src/hardware/pipistrello-ols/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 "protocol.h"
  21
  22 static const int32_t hwcaps[] = {
  23         SR_CONF_LOGIC_ANALYZER,
  24         SR_CONF_SAMPLERATE,
  25         SR_CONF_TRIGGER_TYPE,
  26         SR_CONF_CAPTURE_RATIO,
  27         SR_CONF_LIMIT_SAMPLES,
  28         SR_CONF_PATTERN_MODE,
  29         SR_CONF_EXTERNAL_CLOCK,
  30         SR_CONF_SWAP,
  31         SR_CONF_RLE,
  32 };
  33
  34 #define STR_PATTERN_NONE     "None"
  35 #define STR_PATTERN_EXTERNAL "External"
  36 #define STR_PATTERN_INTERNAL "Internal"
  37
  38 /* Supported methods of test pattern outputs */
  39 enum {
  40         /**
  41          * Capture pins 31:16 (unbuffered wing) output a test pattern
  42          * that can captured on pins 0:15.
  43          */
  44         PATTERN_EXTERNAL,
  45
  46         /** Route test pattern internally to capture buffer. */
  47         PATTERN_INTERNAL,
  48 };
  49
  50 static const char *patterns[] = {
  51         STR_PATTERN_NONE,
  52         STR_PATTERN_EXTERNAL,
  53         STR_PATTERN_INTERNAL,
  54 };
  55
  56 /* Channels are numbered 0-31 (on the PCB silkscreen). */
  57 SR_PRIV const char *p_ols_channel_names[NUM_CHANNELS + 1] = {
  58         "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
  59         "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
  60         "24", "25", "26", "27", "28", "29", "30", "31",
  61         NULL,
  62 };
  63
  64 /* Default supported samplerates, can be overridden by device metadata. */
  65 static const uint64_t samplerates[] = {
  66         SR_HZ(10),
  67         SR_MHZ(200),
  68         SR_HZ(1),
  69 };
  70
  71 SR_PRIV struct sr_dev_driver p_ols_driver_info;
  72 static struct sr_dev_driver *di = &p_ols_driver_info;
  73
  74 static int init(struct sr_context *sr_ctx)
  75 {
  76         return std_init(sr_ctx, di, LOG_PREFIX);
  77 }
  78
  79 static GSList *scan(GSList *options)
  80 {
  81         struct sr_dev_inst *sdi;
  82         struct drv_context *drvc;
  83         struct dev_context *devc;
  84         GSList *devices;
  85         int ret, i;
  86         char buf[70];
  87         int bytes_read;
  88
  89         (void)options;
  90
  91         drvc = di->priv;
  92
  93         devices = NULL;
  94
  95         /* Allocate memory for our private device context. */
  96         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
  97                 sr_err("Device context malloc failed.");
  98                 goto err_free_nothing;
  99         }
 100
 101         /* Device-specific settings */
 102         devc->max_samples = devc->max_samplerate = devc->protocol_version = 0;
 103
 104         /* Acquisition settings */
 105         devc->limit_samples = devc->capture_ratio = 0;
 106         devc->trigger_at = -1;
 107         devc->channel_mask = 0xffffffff;
 108         devc->flag_reg = 0;
 109
 110         /* Allocate memory for the incoming ftdi data. */
 111         if (!(devc->ftdi_buf = g_try_malloc0(FTDI_BUF_SIZE))) {
 112                 sr_err("ftdi_buf malloc failed.");
 113                 goto err_free_devc;
 114         }
 115
 116         /* Allocate memory for the FTDI context (ftdic) and initialize it. */
 117         if (!(devc->ftdic = ftdi_new())) {
 118                 sr_err("Failed to initialize libftdi.");
 119                 goto err_free_ftdi_buf;;
 120         }
 121
 122         /* Try to open the FTDI device */
 123         if (p_ols_open(devc) != SR_OK) {
 124                 goto err_free_ftdic;
 125         }
 126
 127         /* The discovery procedure is like this: first send the Reset
 128          * command (0x00) 5 times, since the device could be anywhere
 129          * in a 5-byte command. Then send the ID command (0x02).
 130          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 131          * have a match.
