src/hardware/hantek-dso/protocol.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
   5  * With protocol information from the hantekdso project,
   6  * Copyright (C) 2008 Oleg Khudyakov <prcoder@gmail.com>
   7  *
   8  * This program is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include <config.h>
  23 #include <string.h>
  24 #include <glib.h>
  25 #include <libusb.h>
  26 #include <libsigrok/libsigrok.h>
  27 #include "libsigrok-internal.h"
  28 #include "protocol.h"
  29
  30 static int send_begin(const struct sr_dev_inst *sdi)
  31 {
  32         struct sr_usb_dev_inst *usb;
  33         int ret;
  34         unsigned char buffer[] = {0x0f, 0x03, 0x03, 0x03, 0x68, 0xac, 0xfe,
  35         0x00, 0x01, 0x00};
  36
  37         sr_dbg("Sending CTRL_BEGINCOMMAND.");
  38
  39         usb = sdi->conn;
  40         if ((ret = libusb_control_transfer(usb->devhdl,
  41                         LIBUSB_REQUEST_TYPE_VENDOR, CTRL_BEGINCOMMAND,
  42                         0, 0, buffer, sizeof(buffer), 200)) != sizeof(buffer)) {
  43                 sr_err("Failed to send begincommand: %s.",
  44                        libusb_error_name(ret));
  45                 return SR_ERR;
  46         }
  47
  48         return SR_OK;
  49 }
  50
  51 static int send_bulkcmd(const struct sr_dev_inst *sdi, uint8_t *cmdstring, int cmdlen)
  52 {
  53         struct sr_usb_dev_inst *usb;
  54         int ret, tmp;
  55
  56         usb = sdi->conn;
  57
  58         if (send_begin(sdi) != SR_OK)
  59                 return SR_ERR;
  60
  61         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT, cmdstring,
  62                         cmdlen, &tmp, 200)) != 0)
  63                 return SR_ERR;
  64
  65         return SR_OK;
  66 }
  67
  68 static int dso_getmps(libusb_device *dev)
  69 {
  70         struct libusb_device_descriptor des;
  71         struct libusb_config_descriptor *conf_dsc;
  72         const struct libusb_interface_descriptor *intf_dsc;
  73         int mps;
  74
  75         libusb_get_device_descriptor(dev, &des);
  76
  77         if (des.bNumConfigurations != 1)
  78                 return 0;
  79
  80         if (libusb_get_config_descriptor(dev, 0, &conf_dsc) != 0)
  81                 return 0;
  82
  83         mps = 0;
  84         intf_dsc = &(conf_dsc->interface[0].altsetting[0]);
  85         if (intf_dsc->bNumEndpoints != 2)
  86                 goto err;
  87
  88         if ((intf_dsc->endpoint[0].bEndpointAddress & 0x8f) !=
  89             (2 | LIBUSB_ENDPOINT_OUT))
  90                 /* The first endpoint should be 2 (outbound). */
  91                 goto err;
  92
  93         if ((intf_dsc->endpoint[1].bEndpointAddress & 0x8f) !=
  94             (6 | LIBUSB_ENDPOINT_IN))
  95                 /* The second endpoint should be 6 (inbound). */
  96                 goto err;
  97
  98         mps = intf_dsc->endpoint[1].wMaxPacketSize;
  99
 100 err:
 101         if (conf_dsc)
 102                 libusb_free_config_descriptor(conf_dsc);
 103
 104         return mps;
 105 }
 106
 107 SR_PRIV int dso_open(struct sr_dev_inst *sdi)
 108 {
 109         struct dev_context *devc;
 110         struct drv_context *drvc = sdi->driver->context;
 111         struct sr_usb_dev_inst *usb;
 112         struct libusb_device_descriptor des;
 113         libusb_device **devlist;
 114         int err, i;
 115         char connection_id[64];
 116
 117         devc = sdi->priv;
 118         usb = sdi->conn;
 119
 120         libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
 121         for (i = 0; devlist[i]; i++) {
 122                 libusb_get_device_descriptor(devlist[i], &des);
 123
 124                 if (des.idVendor != devc->profile->fw_vid
 125                     || des.idProduct != devc->profile->fw_pid)
 126                         continue;
 127
 128                 if ((sdi->status == SR_ST_INITIALIZING) ||
 129                                 (sdi->status == SR_ST_INACTIVE)) {
 130                         /*
 131                          * Check device by its physical USB bus/port address.
 132                          */
 133                         usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
 134                         if (strcmp(sdi->connection_id, connection_id))
 135                                 /* This is not the one. */
 136                                 continue;
 137                 }
 138
 139                 if (!(err = libusb_open(devlist[i], &usb->devhdl))) {
 140                         if (usb->address == 0xff)
 141                                 /*
 142                                  * first time we touch this device after firmware upload,
 143                                  * so we don't know the address yet.
