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lecroy-xstream: Drop prototypes for non-existing functions.
[libsigrok.git] / src / hardware / lecroy-xstream / protocol.c
CommitLineData
e3b83c5e
SS		 1/*
2 * This file is part of the libsigrok project.
3 *
4 * Copyright (C) 2017 Sven Schnelle <svens@stackframe.org>
5 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include <config.h>
3f2c7c94
SS		 21#include <math.h>
22#include <stdlib.h>
23#include "scpi.h"
e3b83c5e
SS		 24#include "protocol.h"
25
3f2c7c94
SS		 26struct lecroy_wavedesc_2_x {
27 uint16_t comm_type;
28 uint16_t comm_order; /* 1 - little endian */
29 uint32_t wave_descriptor_length;
30 uint32_t user_text_len;
31 uint32_t res_desc1;
32 uint32_t trigtime_array_length;
33 uint32_t ris_time1_array_length;
34 uint32_t res_array1;
35 uint32_t wave_array1_length;
36 uint32_t wave_array2_length;
37 uint32_t wave_array3_length;
38 uint32_t wave_array4_length;
39 char instrument_name[16];
40 uint32_t instrument_number;
41 char trace_label[16];
42 uint32_t reserved;
43 uint32_t wave_array_count;
44 uint32_t points_per_screen;
45 uint32_t first_valid_point;
46 uint32_t last_valid_point;
47 uint32_t first_point;
48 uint32_t sparsing_factor;
49 uint32_t segment_index;
50 uint32_t subarray_count;
51 uint32_t sweeps_per_acq;
52 uint16_t points_per_pair;
53 uint16_t pair_offset;
54 float vertical_gain;
55 float vertical_offset;
56 float max_value;
57 float min_value;
58 uint16_t nominal_bits;
59 uint16_t nom_subarray_count;
60 float horiz_interval;
61 double horiz_offset;
62 double pixel_offset;
63 char vertunit[48];
64 char horunit[48];
65 uint32_t reserved1;
66 double trigger_time;
67} __attribute__((packed));
68
69struct lecroy_wavedesc {
70 char descriptor_name[16];
71 char template_name[16];
72 union {
73 struct lecroy_wavedesc_2_x version_2_x;
74 };
75} __attribute__((packed));
76
77static const uint32_t lecroy_devopts[] = {
78 SR_CONF_OSCILLOSCOPE,
79 SR_CONF_LIMIT_FRAMES | SR_CONF_GET | SR_CONF_SET,
80 SR_CONF_TRIGGER_SOURCE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
81 SR_CONF_TIMEBASE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
82 SR_CONF_NUM_HDIV | SR_CONF_GET,
83 SR_CONF_TRIGGER_SLOPE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
84 SR_CONF_HORIZ_TRIGGERPOS | SR_CONF_GET | SR_CONF_SET,
85 SR_CONF_SAMPLERATE | SR_CONF_GET,
86};
87
88static const uint32_t lecroy_analog_devopts[] = {
89 SR_CONF_NUM_VDIV | SR_CONF_GET,
90 SR_CONF_COUPLING | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
91 SR_CONF_VDIV | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
92};
93
94static const char *lecroy_coupling_options[] = {
95 "A1M", // AC with 1 MOhm termination
ea257cdc 96 "D50", // DC with 50 Ohm termination
3f2c7c94
SS		 97 "D1M", // DC with 1 MOhm termination
98 "GND",
99 "OVL",
100 NULL,
101};
102
103static const char *scope_trigger_slopes[] = {
104 "POS",
105 "NEG",
106 NULL,
107};
108
109static const char *lecroy_xstream_trigger_sources[] = {
110 "C1",
111 "C2",
112 "C3",
113 "C4",
114 "LINE",
115 "EXT",
116 NULL,
117};
118
119static const struct sr_rational lecroy_timebases[] = {
120 /* picoseconds */
121 { 20, 1000000000000 },
122 { 50, 1000000000000 },
123 { 100, 1000000000000 },
124 { 200, 1000000000000 },
125 { 500, 1000000000000 },
126 /* nanoseconds */
127 { 1, 1000000000 },
128 { 2, 1000000000 },
129 { 5, 1000000000 },
130 { 10, 1000000000 },
131 { 20, 1000000000 },
132 { 50, 1000000000 },
133 { 100, 1000000000 },
134 { 200, 1000000000 },
135 { 500, 1000000000 },
136 /* microseconds */
