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 #define USB_VENDOR_ID                   0x0403
  23 #define USB_DEVICE_ID                   0x6010
  24 #define USB_VENDOR_NAME         "Saanlima"
  25 #define USB_IPRODUCT                    "Pipistrello LX45"
  26
  27 static const int32_t hwcaps[] = {
  28         SR_CONF_LOGIC_ANALYZER,
  29         SR_CONF_SAMPLERATE,
  30         SR_CONF_TRIGGER_TYPE,
  31         SR_CONF_CAPTURE_RATIO,
  32         SR_CONF_LIMIT_SAMPLES,
  33         SR_CONF_PATTERN_MODE,
  34         SR_CONF_EXTERNAL_CLOCK,
  35         SR_CONF_SWAP,
  36         SR_CONF_RLE,
  37 };
  38
  39 #define STR_PATTERN_NONE     "None"
  40 #define STR_PATTERN_EXTERNAL "External"
  41 #define STR_PATTERN_INTERNAL "Internal"
  42
  43 /* Supported methods of test pattern outputs */
  44 enum {
  45         /**
  46          * Capture pins 31:16 (unbuffered wing) output a test pattern
  47          * that can captured on pins 0:15.
  48          */
  49         PATTERN_EXTERNAL,
  50
  51         /** Route test pattern internally to capture buffer. */
  52         PATTERN_INTERNAL,
  53 };
  54
  55 static const char *patterns[] = {
  56         STR_PATTERN_NONE,
  57         STR_PATTERN_EXTERNAL,
  58         STR_PATTERN_INTERNAL,
  59 };
  60
  61 /* Channels are numbered 0-31 (on the PCB silkscreen). */
  62 SR_PRIV const char *p_ols_channel_names[NUM_CHANNELS + 1] = {
  63         "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
  64         "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23",
  65         "24", "25", "26", "27", "28", "29", "30", "31",
  66         NULL,
  67 };
  68
  69 /* Default supported samplerates, can be overridden by device metadata. */
  70 static const uint64_t samplerates[] = {
  71         SR_HZ(10),
  72         SR_MHZ(200),
  73         SR_HZ(1),
  74 };
  75
  76 SR_PRIV struct sr_dev_driver p_ols_driver_info;
  77 static struct sr_dev_driver *di = &p_ols_driver_info;
  78
  79 static int init(struct sr_context *sr_ctx)
  80 {
  81         return std_init(sr_ctx, di, LOG_PREFIX);
  82 }
  83
  84 static GSList *scan(GSList *options)
  85 {
  86         struct sr_dev_inst *sdi;
  87         struct drv_context *drvc;
  88         struct dev_context *devc;
  89         GSList *devices;
  90         int ret, i;
  91         char buf[70];
  92         int bytes_read;
  93
  94         (void)options;
  95
  96         drvc = di->priv;
  97
  98         devices = NULL;
  99
 100         /* Allocate memory for our private device context. */
 101         if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 102                 sr_err("Device context malloc failed.");
 103                 goto err_free_nothing;
 104         }
 105
 106         /* Device-specific settings */
 107         devc->max_samples = devc->max_samplerate = devc->protocol_version = 0;
 108
 109         /* Acquisition settings */
 110         devc->limit_samples = devc->capture_ratio = 0;
 111         devc->trigger_at = -1;
 112         devc->channel_mask = 0xffffffff;
 113         devc->flag_reg = 0;
 114
 115         /* Allocate memory for the incoming ftdi data. */
 116         if (!(devc->ftdi_buf = g_try_malloc0(FTDI_BUF_SIZE))) {
 117                 sr_err("ftdi_buf malloc failed.");
 118                 goto err_free_devc;
 119         }
 120
 121         /* Allocate memory for the FTDI context (ftdic) and initialize it. */
 122         if (!(devc->ftdic = ftdi_new())) {
 123                 sr_err("Failed to initialize libftdi.");
 124                 goto err_free_ftdi_buf;;
 125         }
 126
 127         /* Try to open the FTDI device */
 128         if (p_ols_open(devc) != SR_OK) {
 129                 goto err_free_ftdic;
 130         }
 131
 132         /* The discovery procedure is like this: first send the Reset
 133          * command (0x00) 5 times, since the device could be anywhere
 134          * in a 5-byte command. Then send the ID command (0x02).