 132          */
 133
 134         ret = SR_OK;
 135         for (i = 0; i < 5; i++) {
 136                 if ((ret = write_shortcommand(devc, CMD_RESET)) != SR_OK) {
 137                         break;
 138                 }
 139         }
 140         if (ret != SR_OK) {
 141                 sr_err("Could not reset device. Quitting.");
 142                 goto err_close_ftdic;
 143         }
 144         write_shortcommand(devc, CMD_ID);
 145
 146         /* Read the response data. */
 147         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 4);
 148         if (bytes_read < 0) {
 149                 sr_err("Failed to read FTDI data (%d): %s.",
 150                        bytes_read, ftdi_get_error_string(devc->ftdic));
 151                 goto err_close_ftdic;
 152         }
 153         if (bytes_read == 0) {
 154                 goto err_close_ftdic;
 155         }
 156
 157         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
 158                 goto err_close_ftdic;
 159
 160         /* Definitely using the OLS protocol, check if it supports
 161          * the metadata command.
 162          */
 163         write_shortcommand(devc, CMD_METADATA);
 164
 165         /* Read the metadata. */
 166         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 64);
 167         if (bytes_read < 0) {
 168                 sr_err("Failed to read FTDI data (%d): %s.",
 169                        bytes_read, ftdi_get_error_string(devc->ftdic));
 170                 goto err_close_ftdic;
 171         }
 172         if (bytes_read == 0) {
 173                 goto err_close_ftdic;
 174         }
 175
 176         /* Close device. We'll reopen it again when we need it. */
 177         p_ols_close(devc);
 178
 179         /* Parse the metadata. */
 180         sdi = p_ols_get_metadata((uint8_t *)buf, bytes_read, devc);
 181         sdi->index = 0;
 182
 183         /* Configure samplerate and divider. */
 184         if (p_ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 185                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 186                                 DEFAULT_SAMPLERATE);
 187         /* Clear trigger masks, values and stages. */
 188         p_ols_configure_channels(sdi);
 189
 190         drvc->instances = g_slist_append(drvc->instances, sdi);
 191         devices = g_slist_append(devices, sdi);
 192
 193         return devices;
 194
 195 err_close_ftdic:
 196         p_ols_close(devc);
 197 err_free_ftdic:
 198         ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
 199 err_free_ftdi_buf:
 200         g_free(devc->ftdi_buf);
 201 err_free_devc:
 202         g_free(devc);
 203 err_free_nothing:
 204
 205         return NULL;
 206 }
 207
 208 static GSList *dev_list(void)
 209 {
 210         return ((struct drv_context *)(di->priv))->instances;
 211 }
 212
 213 static void clear_helper(void *priv)
 214 {
 215         struct dev_context *devc;
 216
 217         devc = priv;
 218
 219         ftdi_free(devc->ftdic);
 220         g_free(devc->ftdi_buf);
 221 }
 222
 223 static int dev_clear(void)
 224 {
 225         return std_dev_clear(di, clear_helper);
 226 }
 227
 228 static int cleanup(void)
 229 {
 230         return dev_clear();
 231 }
 232
 233
 234 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
 235                 const struct sr_channel_group *cg)
 236 {
 237         struct dev_context *devc;
 238
 239         (void)cg;
 240
 241         if (!sdi)
 242                 return SR_ERR_ARG;
 243
 244         devc = sdi->priv;
 245         switch (id) {
 246         case SR_CONF_SAMPLERATE:
 247                 *data = g_variant_new_uint64(devc->cur_samplerate);
 248                 break;
 249         case SR_CONF_CAPTURE_RATIO:
 250                 *data = g_variant_new_uint64(devc->capture_ratio);
 251                 break;
 252         case SR_CONF_LIMIT_SAMPLES:
 253                 *data = g_variant_new_uint64(devc->limit_samples);
 254                 break;
 255         case SR_CONF_PATTERN_MODE:
 256                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 257                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 258                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 259                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 260                 else
 261                         *data = g_variant_new_string(STR_PATTERN_NONE);
 262                 break;
 263         case SR_CONF_RLE:
 264                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 265                 break;
 266         case SR_CONF_EXTERNAL_CLOCK:
 267                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_CLOCK_EXTERNAL ? TRUE : FALSE);
 268                 break;
 269         default:
 270                 return SR_ERR_NA;
 271         }
 272
 273         return SR_OK;
 274 }
 275
 276 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
 277                 const struct sr_channel_group *cg)
 278 {
 279         struct dev_context *devc;
 280         uint16_t flag;
 281         uint64_t tmp_u64;
 282         int ret;
 283         const char *stropt;
 284
 285         (void)cg;
 286
 287         if (sdi->status != SR_ST_ACTIVE)
 288                 return SR_ERR_DEV_CLOSED;
 289
 290         devc = sdi->priv;
 291
 292         switch (id) {
 293         case SR_CONF_SAMPLERATE:
 294                 tmp_u64 = g_variant_get_uint64(data);
 295                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 296                         return SR_ERR_SAMPLERATE;
 297                 ret = p_ols_set_samplerate(sdi, g_variant_get_uint64(data));