 144                                  */
 145                                 usb->address = libusb_get_device_address(devlist[i]);
 146
 147                         if (!(devc->epin_maxpacketsize = dso_getmps(devlist[i])))
 148                                 sr_err("Wrong endpoint profile.");
 149                         else {
 150                                 sdi->status = SR_ST_ACTIVE;
 151                                 sr_info("Opened device on %d.%d (logical) / "
 152                                                 "%s (physical) interface %d.",
 153                                         usb->bus, usb->address,
 154                                         sdi->connection_id, USB_INTERFACE);
 155                         }
 156                 } else {
 157                         sr_err("Failed to open device: %s.",
 158                                libusb_error_name(err));
 159                 }
 160
 161                 /* If we made it here, we handled the device (somehow). */
 162                 break;
 163         }
 164         libusb_free_device_list(devlist, 1);
 165
 166         if (sdi->status != SR_ST_ACTIVE)
 167                 return SR_ERR;
 168
 169         return SR_OK;
 170 }
 171
 172 SR_PRIV void dso_close(struct sr_dev_inst *sdi)
 173 {
 174         struct sr_usb_dev_inst *usb;
 175
 176         usb = sdi->conn;
 177
 178         if (!usb->devhdl)
 179                 return;
 180
 181         sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 182                         usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 183         libusb_release_interface(usb->devhdl, USB_INTERFACE);
 184         libusb_close(usb->devhdl);
 185         usb->devhdl = NULL;
 186         sdi->status = SR_ST_INACTIVE;
 187
 188 }
 189
 190 static int get_channel_offsets(const struct sr_dev_inst *sdi)
 191 {
 192         struct dev_context *devc;
 193         struct sr_usb_dev_inst *usb;
 194         GString *gs;
 195         int chan, v, ret;
 196
 197         sr_dbg("Getting channel offsets.");
 198
 199         devc = sdi->priv;
 200         usb = sdi->conn;
 201
 202         ret = libusb_control_transfer(usb->devhdl,
 203                         LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR,
 204                         CTRL_READ_EEPROM, EEPROM_CHANNEL_OFFSETS, 0,
 205                         (unsigned char *)&devc->channel_levels,
 206                         sizeof(devc->channel_levels), 200);
 207         if (ret != sizeof(devc->channel_levels)) {
 208                 sr_err("Failed to get channel offsets: %s.",
 209                        libusb_error_name(ret));
 210                 return SR_ERR;
 211         }
 212
 213         /* Comes in as 16-bit numbers with the second byte always 0 on
 214          * the DSO-2090. Guessing this is supposed to be big-endian,
 215          * since that's how voltage offsets are submitted back to the DSO.
 216          * Convert to host order now, so we can use them natively.
 217          */
 218         for (chan = 0; chan < NUM_CHANNELS; chan++) {
 219                 for (v = 0; v < 9; v++) {
 220                         devc->channel_levels[chan][v][0] =
 221                                 g_ntohs(devc->channel_levels[chan][v][0]);
 222                         devc->channel_levels[chan][v][1] =
 223                                 g_ntohs(devc->channel_levels[chan][v][1]);
 224                 }
 225         }
 226
 227         if (sr_log_loglevel_get() >= SR_LOG_DBG) {
 228                 gs = g_string_sized_new(128);
 229                 for (chan = 0; chan < NUM_CHANNELS; chan++) {
 230                         g_string_printf(gs, "CH%d:", chan + 1);
 231                         for (v = 0; v < 9; v++) {
 232                                 g_string_append_printf(gs, " %.4x-%.4x",
 233                                         devc->channel_levels[chan][v][0],
 234                                         devc->channel_levels[chan][v][1]);
 235                         }
 236                         sr_dbg("%s", gs->str);
 237                 }
 238                 g_string_free(gs, TRUE);
 239         }
 240
 241         return SR_OK;
 242 }
 243
 244
 245 static void dso2250_set_triggerpos(int value, int long_buffer, uint8_t dest[], int offset)
 246 {
 247         uint32_t min, max;
 248         uint32_t tmp, diff;
 249
 250         min = long_buffer ? 0 : 0x7d7ff;
 251         max = 0x7ffff;
 252
 253         diff = max - min;
 254         tmp = min + diff * value / 100;