 135          * If the device responds with 4 bytes ("OLS1" or "SLA1"), we
 136          * have a match.
 137          */
 138
 139         ret = SR_OK;
 140         for (i = 0; i < 5; i++) {
 141                 if ((ret = write_shortcommand(devc, CMD_RESET)) != SR_OK) {
 142                         break;
 143                 }
 144         }
 145         if (ret != SR_OK) {
 146                 sr_err("Could not reset device. Quitting.");
 147                 goto err_close_ftdic;
 148         }
 149         write_shortcommand(devc, CMD_ID);
 150
 151         /* Read the response data. */
 152         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 4);
 153         if (bytes_read < 0) {
 154                 sr_err("Failed to read FTDI data (%d): %s.",
 155                        bytes_read, ftdi_get_error_string(devc->ftdic));
 156                 goto err_close_ftdic;
 157         }
 158         if (bytes_read == 0) {
 159                 goto err_close_ftdic;
 160         }
 161
 162         if (strncmp(buf, "1SLO", 4) && strncmp(buf, "1ALS", 4))
 163                 goto err_close_ftdic;
 164
 165         /* Definitely using the OLS protocol, check if it supports
 166          * the metadata command.
 167          */
 168         write_shortcommand(devc, CMD_METADATA);
 169
 170         /* Read the metadata. */
 171         bytes_read = ftdi_read_data(devc->ftdic, (uint8_t *)buf, 64);
 172         if (bytes_read < 0) {
 173                 sr_err("Failed to read FTDI data (%d): %s.",
 174                        bytes_read, ftdi_get_error_string(devc->ftdic));
 175                 goto err_close_ftdic;
 176         }
 177         if (bytes_read == 0) {
 178                 goto err_close_ftdic;
 179         }
 180
 181         /* Close device. We'll reopen it again when we need it. */
 182         p_ols_close(devc);
 183
 184         /* Parse the metadata. */
 185         sdi = p_ols_get_metadata((uint8_t *)buf, bytes_read, devc);
 186         sdi->index = 0;
 187
 188         /* Configure samplerate and divider. */
 189         if (p_ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
 190                 sr_dbg("Failed to set default samplerate (%"PRIu64").",
 191                                 DEFAULT_SAMPLERATE);
 192         /* Clear trigger masks, values and stages. */
 193         p_ols_configure_channels(sdi);
 194
 195         drvc->instances = g_slist_append(drvc->instances, sdi);
 196         devices = g_slist_append(devices, sdi);
 197
 198         return devices;
 199
 200 err_close_ftdic:
 201         p_ols_close(devc);
 202 err_free_ftdic:
 203         ftdi_free(devc->ftdic); /* NOT free() or g_free()! */
 204 err_free_ftdi_buf:
 205         g_free(devc->ftdi_buf);
 206 err_free_devc:
 207         g_free(devc);
 208 err_free_nothing:
 209
 210         return NULL;
 211 }
 212
 213 static GSList *dev_list(void)
 214 {
 215         return ((struct drv_context *)(di->priv))->instances;
 216 }
 217
 218 static void clear_helper(void *priv)
 219 {
 220         struct dev_context *devc;
 221
 222         devc = priv;
 223
 224         ftdi_free(devc->ftdic);
 225         g_free(devc->ftdi_buf);
 226 }
 227
 228 static int dev_clear(void)
 229 {
 230         return std_dev_clear(di, clear_helper);
 231 }
 232
 233 static int cleanup(void)
 234 {
 235         return dev_clear();
 236 }
 237
 238
 239 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
 240                 const struct sr_channel_group *cg)
 241 {
 242         struct dev_context *devc;
 243
 244         (void)cg;
 245
 246         if (!sdi)
 247                 return SR_ERR_ARG;
 248
 249         devc = sdi->priv;
 250         switch (id) {
 251         case SR_CONF_SAMPLERATE:
 252                 *data = g_variant_new_uint64(devc->cur_samplerate);
 253                 break;
 254         case SR_CONF_CAPTURE_RATIO:
 255                 *data = g_variant_new_uint64(devc->capture_ratio);
 256                 break;
 257         case SR_CONF_LIMIT_SAMPLES:
 258                 *data = g_variant_new_uint64(devc->limit_samples);
 259                 break;
 260         case SR_CONF_PATTERN_MODE:
 261                 if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
 262                         *data = g_variant_new_string(STR_PATTERN_EXTERNAL);