137 { 1, 1000000 },
138 { 2, 1000000 },
139 { 5, 1000000 },
140 { 10, 1000000 },
141 { 20, 1000000 },
142 { 50, 1000000 },
143 { 100, 1000000 },
144 { 200, 1000000 },
145 { 500, 1000000 },
146 /* milliseconds */
147 { 1, 1000 },
148 { 2, 1000 },
149 { 5, 1000 },
150 { 10, 1000 },
151 { 20, 1000 },
152 { 50, 1000 },
153 { 100, 1000 },
154 { 200, 1000 },
155 { 500, 1000 },
156 /* seconds */
157 { 1, 1 },
158 { 2, 1 },
159 { 5, 1 },
160 { 10, 1 },
161 { 20, 1 },
162 { 50, 1 },
163 { 100, 1 },
164 { 200, 1 },
165 { 500, 1 },
166 { 1000, 1 },
167};
168
169static const struct sr_rational lecroy_vdivs[] = {
170 /* millivolts */
171 { 1, 1000 },
172 { 2, 1000 },
173 { 5, 1000 },
174 { 10, 1000 },
175 { 20, 1000 },
176 { 50, 1000 },
177 { 100, 1000 },
178 { 200, 1000 },
179 { 500, 1000 },
180 /* volts */
181 { 1, 1 },
182 { 2, 1 },
183 { 5, 1 },
184 { 10, 1 },
185 { 20, 1 },
186 { 50, 1 },
187};
188
189static const char *scope_analog_channel_names[] = {
190 "CH1",
191 "CH2",
192 "CH3",
193 "CH4",
194};
195
196static const struct scope_config scope_models[] = {
197 {
198 .name = { "WP7000", "WP7100", "WP7200", "WP7300" },
199
200 .analog_channels = 4,
201 .analog_names = &scope_analog_channel_names,
202
203 .devopts = &lecroy_devopts,
204 .num_devopts = ARRAY_SIZE(lecroy_devopts),
205
206 .analog_devopts = &lecroy_analog_devopts,
207 .num_analog_devopts = ARRAY_SIZE(lecroy_analog_devopts),
208
209 .coupling_options = &lecroy_coupling_options,
210 .trigger_sources = &lecroy_xstream_trigger_sources,
211 .trigger_slopes = &scope_trigger_slopes,
212
213 .timebases = lecroy_timebases,
214 .num_timebases = ARRAY_SIZE(lecroy_timebases),
215
216 .vdivs = lecroy_vdivs,
217 .num_vdivs = ARRAY_SIZE(lecroy_vdivs),
218
219 .num_xdivs = 10,
220 .num_ydivs = 8,
221 },
222};
223
224static void scope_state_dump(const struct scope_config *config,
225 struct scope_state *state)
226{
227 unsigned int i;
228 char *tmp;
229
230 for (i = 0; i < config->analog_channels; i++) {
231 tmp = sr_voltage_string(config->vdivs[state->analog_channels[i].vdiv].p,
232 config->vdivs[state->analog_channels[i].vdiv].q);
233 sr_info("State of analog channel %d -> %s : %s (coupling) %s (vdiv) %2.2e (offset)",
234 i + 1, state->analog_channels[i].state ? "On" : "Off",
235 (*config->coupling_options)[state->analog_channels[i].coupling],
236 tmp, state->analog_channels[i].vertical_offset);
237 }
238
9de47e9e 239 tmp = sr_period_string(((float)config->timebases[state->timebase].q) /
ea257cdc 240 ((float)config->timebases[state->timebase].p));
3f2c7c94
SS		 241 sr_info("Current timebase: %s", tmp);
242 g_free(tmp);
243
244 tmp = sr_samplerate_string(state->sample_rate);
245 sr_info("Current samplerate: %s", tmp);
246 g_free(tmp);
247
248 sr_info("Current trigger: %s (source), %s (slope) %.2f (offset)",
249 (*config->trigger_sources)[state->trigger_source],
250 (*config->trigger_slopes)[state->trigger_slope],
251 state->horiz_triggerpos);
252}
253
254static int scope_state_get_array_option(const char *resp,
ea257cdc 255 const char *(*array)[], int *result)
3f2c7c94
SS		 256{
257 unsigned int i;
258
259 for (i = 0; (*array)[i]; i++) {
260 if (!g_strcmp0(resp, (*array)[i])) {
261 *result = i;
262 return SR_OK;
263 }
264 }
265
266 return SR_ERR;
267}
268
269/**
270 * This function takes a value of the form "2.000E-03" and returns the index
271 * of an array where a matching pair was found.
272 *
273 * @param value The string to be parsed.
274 * @param array The array of s/f pairs.
275 * @param array_len The number of pairs in the array.