 255         sr_dbg("2250 trigger pos: %3d%% * [0x%x,0x%x] == 0x%x", value, min, max, tmp);
 256
 257         dest[offset + 0] = tmp & 0xff;
 258         dest[offset + 1] = (tmp >> 8) & 0xff;
 259         dest[offset + 2] = (tmp >> 16) & 0x7;
 260 }
 261
 262
 263 /* See http://openhantek.sourceforge.net/doc/namespaceHantek.html#ac1cd181814cf3da74771c29800b39028 */
 264 static int dso2250_set_trigger_samplerate(const struct sr_dev_inst *sdi)
 265 {
 266         struct dev_context *devc;
 267         struct sr_usb_dev_inst *usb;
 268         int ret, tmp;
 269         int base;
 270         uint8_t cmdstring[12];
 271         int trig;
 272
 273
 274         devc = sdi->priv;
 275         usb = sdi->conn;
 276
 277         memset(cmdstring, 0, sizeof(cmdstring));
 278         /* Command */
 279         cmdstring[0] = CMD_2250_SET_TRIGGERSOURCE;
 280         sr_dbg("Trigger source %s.", devc->triggersource);
 281         if (!strcmp("CH2", devc->triggersource))
 282                 tmp = 3;
 283         else if (!strcmp("CH1", devc->triggersource))
 284                 tmp = 2;
 285         else if (!strcmp("EXT", devc->triggersource))
 286                 tmp = 0;
 287         else {
 288                 sr_err("Invalid trigger source: '%s'.", devc->triggersource);
 289                 return SR_ERR_ARG;
 290         }
 291         cmdstring[2] = tmp;
 292
 293
 294         sr_dbg("Trigger slope: %d.", devc->triggerslope);
 295         cmdstring[2] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
 296
 297         if (send_begin(sdi) != SR_OK)
 298                 return SR_ERR;
 299
 300         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
 301                         cmdstring, 8, &tmp, 100)) != 0) {
 302                 sr_err("Failed to set trigger/samplerate: %s.",
 303                        libusb_error_name(ret));
 304                 return SR_ERR;
 305         }
 306
 307
 308         /* Frame size */
 309         sr_dbg("Frame size: %d.", devc->framesize);
 310         cmdstring[0] = CMD_2250_SET_RECORD_LENGTH;
 311         cmdstring[2] = devc->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02;
 312
 313         if (send_begin(sdi) != SR_OK)
 314                 return SR_ERR;
 315
 316         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
 317                         cmdstring, 4, &tmp, 100)) != 0) {
 318                 sr_err("Failed to set record length: %s.",
 319                        libusb_error_name(ret));
 320                 return SR_ERR;
 321         }
 322
 323
 324         memset(cmdstring, 0, sizeof(cmdstring));
 325         cmdstring[0] = CMD_2250_SET_SAMPLERATE;
 326         sr_dbg("Sample rate: %u", devc->samplerate);
 327         base = 100e6;
 328         if (devc->samplerate > base) {
 329                 /* Timebase fast */
 330                 sr_err("Sample rate > 100MHz not yet supported.");
 331                 return SR_ERR_ARG;
 332         }
 333
 334         tmp = base / devc->samplerate;
 335         sr_dbg("sample rate value: %d.", devc->samplerate);
 336         if (tmp) {
 337                 /* Downsampling on */
 338                 cmdstring[2] |= 2;
 339                 /* Downsampler = 1comp((Base / Samplerate) - 2)
 340                  *  Base == 100Msa resp. 200MSa
 341                  *
 342                  * Example for 500kSa/s:
 343                  *  100e6 / 500e3 => 200
 344                  *  200 - 2 => 198
 345                  *  1comp(198) => ff39 */
 346                 tmp -= 2;
 347                 tmp = ~tmp;
 348                 sr_dbg("down sampler value: 0x%x.", tmp & 0xffff);
 349                 cmdstring[4] = (tmp >> 0) & 0xff;
 350                 cmdstring[5] = (tmp >> 8) & 0xff;
 351         }
 352
 353         if (send_begin(sdi) != SR_OK)
 354                 return SR_ERR;
 355
 356         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
 357                         cmdstring, 8, &tmp, 100)) != 0) {
 358                 sr_err("Failed to set sample rate: %s.",
 359                        libusb_error_name(ret));
 360                 return SR_ERR;
 361         }
 362         sr_dbg("Sent CMD_2250_SET_SAMPLERATE.");
 363
 364
 365         /* Enabled channels: 00=CH1 01=CH2 10=both */
 366         memset(cmdstring, 0, sizeof(cmdstring));
 367         cmdstring[0] = CMD_2250_SET_CHANNELS;
 368         sr_dbg("Channels CH1=%d CH2=%d", devc->ch_enabled[0], devc->ch_enabled[1]);
 369         cmdstring[2] = (devc->ch_enabled[0] ? 0 : 1) + (devc->ch_enabled[1] ? 2 : 0);
 370