 298                 break;
 299         case SR_CONF_LIMIT_SAMPLES:
 300                 tmp_u64 = g_variant_get_uint64(data);
 301                 if (tmp_u64 < MIN_NUM_SAMPLES)
 302                         return SR_ERR;
 303                 devc->limit_samples = tmp_u64;
 304                 ret = SR_OK;
 305                 break;
 306         case SR_CONF_CAPTURE_RATIO:
 307                 devc->capture_ratio = g_variant_get_uint64(data);
 308                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100) {
 309                         devc->capture_ratio = 0;
 310                         ret = SR_ERR;
 311                 } else
 312                         ret = SR_OK;
 313                 break;
 314         case SR_CONF_EXTERNAL_CLOCK:
 315                 if (g_variant_get_boolean(data)) {
 316                         sr_info("Enabling external clock.");
 317                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 318                 } else {
 319                         sr_info("Disabled external clock.");
 320                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 321                 }
 322                 ret = SR_OK;
 323                 break;
 324         case SR_CONF_PATTERN_MODE:
 325                 stropt = g_variant_get_string(data, NULL);
 326                 ret = SR_OK;
 327                 flag = 0xffff;
 328                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 329                         sr_info("Disabling test modes.");
 330                         flag = 0x0000;
 331                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 332                         sr_info("Enabling internal test mode.");
 333                         flag = FLAG_INTERNAL_TEST_MODE;
 334                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 335                         sr_info("Enabling external test mode.");
 336                         flag = FLAG_EXTERNAL_TEST_MODE;
 337                 } else {
 338                         ret = SR_ERR;
 339                 }
 340                 if (flag != 0xffff) {
 341                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 342                         devc->flag_reg |= flag;
 343                 }
 344                 break;
 345         case SR_CONF_SWAP:
 346                 if (g_variant_get_boolean(data)) {
 347                         sr_info("Enabling channel swapping.");
 348                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 349                 } else {
 350                         sr_info("Disabling channel swapping.");
 351                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 352                 }
 353                 ret = SR_OK;
 354                 break;
 355
 356         case SR_CONF_RLE:
 357                 if (g_variant_get_boolean(data)) {
 358                         sr_info("Enabling RLE.");
 359                         devc->flag_reg |= FLAG_RLE;
 360                 } else {
 361                         sr_info("Disabling RLE.");
 362                         devc->flag_reg &= ~FLAG_RLE;
 363                 }
 364                 ret = SR_OK;
 365                 break;
 366         default:
 367                 ret = SR_ERR_NA;
 368         }
 369
 370         return ret;
 371 }
 372
 373 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 374                 const struct sr_channel_group *cg)
 375 {
 376         struct dev_context *devc;
 377         GVariant *gvar, *grange[2];
 378         GVariantBuilder gvb;
 379         int num_channels, i;
 380
 381         (void)cg;
 382
 383         switch (key) {
 384         case SR_CONF_DEVICE_OPTIONS:
 385                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 386                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 387                 break;
 388         case SR_CONF_SAMPLERATE:
 389                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 390                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 391                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 392                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 393                 *data = g_variant_builder_end(&gvb);
 394                 break;
 395         case SR_CONF_TRIGGER_TYPE:
 396                 *data = g_variant_new_string(TRIGGER_TYPE);
 397                 break;
 398         case SR_CONF_PATTERN_MODE:
 399                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 400                 break;
 401         case SR_CONF_LIMIT_SAMPLES:
 402                 if (!sdi)
 403                         return SR_ERR_ARG;
 404                 devc = sdi->priv;
 405                 if (devc->flag_reg & FLAG_RLE)
 406                         return SR_ERR_NA;
 407                 if (devc->max_samples == 0)
 408                         /* Device didn't specify sample memory size in metadata. */
 409                         return SR_ERR_NA;
 410                 /*
 411                  * Channel groups are turned off if no channels in that group are
 412                  * enabled, making more room for samples for the enabled group.
 413                 */
 414                 p_ols_configure_channels(sdi);
 415                 num_channels = 0;
 416                 for (i = 0; i < 4; i++) {
 417                         if (devc->channel_mask & (0xff << (i * 8)))
 418                                 num_channels++;
 419                 }
 420                 if (num_channels == 0) {
 421                         /* This can happen, but shouldn't cause too much drama.
