hardware/openbench-logic-sniffer/ols.c

   1 /*
   2  * This file is part of the sigrok project.
   3  *
   4  * Copyright (C) 2010 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 <stdio.h>
  21 #include <stdint.h>
  22 #include <stdlib.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <fcntl.h>
  26 #include <unistd.h>
  27 #include <termios.h>
  28 #include <string.h>
  29 #include <sys/time.h>
  30 #include <inttypes.h>
  31 #include <arpa/inet.h>
  32 #include <glib.h>
  33 #include "sigrok.h"
  34
  35 #define NUM_PROBES                              32
  36 #define NUM_TRIGGER_STAGES              4
  37 #define TRIGGER_TYPES                   "01"
  38 #define SERIAL_SPEED                    B115200
  39 /* TODO: SERIAL_ bits, parity, stop bit */
  40 #define CLOCK_RATE                              100000000
  41
  42
  43 /* command opcodes */
  44 #define CMD_RESET                                       0x00
  45 #define CMD_ID                                          0x02
  46 #define CMD_SET_FLAGS                           0x82
  47 #define CMD_SET_DIVIDER                 0x80
  48 #define CMD_RUN                                 0x01
  49 #define CMD_CAPTURE_SIZE                        0x81
  50 #define CMD_SET_TRIGGER_MASK_0          0xc0
  51 #define CMD_SET_TRIGGER_MASK_1          0xc4
  52 #define CMD_SET_TRIGGER_MASK_2          0xc8
  53 #define CMD_SET_TRIGGER_MASK_3          0xcc
  54 #define CMD_SET_TRIGGER_VALUE_0 0xc1
  55 #define CMD_SET_TRIGGER_VALUE_1 0xc5
  56 #define CMD_SET_TRIGGER_VALUE_2 0xc9
  57 #define CMD_SET_TRIGGER_VALUE_3 0xcd
  58 #define CMD_SET_TRIGGER_CONFIG_0        0xc2
  59 #define CMD_SET_TRIGGER_CONFIG_1        0xc6
  60 #define CMD_SET_TRIGGER_CONFIG_2        0xca
  61 #define CMD_SET_TRIGGER_CONFIG_3        0xce
  62
  63 /* bitmasks for CMD_FLAGS */
  64 #define FLAG_DEMUX                              0x01
  65 #define FLAG_FILTER                     0x02
  66 #define FLAG_CHANNELGROUP_1     0x04
  67 #define FLAG_CHANNELGROUP_2     0x08
  68 #define FLAG_CHANNELGROUP_3     0x10
  69 #define FLAG_CHANNELGROUP_4     0x20
  70 #define FLAG_CLOCK_EXTERNAL     0x40
  71 #define FLAG_CLOCK_INVERTED     0x80
  72 #define FLAG_RLE                                0x0100
  73
  74
  75 static int capabilities[] = {
  76         HWCAP_LOGIC_ANALYZER,
  77         HWCAP_SAMPLERATE,
  78         HWCAP_CAPTURE_RATIO,
  79         HWCAP_LIMIT_SAMPLES,
  80         0
  81 };
  82
  83 static struct samplerates samplerates = {
  84         10,
  85         MHZ(200),
  86         1,
  87         0
  88 };
  89
  90 /* list of struct serial_device_instance  */
  91 static GSList *device_instances = NULL;
  92
  93 /* current state of the flag register */
  94 static uint32_t flag_reg = 0;
  95
  96 static uint64_t cur_samplerate = 0;
  97 static uint64_t limit_samples = 0;
  98 /* pre/post trigger capture ratio, in percentage. 0 means no pre-trigger data. */
  99 static int capture_ratio = 0;
 100 static uint32_t probe_mask = 0xffffffff, trigger_mask[4] = {0}, trigger_value[4] = {0};
 101
 102
 103
 104 static int send_shortcommand(int fd, uint8_t command)
 105 {
 106         char buf[1];
 107
 108         g_message("ols: sending cmd 0x%.2x", command);
 109         buf[0] = command;
 110         if(write(fd, buf, 1) != 1)
 111                 return SIGROK_ERR;
 112
 113         return SIGROK_OK;
 114 }
 115
 116
 117 static int send_longcommand(int fd, uint8_t command, uint32_t data)
 118 {
 119         char buf[5];
 120
 121         g_message("ols: sending cmd 0x%.2x data 0x%.8x", command, data);
