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->serial_num = g_strdup(serial_num);
 216                 sdi->connection_id = g_strdup(connection_id);
 217
 218                 /* Allocate memory for our private driver context. */
 219                 devc = g_malloc0(sizeof(struct dev_context));
 220                 sdi->priv = devc;
 221                 devc->prof = prof;
 222                 devc->num_channels = prof->channels;
 223 #ifdef ZP_EXPERIMENTAL
 224                 devc->max_sample_depth = 128 * 1024;
 225                 devc->max_samplerate = 200;
 226 #else
 227                 devc->max_sample_depth = prof->sample_depth * 1024;
 228                 devc->max_samplerate = prof->max_sampling_freq;
 229 #endif
 230                 devc->max_samplerate *= SR_MHZ(1);
 231                 devc->memory_size = MEMORY_SIZE_8K;
 232                 // memset(devc->trigger_buffer, 0, NUM_TRIGGER_STAGES);
 233
 234                 /* Fill in channellist according to this device's profile. */
 235                 for (j = 0; j < devc->num_channels; j++)
 236                         sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
 237                                         channel_names[j]);
 238
 239                 devices = g_slist_append(devices, sdi);
 240                 sdi->inst_type = SR_INST_USB;
 241                 sdi->conn = sr_usb_dev_inst_new(
 242                         libusb_get_bus_number(devlist[i]),
 243                         libusb_get_device_address(devlist[i]), NULL);
 244         }
 245         libusb_free_device_list(devlist, 1);
 246
 247         return std_scan_complete(di, devices);
 248 }
 249
 250 static int dev_open(struct sr_dev_inst *sdi)
 251 {
 252         struct sr_dev_driver *di = sdi->driver;
 253         struct dev_context *devc;
 254         struct drv_context *drvc;
 255         struct sr_usb_dev_inst *usb;
 256         int ret;
 257
 258         drvc = di->context;
 259         usb = sdi->conn;
 260         devc = sdi->priv;
 261
 262         ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb);
 263         if (ret != SR_OK)
 264                 return ret;
 265
 266         sdi->status = SR_ST_ACTIVE;
 267
 268         ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION);
 269         if (ret < 0) {
 270                 sr_err("Unable to set USB configuration %d: %s.",
 271                        USB_CONFIGURATION, libusb_error_name(ret));
 272                 return SR_ERR;
 273         }
 274
 275         ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
 276         if (ret != 0) {
 277                 sr_err("Unable to claim interface: %s.",
 278                        libusb_error_name(ret));
 279                 return SR_ERR;
 280         }
 281
 282         /* Set default configuration after power on. */
 283         if (analyzer_read_status(usb->devhdl) == 0)
 284                 analyzer_configure(usb->devhdl);
 285
 286         analyzer_reset(usb->devhdl);
 287         analyzer_initialize(usb->devhdl);
 288
 289         //analyzer_set_memory_size(MEMORY_SIZE_512K);
 290         // analyzer_set_freq(g_freq, g_freq_scale);
 291         analyzer_set_trigger_count(1);
 292         // analyzer_set_ramsize_trigger_address((((100 - g_pre_trigger)
 293         // * get_memory_size(g_memory_size)) / 100) >> 2);
 294
 295 #if 0
 296         if (g_double_mode == 1)
 297                 analyzer_set_compression(COMPRESSION_DOUBLE);
 298         else if (g_compression == 1)
 299                 analyzer_set_compression(COMPRESSION_ENABLE);
 300         else
 301 #endif
 302         analyzer_set_compression(COMPRESSION_NONE);
 303
 304         if (devc->cur_samplerate == 0) {
 305                 /* Samplerate hasn't been set. Default to 1MHz. */
 306                 analyzer_set_freq(1, FREQ_SCALE_MHZ);
 307                 devc->cur_samplerate = SR_MHZ(1);
 308         }
 309
 310         if (devc->cur_threshold == 0)
 311                 set_voltage_threshold(devc, 1.5);
 312
 313         return SR_OK;
 314 }
 315
 316 static int dev_close(struct sr_dev_inst *sdi)
 317 {
 318         struct sr_usb_dev_inst *usb;
 319
 320         usb = sdi->conn;
 321
 322         if (!usb->devhdl)
 323                 return SR_ERR;
 324
 325         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 326                 usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 327         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 328         libusb_reset_device(usb->devhdl);