276 * @param result The index at which a matching pair was found.
277 *
278 * @return SR_ERR on any parsing error, SR_OK otherwise.
279 */
280static int array_float_get(gchar *value, const struct sr_rational *aval,
281 int array_len, unsigned int *result)
282{
283 struct sr_rational rval;
284
285 if (sr_parse_rational(value, &rval) != SR_OK)
286 return SR_ERR;
287
288 for (int i = 0; i < array_len; i++) {
ea257cdc 289 if (sr_rational_eq(&rval, aval + i)) {
3f2c7c94
SS		 290 *result = i;
291 return SR_OK;
292 }
293 }
294
295 return SR_ERR;
296}
297
298static int analog_channel_state_get(struct sr_scpi_dev_inst *scpi,
299 const struct scope_config *config,
300 struct scope_state *state)
301{
302 unsigned int i, j;
303 char command[MAX_COMMAND_SIZE];
304 char *tmp_str;
305
306 for (i = 0; i < config->analog_channels; i++) {
ea257cdc 307 g_snprintf(command, sizeof(command), "C%d:TRACE?", i + 1);
3f2c7c94
SS		 308
309 if (sr_scpi_get_bool(scpi, command,
ea257cdc 310 &state->analog_channels[i].state) != SR_OK)
3f2c7c94
SS		 311 return SR_ERR;
312
ea257cdc 313 g_snprintf(command, sizeof(command), "C%d:VDIV?", i + 1);
3f2c7c94
SS		 314
315 if (sr_scpi_get_string(scpi, command, &tmp_str) != SR_OK)
316 return SR_ERR;
317
318 if (array_float_get(tmp_str, lecroy_vdivs, ARRAY_SIZE(lecroy_vdivs),
319 &j) != SR_OK) {
320 g_free(tmp_str);
321 sr_err("Could not determine array index for vertical div scale.");
322 return SR_ERR;
323 }
324
325 g_free(tmp_str);
326 state->analog_channels[i].vdiv = j;
327
ea257cdc 328 g_snprintf(command, sizeof(command), "C%d:OFFSET?", i + 1);
3f2c7c94
SS		 329
330 if (sr_scpi_get_float(scpi, command, &state->analog_channels[i].vertical_offset) != SR_OK)
331 return SR_ERR;
332
ea257cdc 333 g_snprintf(command, sizeof(command), "C%d:COUPLING?", i + 1);
3f2c7c94
SS		 334
335 if (sr_scpi_get_string(scpi, command, &tmp_str) != SR_OK)
336 return SR_ERR;
337
338
339 if (scope_state_get_array_option(tmp_str, config->coupling_options,
ea257cdc 340 &state->analog_channels[i].coupling) != SR_OK)
3f2c7c94
SS		 341 return SR_ERR;
342
343 g_free(tmp_str);
344 }
345
346 return SR_OK;
347}
348
349SR_PRIV int lecroy_xstream_update_sample_rate(const struct sr_dev_inst *sdi)
e3b83c5e 350{
e3b83c5e 351 struct dev_context *devc;
3f2c7c94
SS		 352 struct scope_state *state;
353 const struct scope_config *config;
354 float memsize, timediv;
355
356 devc = sdi->priv;
357 state = devc->model_state;
358 config = devc->model_config;
359
360 if (sr_scpi_get_float(sdi->conn, "MEMORY_SIZE?", &memsize) != SR_OK)
ea257cdc 361 return SR_ERR;
3f2c7c94
SS		 362
363 if (sr_scpi_get_float(sdi->conn, "TIME_DIV?", &timediv) != SR_OK)
364 return SR_ERR;
365
ea257cdc 366 state->sample_rate = 1 / ((timediv * config->num_xdivs) / memsize);
3f2c7c94
SS		 367
368 return SR_OK;
369}
370
371SR_PRIV int lecroy_xstream_state_get(struct sr_dev_inst *sdi)
372{
373 struct dev_context *devc;
ea257cdc
UH		 374 struct scope_state *state;
375 const struct scope_config *config;
3f2c7c94
SS		 376 unsigned int i;
377 char *tmp_str, *tmp_str2, *tmpp, *p, *key;
378 char command[MAX_COMMAND_SIZE];
379 char *trig_source = NULL;
380
381 devc = sdi->priv;
382 config = devc->model_config;
383 state = devc->model_state;
384
385 sr_info("Fetching scope state");
386
387 if (analog_channel_state_get(sdi->conn, config, state) != SR_OK)
388 return SR_ERR;
389
390 if (sr_scpi_get_string(sdi->conn, "TIME_DIV?", &tmp_str) != SR_OK)
391 return SR_ERR;