 122         buf[0] = command;
 123         buf[1] = (data & 0xff000000) >> 24;
 124         buf[2] = (data & 0xff0000) >> 16;
 125         buf[3] = (data & 0xff00) >> 8;
 126         buf[4] = data & 0xff;
 127         if(write(fd, buf, 5) != 5)
 128                 return SIGROK_ERR;
 129
 130         return SIGROK_OK;
 131 }
 132
 133 static int configure_probes(GSList *probes)
 134 {
 135         struct probe *probe;
 136         GSList *l;
 137         int probe_bit, stage, i;
 138         char *tc;
 139
 140         probe_mask = 0;
 141         for(i = 0; i < NUM_TRIGGER_STAGES; i++) {
 142                 trigger_mask[i] = 0;
 143                 trigger_value[i] = 0;
 144         }
 145
 146         for(l = probes; l; l = l->next) {
 147                 probe = (struct probe *) l->data;
 148                 if(!probe->enabled)
 149                         continue;
 150
 151                 /* set up the probe mask for later configuration into the flag register */
 152                 probe_bit = 1 << (probe->index - 1);
 153                 probe_mask |= probe_bit;
 154
 155                 if(probe->trigger)
 156                         continue;
 157
 158                 /* configure trigger mask and value */
 159                 stage = 0;
 160                 for(tc = probe->trigger; tc && *tc; tc++) {
 161                         trigger_mask[stage] |= probe_bit;
 162                         if(*tc == '1')
 163                                 trigger_value[stage] |= probe_bit;
 164                         stage++;
 165                         if(stage > 3)
 166                                 /* TODO: only supporting parallel mode, with up to 4 stages */
 167                                 return SIGROK_NOK;
 168                 }
 169         }
 170
 171         return SIGROK_OK;
 172 }
 173
 174
 175 static void byteswap(uint32_t *in)
 176 {
 177         uint32_t out;
 178
 179         out = (*in & 0xff) << 8;
 180         out |= (*in & 0xff00) >> 8;
 181         out |= (*in & 0xff0000) << 8;
 182         out |= (*in & 0xff000000) >> 8;
 183         *in = out;
 184
 185 }
 186
 187
 188 static int hw_init(char *deviceinfo)
 189 {
 190         struct sigrok_device_instance *sdi;
 191         GSList *ports, *l;
 192         GPollFD *fds;
 193         struct termios term, *prev_termios;
 194         int devcnt, final_devcnt, num_ports, fd, ret, i;
 195         char buf[8], **device_names;
 196
 197         if(deviceinfo)
 198                 ports = g_slist_append(NULL, strdup(deviceinfo));
 199         else
 200                 /* no specific device given, so scan all serial ports */
 201                 ports = list_serial_ports();
 202
 203         num_ports = g_slist_length(ports);
 204         fds = calloc(1, num_ports * sizeof(GPollFD));
 205         device_names = malloc(num_ports * (sizeof(char *)));
 206         prev_termios = malloc(num_ports * sizeof(struct termios));
 207         devcnt = 0;
 208         for(l = ports; l; l = l->next) {
 209                 /* The discovery procedure is like this: first send the Reset command (0x00) 5 times,
 210                  * since the device could be anywhere in a 5-byte command. Then send the ID command
 211                  * (0x02). If the device responds with 4 bytes ("OLS1" or "SLA1"), we have a match.
 212                  * Since it may take the device a while to respond at 115Kb/s, we do all the sending
 213                  * first, then wait for all of them to respond with g_poll().