 329         libusb_close(usb->devhdl);
 330         usb->devhdl = NULL;
 331         sdi->status = SR_ST_INACTIVE;
 332
 333         return SR_OK;
 334 }
 335
 336 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 337                 const struct sr_channel_group *cg)
 338 {
 339         struct dev_context *devc;
 340         GVariant *range[2];
 341
 342         (void)cg;
 343
 344         if (!sdi)
 345                 return SR_ERR_ARG;
 346
 347         devc = sdi->priv;
 348
 349         switch (key) {
 350         case SR_CONF_SAMPLERATE:
 351                 *data = g_variant_new_uint64(devc->cur_samplerate);
 352                 break;
 353         case SR_CONF_CAPTURE_RATIO:
 354                 *data = g_variant_new_uint64(devc->capture_ratio);
 355                 break;
 356         case SR_CONF_VOLTAGE_THRESHOLD:
 357                 range[0] = g_variant_new_double(devc->cur_threshold);
 358                 range[1] = g_variant_new_double(devc->cur_threshold);
 359                 *data = g_variant_new_tuple(range, 2);
 360                 break;
 361         default:
 362                 return SR_ERR_NA;
 363         }
 364
 365         return SR_OK;
 366 }
 367
 368 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 369                 const struct sr_channel_group *cg)
 370 {
 371         struct dev_context *devc;
 372         gdouble low, high;
 373
 374         (void)cg;
 375
 376         if (sdi->status != SR_ST_ACTIVE)
 377                 return SR_ERR_DEV_CLOSED;
 378
 379         devc = sdi->priv;
 380
 381         switch (key) {
 382         case SR_CONF_SAMPLERATE:
 383                 return zp_set_samplerate(devc, g_variant_get_uint64(data));
 384         case SR_CONF_LIMIT_SAMPLES:
 385                 return set_limit_samples(devc, g_variant_get_uint64(data));
 386         case SR_CONF_CAPTURE_RATIO:
 387                 return set_capture_ratio(devc, g_variant_get_uint64(data));
 388         case SR_CONF_VOLTAGE_THRESHOLD:
 389                 g_variant_get(data, "(dd)", &low, &high);
 390                 return set_voltage_threshold(devc, (low + high) / 2.0);
 391         default:
 392                 return SR_ERR_NA;
 393         }
 394
 395         return SR_OK;
 396 }
 397
 398 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 399                 const struct sr_channel_group *cg)
 400 {
 401         struct dev_context *devc;
 402         GVariant *gvar, *grange[2];
 403         GVariantBuilder gvb;
 404         double v;
 405         GVariant *range[2];
 406
 407         (void)cg;
 408
 409         switch (key) {
 410         case SR_CONF_DEVICE_OPTIONS:
 411                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 412                                 devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 413                 break;
 414         case SR_CONF_SAMPLERATE:
 415                 devc = sdi->priv;
 416                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 417                 if (devc->prof->max_sampling_freq == 100) {
 418                         gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 419                                         samplerates_100, ARRAY_SIZE(samplerates_100),
 420                                         sizeof(uint64_t));
 421                 } else if (devc->prof->max_sampling_freq == 200) {
 422                         gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
 423                                         samplerates_200, ARRAY_SIZE(samplerates_200),
 424                                         sizeof(uint64_t));
 425                 } else {
 426                         sr_err("Internal error: Unknown max. samplerate: %d.",
 427                                devc->prof->max_sampling_freq);
 428                         return SR_ERR_ARG;
 429                 }
 430                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 431                 *data = g_variant_builder_end(&gvb);
 432                 break;
 433         case SR_CONF_TRIGGER_MATCH:
 434                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 435                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 436                                 sizeof(int32_t));
 437                 break;
 438         case SR_CONF_VOLTAGE_THRESHOLD:
 439                 g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);
 440                 for (v = -6.0; v <= 6.0; v += 0.1) {
