src/hardware/hameg-hmo/protocol.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com>
   5  * Copyright (C) 2018 Guido Trentalancia <guido@trentalancia.com>
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22 #include <math.h>
  23 #include <stdlib.h>
  24 #include "scpi.h"
  25 #include "protocol.h"
  26
  27 SR_PRIV void hmo_queue_logic_data(struct dev_context *devc,
  28                                   size_t group, GByteArray *pod_data);
  29 SR_PRIV void hmo_send_logic_packet(struct sr_dev_inst *sdi,
  30                                    struct dev_context *devc);
  31 SR_PRIV void hmo_cleanup_logic_data(struct dev_context *devc);
  32
  33 static const char *hameg_scpi_dialect[] = {
  34         [SCPI_CMD_GET_DIG_DATA]               = ":FORM UINT,8;:POD%d:DATA?",
  35         [SCPI_CMD_GET_TIMEBASE]               = ":TIM:SCAL?",
  36         [SCPI_CMD_SET_TIMEBASE]               = ":TIM:SCAL %s",
  37         [SCPI_CMD_GET_HORIZONTAL_DIV]         = ":TIM:DIV?",
  38         [SCPI_CMD_GET_COUPLING]               = ":CHAN%d:COUP?",
  39         [SCPI_CMD_SET_COUPLING]               = ":CHAN%d:COUP %s",
  40         [SCPI_CMD_GET_SAMPLE_RATE]            = ":ACQ:SRAT?",
  41         [SCPI_CMD_GET_ANALOG_DATA]            = ":FORM:BORD %s;" \
  42                                                 ":FORM REAL,32;:CHAN%d:DATA?",
  43         [SCPI_CMD_GET_VERTICAL_SCALE]         = ":CHAN%d:SCAL?",
  44         [SCPI_CMD_SET_VERTICAL_SCALE]         = ":CHAN%d:SCAL %s",
  45         [SCPI_CMD_GET_DIG_POD_STATE]          = ":POD%d:STAT?",
  46         [SCPI_CMD_SET_DIG_POD_STATE]          = ":POD%d:STAT %d",
  47         [SCPI_CMD_GET_TRIGGER_SOURCE]         = ":TRIG:A:SOUR?",
  48         [SCPI_CMD_SET_TRIGGER_SOURCE]         = ":TRIG:A:SOUR %s",
  49         [SCPI_CMD_GET_TRIGGER_SLOPE]          = ":TRIG:A:EDGE:SLOP?",
  50         [SCPI_CMD_SET_TRIGGER_SLOPE]          = ":TRIG:A:TYPE EDGE;:TRIG:A:EDGE:SLOP %s",
  51         [SCPI_CMD_GET_TRIGGER_PATTERN]        = ":TRIG:A:PATT:SOUR?",
  52         [SCPI_CMD_SET_TRIGGER_PATTERN]        = ":TRIG:A:TYPE LOGIC;" \
  53                                                 ":TRIG:A:PATT:FUNC AND;" \
  54                                                 ":TRIG:A:PATT:COND \"TRUE\";" \
  55                                                 ":TRIG:A:PATT:MODE OFF;" \
  56                                                 ":TRIG:A:PATT:SOUR \"%s\"",
  57         [SCPI_CMD_GET_HIGH_RESOLUTION]        = ":ACQ:HRES?",
  58         [SCPI_CMD_SET_HIGH_RESOLUTION]        = ":ACQ:HRES %s",
  59         [SCPI_CMD_GET_PEAK_DETECTION]         = ":ACQ:PEAK?",
  60         [SCPI_CMD_SET_PEAK_DETECTION]         = ":ACQ:PEAK %s",
  61         [SCPI_CMD_GET_DIG_CHAN_STATE]         = ":LOG%d:STAT?",
  62         [SCPI_CMD_SET_DIG_CHAN_STATE]         = ":LOG%d:STAT %d",
  63         [SCPI_CMD_GET_VERTICAL_OFFSET]        = ":CHAN%d:POS?",
  64         [SCPI_CMD_GET_HORIZ_TRIGGERPOS]       = ":TIM:POS?",
  65         [SCPI_CMD_SET_HORIZ_TRIGGERPOS]       = ":TIM:POS %s",
  66         [SCPI_CMD_GET_ANALOG_CHAN_STATE]      = ":CHAN%d:STAT?",
  67         [SCPI_CMD_SET_ANALOG_CHAN_STATE]      = ":CHAN%d:STAT %d",
  68         [SCPI_CMD_GET_PROBE_UNIT]             = ":PROB%d:SET:ATT:UNIT?",
  69         [SCPI_CMD_GET_DIG_POD_THRESHOLD]      = ":POD%d:THR?",
  70         [SCPI_CMD_SET_DIG_POD_THRESHOLD]      = ":POD%d:THR %s",
  71         [SCPI_CMD_GET_DIG_POD_USER_THRESHOLD] = ":POD%d:THR:UDL%d?",
  72         [SCPI_CMD_SET_DIG_POD_USER_THRESHOLD] = ":POD%d:THR:UDL%d %s",
  73 };
  74
  75 static const char *rohde_schwarz_log_not_pod_scpi_dialect[] = {
  76         [SCPI_CMD_GET_DIG_DATA]               = ":FORM UINT,8;:LOG%d:DATA?",
  77         [SCPI_CMD_GET_TIMEBASE]               = ":TIM:SCAL?",
  78         [SCPI_CMD_SET_TIMEBASE]               = ":TIM:SCAL %s",
  79         [SCPI_CMD_GET_HORIZONTAL_DIV]         = ":TIM:DIV?",
  80         [SCPI_CMD_GET_COUPLING]               = ":CHAN%d:COUP?",
  81         [SCPI_CMD_SET_COUPLING]               = ":CHAN%d:COUP %s",
  82         [SCPI_CMD_GET_SAMPLE_RATE]            = ":ACQ:SRAT?",
  83         [SCPI_CMD_GET_ANALOG_DATA]            = ":FORM:BORD %s;" \
  84                                                 ":FORM REAL,32;:CHAN%d:DATA?",
  85         [SCPI_CMD_GET_VERTICAL_SCALE]         = ":CHAN%d:SCAL?",
  86         [SCPI_CMD_SET_VERTICAL_SCALE]         = ":CHAN%d:SCAL %s",
  87         [SCPI_CMD_GET_DIG_POD_STATE]          = ":LOG%d:STAT?",
  88         [SCPI_CMD_SET_DIG_POD_STATE]          = ":LOG%d:STAT %d",
  89         [SCPI_CMD_GET_TRIGGER_SOURCE]         = ":TRIG:A:SOUR?",
  90         [SCPI_CMD_SET_TRIGGER_SOURCE]         = ":TRIG:A:SOUR %s",
  91         [SCPI_CMD_GET_TRIGGER_SLOPE]          = ":TRIG:A:EDGE:SLOP?",
  92         [SCPI_CMD_SET_TRIGGER_SLOPE]          = ":TRIG:A:TYPE EDGE;:TRIG:A:EDGE:SLOP %s",
  93         [SCPI_CMD_GET_TRIGGER_PATTERN]        = ":TRIG:A:PATT:SOUR?",
  94         [SCPI_CMD_SET_TRIGGER_PATTERN]        = ":TRIG:A:TYPE LOGIC;" \
  95                                                 ":TRIG:A:PATT:FUNC AND;" \
  96                                                 ":TRIG:A:PATT:COND \"TRUE\";" \
  97                                                 ":TRIG:A:PATT:MODE OFF;" \
  98                                                 ":TRIG:A:PATT:SOUR \"%s\"",
  99         [SCPI_CMD_GET_HIGH_RESOLUTION]        = ":ACQ:HRES?",
 100         [SCPI_CMD_SET_HIGH_RESOLUTION]        = ":ACQ:HRES %s",
 101         [SCPI_CMD_GET_PEAK_DETECTION]         = ":ACQ:PEAK?",
 102         [SCPI_CMD_SET_PEAK_DETECTION]         = ":ACQ:PEAK %s",
 103         [SCPI_CMD_GET_DIG_CHAN_STATE]         = ":LOG%d:STAT?",
 104         [SCPI_CMD_SET_DIG_CHAN_STATE]         = ":LOG%d:STAT %d",
 105         [SCPI_CMD_GET_VERTICAL_OFFSET]        = ":CHAN%d:POS?", /* Might not be supported on RTB200x... */
 106         [SCPI_CMD_GET_HORIZ_TRIGGERPOS]       = ":TIM:POS?",
 107         [SCPI_CMD_SET_HORIZ_TRIGGERPOS]       = ":TIM:POS %s",
 108         [SCPI_CMD_GET_ANALOG_CHAN_STATE]      = ":CHAN%d:STAT?",
 109         [SCPI_CMD_SET_ANALOG_CHAN_STATE]      = ":CHAN%d:STAT %d",
 110         [SCPI_CMD_GET_PROBE_UNIT]             = ":PROB%d:SET:ATT:UNIT?",
 111         [SCPI_CMD_GET_DIG_POD_THRESHOLD]      = ":DIG%d:TECH?",
 112         [SCPI_CMD_SET_DIG_POD_THRESHOLD]      = ":DIG%d:TECH %s",
 113         [SCPI_CMD_GET_DIG_POD_USER_THRESHOLD] = ":DIG%d:THR?",
 114         [SCPI_CMD_SET_DIG_POD_USER_THRESHOLD] = ":DIG%d:THR %s",
 115 };
 116
 117 static const uint32_t devopts[] = {
 118         SR_CONF_OSCILLOSCOPE,
 119         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
 120         SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
 121         SR_CONF_SAMPLERATE | SR_CONF_GET,
 122         SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
 123         SR_CONF_NUM_HDIV | SR_CONF_GET,
 124         SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
 125         SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
 126         SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
 127         SR_CONF_TRIGGER_PATTERN | SR_CONF_GET | SR_CONF_SET,
 128         SR_CONF_HIGH_RESOLUTION | SR_CONF_GET | SR_CONF_SET,
 129         SR_CONF_PEAK_DETECTION | SR_CONF_GET | SR_CONF_SET,
 130 };
 131
 132 static const uint32_t devopts_cg_analog[] = {
 133         SR_CONF_NUM_VDIV | SR_CONF_GET,