 214                  */
 215                 g_message("probing %s...", (char *) l->data);
 216                 fd = open(l->data, O_RDWR | O_NONBLOCK);
 217                 if(fd != -1) {
 218                         tcgetattr(fd, &prev_termios[devcnt]);
 219                         tcgetattr(fd, &term);
 220                         cfsetispeed(&term, SERIAL_SPEED);
 221                         term.c_cflag &= ~CSIZE;
 222                         term.c_cflag |= CS8;
 223                         term.c_cflag &= ~CSTOPB;
 224                         term.c_cflag |= IXON | IXOFF;
 225                         term.c_iflag |= IGNPAR;
 226                         tcsetattr(fd, TCSADRAIN, &term);
 227                         ret = SIGROK_OK;
 228                         for(i = 0; i < 5; i++) {
 229                                 if( (ret = send_shortcommand(fd, CMD_RESET)) != SIGROK_OK) {
 230                                         /* serial port is not writable... restore port settings */
 231                                         tcsetattr(fd, TCSADRAIN, &prev_termios[devcnt]);
 232                                         close(fd);
 233                                         break;
 234                                 }
 235                         }
 236                         if(ret != SIGROK_OK)
 237                                 continue;
 238                         send_shortcommand(fd, CMD_ID);
 239                         fds[devcnt].fd = fd;
 240                         fds[devcnt].events = G_IO_IN;
 241                         device_names[devcnt] = strdup(l->data);
 242                         devcnt++;
 243                 }
 244                 free(l->data);
 245         }
 246
 247         /* 2ms should do it, that's enough time for 28 bytes to go over the bus */
 248         usleep(2000);
 249
 250         final_devcnt = 0;
 251         g_poll(fds, devcnt, 1);
 252         for(i = 0; i < devcnt; i++) {
 253                 if(fds[i].revents == G_IO_IN) {
 254                         if(read(fds[i].fd, buf, 4) == 4) {
 255                                 if(!strncmp(buf, "1SLO", 4) || !strncmp(buf, "1ALS", 4)) {
 256                                         if(!strncmp(buf, "1SLO", 4))
 257                                                 sdi = sigrok_device_instance_new(final_devcnt, ST_INACTIVE,
 258                                                                 "Openbench", "Logic Sniffer", "v1.0");
 259                                         else
 260                                                 sdi = sigrok_device_instance_new(final_devcnt, ST_INACTIVE,
 261                                                                 "Sump", "Logic Analyzer", "v1.0");
 262                                         sdi->serial = serial_device_instance_new(device_names[i], -1);
 263                                         device_instances = g_slist_append(device_instances, sdi);
 264                                         final_devcnt++;
 265                                         close(fds[i].fd);
 266                                         fds[i].fd = 0;
 267                                 }
 268                         }
 269                         free(device_names[i]);
 270                 }
 271
 272                 if(fds[i].fd != 0) {
 273                         tcsetattr(fds[i].fd, TCSADRAIN, &prev_termios[i]);
 274                         close(fds[i].fd);
 275                 }
 276         }
 277
 278         free(fds);
 279         free(device_names);
 280         free(prev_termios);
 281         g_slist_free(ports);
 282
 283         cur_samplerate = samplerates.low;
 284
 285         return final_devcnt;
 286 }
 287
 288
 289 static int hw_opendev(int device_index)
 290 {
 291         struct sigrok_device_instance *sdi;
 292
 293         if(!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 294                 return SIGROK_ERR;
 295
 296         sdi->serial->fd = open(sdi->serial->port, O_RDWR);
 297         if(sdi->serial->fd == -1)
 298                 return SIGROK_ERR;
 299
 300         sdi->status = ST_ACTIVE;
 301
 302         return SIGROK_OK;
 303 }
 304
 305
 306 static void hw_closedev(int device_index)
 307 {
 308         struct sigrok_device_instance *sdi;
 309
 310         if(!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 311                 return;
 312
 313         if(sdi->serial->fd != -1) {
 314                 close(sdi->serial->fd);
 315                 sdi->serial->fd = -1;
 316                 sdi->status = ST_INACTIVE;
 317         }
 318
 319 }
 320
 321
 322 static void hw_cleanup(void)
 323 {
 324         GSList *l;
 325         struct sigrok_device_instance *sdi;
 326
 327         /* properly close all devices */
 328         for(l = device_instances; l; l = l->next) {
