src/hardware/zeroplus-logic-cube/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2010-2012 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 VENDOR_NAME                     "ZEROPLUS"
  24 #define USB_INTERFACE                   0
  25 #define USB_CONFIGURATION               1
  26 #define NUM_TRIGGER_STAGES              4
  27 #define PACKET_SIZE                     2048    /* ?? */
  28
  29 //#define ZP_EXPERIMENTAL
  30
  31 struct zp_model {
  32         uint16_t vid;
  33         uint16_t pid;
  34         const char *model_name;
  35         unsigned int channels;
  36         unsigned int sample_depth;      /* In Ksamples/channel */
  37         unsigned int max_sampling_freq;
  38 };
  39
  40 /*
  41  * Note -- 16032, 16064 and 16128 *usually* -- but not always -- have the
  42  * same 128K sample depth.
  43  */
  44 static const struct zp_model zeroplus_models[] = {
  45         {0x0c12, 0x7002, "LAP-16128U",    16, 128,  200},
  46         {0x0c12, 0x7009, "LAP-C(16064)",  16, 64,   100},
  47         {0x0c12, 0x700a, "LAP-C(16128)",  16, 128,  200},
  48         {0x0c12, 0x700b, "LAP-C(32128)",  32, 128,  200},
  49         {0x0c12, 0x700c, "LAP-C(321000)", 32, 1024, 200},
  50         {0x0c12, 0x700d, "LAP-C(322000)", 32, 2048, 200},
  51         {0x0c12, 0x700e, "LAP-C(16032)",  16, 32,   100},
  52         {0x0c12, 0x7016, "LAP-C(162000)", 16, 2048, 200},
  53         {0x0c12, 0x7100, "AKIP-9101", 16, 256, 200},
  54         ALL_ZERO
  55 };
  56
  57 static const uint32_t devopts[] = {
  58         SR_CONF_LOGIC_ANALYZER,
  59         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET | SR_CONF_LIST,
  60         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  61         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  62         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  63         SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  64 };
  65
  66 static const int32_t trigger_matches[] = {
  67         SR_TRIGGER_ZERO,
  68         SR_TRIGGER_ONE,
  69 };
  70
  71 /*
  72  * ZEROPLUS LAP-C (16032) numbers the 16 channels A0-A7 and B0-B7.
  73  * We currently ignore other untested/unsupported devices here.
  74  */
  75 static const char *channel_names[] = {
  76         "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
  77         "B0", "B1", "B2", "B3", "B4", "B5", "B6", "B7",
  78         "C0", "C1", "C2", "C3", "C4", "C5", "C6", "C7",
  79         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
  80 };
  81
  82 /*
  83  * The hardware supports more samplerates than these, but these are the
  84  * options hardcoded into the vendor's Windows GUI.
  85  */
  86
  87 static const uint64_t samplerates_100[] = {
  88         SR_HZ(100),
  89         SR_HZ(500),
  90         SR_KHZ(1),
  91         SR_KHZ(5),
  92         SR_KHZ(25),
  93         SR_KHZ(50),
  94         SR_KHZ(100),
  95         SR_KHZ(200),
  96         SR_KHZ(400),
  97         SR_KHZ(800),
  98         SR_MHZ(1),
  99         SR_MHZ(10),
 100         SR_MHZ(25),
 101         SR_MHZ(50),
 102         SR_MHZ(80),
 103         SR_MHZ(100),
 104 };
 105
 106 const uint64_t samplerates_200[] = {
 107         SR_HZ(100),
 108         SR_HZ(500),
 109         SR_KHZ(1),
 110         SR_KHZ(5),
 111         SR_KHZ(25),
 112         SR_KHZ(50),
 113         SR_KHZ(100),
 114         SR_KHZ(200),
 115         SR_KHZ(400),
 116         SR_KHZ(800),
 117         SR_MHZ(1),
 118         SR_MHZ(10),
 119         SR_MHZ(25),
 120         SR_MHZ(50),
 121         SR_MHZ(80),
 122         SR_MHZ(100),
 123         SR_MHZ(150),
 124         SR_MHZ(200),
 125 };
 126
 127 static int dev_close(struct sr_dev_inst *sdi);
 128
 129 SR_PRIV int zp_set_samplerate(struct dev_context *devc, uint64_t samplerate)
 130 {
 131         int i;
 132
 133         for (i = 0; ARRAY_SIZE(samplerates_200); i++)
 134                 if (samplerate == samplerates_200[i])
 135                         break;
 136
 137         if (i == ARRAY_SIZE(samplerates_200) || samplerate > devc->max_samplerate) {
 138                 sr_err("Unsupported samplerate: %" PRIu64 "Hz.", samplerate);