 134         SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
 135         SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
 136 };
 137
 138 static const uint32_t devopts_cg_digital[] = {
 139         SR_CONF_LOGIC_THRESHOLD | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
 140         SR_CONF_LOGIC_THRESHOLD_CUSTOM | SR_CONF_GET | SR_CONF_SET,
 141 };
 142
 143 static const char *coupling_options[] = {
 144         "AC",  // AC with 50 Ohm termination (152x, 202x, 30xx, 1202)
 145         "ACL", // AC with 1 MOhm termination
 146         "DC",  // DC with 50 Ohm termination
 147         "DCL", // DC with 1 MOhm termination
 148         "GND",
 149 };
 150
 151 static const char *coupling_options_rtb200x[] = {
 152         "ACL", // AC with 1 MOhm termination
 153         "DCL", // DC with 1 MOhm termination
 154         "GND",
 155 };
 156
 157 static const char *coupling_options_rtm300x[] = {
 158         "ACL", // AC with 1 MOhm termination
 159         "DC",  // DC with 50 Ohm termination
 160         "DCL", // DC with 1 MOhm termination
 161         "GND",
 162 };
 163
 164 static const char *coupling_options_rth100x[] = {
 165         "ACL", // AC with 1 MOhm termination
 166         "DCL", // DC with 1 MOhm termination
 167 };
 168
 169 static const char *scope_trigger_slopes[] = {
 170         "POS",
 171         "NEG",
 172         "EITH",
 173 };
 174
 175 /* Predefined logic thresholds. */
 176 static const char *logic_threshold[] = {
 177         "TTL",
 178         "ECL",
 179         "CMOS",
 180         "USER1",
 181         "USER2", // overwritten by logic_threshold_custom, use USER1 for permanent setting
 182 };
 183
 184 static const char *logic_threshold_rtb200x_rtm300x[] = {
 185         "TTL",
 186         "ECL",
 187         "CMOS",
 188         "MAN", // overwritten by logic_threshold_custom
 189 };
 190
 191 /* This might need updates whenever logic_threshold* above change. */
 192 #define MAX_NUM_LOGIC_THRESHOLD_ENTRIES ARRAY_SIZE(logic_threshold)
 193
 194 /* RTC1002, HMO Compact2 and HMO1002/HMO1202 */
 195 static const char *an2_dig8_trigger_sources[] = {
 196         "CH1", "CH2",
 197         "LINE", "EXT", "PATT", "BUS1", "BUS2",
 198         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
 199 };
 200
 201 /* HMO3xx2 */
 202 static const char *an2_dig16_trigger_sources[] = {
 203         "CH1", "CH2",
 204         "LINE", "EXT", "PATT", "BUS1", "BUS2",
 205         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
 206         "D8", "D9", "D10", "D11", "D12", "D13", "D14", "D15",
 207 };
 208
 209 /* RTB2002 and RTM3002 */
 210 static const char *an2_dig16_sbus_trigger_sources[] = {
 211         "CH1", "CH2",
 212         "LINE", "EXT", "PATT", "SBUS1", "SBUS2",
 213         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
 214         "D8", "D9", "D10", "D11", "D12", "D13", "D14", "D15",
 215 };
 216
 217 /* RTH1002 */
 218 static const char *an2_dig8_isol_trigger_sources[] = {
 219         "CH1", "CH2",
 220         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
 221 };
 222
 223 /* RTH1004 */
 224 static const char *an4_dig8_isol_trigger_sources[] = {
 225         "CH1", "CH2", "CH3", "CH4",
 226         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
 227 };
 228
 229 /* HMO Compact4 */
 230 static const char *an4_dig8_trigger_sources[] = {
 231         "CH1", "CH2", "CH3", "CH4",
 232         "LINE", "EXT", "PATT", "BUS1", "BUS2",
 233         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
 234 };
 235
 236 /* HMO3xx4 and HMO2524 */
 237 static const char *an4_dig16_trigger_sources[] = {
 238         "CH1", "CH2", "CH3", "CH4",
 239         "LINE", "EXT", "PATT", "BUS1", "BUS2",
 240         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
 241         "D8", "D9", "D10", "D11", "D12", "D13", "D14", "D15",
 242 };
 243
 244 /* RTB2004, RTM3004 and RTA4004 */
 245 static const char *an4_dig16_sbus_trigger_sources[] = {
 246         "CH1", "CH2", "CH3", "CH4",
 247         "LINE", "EXT", "PATT", "SBUS1", "SBUS2",
 248         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
 249         "D8", "D9", "D10", "D11", "D12", "D13", "D14", "D15",
 250 };
 251
 252 static const uint64_t timebases[][2] = {
 253         /* nanoseconds */
 254         { 1, 1000000000 },
 255         { 2, 1000000000 },
 256         { 5, 1000000000 },
 257         { 10, 1000000000 },
 258         { 20, 1000000000 },
 259         { 50, 1000000000 },
 260         { 100, 1000000000 },
 261         { 200, 1000000000 },
 262         { 500, 1000000000 },
 263         /* microseconds */
 264         { 1, 1000000 },
 265         { 2, 1000000 },
 266         { 5, 1000000 },
 267         { 10, 1000000 },
 268         { 20, 1000000 },
 269         { 50, 1000000 },
 270         { 100, 1000000 },
 271         { 200, 1000000 },
 272         { 500, 1000000 },
 273         /* milliseconds */
 274         { 1, 1000 },
 275         { 2, 1000 },
 276         { 5, 1000 },
 277         { 10, 1000 },
 278         { 20, 1000 },
 279         { 50, 1000 },
 280         { 100, 1000 },
 281         { 200, 1000 },
 282         { 500, 1000 },
 283         /* seconds */
 284         { 1, 1 },
 285         { 2, 1 },
 286         { 5, 1 },
 287         { 10, 1 },
 288         { 20, 1 },
 289         { 50, 1 },
 290 };
 291
 292 /* HMO Compact series (HMO722/724/1022/1024/1522/1524/2022/2024) do
 293  * not support 1 ns timebase setting.
 294  */
 295 static const uint64_t timebases_hmo_compact[][2] = {
 296         /* nanoseconds */
 297         { 2, 1000000000 },
 298         { 5, 1000000000 },
 299         { 10, 1000000000 },
 300         { 20, 1000000000 },
 301         { 50, 1000000000 },
 302         { 100, 1000000000 },
 303         { 200, 1000000000 },
 304         { 500, 1000000000 },
 305         /* microseconds */
 306         { 1, 1000000 },
 307         { 2, 1000000 },
 308         { 5, 1000000 },
 309         { 10, 1000000 },
 310         { 20, 1000000 },
 311         { 50, 1000000 },
 312         { 100, 1000000 },
 313         { 200, 1000000 },
 314         { 500, 1000000 },
 315         /* milliseconds */
 316         { 1, 1000 },
 317         { 2, 1000 },
 318         { 5, 1000 },
 319         { 10, 1000 },
 320         { 20, 1000 },
 321         { 50, 1000 },
 322         { 100, 1000 },
 323         { 200, 1000 },
 324         { 500, 1000 },
 325         /* seconds */
 326         { 1, 1 },
 327         { 2, 1 },
 328         { 5, 1 },
 329         { 10, 1 },
 330         { 20, 1 },
 331         { 50, 1 },
 332 };
 333
 334 static const uint64_t vdivs[][2] = {
 335         /* millivolts */
 336         { 1, 1000 },
 337         { 2, 1000 },
 338         { 5, 1000 },
 339         { 10, 1000 },
 340         { 20, 1000 },
 341         { 50, 1000 },
 342         { 100, 1000 },
 343         { 200, 1000 },
 344         { 500, 1000 },
 345         /* volts */
 346         { 1, 1 },
 347         { 2, 1 },
 348         { 5, 1 },
 349         { 10, 1 },
 350         { 20, 1 },
 351         { 50, 1 },
 352 };
 353 /*
 354  * It feels a little hacky to use a single table yet use different item
 355  * count values here. But it simplifies maintenance, reduces redundancy
 356  * by avoiding several vdivs[] table versions of mostly identical content,
 357  * still references which declare models' capabilities remain readable.