392
393 if (array_float_get(tmp_str, lecroy_timebases, ARRAY_SIZE(lecroy_timebases),
394 &i) != SR_OK) {
395 g_free(tmp_str);
396 sr_err("Could not determine array index for timbase scale.");
397 return SR_ERR;
398 }
399 g_free(tmp_str);
400 state->timebase = i;
401
402 if (sr_scpi_get_string(sdi->conn, "TRIG_SELECT?", &tmp_str) != SR_OK)
403 return SR_ERR;
404
7002e64a 405 key = tmpp = NULL;
3f2c7c94
SS		 406 tmp_str2 = tmp_str;
407 i = 0;
ea257cdc 408 while ((p = strtok_r(tmp_str2, ",", &tmpp))) {
3f2c7c94
SS		 409 tmp_str2 = NULL;
410 if (i == 0) {
411 /* trigger type */
412 } else if (i & 1) {
413 key = p;
414 /* key */
415 } else if (!(i & 1)) {
416 if (!strcmp(key, "SR"))
417 trig_source = p;
418 }
419 i++;
420 }
421
ea257cdc 422 if (!trig_source || scope_state_get_array_option(trig_source, config->trigger_sources, &state->trigger_source) != SR_OK)
3f2c7c94
SS		 423 return SR_ERR;
424
3f2c7c94
SS		 425 g_snprintf(command, sizeof(command), "%s:TRIG_SLOPE?", trig_source);
426 if (sr_scpi_get_string(sdi->conn, command, &tmp_str) != SR_OK)
427 return SR_ERR;
428
429 if (scope_state_get_array_option(tmp_str,
430 config->trigger_slopes, &state->trigger_slope) != SR_OK)
431 return SR_ERR;
432
433 if (sr_scpi_get_float(sdi->conn, "TRIG_DELAY?", &state->horiz_triggerpos) != SR_OK)
434 return SR_ERR;
435
436 if (lecroy_xstream_update_sample_rate(sdi) != SR_OK)
437 return SR_ERR;
438
439 sr_info("Fetching finished.");
440
441 scope_state_dump(config, state);
442
443 return SR_OK;
444}
445
446static struct scope_state *scope_state_new(const struct scope_config *config)
447{
448 struct scope_state *state;
449
450 state = g_malloc0(sizeof(struct scope_state));
451 state->analog_channels = g_malloc0_n(config->analog_channels,
452 sizeof(struct analog_channel_state));
453 return state;
454}
455
456SR_PRIV void lecroy_xstream_state_free(struct scope_state *state)
457{
458 g_free(state->analog_channels);
459 g_free(state);
460}
461
462SR_PRIV int lecroy_xstream_init_device(struct sr_dev_inst *sdi)
463{
464 char command[MAX_COMMAND_SIZE];
465 int model_index;
466 unsigned int i, j;
467 struct sr_channel *ch;
468 struct dev_context *devc;
469 gboolean channel_enabled;
470
471 devc = sdi->priv;
472 model_index = -1;
473
474 /* Find the exact model. */
475 for (i = 0; i < ARRAY_SIZE(scope_models); i++) {
476 for (j = 0; scope_models[i].name[j]; j++) {
477 if (!strcmp(sdi->model, scope_models[i].name[j])) {
478 model_index = i;
479 break;
480 }
481 }
482 if (model_index != -1)
483 break;
484 }
485
486 if (model_index == -1) {
ea257cdc 487 sr_dbg("Unsupported LeCroy device.");
3f2c7c94
SS		 488 return SR_ERR_NA;
489 }
490
491 devc->analog_groups = g_malloc0(sizeof(struct sr_channel_group*) *
ea257cdc 492 scope_models[model_index].analog_channels);
3f2c7c94
SS		 493
494 /* Add analog channels. */
495 for (i = 0; i < scope_models[model_index].analog_channels; i++) {
ea257cdc 496 g_snprintf(command, sizeof(command), "C%d:TRACE?", i + 1);
3f2c7c94
SS		 497
498 if (sr_scpi_get_bool(sdi->conn, command, &channel_enabled) != SR_OK)
499 return SR_ERR;
500
ea257cdc 501 g_snprintf(command, sizeof(command), "C%d:VDIV?", i + 1);
3f2c7c94
SS		 502
503 ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, channel_enabled,
504 (*scope_models[model_index].analog_names)[i]);
505
506 devc->analog_groups[i] = g_malloc0(sizeof(struct sr_channel_group));
507
508 devc->analog_groups[i]->name = g_strdup(