 371         if (send_begin(sdi) != SR_OK)
 372                 return SR_ERR;
 373
 374         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
 375                         cmdstring, 4, &tmp, 100)) != 0) {
 376                 sr_err("Failed to set channels: %s.",
 377                        libusb_error_name(ret));
 378                 return SR_ERR;
 379         }
 380         sr_dbg("Sent CMD_2250_SET_CHANNELS.");
 381
 382
 383
 384         /* Trigger slope: 0=positive 1=negative */
 385         memset(cmdstring, 0, sizeof(cmdstring));
 386         cmdstring[0] = CMD_2250_SET_TRIGGERPOS_AND_BUFFER;
 387
 388         sr_dbg("Capture ratio: %d.", devc->capture_ratio);
 389         trig = devc->capture_ratio;
 390         dso2250_set_triggerpos(trig,
 391                         devc->framesize != FRAMESIZE_SMALL, cmdstring, 2);
 392         dso2250_set_triggerpos(100 - trig,
 393                         devc->framesize != FRAMESIZE_SMALL, cmdstring, 6);
 394
 395         if (send_begin(sdi) != SR_OK)
 396                 return SR_ERR;
 397
 398         /* TODO: 12 bytes according to documentation? */
 399         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
 400                         cmdstring, 10, &tmp, 100)) != 0) {
 401                 sr_err("Failed to set trigger position: %s.",
 402                        libusb_error_name(ret));
 403                 return SR_ERR;
 404         }
 405
 406         return SR_OK;
 407 }
 408
 409 int dso_set_trigger_samplerate(const struct sr_dev_inst *sdi)
 410 {
 411         struct dev_context *devc;
 412         struct sr_usb_dev_inst *usb;
 413         int ret, tmp;
 414         uint8_t cmdstring[12];
 415         uint16_t timebase_small[] = { 0xffff, 0xfffc, 0xfff7, 0xffe8, 0xffce,
 416                 0xff9c, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79, 0xd8f1 };
 417         uint16_t timebase_large[] = { 0xffff, 0x0000, 0xfffc, 0xfff7, 0xffe8,
 418                 0xffce, 0xff9d, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79 };
 419
 420         devc = sdi->priv;
 421         if (devc->profile->fw_pid == 0x2250)
 422                 return dso2250_set_trigger_samplerate(sdi);
 423
 424         sr_dbg("Preparing CMD_SET_TRIGGER_SAMPLERATE.");
 425
 426         usb = sdi->conn;
 427
 428         memset(cmdstring, 0, sizeof(cmdstring));
 429         /* Command */
 430         cmdstring[0] = CMD_SET_TRIGGER_SAMPLERATE;
 431
 432         /* Trigger source */
 433         sr_dbg("Trigger source %s.", devc->triggersource);
 434         if (!strcmp("CH2", devc->triggersource))
 435                 tmp = 0;
 436         else if (!strcmp("CH1", devc->triggersource))
 437                 tmp = 1;
 438         else if (!strcmp("EXT", devc->triggersource))
 439                 tmp = 2;
 440         else {
 441                 sr_err("Invalid trigger source: '%s'.", devc->triggersource);
 442                 return SR_ERR_ARG;
 443         }
 444         cmdstring[2] = tmp;
 445
 446         /* Frame size */
 447         sr_dbg("Frame size: %d.", devc->framesize);
 448         cmdstring[2] |= (devc->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02) << 2;
 449
 450         /* Timebase fast */
 451         sr_dbg("Time base index: %d.", devc->timebase);
 452         if (devc->framesize == FRAMESIZE_SMALL) {
 453                 if (devc->timebase < TIME_20us)
 454                         tmp = 0;
 455                 else if (devc->timebase == TIME_20us)
 456                         tmp = 1;
 457                 else if (devc->timebase == TIME_40us)
 458                         tmp = 2;
 459                 else if (devc->timebase == TIME_100us)
 460                         tmp = 3;
 461                 else if (devc->timebase >= TIME_200us)
 462                         tmp = 4;
 463         } else {
 464                 if (devc->timebase < TIME_40us) {
 465                         sr_err("Timebase < 40us only supported with 10K buffer.");
 466                         return SR_ERR_ARG;
 467                 }
 468                 else if (devc->timebase == TIME_40us)
 469                         tmp = 0;
 470                 else if (devc->timebase == TIME_100us)
 471                         tmp = 2;
 472                 else if (devc->timebase == TIME_200us)
 473                         tmp = 3;
 474                 else if (devc->timebase >= TIME_400us)
 475                         tmp = 4;
 476         }
 477         cmdstring[2] |= (tmp & 0x07) << 5;
 478
 479         /* Enabled channels: 00=CH1 01=CH2 10=both */
