channel swapping.");
 310                         devc->capture_flags |= CAPTURE_FLAG_SWAP_CHANNELS;
 311                 } else {
 312                         sr_info("Disabling channel swapping.");
 313                         devc->capture_flags &= ~CAPTURE_FLAG_SWAP_CHANNELS;
 314                 }
 315                 break;
 316         case SR_CONF_RLE:
 317                 if (g_variant_get_boolean(data)) {
 318                         sr_info("Enabling RLE.");
 319                         devc->capture_flags |= CAPTURE_FLAG_RLE;
 320                 } else {
 321                         sr_info("Disabling RLE.");
 322                         devc->capture_flags &= ~CAPTURE_FLAG_RLE;
 323                 }
 324                 break;
 325         default:
 326                 return SR_ERR_NA;
 327         }
 328
 329         return SR_OK;
 330 }
 331
 332 static int config_list(uint32_t key, GVariant **data,
 333         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 334 {
 335         struct dev_context *devc;
 336         int num_ols_changrp, i;
 337
 338         switch (key) {
 339         case SR_CONF_SCAN_OPTIONS:
 340         case SR_CONF_DEVICE_OPTIONS:
 341                 return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
 342         case SR_CONF_SAMPLERATE:
 343                 *data = std_gvar_samplerates_steps(ARRAY_AND_SIZE(samplerates));
 344                 break;
 345         case SR_CONF_TRIGGER_MATCH:
 346                 *data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
 347                 break;
 348         case SR_CONF_CLOCK_EDGE:
 349                 *data = std_gvar_array_str(ARRAY_AND_SIZE(external_clock_edges));
 350                 break;
 351         case SR_CONF_PATTERN_MODE:
 352                 *data = g_variant_new_strv(ARRAY_AND_SIZE(patterns));
 353                 break;
 354         case SR_CONF_LIMIT_SAMPLES:
 355                 if (!sdi)
 356                         return SR_ERR_ARG;
 357                 devc = sdi->priv;
 358                 if (devc->capture_flags & CAPTURE_FLAG_RLE)
 359                         return SR_ERR_NA;
 360                 if (devc->max_samples == 0)
 361                         /* Device didn't specify sample memory size in metadata. */
 362                         return SR_ERR_NA;
 363                 /*
 364                  * Channel groups are turned off if no channels in that group are
 365                  * enabled, making more room for samples for the enabled group.
 366                 */
 367                 ols_channel_mask(sdi);
 368                 num_ols_changrp = 0;
 369                 for (i = 0; i < 4; i++) {
 370                         if (devc->channel_mask & (0xff << (i * 8)))
 371                                 num_ols_changrp++;
 372                 }
 373
 374                 *data = std_gvar_tuple_u64(MIN_NUM_SAMPLES,
 375                         (num_ols_changrp) ? devc->max_samples / num_ols_changrp : MIN_NUM_SAMPLES);
 376                 break;
 377         default:
 378                 return SR_ERR_NA;
 379         }
 380
 381         return SR_OK;
 382 }
 383
 384 static int set_basic_trigger(const struct sr_dev_inst *sdi, int stage)
 385 {
 386         struct dev_context *devc;
 387         struct sr_serial_dev_inst *serial;
 388         uint8_t cmd, arg[4];
 389
 390         devc = sdi->priv;
 391         serial = sdi->conn;
 392
 393         cmd = CMD_SET_BASIC_TRIGGER_MASK0 + stage * 4;
 394         arg[0] = devc->trigger_mask[stage] & 0xff;
 395         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 396         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 397         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 398         if (send_longcommand(serial, cmd, arg) != SR_OK)
 399                 return SR_ERR;
 400
 401         cmd = CMD_SET_BASIC_TRIGGER_VALUE0 + stage * 4;
 402         arg[0] = devc->trigger_value[stage] & 0xff;
 403         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 404         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 405         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 406         if (send_longcommand(serial, cmd, arg) != SR_OK)