 139                 return SR_ERR_ARG;
 140         }
 141
 142         sr_info("Setting samplerate to %" PRIu64 "Hz.", samplerate);
 143
 144         if (samplerate >= SR_MHZ(1))
 145                 analyzer_set_freq(samplerate / SR_MHZ(1), FREQ_SCALE_MHZ);
 146         else if (samplerate >= SR_KHZ(1))
 147                 analyzer_set_freq(samplerate / SR_KHZ(1), FREQ_SCALE_KHZ);
 148         else
 149                 analyzer_set_freq(samplerate, FREQ_SCALE_HZ);
 150
 151         devc->cur_samplerate = samplerate;
 152
 153         return SR_OK;
 154 }
 155
 156 static GSList *scan(struct sr_dev_driver *di, GSList *options)
 157 {
 158         struct sr_dev_inst *sdi;
 159         struct drv_context *drvc;
 160         struct dev_context *devc;
 161         const struct zp_model *prof;
 162         struct libusb_device_descriptor des;
 163         struct libusb_device_handle *hdl;
 164         libusb_device **devlist;
 165         GSList *devices;
 166         int ret, i, j;
 167         char serial_num[64], connection_id[64];
 168
 169         (void)options;
 170
 171         drvc = di->context;
 172
 173         devices = NULL;
 174
 175         /* Find all ZEROPLUS analyzers and add them to device list. */
 176         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); /* TODO: Errors. */
 177
 178         for (i = 0; devlist[i]; i++) {
 179                 libusb_get_device_descriptor(devlist[i], &des);
 180
 181                 if ((ret = libusb_open(devlist[i], &hdl)) < 0)
 182                         continue;
 183
 184                 if (des.iSerialNumber == 0) {
 185                         serial_num[0] = '\0';
 186                 } else if ((ret = libusb_get_string_descriptor_ascii(hdl,
 187                                 des.iSerialNumber, (unsigned char *) serial_num,
 188                                 sizeof(serial_num))) < 0) {
 189                         sr_warn("Failed to get serial number string descriptor: %s.",
 190                                 libusb_error_name(ret));
 191                         continue;
 192                 }
 193
 194                 libusb_close(hdl);
 195
 196                 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 197
 198                 prof = NULL;
 199                 for (j = 0; j < zeroplus_models[j].vid; j++) {
 200                         if (des.idVendor == zeroplus_models[j].vid &&
 201                                 des.idProduct == zeroplus_models[j].pid) {
 202                                 prof = &zeroplus_models[j];
 203                         }
 204                 }
 205                 /* Skip if the device was not found. */
 206                 if (!prof)
 207                         continue;
 208                 sr_info("Found ZEROPLUS %s.", prof->model_name);
 209
 210                 /* Register the device with libsigrok. */
 211                 sdi = g_malloc0(sizeof(struct sr_dev_inst));
 212                 sdi->status = SR_ST_INACTIVE;
 213                 sdi->vendor = g_strdup(VENDOR_NAME);
 214                 sdi->model = g_strdup(prof->model_name);
 215                 sdi->driver = di;
 216                 sdi->serial_num = g_strdup(serial_num);
 217                 sdi->connection_id = g_strdup(connection_id);
 218
 219                 /* Allocate memory for our private driver context. */
 220                 devc = g_malloc0(sizeof(struct dev_context));
 221                 sdi->priv = devc;
 222                 devc->prof = prof;
 223                 devc->num_channels = prof->channels;
 224 #ifdef ZP_EXPERIMENTAL
 225                 devc->max_sample_depth = 128 * 1024;
 226                 devc->max_samplerate = 200;
 227 #else
 228                 devc->max_sample_depth = prof->sample_depth * 1024;
 229                 devc->max_samplerate = prof->max_sampling_freq;
 230 #endif
 231                 devc->max_samplerate *= SR_MHZ(1);
 232                 devc->memory_size = MEMORY_SIZE_8K;
 233                 // memset(devc->trigger_buffer, 0, NUM_TRIGGER_STAGES);
 234
 235                 /* Fill in channellist according to this device's profile. */