 480         sr_dbg("Channels CH1=%d CH2=%d", devc->ch_enabled[0], devc->ch_enabled[1]);
 481         tmp = (((devc->ch_enabled[1] ? 1 : 0) << 1) + (devc->ch_enabled[0] ? 1 : 0)) - 1;
 482         cmdstring[3] = tmp;
 483
 484         /* Fast rates channel */
 485         /* TODO: Is this right? */
 486         tmp = devc->timebase < TIME_10us ? 1 : 0;
 487         cmdstring[3] |= tmp << 2;
 488
 489         /* Trigger slope: 0=positive 1=negative */
 490         /* TODO: Does this work? */
 491         sr_dbg("Trigger slope: %d.", devc->triggerslope);
 492         cmdstring[3] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
 493
 494         /* Timebase slow */
 495         if (devc->timebase < TIME_100us)
 496                 tmp = 0;
 497         else if (devc->timebase > TIME_400ms)
 498                 tmp = 0xffed;
 499         else {
 500                 if (devc->framesize == FRAMESIZE_SMALL)
 501                         tmp = timebase_small[devc->timebase - 3];
 502                 else
 503                         tmp = timebase_large[devc->timebase - 3];
 504         }
 505         cmdstring[4] = tmp & 0xff;
 506         cmdstring[5] = (tmp >> 8) & 0xff;
 507
 508         /* Horizontal trigger position */
 509         sr_dbg("Capture ratio: %d.", devc->capture_ratio);
 510         tmp = 0x77fff + 0x8000 * devc->capture_ratio / 100;
 511         cmdstring[6] = tmp & 0xff;
 512         cmdstring[7] = (tmp >> 8) & 0xff;
 513         cmdstring[10] = (tmp >> 16) & 0xff;
 514
 515         if (send_begin(sdi) != SR_OK)
 516                 return SR_ERR;
 517
 518         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
 519                         cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
 520                 sr_err("Failed to set trigger/samplerate: %s.",
 521                        libusb_error_name(ret));
 522                 return SR_ERR;
 523         }
 524         sr_dbg("Sent CMD_SET_TRIGGER_SAMPLERATE.");
 525
 526         return SR_OK;
 527 }
 528
 529
 530 static int dso_set_filters(const struct sr_dev_inst *sdi)
 531 {
 532         struct dev_context *devc;
 533         struct sr_usb_dev_inst *usb;
 534         int ret, tmp;
 535         uint8_t cmdstring[8];
 536
 537         sr_dbg("Preparing CMD_SET_FILTERS.");
 538
 539         devc = sdi->priv;
 540         usb = sdi->conn;
 541
 542         memset(cmdstring, 0, sizeof(cmdstring));
 543         cmdstring[0] = CMD_SET_FILTERS;
 544         cmdstring[1] = 0x0f;
 545         if (devc->filter[0]) {
 546                 sr_dbg("Turning on CH1 filter.");
 547                 cmdstring[2] |= 0x80;
 548         }
 549         if (devc->filter[1]) {
 550                 sr_dbg("Turning on CH2 filter.");
 551                 cmdstring[2] |= 0x40;
 552         }
 553         /*
 554          * Not supported: filtering on the trigger
 555          * cmdstring[2] |= 0x20;
 556          */
 557
 558         if (send_begin(sdi) != SR_OK)
 559                 return SR_ERR;
 560
 561         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
 562                         cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
 563                 sr_err("Failed to set filters: %s.", libusb_error_name(ret));
 564                 return SR_ERR;
 565         }
 566         sr_dbg("Sent CMD_SET_FILTERS.");
 567
 568         return SR_OK;
 569 }
 570
 571 static int dso_set_voltage(const struct sr_dev_inst *sdi)
 572 {
 573         struct dev_context *devc;
 574         struct sr_usb_dev_inst *usb;
 575         int ret, tmp;
 576         uint8_t cmdstring[8];
 577
 578         sr_dbg("Preparing CMD_SET_VOLTAGE.");
 579
 580         devc = sdi->priv;
 581         usb = sdi->conn;
 582
 583         memset(cmdstring, 0, sizeof(cmdstring));
 584         cmdstring[0] = CMD_SET_VOLTAGE;
 585
 586         if (devc->profile->fw_pid == 0x2250) {
 587                 cmdstring[2] = 0x08;
 588         } else {
 589                 cmdstring[1] = 0x0f;
 590                 cmdstring[2] = 0x30;
 591         }
 592
 593         /* CH1 volts/div is encoded in bits 0-1 */
 594         sr_dbg("CH1 vdiv index: %d.", devc->voltage[0]);
 595         switch (devc->voltage[0]) {
 596         case VDIV_1V:
 597         case VDIV_100MV:
 598         case VDIV_10MV:
 599                 cmdstring[2] |= 0x00;
 600                 break;
 601         case VDIV_2V:
 602         case VDIV_200MV:
 603         case VDIV_20MV:
 604                 cmdstring[2] |= 0x01;
 605                 break;