 407                 return SR_ERR;
 408
 409         cmd = CMD_SET_BASIC_TRIGGER_CONFIG0 + stage * 4;
 410         arg[0] = arg[1] = arg[3] = 0x00;
 411         arg[2] = stage;
 412         if (stage == devc->num_stages)
 413                 /* Last stage, fire when this one matches. */
 414                 arg[3] |= TRIGGER_START;
 415         if (send_longcommand(serial, cmd, arg) != SR_OK)
 416                 return SR_ERR;
 417
 418         return SR_OK;
 419 }
 420
 421 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 422 {
 423         struct dev_context *devc;
 424         struct sr_serial_dev_inst *serial;
 425         uint32_t samplecount, readcount, delaycount;
 426         uint8_t ols_changrp_mask, arg[4];
 427         int num_ols_changrp;
 428         int ret, i;
 429
 430         devc = sdi->priv;
 431         serial = sdi->conn;
 432
 433         ols_channel_mask(sdi);
 434
 435         num_ols_changrp = 0;
 436         ols_changrp_mask = 0;
 437         for (i = 0; i < 4; i++) {
 438                 if (devc->channel_mask & (0xff << (i * 8))) {
 439                         ols_changrp_mask |= (1 << i);
 440                         num_ols_changrp++;
 441                 }
 442         }
 443
 444         /*
 445          * Limit readcount to prevent reading past the end of the hardware
 446          * buffer. Rather read too many samples than too few.
 447          */
 448         samplecount = MIN(devc->max_samples / num_ols_changrp, devc->limit_samples);
 449         readcount = (samplecount + 3) / 4;
 450
 451         /* Basic triggers. */
 452         if (ols_convert_trigger(sdi) != SR_OK) {
 453                 sr_err("Failed to configure channels.");
 454                 return SR_ERR;
 455         }
 456         if (devc->num_stages > 0) {
 457                 /*
 458                  * According to http://mygizmos.org/ols/Logic-Sniffer-FPGA-Spec.pdf
 459                  * reset command must be send prior each arm command
 460                  */
 461                 sr_dbg("Send reset command before trigger configure");
 462                 if (ols_send_reset(serial) != SR_OK)
 463                         return SR_ERR;
 464
 465                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 466                 devc->trigger_at_smpl = (readcount - delaycount) * 4 - devc->num_stages;
 467                 for (i = 0; i <= devc->num_stages; i++) {
 468                         sr_dbg("Setting OLS stage %d trigger.", i);
 469                         if ((ret = set_basic_trigger(sdi, i)) != SR_OK)
 470                                 return ret;
 471                 }
 472         } else {
 473                 /* No triggers configured, force trigger on first stage. */
 474                 sr_dbg("Forcing trigger at stage 0.");
 475                 if ((ret = set_basic_trigger(sdi, 0)) != SR_OK)
 476                         return ret;
 477                 delaycount = readcount;
 478         }
 479
 480         /* Samplerate. */
 481         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 482                         devc->cur_samplerate, devc->cur_samplerate_divider);
 483         arg[0] = devc->cur_samplerate_divider & 0xff;
 484         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 485         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 486         arg[3] = 0x00;
 487         if (send_longcommand(serial, CMD_SET_DIVIDER, arg) != SR_OK)
 488                 return SR_ERR;
 489
 490         /* Send sample limit and pre/post-trigger capture ratio. */
 491         sr_dbg("Setting sample limit %d, trigger point at %d",
 492                         (readcount - 1) * 4, (delaycount - 1) * 4);
 493
 494         if (devc->max_samples > 256 * 1024) {
 495                 arg[0] = ((readcount - 1) & 0xff);
 496                 arg[1] = ((readcount - 1) & 0xff00) >> 8;
 497                 arg[2] = ((readcount - 1) & 0xff0000) >> 16;
 498                 arg[3] = ((readcount - 1) & 0xff000000) >> 24;
 499                 if (send_longcommand(serial, CMD_CAPTURE_READCOUNT, arg) != SR_OK)