 236                 for (j = 0; j < devc->num_channels; j++)
 237                         sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
 238                                         channel_names[j]);
 239
 240                 devices = g_slist_append(devices, sdi);
 241                 drvc->instances = g_slist_append(drvc->instances, sdi);
 242                 sdi->inst_type = SR_INST_USB;
 243                 sdi->conn = sr_usb_dev_inst_new(
 244                         libusb_get_bus_number(devlist[i]),
 245                         libusb_get_device_address(devlist[i]), NULL);
 246         }
 247         libusb_free_device_list(devlist, 1);
 248
 249         return devices;
 250 }
 251
 252 static int dev_open(struct sr_dev_inst *sdi)
 253 {
 254         struct sr_dev_driver *di = sdi->driver;
 255         struct dev_context *devc;
 256         struct drv_context *drvc;
 257         struct sr_usb_dev_inst *usb;
 258         int ret;
 259
 260         drvc = di->context;
 261         usb = sdi->conn;
 262         devc = sdi->priv;
 263
 264         ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
 265         if (ret != SR_OK)
 266                 return ret;
 267
 268         sdi->status = SR_ST_ACTIVE;
 269
 270         ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION);
 271         if (ret < 0) {
 272                 sr_err("Unable to set USB configuration %d: %s.",
 273                        USB_CONFIGURATION, libusb_error_name(ret));
 274                 return SR_ERR;
 275         }
 276
 277         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 278         if (ret != 0) {
 279                 sr_err("Unable to claim interface: %s.",
 280                        libusb_error_name(ret));
 281                 return SR_ERR;
 282         }
 283
 284         /* Set default configuration after power on. */
 285         if (analyzer_read_status(usb->devhdl) == 0)
 286                 analyzer_configure(usb->devhdl);
 287
 288         analyzer_reset(usb->devhdl);
 289         analyzer_initialize(usb->devhdl);
 290
 291         //analyzer_set_memory_size(MEMORY_SIZE_512K);
 292         // analyzer_set_freq(g_freq, g_freq_scale);
 293         analyzer_set_trigger_count(1);
 294         // analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
 295         // * get_memory_size(g_memory_size)) / 100) >> 2);
 296
 297 #if 0
 298         if (g_double_mode == 1)
 299                 analyzer_set_compression(COMPRESSION_DOUBLE);
 300         else if (g_compression == 1)
 301                 analyzer_set_compression(COMPRESSION_ENABLE);
 302         else
 303 #endif
 304         analyzer_set_compression(COMPRESSION_NONE);
 305
 306         if (devc->cur_samplerate == 0) {
 307                 /* Samplerate hasn't been set. Default to 1MHz. */
 308                 analyzer_set_freq(1, FREQ_SCALE_MHZ);
 309                 devc->cur_samplerate = SR_MHZ(1);
 310         }
 311
 312         if (devc->cur_threshold == 0)
 313                 set_voltage_threshold(devc, 1.5);
 314
 315         return SR_OK;
 316 }
 317
 318 static int dev_close(struct sr_dev_inst *sdi)
 319 {
 320         struct sr_usb_dev_inst *usb;
 321
 322         usb = sdi->conn;
 323
 324         if (!usb->devhdl)
 325                 return SR_ERR;
 326
 327         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 328                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 329         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 330         libusb_reset_device(usb->devhdl);
 331         libusb_close(usb->devhdl);
 332         usb->devhdl = NULL;
 333         sdi->status = SR_ST_INACTIVE;
 334
 335         return SR_OK;
 336 }
 337
 338 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 339                 const struct sr_channel_group *cg)
 340 {
 341         struct dev_context *devc;
 342         GVariant *range[2];
 343
 344         (void)cg;
 345
 346         if (!sdi)
 347                 return SR_ERR_ARG;
 348
 349         devc = sdi->priv;
 350
 351         switch (key) {
 352         case SR_CONF_SAMPLERATE:
 353                 *data = g_variant_new_uint64(devc->cur_samplerate);