 263                 else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
 264                         *data = g_variant_new_string(STR_PATTERN_INTERNAL);
 265                 else
 266                         *data = g_variant_new_string(STR_PATTERN_NONE);
 267                 break;
 268         case SR_CONF_RLE:
 269                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 270                 break;
 271         case SR_CONF_EXTERNAL_CLOCK:
 272                 *data = g_variant_new_boolean(devc->flag_reg & FLAG_CLOCK_EXTERNAL ? TRUE : FALSE);
 273                 break;
 274         default:
 275                 return SR_ERR_NA;
 276         }
 277
 278         return SR_OK;
 279 }
 280
 281 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
 282                 const struct sr_channel_group *cg)
 283 {
 284         struct dev_context *devc;
 285         uint16_t flag;
 286         uint64_t tmp_u64;
 287         int ret;
 288         const char *stropt;
 289
 290         (void)cg;
 291
 292         if (sdi->status != SR_ST_ACTIVE)
 293                 return SR_ERR_DEV_CLOSED;
 294
 295         devc = sdi->priv;
 296
 297         switch (id) {
 298         case SR_CONF_SAMPLERATE:
 299                 tmp_u64 = g_variant_get_uint64(data);
 300                 if (tmp_u64 < samplerates[0] || tmp_u64 > samplerates[1])
 301                         return SR_ERR_SAMPLERATE;
 302                 ret = p_ols_set_samplerate(sdi, g_variant_get_uint64(data));
 303                 break;
 304         case SR_CONF_LIMIT_SAMPLES:
 305                 tmp_u64 = g_variant_get_uint64(data);
 306                 if (tmp_u64 < MIN_NUM_SAMPLES)
 307                         return SR_ERR;
 308                 devc->limit_samples = tmp_u64;
 309                 ret = SR_OK;
 310                 break;
 311         case SR_CONF_CAPTURE_RATIO:
 312                 devc->capture_ratio = g_variant_get_uint64(data);
 313                 if (devc->capture_ratio < 0 || devc->capture_ratio > 100) {
 314                         devc->capture_ratio = 0;
 315                         ret = SR_ERR;
 316                 } else
 317                         ret = SR_OK;
 318                 break;
 319         case SR_CONF_EXTERNAL_CLOCK:
 320                 if (g_variant_get_boolean(data)) {
 321                         sr_info("Enabling external clock.");
 322                         devc->flag_reg |= FLAG_CLOCK_EXTERNAL;
 323                 } else {
 324                         sr_info("Disabled external clock.");
 325                         devc->flag_reg &= ~FLAG_CLOCK_EXTERNAL;
 326                 }
 327                 ret = SR_OK;
 328                 break;
 329         case SR_CONF_PATTERN_MODE:
 330                 stropt = g_variant_get_string(data, NULL);
 331                 ret = SR_OK;
 332                 flag = 0xffff;
 333                 if (!strcmp(stropt, STR_PATTERN_NONE)) {
 334                         sr_info("Disabling test modes.");
 335                         flag = 0x0000;
 336                 }else if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
 337                         sr_info("Enabling internal test mode.");
 338                         flag = FLAG_INTERNAL_TEST_MODE;
 339                 } else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
 340                         sr_info("Enabling external test mode.");
 341                         flag = FLAG_EXTERNAL_TEST_MODE;
 342                 } else {
 343                         ret = SR_ERR;
 344                 }
 345                 if (flag != 0xffff) {
 346                         devc->flag_reg &= ~(FLAG_INTERNAL_TEST_MODE | FLAG_EXTERNAL_TEST_MODE);
 347                         devc->flag_reg |= flag;
 348                 }
 349                 break;
 350         case SR_CONF_SWAP:
 351                 if (g_variant_get_boolean(data)) {
 352                         sr_info("Enabling channel swapping.");
 353                         devc->flag_reg |= FLAG_SWAP_CHANNELS;
 354                 } else {
 355                         sr_info("Disabling channel swapping.");
 356                         devc->flag_reg &= ~FLAG_SWAP_CHANNELS;
 357                 }