 329                 sdi = l->data;
 330                 if(sdi->serial->fd != -1)
 331                         close(sdi->serial->fd);
 332                 sigrok_device_instance_free(sdi);
 333         }
 334         g_slist_free(device_instances);
 335         device_instances = NULL;
 336
 337 }
 338
 339
 340 static void *hw_get_device_info(int device_index, int device_info_id)
 341 {
 342         struct sigrok_device_instance *sdi;
 343         void *info;
 344
 345         if( !(sdi = get_sigrok_device_instance(device_instances, device_index)) )
 346                 return NULL;
 347
 348         info = NULL;
 349         switch(device_info_id)
 350         {
 351         case DI_INSTANCE:
 352                 info = sdi;
 353                 break;
 354         case DI_NUM_PROBES:
 355                 info = GINT_TO_POINTER(NUM_PROBES);
 356                 break;
 357         case DI_SAMPLERATES:
 358                 info = &samplerates;
 359                 break;
 360         case DI_TRIGGER_TYPES:
 361                 info = (char *) TRIGGER_TYPES;
 362                 break;
 363         case DI_CUR_SAMPLERATE:
 364                 info = &cur_samplerate;
 365                 break;
 366         }
 367
 368         return info;
 369 }
 370
 371
 372 static int hw_get_status(int device_index)
 373 {
 374         struct sigrok_device_instance *sdi;
 375
 376         if(!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 377                 return ST_NOT_FOUND;
 378
 379         return sdi->status;
 380 }
 381
 382
 383 static int *hw_get_capabilities(void)
 384 {
 385
 386         return capabilities;
 387 }
 388
 389
 390 static int set_configuration_samplerate(struct sigrok_device_instance *sdi, uint64_t samplerate)
 391 {
 392         uint32_t divider;
 393
 394         if(samplerate < samplerates.low || samplerate > samplerates.high)
 395                 return SIGROK_ERR_SAMPLERATE;
 396
 397         if(samplerate  > CLOCK_RATE) {
 398                 flag_reg |= FLAG_DEMUX;
 399                 divider = (CLOCK_RATE * 2 / samplerate) - 1;
 400         }
 401         else {
 402                 flag_reg &= ~FLAG_DEMUX;
 403                 divider = (CLOCK_RATE / samplerate) - 1;
 404         }
 405         divider = htonl(divider);
 406
 407         g_message("setting samplerate to %"PRIu64" Hz (divider %u, demux %s)", samplerate, divider,
 408                         flag_reg & FLAG_DEMUX ? "on" : "off");
 409         if(send_longcommand(sdi->serial->fd, CMD_SET_DIVIDER, divider) != SIGROK_OK)
 410                 return SIGROK_ERR;
 411         cur_samplerate = samplerate;
 412
 413         return SIGROK_OK;
 414 }
 415
 416
 417 static int hw_set_configuration(int device_index, int capability, void *value)
 418 {
 419         struct sigrok_device_instance *sdi;
 420         int ret;
 421         uint64_t *tmp_u64;
 422
 423         if(!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 424                 return SIGROK_ERR;
 425
 426         if(sdi->status != ST_ACTIVE)
 427                 return SIGROK_ERR;
 428
 429         if(capability == HWCAP_SAMPLERATE) {
 430                 tmp_u64 = value;
 431                 ret = set_configuration_samplerate(sdi, *tmp_u64);
 432         }
 433         else if(capability == HWCAP_PROBECONFIG)
 434                 ret = configure_probes( (GSList *) value);
 435         else if(capability == HWCAP_LIMIT_SAMPLES) {
 436                 limit_samples = strtoull(value, NULL, 10);
 437                 ret = SIGROK_OK;
 438         }
 439         else if(capability == HWCAP_CAPTURE_RATIO) {
 440                 capture_ratio = strtol(value, NULL, 10);
 441                 if(capture_ratio < 0 || capture_ratio > 100) {
 442                         capture_ratio = 0;
 443                         ret = SIGROK_ERR;
 444                 }
 445                 else
 446                         ret = SIGROK_OK;
 447         }
 448         else
 449                 ret = SIGROK_ERR;
 450
 451         return ret;
 452 }
 453
 454
 455 static int receive_data(int fd, int revents, void *user_data)
 456 {
 457         static int num_transfers = 0;
 458         static int num_bytes = 0;
 459         static char last_sample[4] = {0xff};
 460         static unsigned char sample[4] = {0}, tmp_sample[4];
 461         int count, buflen, num_channels, i, j;
 462         struct datafeed_packet packet;
 463         unsigned char byte, *buffer;
 464
 465         if(num_transfers++ == 0) {
 466                 /* first time round, means the device started sending data, and will not
 467                  * stop until done. if it stops sending for longer than it takes to send
 468                  * a byte, that means it's finished. we'll double that to 30ms to be sure...