 606         case VDIV_5V:
 607         case VDIV_500MV:
 608         case VDIV_50MV:
 609                 cmdstring[2] |= 0x02;
 610                 break;
 611         }
 612
 613         /* CH2 volts/div is encoded in bits 2-3 */
 614         sr_dbg("CH2 vdiv index: %d.", devc->voltage[1]);
 615         switch (devc->voltage[1]) {
 616         case VDIV_1V:
 617         case VDIV_100MV:
 618         case VDIV_10MV:
 619                 cmdstring[2] |= 0x00;
 620                 break;
 621         case VDIV_2V:
 622         case VDIV_200MV:
 623         case VDIV_20MV:
 624                 cmdstring[2] |= 0x04;
 625                 break;
 626         case VDIV_5V:
 627         case VDIV_500MV:
 628         case VDIV_50MV:
 629                 cmdstring[2] |= 0x08;
 630                 break;
 631         }
 632
 633         if (send_begin(sdi) != SR_OK)
 634                 return SR_ERR;
 635
 636         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
 637                         cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
 638                 sr_err("Failed to set voltage: %s.", libusb_error_name(ret));
 639                 return SR_ERR;
 640         }
 641         sr_dbg("Sent CMD_SET_VOLTAGE.");
 642
 643         return SR_OK;
 644 }
 645
 646 static int dso_set_relays(const struct sr_dev_inst *sdi)
 647 {
 648         struct dev_context *devc;
 649         struct sr_usb_dev_inst *usb;
 650         GString *gs;
 651         int ret, i;
 652         uint8_t relays[17] = { 0x00, 0x04, 0x08, 0x02, 0x20, 0x40, 0x10, 0x01,
 653                         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 654
 655         sr_dbg("Preparing CTRL_SETRELAYS.");
 656
 657         devc = sdi->priv;
 658         usb = sdi->conn;
 659
 660         if (devc->voltage[0] < VDIV_1V)
 661                 relays[1] = ~relays[1];
 662
 663         if (devc->voltage[0] < VDIV_100MV)
 664                 relays[2] = ~relays[2];
 665
 666         sr_dbg("CH1 coupling: %d.", devc->coupling[0]);
 667         if (devc->coupling[0] != COUPLING_AC)
 668                 relays[3] = ~relays[3];
 669
 670         if (devc->voltage[1] < VDIV_1V)
 671                 relays[4] = ~relays[4];
 672
 673         if (devc->voltage[1] < VDIV_100MV)
 674                 relays[5] = ~relays[5];
 675
 676         sr_dbg("CH2 coupling: %d.", devc->coupling[1]);
 677         if (devc->coupling[1] != COUPLING_AC)
 678                 relays[6] = ~relays[6];
 679
 680         if (!strcmp(devc->triggersource, "EXT"))
 681                 relays[7] = ~relays[7];
 682
 683         if (sr_log_loglevel_get() >= SR_LOG_DBG) {
 684                 gs = g_string_sized_new(128);
 685                 g_string_printf(gs, "Relays:");
 686                 for (i = 0; i < 17; i++)
 687                         g_string_append_printf(gs, " %.2x", relays[i]);
 688                 sr_dbg("%s", gs->str);
 689                 g_string_free(gs, TRUE);
 690         }
 691
 692         if ((ret = libusb_control_transfer(usb->devhdl,
 693                         LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETRELAYS,
 694                         0, 0, relays, 17, 100)) != sizeof(relays)) {
 695                 sr_err("Failed to set relays: %s.", libusb_error_name(ret));
 696                 return SR_ERR;
 697         }
 698         sr_dbg("Sent CTRL_SETRELAYS.");
 699
 700         return SR_OK;
 701 }
 702
 703 int dso_set_voffsets(const struct sr_dev_inst *sdi)
 704 {
 705         struct dev_context *devc;
 706         struct sr_usb_dev_inst *usb;
 707         int offset, ret;
 708         uint16_t *ch_levels;
 709         uint8_t offsets[17];
 710
 711         sr_dbg("Preparing CTRL_SETOFFSET.");
 712
 713         devc = sdi->priv;
 714         usb = sdi->conn;
 715
 716         memset(offsets, 0, sizeof(offsets));
 717         /* Channel 1 */
 718         ch_levels = devc->channel_levels[0][devc->voltage[0]];
 719         offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch1 + ch_levels[0];
 720         offsets[0] = (offset >> 8) | 0x20;
 721         offsets[1] = offset & 0xff;
 722         sr_dbg("CH1 offset: %3.2f (%.2x%.2x).", devc->voffset_ch1,
 723                offsets[0], offsets[1]);
 724
 725         /* Channel 2 */
 726         ch_levels = devc->channel_levels[1][devc->voltage[1]];
 727         offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch2 + ch_levels[0];
 728         offsets[2] = (offset >> 8) | 0x20;
 729         offsets[3] = offset & 0xff;
 730         sr_dbg("CH2 offset: %3.2f (%.2x%.2x).", devc->voffset_ch2,