 358  */
 359 #define VDIVS_COUNT_UPTO_10V    (ARRAY_SIZE(vdivs) - 2)
 360 #define VDIVS_COUNT_UPTO_50V    (ARRAY_SIZE(vdivs))
 361
 362 static const char *scope_analog_channel_names[] = {
 363         "CH1", "CH2", "CH3", "CH4",
 364 };
 365
 366 static const char *scope_digital_channel_names[] = {
 367         "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
 368         "D8", "D9", "D10", "D11", "D12", "D13", "D14", "D15",
 369 };
 370
 371 static struct scope_config scope_models[] = {
 372         {
 373                 /* HMO Compact2: HMO722/1022/1522/2022 support only 8 digital channels. */
 374                 .name = {"HMO722", "HMO1022", "HMO1522", "HMO2022", NULL},
 375                 .analog_channels = 2,
 376                 .digital_channels = 8,
 377
 378                 .analog_names = &scope_analog_channel_names,
 379                 .digital_names = &scope_digital_channel_names,
 380
 381                 .devopts = &devopts,
 382                 .num_devopts = ARRAY_SIZE(devopts),
 383
 384                 .devopts_cg_analog = &devopts_cg_analog,
 385                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 386
 387                 .devopts_cg_digital = &devopts_cg_digital,
 388                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 389
 390                 .coupling_options = &coupling_options,
 391                 .num_coupling_options = ARRAY_SIZE(coupling_options),
 392
 393                 .logic_threshold = &logic_threshold,
 394                 .num_logic_threshold = ARRAY_SIZE(logic_threshold),
 395                 .logic_threshold_for_pod = TRUE,
 396
 397                 .trigger_sources = &an2_dig8_trigger_sources,
 398                 .num_trigger_sources = ARRAY_SIZE(an2_dig8_trigger_sources),
 399
 400                 .trigger_slopes = &scope_trigger_slopes,
 401                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 402
 403                 .timebases = &timebases_hmo_compact,
 404                 .num_timebases = ARRAY_SIZE(timebases_hmo_compact),
 405
 406                 .vdivs = &vdivs,
 407                 .num_vdivs = VDIVS_COUNT_UPTO_10V,
 408
 409                 .num_ydivs = 8,
 410
 411                 .scpi_dialect = &hameg_scpi_dialect,
 412         },
 413         {
 414                 /* RTC1002 and HMO1002/HMO1202 support only 8 digital channels. */
 415                 .name = {"RTC1002", "HMO1002", "HMO1202", NULL},
 416                 .analog_channels = 2,
 417                 .digital_channels = 8,
 418
 419                 .analog_names = &scope_analog_channel_names,
 420                 .digital_names = &scope_digital_channel_names,
 421
 422                 .devopts = &devopts,
 423                 .num_devopts = ARRAY_SIZE(devopts),
 424
 425                 .devopts_cg_analog = &devopts_cg_analog,
 426                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 427
 428                 .devopts_cg_digital = &devopts_cg_digital,
 429                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 430
 431                 .coupling_options = &coupling_options,
 432                 .num_coupling_options = ARRAY_SIZE(coupling_options),
 433
 434                 .logic_threshold = &logic_threshold,
 435                 .num_logic_threshold = ARRAY_SIZE(logic_threshold),
 436                 .logic_threshold_for_pod = TRUE,
 437
 438                 .trigger_sources = &an2_dig8_trigger_sources,
 439                 .num_trigger_sources = ARRAY_SIZE(an2_dig8_trigger_sources),
 440
 441                 .trigger_slopes = &scope_trigger_slopes,
 442                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 443
 444                 .timebases = &timebases,
 445                 .num_timebases = ARRAY_SIZE(timebases),
 446
 447                 .vdivs = &vdivs,
 448                 .num_vdivs = VDIVS_COUNT_UPTO_10V,
 449
 450                 .num_ydivs = 8,
 451
 452                 .scpi_dialect = &hameg_scpi_dialect,
 453         },
 454         {
 455                 /* HMO3032/3042/3052/3522 support 16 digital channels. */
 456                 .name = {"HMO3032", "HMO3042", "HMO3052", "HMO3522", NULL},
 457                 .analog_channels = 2,
 458                 .digital_channels = 16,
 459
 460                 .analog_names = &scope_analog_channel_names,
 461                 .digital_names = &scope_digital_channel_names,
 462
 463                 .devopts = &devopts,
 464                 .num_devopts = ARRAY_SIZE(devopts),
 465
 466                 .devopts_cg_analog = &devopts_cg_analog,
 467                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 468
 469                 .devopts_cg_digital = &devopts_cg_digital,
 470                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 471
 472                 .coupling_options = &coupling_options,
 473                 .num_coupling_options = ARRAY_SIZE(coupling_options),
 474
 475                 .logic_threshold = &logic_threshold,
 476                 .num_logic_threshold = ARRAY_SIZE(logic_threshold),
 477                 .logic_threshold_for_pod = TRUE,
 478
 479                 .trigger_sources = &an2_dig16_trigger_sources,
 480                 .num_trigger_sources = ARRAY_SIZE(an2_dig16_trigger_sources),
 481
 482                 .trigger_slopes = &scope_trigger_slopes,
 483                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 484
 485                 .timebases = &timebases,
 486                 .num_timebases = ARRAY_SIZE(timebases),
 487
 488                 .vdivs = &vdivs,
 489                 .num_vdivs = VDIVS_COUNT_UPTO_10V,
 490
 491                 .num_ydivs = 8,
 492
 493                 .scpi_dialect = &hameg_scpi_dialect,
 494         },
 495         {
 496                 /* HMO Compact4: HMO724/1024/1524/2024 support only 8 digital channels. */
 497                 .name = {"HMO724", "HMO1024", "HMO1524", "HMO2024", NULL},
 498                 .analog_channels = 4,
 499                 .digital_channels = 8,
 500
 501                 .analog_names = &scope_analog_channel_names,
 502                 .digital_names = &scope_digital_channel_names,
 503
 504                 .devopts = &devopts,
 505                 .num_devopts = ARRAY_SIZE(devopts),
 506
 507                 .devopts_cg_analog = &devopts_cg_analog,
 508                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 509
 510                 .devopts_cg_digital = &devopts_cg_digital,
 511                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 512
 513                 .coupling_options = &coupling_options,
 514                 .num_coupling_options = ARRAY_SIZE(coupling_options),
 515
 516                 .logic_threshold = &logic_threshold,
 517                 .num_logic_threshold = ARRAY_SIZE(logic_threshold),
 518                 .logic_threshold_for_pod = TRUE,
 519
 520                 .trigger_sources = &an4_dig8_trigger_sources,
 521                 .num_trigger_sources = ARRAY_SIZE(an4_dig8_trigger_sources),
 522
 523                 .trigger_slopes = &scope_trigger_slopes,
 524                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 525
 526                 .timebases = &timebases_hmo_compact,
 527                 .num_timebases = ARRAY_SIZE(timebases_hmo_compact),
 528
 529                 .vdivs = &vdivs,
 530                 .num_vdivs = VDIVS_COUNT_UPTO_10V,
 531
 532                 .num_ydivs = 8,
 533
 534                 .scpi_dialect = &hameg_scpi_dialect,
 535         },
 536         {
 537                 .name = {"HMO2524", "HMO3034", "HMO3044", "HMO3054", "HMO3524", NULL},
 538                 .analog_channels = 4,
 539                 .digital_channels = 16,
 540
 541                 .analog_names = &scope_analog_channel_names,
 542                 .digital_names = &scope_digital_channel_names,
 543
 544                 .devopts = &devopts,
 545                 .num_devopts = ARRAY_SIZE(devopts),
 546
 547                 .devopts_cg_analog = &devopts_cg_analog,
 548                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 549
 550                 .devopts_cg_digital = &devopts_cg_digital,
 551                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 552
 553                 .coupling_options = &coupling_options,
 554                 .num_coupling_options = ARRAY_SIZE(coupling_options),