 354                 break;
 355         case SR_CONF_CAPTURE_RATIO:
 356                 *data = g_variant_new_uint64(devc->capture_ratio);
 357                 break;
 358         case SR_CONF_VOLTAGE_THRESHOLD:
 359                 range[0] = g_variant_new_double(devc->cur_threshold);
 360                 range[1] = g_variant_new_double(devc->cur_threshold);
 361                 *data = g_variant_new_tuple(range, 2);
 362                 break;
 363         default:
 364                 return SR_ERR_NA;
 365         }
 366
 367         return SR_OK;
 368 }
 369
 370 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 371                 const struct sr_channel_group *cg)
 372 {
 373         struct dev_context *devc;
 374         gdouble low, high;
 375
 376         (void)cg;
 377
 378         if (sdi->status != SR_ST_ACTIVE)
 379                 return SR_ERR_DEV_CLOSED;
 380
 381         devc = sdi->priv;
 382
 383         switch (key) {
 384         case SR_CONF_SAMPLERATE:
 385                 return zp_set_samplerate(devc, g_variant_get_uint64(data));
 386         case SR_CONF_LIMIT_SAMPLES:
 387                 return set_limit_samples(devc, g_variant_get_uint64(data));
 388         case SR_CONF_CAPTURE_RATIO:
 389                 return set_capture_ratio(devc, g_variant_get_uint64(data));
 390         case SR_CONF_VOLTAGE_THRESHOLD:
 391                 g_variant_get(data, "(dd)", &low, &high);
 392                 return set_voltage_threshold(devc, (low + high) / 2.0);
 393         default:
 394                 return SR_ERR_NA;
 395         }
 396
 397         return SR_OK;
 398 }
 399
 400 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 401                 const struct sr_channel_group *cg)
 402 {
 403         struct dev_context *devc;
 404         GVariant *gvar, *grange[2];
 405         GVariantBuilder gvb;
 406         double v;
 407         GVariant *range[2];
 408
 409         (void)cg;
 410
 411         switch (key) {
 412         case SR_CONF_DEVICE_OPTIONS:
 413                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 414                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 415                 break;
 416         case SR_CONF_SAMPLERATE:
 417                 devc = sdi->priv;
 418                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 419                 if (devc->prof->max_sampling_freq == 100) {
 420                         gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 421                                         samplerates_100, ARRAY_SIZE(samplerates_100),
 422                                         sizeof(uint64_t));
 423                 } else if (devc->prof->max_sampling_freq == 200) {
 424                         gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 425                                         samplerates_200, ARRAY_SIZE(samplerates_200),
 426                                         sizeof(uint64_t));
 427                 } else {
 428                         sr_err("Internal error: Unknown max. samplerate: %d.",
 429                                devc->prof->max_sampling_freq);
 430                         return SR_ERR_ARG;
 431                 }
 432                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 433                 *data = g_variant_builder_end(&gvb);
 434                 break;
 435         case SR_CONF_TRIGGER_MATCH:
 436                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 437                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 438                                 sizeof(int32_t));
 439                 break;
 440         case SR_CONF_VOLTAGE_THRESHOLD:
 441                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 442                 for (v = -6.0; v <= 6.0; v += 0.1) {
 443                         range[0] = g_variant_new_double(v);
 444                         range[1] = g_variant_new_double(v);
 445                         gvar = g_variant_new_tuple(range, 2);
 446                         g_variant_builder_add_value(&gvb, gvar);
 447                 }
 448                 *data = g_variant_builder_end(&gvb);