 731                offsets[2], offsets[3]);
 732
 733         /* Trigger */
 734         offset = MAX_VERT_TRIGGER * devc->voffset_trigger;
 735         offsets[4] = (offset >> 8) | 0x20;
 736         offsets[5] = offset & 0xff;
 737         sr_dbg("Trigger offset: %3.2f (%.2x%.2x).", devc->voffset_trigger,
 738                         offsets[4], offsets[5]);
 739
 740         if ((ret = libusb_control_transfer(usb->devhdl,
 741                         LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETOFFSET,
 742                         0, 0, offsets, sizeof(offsets), 100)) != sizeof(offsets)) {
 743                 sr_err("Failed to set offsets: %s.", libusb_error_name(ret));
 744                 return SR_ERR;
 745         }
 746         sr_dbg("Sent CTRL_SETOFFSET.");
 747
 748         return SR_OK;
 749 }
 750
 751 SR_PRIV int dso_enable_trigger(const struct sr_dev_inst *sdi)
 752 {
 753         struct sr_usb_dev_inst *usb;
 754         int ret, tmp;
 755         uint8_t cmdstring[2];
 756
 757         sr_dbg("Sending CMD_ENABLE_TRIGGER.");
 758
 759         usb = sdi->conn;
 760
 761         memset(cmdstring, 0, sizeof(cmdstring));
 762         cmdstring[0] = CMD_ENABLE_TRIGGER;
 763         cmdstring[1] = 0x00;
 764
 765         if (send_begin(sdi) != SR_OK)
 766                 return SR_ERR;
 767
 768         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
 769                         cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
 770                 sr_err("Failed to enable trigger: %s.", libusb_error_name(ret));
 771                 return SR_ERR;
 772         }
 773
 774         return SR_OK;
 775 }
 776
 777 SR_PRIV int dso_force_trigger(const struct sr_dev_inst *sdi)
 778 {
 779         struct sr_usb_dev_inst *usb;
 780         int ret, tmp;
 781         uint8_t cmdstring[2];
 782
 783         sr_dbg("Sending CMD_FORCE_TRIGGER.");
 784
 785         usb = sdi->conn;
 786
 787         memset(cmdstring, 0, sizeof(cmdstring));
 788         cmdstring[0] = CMD_FORCE_TRIGGER;
 789         cmdstring[1] = 0x00;
 790
 791         if (send_begin(sdi) != SR_OK)
 792                 return SR_ERR;
 793
 794         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_OUT,
 795                         cmdstring, sizeof(cmdstring), &tmp, 100)) != 0) {
 796                 sr_err("Failed to force trigger: %s.", libusb_error_name(ret));
 797                 return SR_ERR;
 798         }
 799
 800         return SR_OK;
 801 }
 802
 803 SR_PRIV int dso_init(const struct sr_dev_inst *sdi)
 804 {
 805
 806         sr_dbg("Initializing DSO.");
 807
 808         if (get_channel_offsets(sdi) != SR_OK)
 809                 return SR_ERR;
 810
 811         if (dso_set_trigger_samplerate(sdi) != SR_OK)
 812                 return SR_ERR;
 813
 814         if (dso_set_filters(sdi) != SR_OK)
 815                 return SR_ERR;
 816
 817         if (dso_set_voltage(sdi) != SR_OK)
 818                 return SR_ERR;
 819
 820         if (dso_set_relays(sdi) != SR_OK)
 821                 return SR_ERR;
 822
 823         if (dso_set_voffsets(sdi) != SR_OK)
 824                 return SR_ERR;
 825
 826         if (dso_enable_trigger(sdi) != SR_OK)
 827                 return SR_ERR;
 828
 829         return SR_OK;
 830 }
 831
 832 SR_PRIV int dso_get_capturestate(const struct sr_dev_inst *sdi,
 833                 uint8_t *capturestate, uint32_t *trigger_offset)
 834 {
 835         struct sr_usb_dev_inst *usb;
 836         int ret, tmp, i;
 837         unsigned int bitvalue, toff;
 838         uint8_t cmdstring[2], inbuf[512];
 839
 840         sr_dbg("Sending CMD_GET_CAPTURESTATE.");
 841
 842         usb = sdi->conn;
 843
 844         cmdstring[0] = CMD_GET_CAPTURESTATE;
 845         cmdstring[1] = 0;
 846
 847         if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
 848                 sr_dbg("Failed to send get_capturestate command: %s.",
 849                        libusb_error_name(ret));
 850                 return SR_ERR;
 851         }
 852
 853         if ((ret = libusb_bulk_transfer(usb->devhdl, DSO_EP_IN,
 854                         inbuf, 512, &tmp, 100)) != 0) {
 855                 sr_dbg("Failed to get capturestate: %s.",
 856                        libusb_error_name(ret));
 857                 return SR_ERR;
 858         }
 859         *capturestate = inbuf[0];
 860         toff = (inbuf[1] << 16) | (inbuf[3] << 8) | inbuf[2];
 861
 862         /*
 863          * This conversion comes from the openhantek project.