 441                         range[0] = g_variant_new_double(v);
 442                         range[1] = g_variant_new_double(v);
 443                         gvar = g_variant_new_tuple(range, 2);
 444                         g_variant_builder_add_value(&gvb, gvar);
 445                 }
 446                 *data = g_variant_builder_end(&gvb);
 447                 break;
 448         case SR_CONF_LIMIT_SAMPLES:
 449                 if (!sdi)
 450                         return SR_ERR_ARG;
 451                 devc = sdi->priv;
 452                 grange[0] = g_variant_new_uint64(0);
 453                 grange[1] = g_variant_new_uint64(devc->max_sample_depth);
 454                 *data = g_variant_new_tuple(grange, 2);
 455                 break;
 456         default:
 457                 return SR_ERR_NA;
 458         }
 459
 460         return SR_OK;
 461 }
 462
 463 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 464 {
 465         struct dev_context *devc;
 466         struct sr_usb_dev_inst *usb;
 467         struct sr_datafeed_packet packet;
 468         struct sr_datafeed_logic logic;
 469         unsigned int samples_read;
 470         int res;
 471         unsigned int packet_num, n;
 472         unsigned char *buf;
 473         unsigned int status;
 474         unsigned int stop_address;
 475         unsigned int now_address;
 476         unsigned int trigger_address;
 477         unsigned int trigger_offset;
 478         unsigned int triggerbar;
 479         unsigned int ramsize_trigger;
 480         unsigned int memory_size;
 481         unsigned int valid_samples;
 482         unsigned int discard;
 483         int trigger_now;
 484
 485         if (sdi->status != SR_ST_ACTIVE)
 486                 return SR_ERR_DEV_CLOSED;
 487
 488         devc = sdi->priv;
 489
 490         if (analyzer_add_triggers(sdi) != SR_OK) {
 491                 sr_err("Failed to configure triggers.");
 492                 return SR_ERR;
 493         }
 494
 495         usb = sdi->conn;
 496
 497         set_triggerbar(devc);
 498
 499         /* Push configured settings to device. */
 500         analyzer_configure(usb->devhdl);
 501
 502         analyzer_start(usb->devhdl);
 503         sr_info("Waiting for data.");
 504         analyzer_wait_data(usb->devhdl);
 505
 506         status = analyzer_read_status(usb->devhdl);
 507         stop_address = analyzer_get_stop_address(usb->devhdl);
 508         now_address = analyzer_get_now_address(usb->devhdl);
 509         trigger_address = analyzer_get_trigger_address(usb->devhdl);
 510
 511         triggerbar = analyzer_get_triggerbar_address();
 512         ramsize_trigger = analyzer_get_ramsize_trigger_address();
 513
 514         n = get_memory_size(devc->memory_size);
 515         memory_size = n / 4;
 516
 517         sr_info("Status = 0x%x.", status);
 518         sr_info("Stop address       = 0x%x.", stop_address);
 519         sr_info("Now address        = 0x%x.", now_address);
 520         sr_info("Trigger address    = 0x%x.", trigger_address);
 521         sr_info("Triggerbar address = 0x%x.", triggerbar);
 522         sr_info("Ramsize trigger    = 0x%x.", ramsize_trigger);
 523         sr_info("Memory size        = 0x%x.", memory_size);
 524
 525         std_session_send_df_header(sdi, LOG_PREFIX);
 526
 527         /* Check for empty capture */
 528         if ((status & STATUS_READY) && !stop_address) {
 529                 std_session_send_df_end(sdi, LOG_PREFIX);
 530                 return SR_OK;
 531         }
 532
 533         buf = g_malloc(PACKET_SIZE);
 534
 535         /* Check if the trigger is in the samples we are throwing away */
 536         trigger_now = now_address == trigger_address ||
 537                 ((now_address + 1) % memory_size) == trigger_address;
 538
 539         /*
 540          * STATUS_READY doesn't clear until now_address advances past
 541          * addr 0, but for our logic, clear it in that case
 542          */
 543         if (!now_address)
 544                 status &= ~STATUS_READY;
 545
 546         analyzer_read_start(usb->devhdl);
 547
 548         /* Calculate how much data to discard */
 549         discard = 0;
 550         if (status & STATUS_READY) {
 551                 /*
 552                  * We haven't wrapped around, we need to throw away data from
 553                  * our current position to the end of the buffer.
 554                  * Additionally, the first two samples captured are always
 555                  * bogus.