 449                 break;
 450         case SR_CONF_LIMIT_SAMPLES:
 451                 if (!sdi)
 452                         return SR_ERR_ARG;
 453                 devc = sdi->priv;
 454                 grange[0] = g_variant_new_uint64(0);
 455                 grange[1] = g_variant_new_uint64(devc->max_sample_depth);
 456                 *data = g_variant_new_tuple(grange, 2);
 457                 break;
 458         default:
 459                 return SR_ERR_NA;
 460         }
 461
 462         return SR_OK;
 463 }
 464
 465 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 466 {
 467         struct dev_context *devc;
 468         struct sr_usb_dev_inst *usb;
 469         struct sr_datafeed_packet packet;
 470         struct sr_datafeed_logic logic;
 471         unsigned int samples_read;
 472         int res;
 473         unsigned int packet_num, n;
 474         unsigned char *buf;
 475         unsigned int status;
 476         unsigned int stop_address;
 477         unsigned int now_address;
 478         unsigned int trigger_address;
 479         unsigned int trigger_offset;
 480         unsigned int triggerbar;
 481         unsigned int ramsize_trigger;
 482         unsigned int memory_size;
 483         unsigned int valid_samples;
 484         unsigned int discard;
 485         int trigger_now;
 486
 487         if (sdi->status != SR_ST_ACTIVE)
 488                 return SR_ERR_DEV_CLOSED;
 489
 490         devc = sdi->priv;
 491
 492         if (analyzer_add_triggers(sdi) != SR_OK) {
 493                 sr_err("Failed to configure triggers.");
 494                 return SR_ERR;
 495         }
 496
 497         usb = sdi->conn;
 498
 499         set_triggerbar(devc);
 500
 501         /* Push configured settings to device. */
 502         analyzer_configure(usb->devhdl);
 503
 504         analyzer_start(usb->devhdl);
 505         sr_info("Waiting for data.");
 506         analyzer_wait_data(usb->devhdl);
 507
 508         status = analyzer_read_status(usb->devhdl);
 509         stop_address = analyzer_get_stop_address(usb->devhdl);
 510         now_address = analyzer_get_now_address(usb->devhdl);
 511         trigger_address = analyzer_get_trigger_address(usb->devhdl);
 512
 513         triggerbar = analyzer_get_triggerbar_address();
 514         ramsize_trigger = analyzer_get_ramsize_trigger_address();
 515
 516         n = get_memory_size(devc->memory_size);
 517         memory_size = n / 4;
 518
 519         sr_info("Status = 0x%x.", status);
 520         sr_info("Stop address       = 0x%x.", stop_address);
 521         sr_info("Now address        = 0x%x.", now_address);
 522         sr_info("Trigger address    = 0x%x.", trigger_address);
 523         sr_info("Triggerbar address = 0x%x.", triggerbar);
 524         sr_info("Ramsize trigger    = 0x%x.", ramsize_trigger);
 525         sr_info("Memory size        = 0x%x.", memory_size);
 526
 527         std_session_send_df_header(sdi, LOG_PREFIX);
 528
 529         /* Check for empty capture */
 530         if ((status & STATUS_READY) && !stop_address) {
 531                 std_session_send_df_end(sdi, LOG_PREFIX);
 532                 return SR_OK;
 533         }
 534
 535         buf = g_malloc(PACKET_SIZE);
 536
 537         /* Check if the trigger is in the samples we are throwing away */
 538         trigger_now = now_address == trigger_address ||
 539                 ((now_address + 1) % memory_size) == trigger_address;
 540
 541         /*
 542          * STATUS_READY doesn't clear until now_address advances past
 543          * addr 0, but for our logic, clear it in that case
 544          */
 545         if (!now_address)
 546                 status &= ~STATUS_READY;
 547
 548         analyzer_read_start(usb->devhdl);
 549
 550         /* Calculate how much data to discard */
 551         discard = 0;
 552         if (status & STATUS_READY) {
 553                 /*
 554                  * We haven't wrapped around, we need to throw away data from
 555                  * our current position to the end of the buffer.
 556                  * Additionally, the first two samples captured are always
 557                  * bogus.