 555
 556                 .logic_threshold = &logic_threshold,
 557                 .num_logic_threshold = ARRAY_SIZE(logic_threshold),
 558                 .logic_threshold_for_pod = TRUE,
 559
 560                 .trigger_sources = &an4_dig16_trigger_sources,
 561                 .num_trigger_sources = ARRAY_SIZE(an4_dig16_trigger_sources),
 562
 563                 .trigger_slopes = &scope_trigger_slopes,
 564                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 565
 566                 .timebases = &timebases,
 567                 .num_timebases = ARRAY_SIZE(timebases),
 568
 569                 .vdivs = &vdivs,
 570                 .num_vdivs = VDIVS_COUNT_UPTO_10V,
 571
 572                 .num_ydivs = 8,
 573
 574                 .scpi_dialect = &hameg_scpi_dialect,
 575         },
 576         {
 577                 .name = {"RTB2002", NULL},
 578                 .analog_channels = 2,
 579                 .digital_channels = 16,
 580
 581                 .analog_names = &scope_analog_channel_names,
 582                 .digital_names = &scope_digital_channel_names,
 583
 584                 .devopts = &devopts,
 585                 .num_devopts = ARRAY_SIZE(devopts),
 586
 587                 .devopts_cg_analog = &devopts_cg_analog,
 588                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 589
 590                 .devopts_cg_digital = &devopts_cg_digital,
 591                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 592
 593                 .coupling_options = &coupling_options_rtb200x,
 594                 .num_coupling_options = ARRAY_SIZE(coupling_options_rtb200x),
 595
 596                 .logic_threshold = &logic_threshold_rtb200x_rtm300x,
 597                 .num_logic_threshold = ARRAY_SIZE(logic_threshold_rtb200x_rtm300x),
 598                 .logic_threshold_for_pod = FALSE,
 599
 600                 .trigger_sources = &an2_dig16_sbus_trigger_sources,
 601                 .num_trigger_sources = ARRAY_SIZE(an2_dig16_sbus_trigger_sources),
 602
 603                 .trigger_slopes = &scope_trigger_slopes,
 604                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 605
 606                 .timebases = &timebases,
 607                 .num_timebases = ARRAY_SIZE(timebases),
 608
 609                 .vdivs = &vdivs,
 610                 .num_vdivs = VDIVS_COUNT_UPTO_50V,
 611
 612                 .num_ydivs = 8,
 613
 614                 .scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
 615         },
 616         {
 617                 .name = {"RTB2004", NULL},
 618                 .analog_channels = 4,
 619                 .digital_channels = 16,
 620
 621                 .analog_names = &scope_analog_channel_names,
 622                 .digital_names = &scope_digital_channel_names,
 623
 624                 .devopts = &devopts,
 625                 .num_devopts = ARRAY_SIZE(devopts),
 626
 627                 .devopts_cg_analog = &devopts_cg_analog,
 628                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 629
 630                 .devopts_cg_digital = &devopts_cg_digital,
 631                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 632
 633                 .coupling_options = &coupling_options_rtb200x,
 634                 .num_coupling_options = ARRAY_SIZE(coupling_options_rtb200x),
 635
 636                 .logic_threshold = &logic_threshold_rtb200x_rtm300x,
 637                 .num_logic_threshold = ARRAY_SIZE(logic_threshold_rtb200x_rtm300x),
 638                 .logic_threshold_for_pod = FALSE,
 639
 640                 .trigger_sources = &an4_dig16_sbus_trigger_sources,
 641                 .num_trigger_sources = ARRAY_SIZE(an4_dig16_sbus_trigger_sources),
 642
 643                 .trigger_slopes = &scope_trigger_slopes,
 644                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 645
 646                 .timebases = &timebases,
 647                 .num_timebases = ARRAY_SIZE(timebases),
 648
 649                 .vdivs = &vdivs,
 650                 .num_vdivs = VDIVS_COUNT_UPTO_50V,
 651
 652                 .num_ydivs = 8,
 653
 654                 .scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
 655         },
 656         {
 657                 .name = {"RTM3002", NULL},
 658                 .analog_channels = 2,
 659                 .digital_channels = 16,
 660
 661                 .analog_names = &scope_analog_channel_names,
 662                 .digital_names = &scope_digital_channel_names,
 663
 664                 .devopts = &devopts,
 665                 .num_devopts = ARRAY_SIZE(devopts),
 666
 667                 .devopts_cg_analog = &devopts_cg_analog,
 668                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 669
 670                 .devopts_cg_digital = &devopts_cg_digital,
 671                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 672
 673                 .coupling_options = &coupling_options_rtm300x,
 674                 .num_coupling_options = ARRAY_SIZE(coupling_options_rtm300x),
 675
 676                 .logic_threshold = &logic_threshold_rtb200x_rtm300x,
 677                 .num_logic_threshold = ARRAY_SIZE(logic_threshold_rtb200x_rtm300x),
 678                 .logic_threshold_for_pod = FALSE,
 679
 680                 .trigger_sources = &an2_dig16_sbus_trigger_sources,
 681                 .num_trigger_sources = ARRAY_SIZE(an2_dig16_sbus_trigger_sources),
 682
 683                 .trigger_slopes = &scope_trigger_slopes,
 684                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 685
 686                 .timebases = &timebases,
 687                 .num_timebases = ARRAY_SIZE(timebases),
 688
 689                 .vdivs = &vdivs,
 690                 .num_vdivs = VDIVS_COUNT_UPTO_10V,
 691
 692                 .num_ydivs = 8,
 693
 694                 .scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
 695         },
 696         {
 697                 .name = {"RTM3004", NULL},
 698                 .analog_channels = 4,
 699                 .digital_channels = 16,
 700
 701                 .analog_names = &scope_analog_channel_names,
 702                 .digital_names = &scope_digital_channel_names,
 703
 704                 .devopts = &devopts,
 705                 .num_devopts = ARRAY_SIZE(devopts),
 706
 707                 .devopts_cg_analog = &devopts_cg_analog,
 708                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 709
 710                 .devopts_cg_digital = &devopts_cg_digital,
 711                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 712
 713                 .coupling_options = &coupling_options_rtm300x,
 714                 .num_coupling_options = ARRAY_SIZE(coupling_options_rtm300x),
 715
 716                 .logic_threshold = &logic_threshold_rtb200x_rtm300x,
 717                 .num_logic_threshold = ARRAY_SIZE(logic_threshold_rtb200x_rtm300x),
 718                 .logic_threshold_for_pod = FALSE,
 719
 720                 .trigger_sources = &an4_dig16_sbus_trigger_sources,
 721                 .num_trigger_sources = ARRAY_SIZE(an4_dig16_sbus_trigger_sources),
 722
 723                 .trigger_slopes = &scope_trigger_slopes,
 724                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 725
 726                 .timebases = &timebases,
 727                 .num_timebases = ARRAY_SIZE(timebases),
 728
 729                 .vdivs = &vdivs,
 730                 .num_vdivs = VDIVS_COUNT_UPTO_10V,
 731
 732                 .num_ydivs = 8,
 733
 734                 .scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
 735         },
 736         {
 737                 .name = {"RTA4004", NULL},
 738                 .analog_channels = 4,
 739                 .digital_channels = 16,
 740
 741                 .analog_names = &scope_analog_channel_names,
 742                 .digital_names = &scope_digital_channel_names,
 743
 744                 .devopts = &devopts,
 745                 .num_devopts = ARRAY_SIZE(devopts),
 746
 747                 .devopts_cg_analog = &devopts_cg_analog,
 748                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 749
 750                 .devopts_cg_digital = &devopts_cg_digital,
 751                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 752