 422                          * However we can't continue because the code below would
 423                          * divide by zero. */
 424                         break;
 425                 }
 426                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 427                 grange[1] = g_variant_new_uint64(devc->max_samples / num_channels);
 428                 *data = g_variant_new_tuple(grange, 2);
 429                 break;
 430         default:
 431                 return SR_ERR_NA;
 432         }
 433
 434         return SR_OK;
 435 }
 436
 437 static int dev_open(struct sr_dev_inst *sdi)
 438 {
 439         struct dev_context *devc;
 440         int ret;
 441
 442         devc = sdi->priv;
 443
 444         if (p_ols_open(devc) != SR_OK) {
 445                 return SR_ERR;
 446         } else {
 447           sdi->status = SR_ST_ACTIVE;
 448                 return SR_OK;
 449         }
 450 }
 451
 452 static int dev_close(struct sr_dev_inst *sdi)
 453 {
 454         int ret;
 455         struct dev_context *devc;
 456
 457         ret = SR_OK;
 458         devc = sdi->priv;
 459
 460         if (sdi->status == SR_ST_ACTIVE) {
 461                 sr_dbg("Status ACTIVE, closing device.");
 462                 ret = p_ols_close(devc);
 463         } else {
 464                 sr_spew("Status not ACTIVE, nothing to do.");
 465         }
 466
 467         sdi->status = SR_ST_INACTIVE;
 468
 469         return ret;
 470 }
 471
 472
 473 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 474 {
 475         struct dev_context *devc;
 476         uint8_t cmd, arg[4];
 477
 478         devc = sdi->priv;
 479
 480         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 481         arg[0] = devc->trigger_mask[stage] & 0xff;
 482         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 483         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 484         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 485         if (write_longcommand(devc, cmd, arg) != SR_OK)
 486                 return SR_ERR;
 487
 488         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 489         arg[0] = devc->trigger_value[stage] & 0xff;
 490         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 491         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 492         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 493         if (write_longcommand(devc, cmd, arg) != SR_OK)
 494                 return SR_ERR;
 495
 496         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 497         arg[0] = arg[1] = arg[3] = 0x00;
 498         arg[2] = stage;
 499         if (stage == devc->num_stages)
 500                 /* Last stage, fire when this one matches. */
 501                 arg[3] |= TRIGGER_START;
 502         if (write_longcommand(devc, cmd, arg) != SR_OK)
 503                 return SR_ERR;
 504
 505         return SR_OK;
 506 }
 507
 508 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 509                 void *cb_data)
 510 {
 511         struct dev_context *devc;
 512         uint32_t samplecount, readcount, delaycount;
 513         uint8_t changrp_mask, arg[4];
 514         int num_channels;
 515         int ret, i;
 516
 517         if (sdi->status != SR_ST_ACTIVE)
 518                 return SR_ERR_DEV_CLOSED;
 519
 520         devc = sdi->priv;
 521
 522         if (p_ols_configure_channels(sdi) != SR_OK) {
 523                 sr_err("Failed to configure channels.");
 524                 return SR_ERR;
 525         }
 526
 527         /*
 528          * Enable/disable channel groups in the flag register according to the
 529          * channel mask. Calculate this here, because num_channels is needed
 530          * to limit readcount.
 531          */
 532         changrp_mask = 0;
 533         num_channels = 0;
 534         for (i = 0; i < 4; i++) {
 535                 if (devc->channel_mask & (0xff << (i * 8))) {
 536                         changrp_mask |= (1 << i);
 537                         num_channels++;
 538                 }
 539         }
 540
 541         /*
 542          * Limit readcount to prevent reading past the end of the hardware
 543          * buffer.