 358                 ret = SR_OK;
 359                 break;
 360
 361         case SR_CONF_RLE:
 362                 if (g_variant_get_boolean(data)) {
 363                         sr_info("Enabling RLE.");
 364                         devc->flag_reg |= FLAG_RLE;
 365                 } else {
 366                         sr_info("Disabling RLE.");
 367                         devc->flag_reg &= ~FLAG_RLE;
 368                 }
 369                 ret = SR_OK;
 370                 break;
 371         default:
 372                 ret = SR_ERR_NA;
 373         }
 374
 375         return ret;
 376 }
 377
 378 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 379                 const struct sr_channel_group *cg)
 380 {
 381         struct dev_context *devc;
 382         GVariant *gvar, *grange[2];
 383         GVariantBuilder gvb;
 384         int num_channels, i;
 385
 386         (void)cg;
 387
 388         switch (key) {
 389         case SR_CONF_DEVICE_OPTIONS:
 390                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 391                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 392                 break;
 393         case SR_CONF_SAMPLERATE:
 394                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 395                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 396                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 397                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 398                 *data = g_variant_builder_end(&gvb);
 399                 break;
 400         case SR_CONF_TRIGGER_TYPE:
 401                 *data = g_variant_new_string(TRIGGER_TYPE);
 402                 break;
 403         case SR_CONF_PATTERN_MODE:
 404                 *data = g_variant_new_strv(patterns, ARRAY_SIZE(patterns));
 405                 break;
 406         case SR_CONF_LIMIT_SAMPLES:
 407                 if (!sdi)
 408                         return SR_ERR_ARG;
 409                 devc = sdi->priv;
 410                 if (devc->flag_reg & FLAG_RLE)
 411                         return SR_ERR_NA;
 412                 if (devc->max_samples == 0)
 413                         /* Device didn't specify sample memory size in metadata. */
 414                         return SR_ERR_NA;
 415                 /*
 416                  * Channel groups are turned off if no channels in that group are
 417                  * enabled, making more room for samples for the enabled group.
 418                 */
 419                 p_ols_configure_channels(sdi);
 420                 num_channels = 0;
 421                 for (i = 0; i < 4; i++) {
 422                         if (devc->channel_mask & (0xff << (i * 8)))
 423                                 num_channels++;
 424                 }
 425                 if (num_channels == 0) {
 426                         /* This can happen, but shouldn't cause too much drama.
 427                          * However we can't continue because the code below would
 428                          * divide by zero. */
 429                         break;
 430                 }
 431                 grange[0] = g_variant_new_uint64(MIN_NUM_SAMPLES);
 432                 grange[1] = g_variant_new_uint64(devc->max_samples / num_channels);
 433                 *data = g_variant_new_tuple(grange, 2);
 434                 break;
 435         default:
 436                 return SR_ERR_NA;
 437         }
 438
 439         return SR_OK;
 440 }
 441
 442 static int dev_open(struct sr_dev_inst *sdi)
 443 {
 444         struct dev_context *devc;
 445         int ret;
 446
 447         devc = sdi->priv;
 448
 449         if (p_ols_open(devc) != SR_OK) {
 450                 return SR_ERR;
 451         } else {
 452           sdi->status = SR_ST_ACTIVE;
 453                 return SR_OK;
 454         }
 455 }
 456
 457 static int dev_close(struct sr_dev_inst *sdi)
 458 {
 459         int ret;
 460         struct dev_context *devc;
 461
 462         ret = SR_OK;
 463         devc = sdi->priv;
 464
 465         if (sdi->status == SR_ST_ACTIVE) {
 466                 sr_dbg("Status ACTIVE, closing device.");
 467                 ret = p_ols_close(devc);
 468         } else {
 469                 sr_spew("Status not ACTIVE, nothing to do.");