 753                 .coupling_options = &coupling_options_rtm300x,
 754                 .num_coupling_options = ARRAY_SIZE(coupling_options_rtm300x),
 755
 756                 .logic_threshold = &logic_threshold_rtb200x_rtm300x,
 757                 .num_logic_threshold = ARRAY_SIZE(logic_threshold_rtb200x_rtm300x),
 758                 .logic_threshold_for_pod = FALSE,
 759
 760                 .trigger_sources = &an4_dig16_sbus_trigger_sources,
 761                 .num_trigger_sources = ARRAY_SIZE(an4_dig16_sbus_trigger_sources),
 762
 763                 .trigger_slopes = &scope_trigger_slopes,
 764                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 765
 766                 .timebases = &timebases,
 767                 .num_timebases = ARRAY_SIZE(timebases),
 768
 769                 .vdivs = &vdivs,
 770                 .num_vdivs = VDIVS_COUNT_UPTO_10V,
 771
 772                 .num_ydivs = 8,
 773
 774                 .scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
 775         },
 776         {
 777                 .name = {"RTH1002", NULL},
 778                 .analog_channels = 2,
 779                 .digital_channels = 8,
 780
 781                 .analog_names = &scope_analog_channel_names,
 782                 .digital_names = &scope_digital_channel_names,
 783
 784                 .devopts = &devopts,
 785                 .num_devopts = ARRAY_SIZE(devopts),
 786
 787                 .devopts_cg_analog = &devopts_cg_analog,
 788                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 789
 790                 .devopts_cg_digital = &devopts_cg_digital,
 791                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 792
 793                 .coupling_options = &coupling_options_rth100x,
 794                 .num_coupling_options = ARRAY_SIZE(coupling_options_rth100x),
 795
 796                 .logic_threshold = &logic_threshold,
 797                 .num_logic_threshold = ARRAY_SIZE(logic_threshold),
 798                 .logic_threshold_for_pod = TRUE,
 799
 800                 .trigger_sources = &an2_dig8_isol_trigger_sources,
 801                 .num_trigger_sources = ARRAY_SIZE(an2_dig8_isol_trigger_sources),
 802
 803                 .trigger_slopes = &scope_trigger_slopes,
 804                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 805
 806                 .timebases = &timebases,
 807                 .num_timebases = ARRAY_SIZE(timebases),
 808
 809                 .vdivs = &vdivs,
 810                 .num_vdivs = ARRAY_SIZE(vdivs),
 811
 812                 .num_ydivs = 8,
 813
 814                 .scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
 815         },
 816         {
 817                 .name = {"RTH1004", NULL},
 818                 .analog_channels = 4,
 819                 .digital_channels = 8,
 820
 821                 .analog_names = &scope_analog_channel_names,
 822                 .digital_names = &scope_digital_channel_names,
 823
 824                 .devopts = &devopts,
 825                 .num_devopts = ARRAY_SIZE(devopts),
 826
 827                 .devopts_cg_analog = &devopts_cg_analog,
 828                 .num_devopts_cg_analog = ARRAY_SIZE(devopts_cg_analog),
 829
 830                 .devopts_cg_digital = &devopts_cg_digital,
 831                 .num_devopts_cg_digital = ARRAY_SIZE(devopts_cg_digital),
 832
 833                 .coupling_options = &coupling_options_rth100x,
 834                 .num_coupling_options = ARRAY_SIZE(coupling_options_rth100x),
 835
 836                 .logic_threshold = &logic_threshold,
 837                 .num_logic_threshold = ARRAY_SIZE(logic_threshold),
 838                 .logic_threshold_for_pod = TRUE,
 839
 840                 .trigger_sources = &an4_dig8_isol_trigger_sources,
 841                 .num_trigger_sources = ARRAY_SIZE(an4_dig8_isol_trigger_sources),
 842
 843                 .trigger_slopes = &scope_trigger_slopes,
 844                 .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes),
 845
 846                 .timebases = &timebases,
 847                 .num_timebases = ARRAY_SIZE(timebases),
 848
 849                 .vdivs = &vdivs,
 850                 .num_vdivs = ARRAY_SIZE(vdivs),
 851
 852                 .num_ydivs = 8,
 853
 854                 .scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
 855         },
 856 };
 857
 858 static void scope_state_dump(const struct scope_config *config,
 859                              struct scope_state *state)
 860 {
 861         unsigned int i;
 862         char *tmp;
 863
 864         for (i = 0; i < config->analog_channels; i++) {
 865                 tmp = sr_voltage_string((*config->vdivs)[state->analog_channels[i].vdiv][0],
 866                                              (*config->vdivs)[state->analog_channels[i].vdiv][1]);
 867                 sr_info("State of analog channel %d -> %s : %s (coupling) %s (vdiv) %2.2e (offset)",
 868                         i + 1, state->analog_channels[i].state ? "On" : "Off",
 869                         (*config->coupling_options)[state->analog_channels[i].coupling],
 870                         tmp, state->analog_channels[i].vertical_offset);
 871         }
 872
 873         for (i = 0; i < config->digital_channels; i++) {
 874                 sr_info("State of digital channel %d -> %s", i,
 875                         state->digital_channels[i] ? "On" : "Off");
 876         }
 877
 878         for (i = 0; i < config->digital_pods; i++) {
 879                 if (!strncmp("USER", (*config->logic_threshold)[state->digital_pods[i].threshold], 4) ||
 880                     !strcmp("MAN", (*config->logic_threshold)[state->digital_pods[i].threshold]))
 881                         sr_info("State of digital POD %d -> %s : %E (threshold)", i + 1,
 882                                 state->digital_pods[i].state ? "On" : "Off",
 883                                 state->digital_pods[i].user_threshold);
 884                 else
 885                         sr_info("State of digital POD %d -> %s : %s (threshold)", i + 1,
 886                                 state->digital_pods[i].state ? "On" : "Off",
 887                                 (*config->logic_threshold)[state->digital_pods[i].threshold]);
 888         }
 889
 890         tmp = sr_period_string((*config->timebases)[state->timebase][0],
 891                                (*config->timebases)[state->timebase][1]);
 892         sr_info("Current timebase: %s", tmp);
 893         g_free(tmp);
 894
 895         tmp = sr_samplerate_string(state->sample_rate);
 896         sr_info("Current samplerate: %s", tmp);
 897         g_free(tmp);
 898
 899         if (!strcmp("PATT", (*config->trigger_sources)[state->trigger_source]))
 900                 sr_info("Current trigger: %s (pattern), %.2f (offset)",
 901                         state->trigger_pattern,
 902                         state->horiz_triggerpos);
 903         else // Edge (slope) trigger
 904                 sr_info("Current trigger: %s (source), %s (slope) %.2f (offset)",
 905                         (*config->trigger_sources)[state->trigger_source],
 906                         (*config->trigger_slopes)[state->trigger_slope],
 907                         state->horiz_triggerpos);
 908 }
 909
 910 static int scope_state_get_array_option(struct sr_scpi_dev_inst *scpi,
 911                 const char *command, const char *(*array)[], unsigned int n, int *result)
 912 {
 913         char *tmp;
 914         int idx;
 915
 916         if (sr_scpi_get_string(scpi, command, &tmp) != SR_OK)
 917                 return SR_ERR;
 918
 919         if ((idx = std_str_idx_s(tmp, *array, n)) < 0) {
 920                 g_free(tmp);
 921                 return SR_ERR_ARG;
 922         }
 923
 924         *result = idx;
 925
 926         g_free(tmp);
 927
 928         return SR_OK;
 929 }
 930
 931 /**
 932  * This function takes a value of the form "2.000E-03" and returns the index
 933  * of an array where a matching pair was found.
 934  *
 935  * @param value The string to be parsed.
 936  * @param array The array of s/f pairs.
 937  * @param array_len The number of pairs in the array.
 938  * @param result The index at which a matching pair was found.
 939  *
 940  * @return SR_ERR on any parsing error, SR_OK otherwise.