 556                  */
 557                 discard += memory_size - now_address + 2;
 558                 now_address = 2;
 559         }
 560
 561         /* If we have more samples than we need, discard them */
 562         valid_samples = (stop_address - now_address) % memory_size;
 563         if (valid_samples > ramsize_trigger + triggerbar) {
 564                 discard += valid_samples - (ramsize_trigger + triggerbar);
 565                 now_address += valid_samples - (ramsize_trigger + triggerbar);
 566         }
 567
 568         sr_info("Need to discard %d samples.", discard);
 569
 570         /* Calculate how far in the trigger is */
 571         if (trigger_now)
 572                 trigger_offset = 0;
 573         else
 574                 trigger_offset = (trigger_address - now_address) % memory_size;
 575
 576         /* Recalculate the number of samples available */
 577         valid_samples = (stop_address - now_address) % memory_size;
 578
 579         /* Send the incoming transfer to the session bus. */
 580         samples_read = 0;
 581         for (packet_num = 0; packet_num < n / PACKET_SIZE; packet_num++) {
 582                 unsigned int len;
 583                 unsigned int buf_offset;
 584
 585                 res = analyzer_read_data(usb->devhdl, buf, PACKET_SIZE);
 586                 sr_info("Tried to read %d bytes, actually read %d bytes.",
 587                         PACKET_SIZE, res);
 588
 589                 if (discard >= PACKET_SIZE / 4) {
 590                         discard -= PACKET_SIZE / 4;
 591                         continue;
 592                 }
 593
 594                 len = PACKET_SIZE - discard * 4;
 595                 buf_offset = discard * 4;
 596                 discard = 0;
 597
 598                 /* Check if we've read all the samples */
 599                 if (samples_read + len / 4 >= valid_samples)
 600                         len = (valid_samples - samples_read) * 4;
 601                 if (!len)
 602                         break;
 603
 604                 if (samples_read < trigger_offset &&
 605                     samples_read + len / 4 > trigger_offset) {
 606                         /* Send out samples remaining before trigger */
 607                         packet.type = SR_DF_LOGIC;
 608                         packet.payload = &logic;
 609                         logic.length = (trigger_offset - samples_read) * 4;
 610                         logic.unitsize = 4;
 611                         logic.data = buf + buf_offset;
 612                         sr_session_send(sdi, &packet);
 613                         len -= logic.length;
 614                         samples_read += logic.length / 4;
 615                         buf_offset += logic.length;
 616                 }
 617
 618                 if (samples_read == trigger_offset) {
 619                         /* Send out trigger */
 620                         packet.type = SR_DF_TRIGGER;
 621                         packet.payload = NULL;
 622                         sr_session_send(sdi, &packet);
 623                 }
 624
 625                 /* Send out data (or data after trigger) */
 626                 packet.type = SR_DF_LOGIC;
 627                 packet.payload = &logic;
 628                 logic.length = len;
 629                 logic.unitsize = 4;
 630                 logic.data = buf + buf_offset;
 631                 sr_session_send(sdi, &packet);
 632                 samples_read += len / 4;
 633         }
 634         analyzer_read_stop(usb->devhdl);
 635         g_free(buf);
 636
 637         std_session_send_df_end(sdi, LOG_PREFIX);
 638
 639         return SR_OK;
 640 }
 641
 642 /* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
 643 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 644 {
 645         struct sr_usb_dev_inst *usb;
 646
 647         std_session_send_df_end(sdi, LOG_PREFIX);
 648
 649         usb = sdi->conn;
 650         analyzer_reset(usb->devhdl);
 651         /* TODO: Need to cancel and free any queued up transfers. */
 652
 653         return SR_OK;
 654 }
 655
 656 static struct sr_dev_driver zeroplus_logic_cube_driver_info = {
 657         .name = "zeroplus-logic-cube",
 658         .longname = "ZEROPLUS Logic Cube LAP-C series",
 659         .api_version = 1,
 660         .init = std_init,
 661         .cleanup = std_cleanup,
 662         .scan = scan,
 663         .dev_list = std_dev_list,
 664         .dev_clear = NULL,
 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         .context = NULL,
 673 };
 674 SR_REGISTER_DEV_DRIVER(zeroplus_logic_cube_driver_info);