 864          * Each set bit in the 24-bit value inverts all bits with a lower
 865          * value. No idea why the device reports the trigger point this way.
 866          */
 867         bitvalue = 1;
 868         for (i = 0; i < 24; i++) {
 869                 /* Each set bit inverts all bits with a lower value. */
 870                 if (toff & bitvalue)
 871                         toff ^= bitvalue - 1;
 872                 bitvalue <<= 1;
 873         }
 874         *trigger_offset = toff;
 875
 876         return SR_OK;
 877 }
 878
 879 SR_PRIV int dso_capture_start(const struct sr_dev_inst *sdi)
 880 {
 881         int ret;
 882         uint8_t cmdstring[2];
 883
 884         sr_dbg("Sending CMD_CAPTURE_START.");
 885
 886         cmdstring[0] = CMD_CAPTURE_START;
 887         cmdstring[1] = 0;
 888
 889         if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
 890                 sr_err("Failed to send capture_start command: %s.",
 891                        libusb_error_name(ret));
 892                 return SR_ERR;
 893         }
 894
 895         return SR_OK;
 896 }
 897
 898 SR_PRIV int dso_get_channeldata(const struct sr_dev_inst *sdi,
 899                 libusb_transfer_cb_fn cb)
 900 {
 901         struct dev_context *devc;
 902         struct sr_usb_dev_inst *usb;
 903         struct libusb_transfer *transfer;
 904         int num_transfers, ret, i;
 905         uint8_t cmdstring[2];
 906         unsigned char *buf;
 907
 908         sr_dbg("Sending CMD_GET_CHANNELDATA.");
 909
 910         devc = sdi->priv;
 911         usb = sdi->conn;
 912
 913         cmdstring[0] = CMD_GET_CHANNELDATA;
 914         cmdstring[1] = 0;
 915
 916         if ((ret = send_bulkcmd(sdi, cmdstring, sizeof(cmdstring))) != SR_OK) {
 917                 sr_err("Failed to get channel data: %s.",
 918                        libusb_error_name(ret));
 919                 return SR_ERR;
 920         }
 921
 922         /* TODO: DSO-2xxx only. */
 923         num_transfers = devc->framesize *
 924                         sizeof(unsigned short) / devc->epin_maxpacketsize;
 925         sr_dbg("Queueing up %d transfers.", num_transfers);
 926         for (i = 0; i < num_transfers; i++) {
 927                 if (!(buf = g_try_malloc(devc->epin_maxpacketsize))) {
 928                         sr_err("Failed to malloc USB endpoint buffer.");
 929                         return SR_ERR_MALLOC;
 930                 }
 931                 transfer = libusb_alloc_transfer(0);
 932                 libusb_fill_bulk_transfer(transfer, usb->devhdl, DSO_EP_IN, buf,
 933                                 devc->epin_maxpacketsize, cb, (void *)sdi, 40);
 934                 if ((ret = libusb_submit_transfer(transfer)) != 0) {
 935                         sr_err("Failed to submit transfer: %s.",
 936                                libusb_error_name(ret));
 937                         /* TODO: Free them all. */
 938                         libusb_free_transfer(transfer);
 939                         g_free(buf);
 940                         return SR_ERR;
 941                 }
 942         }
 943
 944         return SR_OK;
 945 }