 470         }
 471
 472         sdi->status = SR_ST_INACTIVE;
 473
 474         return ret;
 475 }
 476
 477
 478 static int set_trigger(const struct sr_dev_inst *sdi, int stage)
 479 {
 480         struct dev_context *devc;
 481         uint8_t cmd, arg[4];
 482
 483         devc = sdi->priv;
 484
 485         cmd = CMD_SET_TRIGGER_MASK + stage * 4;
 486         arg[0] = devc->trigger_mask[stage] & 0xff;
 487         arg[1] = (devc->trigger_mask[stage] >> 8) & 0xff;
 488         arg[2] = (devc->trigger_mask[stage] >> 16) & 0xff;
 489         arg[3] = (devc->trigger_mask[stage] >> 24) & 0xff;
 490         if (write_longcommand(devc, cmd, arg) != SR_OK)
 491                 return SR_ERR;
 492
 493         cmd = CMD_SET_TRIGGER_VALUE + stage * 4;
 494         arg[0] = devc->trigger_value[stage] & 0xff;
 495         arg[1] = (devc->trigger_value[stage] >> 8) & 0xff;
 496         arg[2] = (devc->trigger_value[stage] >> 16) & 0xff;
 497         arg[3] = (devc->trigger_value[stage] >> 24) & 0xff;
 498         if (write_longcommand(devc, cmd, arg) != SR_OK)
 499                 return SR_ERR;
 500
 501         cmd = CMD_SET_TRIGGER_CONFIG + stage * 4;
 502         arg[0] = arg[1] = arg[3] = 0x00;
 503         arg[2] = stage;
 504         if (stage == devc->num_stages)
 505                 /* Last stage, fire when this one matches. */
 506                 arg[3] |= TRIGGER_START;
 507         if (write_longcommand(devc, cmd, arg) != SR_OK)
 508                 return SR_ERR;
 509
 510         return SR_OK;
 511 }
 512
 513 static int dev_acquisition_start(const struct sr_dev_inst *sdi,
 514                 void *cb_data)
 515 {
 516         struct dev_context *devc;
 517         uint32_t samplecount, readcount, delaycount;
 518         uint8_t changrp_mask, arg[4];
 519         int num_channels;
 520         int ret, i;
 521
 522         if (sdi->status != SR_ST_ACTIVE)
 523                 return SR_ERR_DEV_CLOSED;
 524
 525         devc = sdi->priv;
 526
 527         if (p_ols_configure_channels(sdi) != SR_OK) {
 528                 sr_err("Failed to configure channels.");
 529                 return SR_ERR;
 530         }
 531
 532         /*
 533          * Enable/disable channel groups in the flag register according to the
 534          * channel mask. Calculate this here, because num_channels is needed
 535          * to limit readcount.
 536          */
 537         changrp_mask = 0;
 538         num_channels = 0;
 539         for (i = 0; i < 4; i++) {
 540                 if (devc->channel_mask & (0xff << (i * 8))) {
 541                         changrp_mask |= (1 << i);
 542                         num_channels++;
 543                 }
 544         }
 545
 546         /*
 547          * Limit readcount to prevent reading past the end of the hardware
 548          * buffer.
 549          */
 550         sr_dbg("max_samples = %d", devc->max_samples);
 551         sr_dbg("limit_samples = %d", devc->limit_samples);
 552         samplecount = MIN(devc->max_samples / num_channels, devc->limit_samples);
 553         readcount = samplecount / 4;
 554         sr_dbg("Samplecount = %d", samplecount);
 555
 556         /* Rather read too many samples than too few. */
 557         if (samplecount % 4 != 0)
 558                 readcount++;
 559
 560         /* Basic triggers. */
 561         if (devc->trigger_mask[0] != 0x00000000) {
 562                 /* At least one channel has a trigger on it. */
 563                 delaycount = readcount * (1 - devc->capture_ratio / 100.0);
 564                 devc->trigger_at = (readcount - delaycount) * 4 - devc->num_stages;
 565                 for (i = 0; i <= devc->num_stages; i++) {
 566                         sr_dbg("Setting stage %d trigger.", i);
 567                         if ((ret = set_trigger(sdi, i)) != SR_OK)
 568                                 return ret;
 569                 }
 570         } else {
 571                 /* No triggers configured, force trigger on first stage. */
 572                 sr_dbg("Forcing trigger at stage 0.");
 573                 if ((ret = set_trigger(sdi, 0)) != SR_OK)
 574                         return ret;
 575                 delaycount = readcount;
 576         }
 577
 578         /* Samplerate. */