 941  */
 942 static int array_float_get(gchar *value, const uint64_t array[][2],
 943                 int array_len, unsigned int *result)
 944 {
 945         struct sr_rational rval;
 946         struct sr_rational aval;
 947
 948         if (sr_parse_rational(value, &rval) != SR_OK)
 949                 return SR_ERR;
 950
 951         for (int i = 0; i < array_len; i++) {
 952                 sr_rational_set(&aval, array[i][0], array[i][1]);
 953                 if (sr_rational_eq(&rval, &aval)) {
 954                         *result = i;
 955                         return SR_OK;
 956                 }
 957         }
 958
 959         return SR_ERR;
 960 }
 961
 962 static struct sr_channel *get_channel_by_index_and_type(GSList *channel_lhead,
 963                                                         int index, int type)
 964 {
 965         while (channel_lhead) {
 966                 struct sr_channel *ch = channel_lhead->data;
 967                 if (ch->index == index && ch->type == type)
 968                         return ch;
 969
 970                 channel_lhead = channel_lhead->next;
 971         }
 972
 973         return 0;
 974 }
 975
 976 static int analog_channel_state_get(struct sr_dev_inst *sdi,
 977                                     const struct scope_config *config,
 978                                     struct scope_state *state)
 979 {
 980         unsigned int i, j;
 981         char command[MAX_COMMAND_SIZE];
 982         char *tmp_str;
 983         struct sr_channel *ch;
 984         struct sr_scpi_dev_inst *scpi = sdi->conn;
 985
 986         for (i = 0; i < config->analog_channels; i++) {
 987                 g_snprintf(command, sizeof(command),
 988                            (*config->scpi_dialect)[SCPI_CMD_GET_ANALOG_CHAN_STATE],
 989                            i + 1);
 990
 991                 if (sr_scpi_get_bool(scpi, command,
 992                                      &state->analog_channels[i].state) != SR_OK)
 993                         return SR_ERR;
 994
 995                 ch = get_channel_by_index_and_type(sdi->channels, i, SR_CHANNEL_ANALOG);
 996                 if (ch)
 997                         ch->enabled = state->analog_channels[i].state;
 998
 999                 g_snprintf(command, sizeof(command),
1000                            (*config->scpi_dialect)[SCPI_CMD_GET_VERTICAL_SCALE],
1001                            i + 1);
1002
1003                 if (sr_scpi_get_string(scpi, command, &tmp_str) != SR_OK)
1004                         return SR_ERR;
1005
1006                 if (array_float_get(tmp_str, *(config->vdivs), config->num_vdivs, &j) != SR_OK) {
1007                         g_free(tmp_str);
1008                         sr_err("Could not determine array index for vertical div scale.");
1009                         return SR_ERR;
1010                 }
1011
1012                 g_free(tmp_str);
1013                 state->analog_channels[i].vdiv = j;
1014
1015                 g_snprintf(command, sizeof(command),
1016                            (*config->scpi_dialect)[SCPI_CMD_GET_VERTICAL_OFFSET],
1017                            i + 1);
1018
1019                 if (sr_scpi_get_float(scpi, command,
1020                                      &state->analog_channels[i].vertical_offset) != SR_OK)
1021                         return SR_ERR;
1022
1023                 g_snprintf(command, sizeof(command),
1024                            (*config->scpi_dialect)[SCPI_CMD_GET_COUPLING],
1025                            i + 1);
1026
1027                 if (scope_state_get_array_option(scpi, command, config->coupling_options,
1028                                          config->num_coupling_options,
1029                                          &state->analog_channels[i].coupling) != SR_OK)
1030                         return SR_ERR;
1031
1032                 g_snprintf(command, sizeof(command),
1033                            (*config->scpi_dialect)[SCPI_CMD_GET_PROBE_UNIT],
1034                            i + 1);
1035
1036                 if (sr_scpi_get_string(scpi, command, &tmp_str) != SR_OK)
1037                         return SR_ERR;
1038
1039                 if (tmp_str[0] == 'A')
1040                         state->analog_channels[i].probe_unit = 'A';
1041                 else
1042                         state->analog_channels[i].probe_unit = 'V';
1043                 g_free(tmp_str);
1044         }
1045
1046         return SR_OK;
1047 }
1048
1049 static int digital_channel_state_get(struct sr_dev_inst *sdi,
1050                                      const struct scope_config *config,
1051                                      struct scope_state *state)
1052 {
1053         unsigned int i, idx;
1054         int result = SR_ERR;
1055         char *logic_threshold_short[MAX_NUM_LOGIC_THRESHOLD_ENTRIES];
1056         char command[MAX_COMMAND_SIZE];
1057         struct sr_channel *ch;
1058         struct sr_scpi_dev_inst *scpi = sdi->conn;
1059
1060         for (i = 0; i < config->digital_channels; i++) {
1061                 g_snprintf(command, sizeof(command),
1062                            (*config->scpi_dialect)[SCPI_CMD_GET_DIG_CHAN_STATE],
1063                            i);
1064
1065                 if (sr_scpi_get_bool(scpi, command,
1066                                      &state->digital_channels[i]) != SR_OK)
1067                         return SR_ERR;
1068
1069                 ch = get_channel_by_index_and_type(sdi->channels, i, SR_CHANNEL_LOGIC);
1070                 if (ch)
1071                         ch->enabled = state->digital_channels[i];
1072         }
1073
1074         /* According to the SCPI standard, on models that support multiple
1075          * user-defined logic threshold settings the response to the command
1076          * SCPI_CMD_GET_DIG_POD_THRESHOLD might return "USER" instead of
1077          * "USER1".
1078          *
1079          * This makes more difficult to validate the response when the logic
1080          * threshold is set to "USER1" and therefore we need to prevent device
1081          * opening failures in such configuration case...
1082          */
1083         for (i = 0; i < config->num_logic_threshold; i++) {
1084                 logic_threshold_short[i] = g_strdup((*config->logic_threshold)[i]);
1085                 if (!strcmp("USER1", (*config->logic_threshold)[i]))
1086                         g_strlcpy(logic_threshold_short[i],
1087                                   (*config->logic_threshold)[i], strlen((*config->logic_threshold)[i]));
1088         }
1089
1090         for (i = 0; i < config->digital_pods; i++) {
1091                 g_snprintf(command, sizeof(command),
1092                            (*config->scpi_dialect)[SCPI_CMD_GET_DIG_POD_STATE],
1093                            i + 1);
1094
1095                 if (sr_scpi_get_bool(scpi, command,
1096                                      &state->digital_pods[i].state) != SR_OK)
1097                         goto exit;
1098
1099                 /* Check if the threshold command is based on the POD or digital channel index. */
1100                 if (config->logic_threshold_for_pod)
1101                         idx = i + 1;
1102                 else
1103                         idx = i * DIGITAL_CHANNELS_PER_POD;
1104
1105                 g_snprintf(command, sizeof(command),
1106                            (*config->scpi_dialect)[SCPI_CMD_GET_DIG_POD_THRESHOLD],
1107                            idx);
1108
1109                 /* Check for both standard and shortened responses. */
1110                 if (scope_state_get_array_option(scpi, command, config->logic_threshold,
1111                                                  config->num_logic_threshold,
1112                                                  &state->digital_pods[i].threshold) != SR_OK)
1113                         if (scope_state_get_array_option(scpi, command, (const char * (*)[]) &logic_threshold_short,
1114                                                          config->num_logic_threshold,
1115                                                          &state->digital_pods[i].threshold) != SR_OK)
1116                                 goto exit;
1117
1118                 /* If used-defined or custom threshold is active, get the level. */
1119                 if (!strcmp("USER1", (*config->logic_threshold)[state->digital_pods[i].threshold]))
1120                         g_snprintf(command, sizeof(command),
1121                                    (*config->scpi_dialect)[SCPI_CMD_GET_DIG_POD_USER_THRESHOLD],
1122                                    idx, 1); /* USER1 logic threshold setting. */
1123                 else if (!strcmp("USER2", (*config->logic_threshold)[state->digital_pods[i].threshold]))
1124                         g_snprintf(command, sizeof(command),
1125                                    (*config->scpi_dialect)[SCPI_CMD_GET_DIG_POD_USER_THRESHOLD],
1126                                    idx, 2); /* USER2 for custom logic_threshold setting. */
1127                 else if (!strcmp("USER", (*config->logic_threshold)[state->digital_pods[i].threshold]) ||
1128                          !strcmp("MAN", (*config->logic_threshold)[state->digital_pods[i].threshold]))
1129                         g_snprintf(command, sizeof(command),
1130                                    (*config->scpi_dialect)[SCPI_CMD_GET_DIG_POD_USER_THRESHOLD],
1131                                    idx); /* USER or MAN for custom logic_threshold setting. */
1132                 if (!strcmp("USER1", (*config->logic_threshold)[state->digital_pods[i].threshold]) ||
1133                     !strcmp("USER2", (*config->logic_threshold)[state->digital_pods[i].threshold]) ||
1134                     !strcmp("USER", (*config->logic_threshold)[state->digital_pods[i].threshold]) ||
1135                     !strcmp("MAN", (*config->logic_threshold)[state->digital_pods[i].threshold]))
1136                         if (sr_scpi_get_float(scpi, command,
1137                             &state->digital_pods[i].user_threshold) != SR_OK)
1138                                 goto exit;
1139         }
1140
1141         result = SR_OK;
1142
1143 exit:
1144         for (i = 0; i < config->num_logic_threshold; i++)
1145                 g_free(logic_threshold_short[i]);
1146
1147         return result;
1148 }
1149
1150 SR_PRIV int hmo_update_sample_rate(const struct sr_dev_inst *sdi)
1151 {
1152         struct dev_context *devc;
1153         struct scope_state *state;
1154         const struct scope_config *config;
1155         float tmp_float;
1156
1157         devc = sdi->priv;
1158         config = devc->model_config;
1159         state = devc->model_state;
1160
1161         if (sr_scpi_get_float(sdi->conn,
1162                               (*config->scpi_dialect)[SCPI_CMD_GET_SAMPLE_RATE],
1163                               &tmp_float) != SR_OK)
1164                 return SR_ERR;
1165
1166         state->sample_rate = tmp_float;
1167
1168         return SR_OK;
1169 }
1170
1171 SR_PRIV int hmo_scope_state_get(struct sr_dev_inst *sdi)
1172 {
1173         struct dev_context *devc;
1174         struct scope_state *state;
1175         const struct scope_config *config;
1176         float tmp_float;
1177         unsigned int i;
1178         char *tmp_str;
1179
1180         devc = sdi->priv;
1181         config = devc->model_config;
1182         state = devc->model_state;
1183
1184         sr_info("Fetching scope state");
1185
1186         if (analog_channel_state_get(sdi, config, state) != SR_OK)
1187                 return SR_ERR;
1188
1189         if (digital_channel_state_get(sdi, config, state) != SR_OK)
1190                 return SR_ERR;
1191
1192         if (sr_scpi_get_string(sdi->conn,
1193                         (*config->scpi_dialect)[SCPI_CMD_GET_TIMEBASE],
1194                         &tmp_str) != SR_OK)
1195                 return SR_ERR;
1196
1197         if (array_float_get(tmp_str, ARRAY_AND_SIZE(timebases), &i) != SR_OK) {
1198                 g_free(tmp_str);
1199                 sr_err("Could not determine array index for time base.");
1200                 return SR_ERR;
1201         }
1202         g_free(tmp_str);
1203
1204         state->timebase = i;
1205
1206         /* Determine the number of horizontal (x) divisions. */
1207         if (sr_scpi_get_int(sdi->conn,
1208             (*config->scpi_dialect)[SCPI_CMD_GET_HORIZONTAL_DIV],
1209             (int *)&config->num_xdivs) != SR_OK)
1210                 return SR_ERR;
1211
1212         if (sr_scpi_get_float(sdi->conn,
1213                         (*config->scpi_dialect)[SCPI_CMD_GET_HORIZ_TRIGGERPOS],
1214                         &tmp_float) != SR_OK)
1215                 return SR_ERR;
1216         state->horiz_triggerpos = tmp_float /
1217                 (((double) (*config->timebases)[state->timebase][0] /
1218                   (*config->timebases)[state->timebase][1]) * config->num_xdivs);
1219         state->horiz_triggerpos -= 0.5;
1220         state->horiz_triggerpos *= -1;
1221
1222         if (scope_state_get_array_option(sdi->conn,
1223                         (*config->scpi_dialect)[SCPI_CMD_GET_TRIGGER_SOURCE],
1224                         config->trigger_sources, config->num_trigger_sources,
1225                         &state->trigger_source) != SR_OK)
1226                 return SR_ERR;
1227
1228         if (scope_state_get_array_option(sdi->conn,
1229                         (*config->scpi_dialect)[SCPI_CMD_GET_TRIGGER_SLOPE],
1230                         config->trigger_slopes, config->num_trigger_slopes,
1231                         &state->trigger_slope) != SR_OK)
1232                 return SR_ERR;
1233
1234         if (sr_scpi_get_string(sdi->conn,
1235                                (*config->scpi_dialect)[SCPI_CMD_GET_TRIGGER_PATTERN],
1236                                &tmp_str) != SR_OK)
1237                 return SR_ERR;
1238         strncpy(state->trigger_pattern,
1239                 sr_scpi_unquote_string(tmp_str),
1240                 MAX_ANALOG_CHANNEL_COUNT + MAX_DIGITAL_CHANNEL_COUNT);
1241         g_free(tmp_str);
1242
1243         if (sr_scpi_get_string(sdi->conn,
1244                              (*config->scpi_dialect)[SCPI_CMD_GET_HIGH_RESOLUTION],
1245                              &tmp_str) != SR_OK)
1246                 return SR_ERR;
1247         if (!strcmp("OFF", tmp_str))
1248                 state->high_resolution = FALSE;
1249         else
1250                 state->high_resolution = TRUE;
1251         g_free(tmp_str);
1252
1253         if (sr_scpi_get_string(sdi->conn,
1254                              (*config->scpi_dialect)[SCPI_CMD_GET_PEAK_DETECTION],
1255                              &tmp_str) != SR_OK)
1256                 return SR_ERR;
1257         if (!strcmp("OFF", tmp_str))
1258                 state->peak_detection = FALSE;
1259         else
1260                 state->peak_detection = TRUE;
1261         g_free(tmp_str);
1262
1263         if (hmo_update_sample_rate(sdi) != SR_OK)
1264                 return SR_ERR;
1265
1266         sr_info("Fetching finished.");
1267
1268         scope_state_dump(config, state);
1269
1270         return SR_OK;
1271 }
1272
1273 static struct scope_state *scope_state_new(const struct scope_config *config)
1274 {
1275         struct scope_state *state;
1276
1277         state = g_malloc0(sizeof(struct scope_state));
1278         state->analog_channels = g_malloc0_n(config->analog_channels,
1279                         sizeof(struct analog_channel_state));
1280         state->digital_channels = g_malloc0_n(
1281                         config->digital_channels, sizeof(gboolean));
1282         state->digital_pods = g_malloc0_n(config->digital_pods,
1283                         sizeof(struct digital_pod_state));
1284
1285         return state;
1286 }
1287
1288 SR_PRIV void hmo_scope_state_free(struct scope_state *state)
1289 {
1290         g_free(state->analog_channels);
1291         g_free(state->digital_channels);
1292         g_free(state->digital_pods);
1293         g_free(state);
1294 }
1295
1296 SR_PRIV int hmo_init_device(struct sr_dev_inst *sdi)
1297 {
1298         int model_index;
1299         unsigned int i, j, group;
1300         struct sr_channel *ch;
1301         struct dev_context *devc;
1302         const char *cg_name;
1303         int ret;
1304
1305         devc = sdi->priv;
1306         model_index = -1;
1307
1308         /* Find the exact model. */
1309         for (i = 0; i < ARRAY_SIZE(scope_models); i++) {
1310                 for (j = 0; scope_models[i].name[j]; j++) {
1311                         if (!strcmp(sdi->model, scope_models[i].name[j])) {
1312                                 model_index = i;
1313                                 break;
1314                         }
1315                 }
1316                 if (model_index != -1)
1317                         break;
1318         }
1319
1320         if (model_index == -1) {
1321                 sr_dbg("Unsupported device.");
1322                 return SR_ERR_NA;
1323         }
1324
1325         /* Configure the number of PODs given the number of digital channels. */
1326         scope_models[model_index].digital_pods = scope_models[model_index].digital_channels / DIGITAL_CHANNELS_PER_POD;
1327
1328         devc->analog_groups = g_malloc0(sizeof(struct sr_channel_group*) *
1329                                         scope_models[model_index].analog_channels);
1330         devc->digital_groups = g_malloc0(sizeof(struct sr_channel_group*) *
1331                                          scope_models[model_index].digital_pods);
1332         if (!devc->analog_groups || !devc->digital_groups) {
1333                 g_free(devc->analog_groups);
1334                 g_free(devc->digital_groups);
1335                 return SR_ERR_MALLOC;
1336         }
1337
1338         /* Add analog channels. */
1339         for (i = 0; i < scope_models[model_index].analog_channels; i++) {
1340                 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE,
1341                            (*scope_models[model_index].analog_names)[i]);
1342
1343                 cg_name = (*scope_models[model_index].analog_names)[i];
1344                 devc->analog_groups[i] = sr_channel_group_new(sdi, cg_name, NULL);
1345                 devc->analog_groups[i]->channels = g_slist_append(NULL, ch);
1346         }
1347
1348         /* Add digital channel groups. */
1349         ret = SR_OK;
1350         for (i = 0; i < scope_models[model_index].digital_pods; i++) {
1351                 devc->digital_groups[i] = sr_channel_group_new(sdi, NULL, NULL);
1352                 if (!devc->digital_groups[i]) {
1353                         ret = SR_ERR_MALLOC;
1354                         break;
1355                 }
1356                 devc->digital_groups[i]->name = g_strdup_printf("POD%d", i + 1);
1357         }
1358         if (ret != SR_OK)
1359                 return ret;
1360
1361         /* Add digital channels. */
1362         for (i = 0; i < scope_models[model_index].digital_channels; i++) {
1363                 ch = sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
1364                            (*scope_models[model_index].digital_names)[i]);
1365
1366                 group = i / DIGITAL_CHANNELS_PER_POD;
1367                 devc->digital_groups[group]->channels = g_slist_append(
1368                         devc->digital_groups[group]->channels, ch);
1369         }
1370
1371         devc->model_config = &scope_models[model_index];
1372         devc->samples_limit = 0;
1373         devc->frame_limit = 0;
1374
1375         if (!(devc->model_state = scope_state_new(devc->model_config)))
1376                 return SR_ERR_MALLOC;
1377
1378         return SR_OK;
1379 }
1380
1381 /* Queue data of one channel group, for later submission. */
1382 SR_PRIV void hmo_queue_logic_data(struct dev_context *devc,
1383                                   size_t group, GByteArray *pod_data)
1384 {
1385         size_t size;
1386         GByteArray *store;
1387         uint8_t *logic_data;
1388         size_t idx, logic_step;
1389
1390         /*
1391          * Upon first invocation, allocate the array which can hold the
1392          * combined logic data for all channels. Assume that each channel
1393          * will yield an identical number of samples per receive call.
