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