 469                  */
 470                 source_remove(fd);
 471                 source_add(fd, G_IO_IN, 100, receive_data, user_data);
 472         }
 473
 474         num_channels = 0;
 475         for(i = 0x20; i > 0x02; i /= 2)
 476                 if((flag_reg & i) == 0)
 477                         num_channels++;
 478
 479         if(revents == G_IO_IN && num_transfers / num_channels <= limit_samples) {
 480                 if(read(fd, &byte, 1) != 1)
 481                         return FALSE;
 482
 483                 sample[num_bytes++] = byte;
 484                 if(num_bytes == num_channels) {
 485                         /* got a full sample */
 486                         if(flag_reg & FLAG_RLE) {
 487                                 /* in RLE mode -1 should never come in as a sample, because
 488                                  * bit 31 is the "count" flag */
 489                                 /* TODO: endianness may be wrong here, could be sample[3] */
 490                                 if(sample[0] & 0x80 && !(last_sample[0] & 0x80)) {
 491                                         count = (int) (*sample) & 0x7fffffff;
 492                                         buffer = g_malloc(count);
 493                                         buflen = 0;
 494                                         for(i = 0; i < count; i++)
 495                                         {
 496                                                 memcpy(buffer + buflen , last_sample, 4);
 497                                                 buflen += 4;
 498                                         }
 499                                 }
 500                                 else {
 501                                         /* just a single sample, next sample will probably be a count
 502                                          * referring to this -- but this one is still a part of the stream
 503                                          */
 504                                         buffer = sample;
 505                                         buflen = 4;
 506                                 }
 507                         }
 508                         else {
 509                                 /* no compression */
 510                                 buffer = sample;
 511                                 buflen = 4;
 512                         }
 513
 514                         if(num_channels < 4) {
 515                                 /* some channel groups may have been turned off, to speed up transfer
 516                                  * between the hardware and the PC. expand that here before submitting
 517                                  * it over the session bus -- whatever is listening on the bus will be
 518                                  * expecting a full 32-bit sample, based on the number of probes.
 519                                  */
 520                                 j = 0;
 521                                 memset(tmp_sample, 0, 4);
 522                                 for(i = 0; i < 4; i++) {
 523                                         if((flag_reg & (8 >> i)) == 0) {
 524                                                 /* this channel group was enabled, copy from received sample */
 525                                                 tmp_sample[i] = sample[j++];
 526                                         }
 527                                 }
 528                                 memcpy(sample, tmp_sample, 4);
 529                         }
 530
 531                         /* send it all to the session bus */
 532                         packet.type = DF_LOGIC32;
 533                         packet.length = buflen;
 534                         packet.payload = buffer;
 535                         session_bus(user_data, &packet);
 536                         if(buffer == sample)
 537                                 memcpy(last_sample, buffer, num_channels);
 538                         else
 539                                 g_free(buffer);
 540
 541                         memset(sample, 0, 4);
 542                         num_bytes = 0;
 543                 }
 544         }
 545         else {
 546                 /* this is the main loop telling us a timeout was reached, or we've
 547                  * acquired all the samples we asked for -- we're done */
 548                 tcflush(fd, TCIOFLUSH);
 549                 close(fd);
 550                 packet.type = DF_END;
 551                 packet.length = 0;
 552                 session_bus(user_data, &packet);
 553         }
 554
 555         return TRUE;
 556 }
 557
 558
 559 static int hw_start_acquisition(int device_index, gpointer session_device_id)
 560 {
 561         struct datafeed_packet *packet;
 562         struct datafeed_header *header;
 563         struct sigrok_device_instance *sdi;
 564         int i;
 565         uint32_t data;
 566         uint16_t readcount, delaycount;
 567         uint8_t changrp_mask;
 568
 569         if(!(sdi = get_sigrok_device_instance(device_instances, device_index)))
 570                 return SIGROK_ERR;
 571
 572         if(sdi->status != ST_ACTIVE)
 573                 return SIGROK_ERR;
 574
 575         if(trigger_mask[0]) {
 576                 /* trigger masks */
 577                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0, trigger_mask[0]) != SIGROK_OK)
 578                         return SIGROK_NOK;
 579                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_1, trigger_mask[1]) != SIGROK_OK)
 580                         return SIGROK_NOK;