 500                         return SR_ERR;
 501                 arg[0] = ((delaycount - 1) & 0xff);
 502                 arg[1] = ((delaycount - 1) & 0xff00) >> 8;
 503                 arg[2] = ((delaycount - 1) & 0xff0000) >> 16;
 504                 arg[3] = ((delaycount - 1) & 0xff000000) >> 24;
 505                 if (send_longcommand(serial, CMD_CAPTURE_DELAYCOUNT, arg) != SR_OK)
 506                         return SR_ERR;
 507         } else {
 508                 arg[0] = ((readcount - 1) & 0xff);
 509                 arg[1] = ((readcount - 1) & 0xff00) >> 8;
 510                 arg[2] = ((delaycount - 1) & 0xff);
 511                 arg[3] = ((delaycount - 1) & 0xff00) >> 8;
 512                 if (send_longcommand(serial, CMD_CAPTURE_SIZE, arg) != SR_OK)
 513                         return SR_ERR;
 514         }
 515
 516         /* Flag register. */
 517         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s, %s clock%s",
 518                         devc->capture_flags & CAPTURE_FLAG_INTERNAL_TEST_MODE ? "on": "off",
 519                         devc->capture_flags & CAPTURE_FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 520                         devc->capture_flags & CAPTURE_FLAG_RLE ? "on" : "off",
 521                         devc->capture_flags & CAPTURE_FLAG_NOISE_FILTER ? "on": "off",
 522                         devc->capture_flags & CAPTURE_FLAG_DEMUX ? "on" : "off",
 523                         devc->capture_flags & CAPTURE_FLAG_CLOCK_EXTERNAL ? "external" : "internal",
 524                         devc->capture_flags & CAPTURE_FLAG_CLOCK_EXTERNAL ? (devc->capture_flags & CAPTURE_FLAG_INVERT_EXT_CLOCK
 525                                 ? " on falling edge" : "on rising edge") : "");
 526
 527         /*
 528          * Enable/disable OLS channel groups in the flag register according
 529          * to the channel mask. 1 means "disable channel".
 530          */
 531         devc->capture_flags &= ~0x3c;
 532         devc->capture_flags |= ~(ols_changrp_mask << 2) & 0x3c;
 533
 534         /* RLE mode is always zero, for now. */
 535
 536         arg[0] = devc->capture_flags & 0xff;
 537         arg[1] = devc->capture_flags >> 8;
 538         arg[2] = arg[3] = 0x00;
 539         if (send_longcommand(serial, CMD_SET_FLAGS, arg) != SR_OK)
 540                 return SR_ERR;
 541
 542         /* Start acquisition on the device. */
 543         if (send_shortcommand(serial, CMD_ARM_BASIC_TRIGGER) != SR_OK)
 544                 return SR_ERR;
 545
 546         /* Reset all operational states. */
 547         devc->rle_count = devc->num_transfers = 0;
 548         devc->num_samples = devc->num_bytes = 0;
 549         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 550         memset(devc->sample, 0, 4);
 551
 552         std_session_send_df_header(sdi);
 553
 554         /* If the device stops sending for longer than it takes to send a byte,
 555          * that means it's finished. But wait at least 100 ms to be safe.
 556          */
 557         serial_source_add(sdi->session, serial, G_IO_IN, 100,
 558                         ols_receive_data, (struct sr_dev_inst *)sdi);
 559
 560         return SR_OK;
 561 }
 562
 563 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 564 {
 565         abort_acquisition(sdi);
 566
 567         return SR_OK;
 568 }
 569
 570 static struct sr_dev_driver ols_driver_info = {
 571         .name = "ols",
 572         .longname = "Openbench Logic Sniffer & SUMP compatibles",
 573         .api_version = 1,
 574         .init = std_init,
 575         .cleanup = std_cleanup,
 576         .scan = scan,
 577         .dev_list = std_dev_list,
 578         .dev_clear = std_dev_clear,
 579         .config_get = config_get,
 580         .config_set = config_set,
 581         .config_list = config_list,
 582         .dev_open = std_serial_dev_open,
 583         .dev_close = std_serial_dev_close,
 584         .dev_acquisition_start = dev_acquisition_start,
 585         .dev_acquisition_stop = dev_acquisition_stop,
 586         .context = NULL,
 587 };
 588 SR_REGISTER_DEV_DRIVER(ols_driver_info);