1394          *
1395          * As a poor man's safety measure: (Silently) skip processing
1396          * for unexpected sample counts, and ignore samples for
1397          * unexpected channel groups. Don't bother with complicated
1398          * resize logic, considering that many models only support one
1399          * pod, and the most capable supported models have two pods of
1400          * identical size. We haven't yet seen any "odd" configuration.
1401          */
1402         if (!devc->logic_data) {
1403                 size = pod_data->len * devc->pod_count;
1404                 store = g_byte_array_sized_new(size);
1405                 memset(store->data, 0, size);
1406                 store = g_byte_array_set_size(store, size);
1407                 devc->logic_data = store;
1408         } else {
1409                 store = devc->logic_data;
1410                 size = store->len / devc->pod_count;
1411                 if (group >= devc->pod_count)
1412                         return;
1413         }
1414
1415         /*
1416          * Fold the data of the most recently received channel group into
1417          * the storage, where data resides for all channels combined.
1418          */
1419         logic_data = store->data;
1420         logic_data += group;
1421         logic_step = devc->pod_count;
1422         for (idx = 0; idx < pod_data->len; idx++) {
1423                 *logic_data = pod_data->data[idx];
1424                 logic_data += logic_step;
1425         }
1426
1427         /* Truncate acquisition if a smaller number of samples has been requested. */
1428         if (devc->samples_limit > 0 && devc->logic_data->len > devc->samples_limit * devc->pod_count)
1429                 devc->logic_data->len = devc->samples_limit * devc->pod_count;
1430 }
1431
1432 /* Submit data for all channels, after the individual groups got collected. */
1433 SR_PRIV void hmo_send_logic_packet(struct sr_dev_inst *sdi,
1434                                    struct dev_context *devc)
1435 {
1436         struct sr_datafeed_packet packet;
1437         struct sr_datafeed_logic logic;
1438
1439         if (!devc->logic_data)
1440                 return;
1441
1442         logic.data = devc->logic_data->data;
1443         logic.length = devc->logic_data->len;
1444         logic.unitsize = devc->pod_count;
1445
1446         packet.type = SR_DF_LOGIC;
1447         packet.payload = &logic;
1448
1449         sr_session_send(sdi, &packet);
1450 }
1451
1452 /* Undo previous resource allocation. */
1453 SR_PRIV void hmo_cleanup_logic_data(struct dev_context *devc)
1454 {
1455
1456         if (devc->logic_data) {
1457                 g_byte_array_free(devc->logic_data, TRUE);
1458                 devc->logic_data = NULL;
1459         }
1460         /*
1461          * Keep 'pod_count'! It's required when more frames will be
1462          * received, and does not harm when kept after acquisition.
1463          */
1464 }
1465
1466 SR_PRIV int hmo_receive_data(int fd, int revents, void *cb_data)
1467 {
1468         struct sr_channel *ch;
1469         struct sr_dev_inst *sdi;
1470         struct dev_context *devc;
1471         struct scope_state *state;
1472         struct sr_datafeed_packet packet;
1473         GByteArray *data;
1474         struct sr_datafeed_analog analog;
1475         struct sr_analog_encoding encoding;
1476         struct sr_analog_meaning meaning;
1477         struct sr_analog_spec spec;
1478         struct sr_datafeed_logic logic;
1479         size_t group;
1480
1481         (void)fd;
1482         (void)revents;
1483
1484         if (!(sdi = cb_data))
1485                 return TRUE;
1486
1487         if (!(devc = sdi->priv))
1488                 return TRUE;
1489
1490         /* Although this is correct in general, the USBTMC libusb implementation
1491          * currently does not generate an event prior to the first read. Often
1492          * it is ok to start reading just after the 50ms timeout. See bug #785.
1493         if (revents != G_IO_IN)
1494                 return TRUE;
1495         */
1496
1497         ch = devc->current_channel->data;
1498         state = devc->model_state;
1499
1500         /*
1501          * Send "frame begin" packet upon reception of data for the
1502          * first enabled channel.
1503          */
1504         if (devc->current_channel == devc->enabled_channels)
1505                 std_session_send_df_frame_begin(sdi);
1506
1507         /*
1508          * Pass on the received data of the channel(s).
1509          */
1510         switch (ch->type) {
1511         case SR_CHANNEL_ANALOG:
1512                 data = NULL;
1513                 if (sr_scpi_get_block(sdi->conn, NULL, &data) != SR_OK) {
1514                         if (data)
1515                                 g_byte_array_free(data, TRUE);
1516                         return TRUE;
1517                 }
1518
1519                 packet.type = SR_DF_ANALOG;
1520
1521                 analog.data = data->data;
1522                 analog.num_samples = data->len / sizeof(float);
1523                 /* Truncate acquisition if a smaller number of samples has been requested. */
1524                 if (devc->samples_limit > 0 && analog.num_samples > devc->samples_limit)
1525                         analog.num_samples = devc->samples_limit;
1526                 /* TODO: Use proper 'digits' value for this device (and its modes). */
1527                 sr_analog_init(&analog, &encoding, &meaning, &spec, 2);
1528                 encoding.is_signed = TRUE;
1529                 if (state->analog_channels[ch->index].probe_unit == 'V') {
1530                         meaning.mq = SR_MQ_VOLTAGE;
1531                         meaning.unit = SR_UNIT_VOLT;
1532                 } else {
1533                         meaning.mq = SR_MQ_CURRENT;
1534                         meaning.unit = SR_UNIT_AMPERE;
1535                 }
1536                 meaning.channels = g_slist_append(NULL, ch);
1537                 packet.payload = &analog;
1538                 sr_session_send(sdi, &packet);
1539                 devc->num_samples = data->len / sizeof(float);
1540                 g_slist_free(meaning.channels);
1541                 g_byte_array_free(data, TRUE);
1542                 data = NULL;
1543                 break;
1544         case SR_CHANNEL_LOGIC:
1545                 data = NULL;
1546                 if (sr_scpi_get_block(sdi->conn, NULL, &data) != SR_OK) {
1547                         if (data)
1548                                 g_byte_array_free(data, TRUE);
1549                         return TRUE;
1550                 }
1551
1552                 /*
1553                  * If only data from the first pod is involved in the
1554                  * acquisition, then the raw input bytes can get passed
1555                  * forward for performance reasons. When the second pod
1556                  * is involved (either alone, or in combination with the
1557                  * first pod), then the received bytes need to be put
1558                  * into memory in such a layout that all channel groups
1559                  * get combined, and a unitsize larger than a single byte
1560                  * applies. The "queue" logic transparently copes with
1561                  * any such configuration. This works around the lack
1562                  * of support for "meaning" to logic data, which is used
1563                  * above for analog data.
1564                  */
1565                 if (devc->pod_count == 1) {
1566                         packet.type = SR_DF_LOGIC;
1567                         logic.data = data->data;
1568                         logic.length = data->len;
1569                         /* Truncate acquisition if a smaller number of samples has been requested. */
1570                         if (devc->samples_limit > 0 && logic.length > devc->samples_limit)
1571                                 logic.length = devc->samples_limit;
1572                         logic.unitsize = 1;
1573                         packet.payload = &logic;
1574                         sr_session_send(sdi, &packet);
1575                 } else {
1576                         group = ch->index / DIGITAL_CHANNELS_PER_POD;
1577                         hmo_queue_logic_data(devc, group, data);
1578                 }
1579
1580                 devc->num_samples = data->len / devc->pod_count;
1581                 g_byte_array_free(data, TRUE);
1582                 data = NULL;
1583                 break;
1584         default:
1585                 sr_err("Invalid channel type.");
1586                 break;
1587         }
1588
1589         /*
1590          * Advance to the next enabled channel. When data for all enabled
1591          * channels was received, then flush potentially queued logic data,
1592          * and send the "frame end" packet.
1593          */
1594         if (devc->current_channel->next) {
1595                 devc->current_channel = devc->current_channel->next;
1596                 hmo_request_data(sdi);
1597                 return TRUE;
1598         }
1599         hmo_send_logic_packet(sdi, devc);
1600
1601         /*
1602          * Release the logic data storage after each frame. This copes
1603          * with sample counts that differ in length per frame. -- Is
1604          * this a real constraint when acquiring multiple frames with
1605          * identical device settings?
1606          */
1607         hmo_cleanup_logic_data(devc);
1608
1609         std_session_send_df_frame_end(sdi);
1610
1611         /*
1612          * End of frame was reached. Stop acquisition after the specified
1613          * number of frames or after the specified number of samples, or
1614          * continue reception by starting over at the first enabled channel.
1615          */
1616         if (++devc->num_frames >= devc->frame_limit || devc->num_samples >= devc->samples_limit) {
1617                 sr_dev_acquisition_stop(sdi);
1618                 hmo_cleanup_logic_data(devc);
1619         } else {
1620                 devc->current_channel = devc->enabled_channels;
1621                 hmo_request_data(sdi);
1622         }
1623
1624         return TRUE;
1625 }