 579         sr_dbg("Setting samplerate to %" PRIu64 "Hz (divider %u)",
 580                         devc->cur_samplerate, devc->cur_samplerate_divider);
 581         arg[0] = devc->cur_samplerate_divider & 0xff;
 582         arg[1] = (devc->cur_samplerate_divider & 0xff00) >> 8;
 583         arg[2] = (devc->cur_samplerate_divider & 0xff0000) >> 16;
 584         arg[3] = 0x00;
 585         if (write_longcommand(devc, CMD_SET_DIVIDER, arg) != SR_OK)
 586                 return SR_ERR;
 587         /* Send extended sample limit and pre/post-trigger capture ratio. */
 588         arg[0] = ((readcount - 1) & 0xff);
 589         arg[1] = ((readcount - 1) & 0xff00) >> 8;
 590         arg[2] = ((readcount - 1) & 0xff0000) >> 16;
 591         arg[3] = ((readcount - 1) & 0xff000000) >> 24;
 592         if (write_longcommand(devc, CMD_CAPTURE_COUNT, arg) != SR_OK)
 593                 return SR_ERR;
 594         arg[0] = ((delaycount - 1) & 0xff);
 595         arg[1] = ((delaycount - 1) & 0xff00) >> 8;
 596         arg[2] = ((delaycount - 1) & 0xff0000) >> 16;
 597         arg[3] = ((delaycount - 1) & 0xff000000) >> 24;
 598         if (write_longcommand(devc, CMD_CAPTURE_DELAY, arg) != SR_OK)
 599                 return SR_ERR;
 600         /* Flag register. */
 601         sr_dbg("Setting intpat %s, extpat %s, RLE %s, noise_filter %s, demux %s",
 602                         devc->flag_reg & FLAG_INTERNAL_TEST_MODE ? "on": "off",
 603                         devc->flag_reg & FLAG_EXTERNAL_TEST_MODE ? "on": "off",
 604                         devc->flag_reg & FLAG_RLE ? "on" : "off",
 605                         devc->flag_reg & FLAG_FILTER ? "on": "off",
 606                         devc->flag_reg & FLAG_DEMUX ? "on" : "off");
 607
 608         /* 1 means "disable channel". */
 609         devc->flag_reg |= ~(changrp_mask << 2) & 0x3c;
 610         arg[0] = devc->flag_reg & 0xff;
 611         arg[1] = devc->flag_reg >> 8;
 612         arg[2] = arg[3] = 0x00;
 613         if (write_longcommand(devc, CMD_SET_FLAGS, arg) != SR_OK)
 614                 return SR_ERR;
 615
 616         /* Start acquisition on the device. */
 617         if (write_shortcommand(devc, CMD_RUN) != SR_OK)
 618                 return SR_ERR;
 619
 620         /* Reset all operational states. */
 621         devc->rle_count = devc->num_transfers = 0;
 622         devc->num_samples = devc->num_bytes = 0;
 623         devc->cnt_bytes = devc->cnt_samples = devc->cnt_samples_rle = 0;
 624         memset(devc->sample, 0, 4);
 625
 626         /* Send header packet to the session bus. */
 627         std_session_send_df_header(cb_data, LOG_PREFIX);
 628
 629         /* Hook up a dummy handler to receive data from the device. */
 630         sr_source_add(-1, G_IO_IN, 0, p_ols_receive_data, (void *)sdi);
 631
 632         return SR_OK;
 633 }
 634
 635
 636
 637 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 638 {
 639         struct dev_context *devc;
 640         struct sr_datafeed_packet packet;
 641
 642         devc = sdi->priv;
 643
 644         sr_dbg("Stopping acquisition.");
 645         write_shortcommand(devc, CMD_RESET);
 646         write_shortcommand(devc, CMD_RESET);
 647         write_shortcommand(devc, CMD_RESET);
 648         write_shortcommand(devc, CMD_RESET);
 649         write_shortcommand(devc, CMD_RESET);
 650
 651         sr_source_remove(-1);
 652
 653         /* Send end packet to the session bus. */
 654         sr_dbg("Sending SR_DF_END.");
 655         packet.type = SR_DF_END;
 656         sr_session_send(cb_data, &packet);
 657
 658         return SR_OK;
 659 }
 660
 661 SR_PRIV struct sr_dev_driver p_ols_driver_info = {
 662         .name = "p_ols",
 663         .longname = "Pipistrello OLS",
 664         .api_version = 1,
 665         .init = init,
 666         .cleanup = cleanup,
 667         .scan = scan,
 668         .dev_list = dev_list,
 669         .dev_clear = dev_clear,
 670         .config_get = config_get,
 671         .config_set = config_set,
 672         .config_list = config_list,
 673         .dev_open = dev_open,
 674         .dev_close = dev_close,
 675         .dev_acquisition_start = dev_acquisition_start,
 676         .dev_acquisition_stop = dev_acquisition_stop,
 677         .priv = NULL,
 678 };