 558                  */
 559                 discard += memory_size - now_address + 2;
 560                 now_address = 2;
 561         }
 562
 563         /* If we have more samples than we need, discard them */
 564         valid_samples = (stop_address - now_address) % memory_size;
 565         if (valid_samples > ramsize_trigger + triggerbar) {
 566                 discard += valid_samples - (ramsize_trigger + triggerbar);
 567                 now_address += valid_samples - (ramsize_trigger + triggerbar);
 568         }
 569
 570         sr_info("Need to discard %d samples.", discard);
 571
 572         /* Calculate how far in the trigger is */
 573         if (trigger_now)
 574                 trigger_offset = 0;
 575         else
 576                 trigger_offset = (trigger_address - now_address) % memory_size;
 577
 578         /* Recalculate the number of samples available */
 579         valid_samples = (stop_address - now_address) % memory_size;
 580
 581         /* Send the incoming transfer to the session bus. */
 582         samples_read = 0;
 583         for (packet_num = 0; packet_num < n / PACKET_SIZE; packet_num++) {
 584                 unsigned int len;
 585                 unsigned int buf_offset;
 586
 587                 res = analyzer_read_data(usb->devhdl, buf, PACKET_SIZE);
 588                 sr_info("Tried to read %d bytes, actually read %d bytes.",
 589                         PACKET_SIZE, res);
 590
 591                 if (discard >= PACKET_SIZE / 4) {
 592                         discard -= PACKET_SIZE / 4;
 593                         continue;
 594                 }
 595
 596                 len = PACKET_SIZE - discard * 4;
 597                 buf_offset = discard * 4;
 598                 discard = 0;
 599
 600                 /* Check if we've read all the samples */
 601                 if (samples_read + len / 4 >= valid_samples)
 602                         len = (valid_samples - samples_read) * 4;
 603                 if (!len)
 604                         break;
 605
 606                 if (samples_read < trigger_offset &&
 607                     samples_read + len / 4 > trigger_offset) {
 608                         /* Send out samples remaining before trigger */
 609                         packet.type = SR_DF_LOGIC;
 610                         packet.payload = &logic;
 611                         logic.length = (trigger_offset - samples_read) * 4;
 612                         logic.unitsize = 4;
 613                         logic.data = buf + buf_offset;
 614                         sr_session_send(sdi, &packet);
 615                         len -= logic.length;
 616                         samples_read += logic.length / 4;
 617                         buf_offset += logic.length;
 618                 }
 619
 620                 if (samples_read == trigger_offset) {
 621                         /* Send out trigger */
 622                         packet.type = SR_DF_TRIGGER;
 623                         packet.payload = NULL;
 624                         sr_session_send(sdi, &packet);
 625                 }
 626
 627                 /* Send out data (or data after trigger) */
 628                 packet.type = SR_DF_LOGIC;
 629                 packet.payload = &logic;
 630                 logic.length = len;
 631                 logic.unitsize = 4;
 632                 logic.data = buf + buf_offset;
 633                 sr_session_send(sdi, &packet);
 634                 samples_read += len / 4;
 635         }
 636         analyzer_read_stop(usb->devhdl);
 637         g_free(buf);
 638
 639         std_session_send_df_end(sdi, LOG_PREFIX);
 640
 641         return SR_OK;
 642 }
 643
 644 /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
 645 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 646 {
 647         struct sr_usb_dev_inst *usb;
 648
 649         std_session_send_df_end(sdi, LOG_PREFIX);
 650
 651         usb = sdi->conn;
 652         analyzer_reset(usb->devhdl);
 653         /* TODO: Need to cancel and free any queued up transfers. */
 654
 655         return SR_OK;
 656 }
 657
 658 SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info = {
 659         .name = "zeroplus-logic-cube",
 660         .longname = "ZEROPLUS Logic Cube LAP-C series",
 661         .api_version = 1,
 662         .init = std_init,
 663         .cleanup = std_cleanup,
 664         .scan = scan,
 665         .dev_list = std_dev_list,
 666         .dev_clear = NULL,
 667         .config_get = config_get,
 668         .config_set = config_set,
 669         .config_list = config_list,
 670         .dev_open = dev_open,
 671         .dev_close = dev_close,
 672         .dev_acquisition_start = dev_acquisition_start,
 673         .dev_acquisition_stop = dev_acquisition_stop,
 674         .context = NULL,
 675 };