 581                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_2, trigger_mask[2]) != SIGROK_OK)
 582                         return SIGROK_NOK;
 583                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_3, trigger_mask[3]) != SIGROK_OK)
 584                         return SIGROK_NOK;
 585
 586                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0, trigger_value[0]) != SIGROK_OK)
 587                         return SIGROK_NOK;
 588                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_1, trigger_value[1]) != SIGROK_OK)
 589                         return SIGROK_NOK;
 590                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_2, trigger_value[2]) != SIGROK_OK)
 591                         return SIGROK_NOK;
 592                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_3, trigger_value[3]) != SIGROK_OK)
 593                         return SIGROK_NOK;
 594
 595                 /* trigger configuration */
 596                 /* TODO: the start flag should only be on the last used stage I think... */
 597                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0, 0x00000008) != SIGROK_OK)
 598                         return SIGROK_NOK;
 599                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_1, 0x00000000) != SIGROK_OK)
 600                         return SIGROK_NOK;
 601                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_2, 0x00000000) != SIGROK_OK)
 602                         return SIGROK_NOK;
 603                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_3, 0x00000000) != SIGROK_OK)
 604                         return SIGROK_NOK;
 605                 delaycount = limit_samples / 4 * (capture_ratio / 100);
 606         } else {
 607                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_MASK_0, trigger_mask[0]) != SIGROK_OK)
 608                         return SIGROK_NOK;
 609                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_VALUE_0, trigger_value[0]) != SIGROK_OK)
 610                         return SIGROK_NOK;
 611                 if(send_longcommand(sdi->serial->fd, CMD_SET_TRIGGER_CONFIG_0, 0x00000008) != SIGROK_OK)
 612                         return SIGROK_NOK;
 613                 delaycount = limit_samples / 4;
 614         }
 615
 616         set_configuration_samplerate(sdi, cur_samplerate);
 617
 618         /* send sample limit and pre/post-trigger capture ratio */
 619         readcount = limit_samples / 4;
 620         if(flag_reg & FLAG_DEMUX) {
 621                 data = (delaycount - 8) & 0xfff8 << 13;
 622                 data |= (readcount - 4) & 0xffff;
 623         } else {
 624                 flag_reg |= FLAG_FILTER;
 625                 data = (readcount - 1) << 16;
 626                 data |= (delaycount - 1);
 627         }
 628         /* TODO: htonl()? */
 629         byteswap(&data);
 630         if(send_longcommand(sdi->serial->fd, CMD_CAPTURE_SIZE, data) != SIGROK_OK)
 631                 return SIGROK_ERR;
 632
 633         /* flag register */
 634         /* enable/disable channel groups in the flag register according to the
 635          * probe mask. The register stores them backwards, hence shift right from 1000.
 636          */
 637         changrp_mask = 0;
 638         for(i = 0; i < 4; i++)
 639         {
 640                 if(probe_mask & (0xff << (i * 8)))
 641                         changrp_mask |= (8 >> i);
 642         }
 643         /* but the flag register wants them here, with 1 meaning "disable channel" */
 644         flag_reg |= ~(changrp_mask << 2) & 0x3c;
 645
 646         data = flag_reg << 24;
 647         if(send_longcommand(sdi->serial->fd, CMD_SET_FLAGS, data) != SIGROK_OK)
 648                 return SIGROK_NOK;
 649
 650         /* start acquisition on the device */
 651         if(send_shortcommand(sdi->serial->fd, CMD_RUN) != SIGROK_OK)
 652                 return SIGROK_ERR;
 653
 654         source_add(sdi->serial->fd, G_IO_IN, -1, receive_data, session_device_id);
 655
 656         /* send header packet to the session bus */
 657         packet = g_malloc(sizeof(struct datafeed_packet));
 658         header = g_malloc(sizeof(struct datafeed_header));
 659         if(!packet || !header)
 660                 return SIGROK_ERR;
 661         packet->type = DF_HEADER;
 662         packet->length = sizeof(struct datafeed_header);
 663         packet->payload = (unsigned char *) header;
 664         header->feed_version = 1;
 665         gettimeofday(&header->starttime, NULL);
 666         header->samplerate = cur_samplerate;
 667         header->protocol_id = PROTO_RAW;
 668         header->num_probes = NUM_PROBES;
 669         session_bus(session_device_id, packet);
 670         g_free(header);
 671         g_free(packet);
 672
 673         return SIGROK_OK;
 674 }
 675
 676
 677 static void hw_stop_acquisition(int device_index, gpointer session_device_id)
 678 {
 679         struct datafeed_packet packet;
 680
 681         packet.type = DF_END;
 682         packet.length = 0;
 683         session_bus(session_device_id, &packet);
 684
 685 }
 686
 687
 688
 689 struct device_plugin ols_plugin_info = {
 690         "sump",
 691         1,
 692         hw_init,
 693         hw_cleanup,
 694
 695         hw_opendev,
 696         hw_closedev,
 697         hw_get_device_info,
 698         hw_get_status,
 699         hw_get_capabilities,
 700         hw_set_configuration,
 701         hw_start_acquisition,
 702         hw_stop_acquisition
 703 };
 704