 544          */
 545         sr_dbg("max_samples = %d", devc->max_samples);
 546         sr_dbg("limit_samples = %d", devc->limit_samples);
 547         samplecount = MIN(devc->max_samples / num_channels, devc->limit_samples);
 548         readcount = samplecount / 4;
 549         sr_dbg("Samplecount = %d", samplecount);
 550
 551         /* Rather read too many samples than too few. */
 552         if (samplecount % 4 != 0)
 553                 readcount++;
 554
 555         /* Basic triggers. */
 556         if (devc->trigger_mask[0] != 0x00000000) {
 557                 /* At least one channel has a trigger on it. */
 558                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 559                 devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
 560                 for (i = 0; i <= devc->num_stages; i++) {
 561                         sr_dbg("Setting stage %d trigger.", i);
 562                         if ((ret = set_trigger(sdi, i)) != SR_OK)
 563                                 return ret;
 564                 }
 565         } else {
 566                 /* No triggers configured, force trigger on first stage. */
 567                 sr_dbg("Forcing trigger at stage 0.");
 568                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 569                         return ret;
 570                 delaycount = readcount;
 571         }
 572
 573         /* Samplerate. */
 574         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 575                         devc->cur_samplerate, devc->cur_samplerate_divider);
 576         arg[0] = devc->cur_samplerate_divider & 0xff;
 577         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 578         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 579         arg[3] = 0x00;
 580         if (write_longcommand(devc, CMD_SET_DIVIDER, arg) != SR_OK)
 581                 return SR_ERR;
 582         /* Send extended sample limit and pre/post-trigger capture ratio. */
 583         arg[0] = ((readcount - 1) & 0xff);
 584         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 585         arg[2] = ((readcount - 1) & 0xff0000) >> 16;
 586         arg[3] = ((readcount - 1) & 0xff000000) >> 24;
 587         if (write_longcommand(devc, CMD_CAPTURE_COUNT, arg) != SR_OK)
 588                 return SR_ERR;
 589         arg[0] = ((delaycount - 1) & 0xff);
 590         arg[1] = ((delaycount - 1) & 0xff00) >> 8;
 591         arg[2] = ((delaycount - 1) & 0xff0000) >> 16;
 592         arg[3] = ((delaycount - 1) & 0xff000000) >> 24;
 593         if (write_longcommand(devc, CMD_CAPTURE_DELAY, arg) != SR_OK)
 594                 return SR_ERR;
 595         /* Flag register. */
 596         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 597                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 598                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 599                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 600                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 601                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 602
 603         /* 1 means "disable channel". */
 604         devc->flag_reg |= ~(changrp_mask << 2) & 0x3c;
 605         arg[0] = devc->flag_reg & 0xff;
 606         arg[1] = devc->flag_reg >> 8;
 607         arg[2] = arg[3] = 0x00;
 608         if (write_longcommand(devc, CMD_SET_FLAGS, arg) != SR_OK)
 609                 return SR_ERR;
 610
 611         /* Start acquisition on the device. */
 612         if (write_shortcommand(devc, CMD_RUN) != SR_OK)
 613                 return SR_ERR;
 614
 615         /* Reset all operational states. */
 616         devc->rle_count = devc->num_transfers = 0;
 617         devc->num_samples = devc->num_bytes = 0;
 618         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 619         memset(devc->sample, 0, 4);
 620
 621         /* Send header packet to the session bus. */
 622         std_session_send_df_header(cb_data, LOG_PREFIX);
 623
 624         /* Hook up a dummy handler to receive data from the device. */
 625         sr_source_add(-1, G_IO_IN, 0, p_ols_receive_data, (void *)sdi);
 626
 627         return SR_OK;
 628 }
 629
 630
 631
 632 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 633 {
 634         struct dev_context *devc;
 635         struct sr_datafeed_packet packet;
 636
 637         devc = sdi->priv;
 638
 639         sr_dbg("Stopping acquisition.");
 640         write_shortcommand(devc, CMD_RESET);
 641         write_shortcommand(devc, CMD_RESET);
 642         write_shortcommand(devc, CMD_RESET);
 643         write_shortcommand(devc, CMD_RESET);
 644         write_shortcommand(devc, CMD_RESET);
 645
 646         sr_source_remove(-1);
 647
 648         /* Send end packet to the session bus. */
 649         sr_dbg("Sending SR_DF_END.");
 650         packet.type = SR_DF_END;
 651         sr_session_send(cb_data, &packet);
 652
 653         return SR_OK;
 654 }
 655
 656 SR_PRIV struct sr_dev_driver p_ols_driver_info = {
 657         .name = "p_ols",
 658         .longname = "Pipistrello OLS",
 659         .api_version = 1,
 660         .init = init,
 661         .cleanup = cleanup,
 662         .scan = scan,
 663         .dev_list = dev_list,
 664         .dev_clear = dev_clear,
 665         .config_get = config_get,
 666         .config_set = config_set,
 667         .config_list = config_list,
 668         .dev_open = dev_open,
 669         .dev_close = dev_close,
 670         .dev_acquisition_start = dev_acquisition_start,
 671         .dev_acquisition_stop = dev_acquisition_stop,
 672         .priv = NULL,
 673 };