509 (char *)(*scope_models[model_index].analog_names)[i]);
510 devc->analog_groups[i]->channels = g_slist_append(NULL, ch);
511
512 sdi->channel_groups = g_slist_append(sdi->channel_groups,
513 devc->analog_groups[i]);
514 }
515
516 devc->model_config = &scope_models[model_index];
517 devc->frame_limit = 0;
518
519 if (!(devc->model_state = scope_state_new(devc->model_config)))
520 return SR_ERR_MALLOC;
521
d0b913ea
SA		 522 /* Set the desired response mode. */
523 sr_scpi_send(sdi->conn, "COMM_HEADER OFF,WORD,BIN");
524
3f2c7c94
SS		 525 return SR_OK;
526}
527
528static int lecroy_waveform_2_x_to_analog(GByteArray *data,
529 struct lecroy_wavedesc *desc,
530 struct sr_datafeed_analog *analog)
531{
532 struct sr_analog_encoding *encoding = analog->encoding;
533 struct sr_analog_meaning *meaning = analog->meaning;
534 struct sr_analog_spec *spec = analog->spec;
535 float *data_float;
536 int16_t *waveform_data;
537 unsigned int i, num_samples;
538
ea257cdc 539 data_float = g_malloc(desc->version_2_x.wave_array_count * sizeof(float));
3f2c7c94
SS		 540 num_samples = desc->version_2_x.wave_array_count;
541
542 waveform_data = (int16_t *)(data->data +
543 + desc->version_2_x.wave_descriptor_length
544 + desc->version_2_x.user_text_len);
545
ea257cdc 546 for (i = 0; i < num_samples; i++)
3f2c7c94
SS		 547 data_float[i] = (float)waveform_data[i]
548 * desc->version_2_x.vertical_gain
549 + desc->version_2_x.vertical_offset;
550
3f2c7c94
SS		 551 analog->data = data_float;
552 analog->num_samples = num_samples;
553
554 encoding->unitsize = sizeof(float);
555 encoding->is_signed = TRUE;
556 encoding->is_float = TRUE;
557 encoding->is_bigendian = FALSE;
558 encoding->scale.p = 1;
559 encoding->scale.q = 1;
560 encoding->offset.p = 0;
561 encoding->offset.q = 1;
562
563 encoding->digits = 6;
564 encoding->is_digits_decimal = FALSE;
565
566 if (strcmp(desc->version_2_x.vertunit, "A")) {
567 meaning->mq = SR_MQ_CURRENT;
568 meaning->unit = SR_UNIT_AMPERE;
569 } else {
ea257cdc 570 /* Default to voltage. */
3f2c7c94
SS		 571 meaning->mq = SR_MQ_VOLTAGE;
572 meaning->unit = SR_UNIT_VOLT;
573 }
574
575 meaning->mqflags = 0;
576 spec->spec_digits = 3;
ea257cdc 577
3f2c7c94
SS		 578 return SR_OK;
579}
580
581static int lecroy_waveform_to_analog(GByteArray *data,
582 struct sr_datafeed_analog *analog)
583{
584 struct lecroy_wavedesc *desc;
585
586 if (data->len < sizeof(struct lecroy_wavedesc))
587 return SR_ERR;
588
589 desc = (struct lecroy_wavedesc *)data->data;
590
591 if (!strncmp(desc->template_name, "LECROY_2_2", 16) ||
592 !strncmp(desc->template_name, "LECROY_2_3", 16)) {
593 return lecroy_waveform_2_x_to_analog(data, desc, analog);
594 }
595
ea257cdc
UH		 596 sr_err("Waveformat template '%.16s' not supported.",
597 desc->template_name);
598
3f2c7c94
SS		 599 return SR_ERR;
600}
601
602SR_PRIV int lecroy_xstream_receive_data(int fd, int revents, void *cb_data)
603{
604 struct sr_channel *ch;
605 struct sr_dev_inst *sdi;
606 struct dev_context *devc;
607 struct sr_datafeed_packet packet;
608 GByteArray *data;
609 struct sr_datafeed_analog analog;
610 struct sr_analog_encoding encoding;
611 struct sr_analog_meaning meaning;
612 struct sr_analog_spec spec;
613 char buf[8];
ea257cdc 614
e3b83c5e 615 (void)fd;
3f2c7c94
SS		 616 (void)revents;
617
618 data = NULL;
e3b83c5e
SS		 619
620 if (!(sdi = cb_data))
621 return TRUE;
622
623 if (!(devc = sdi->priv))
624 return TRUE;
625
3f2c7c94
SS		 626 ch = devc->current_channel->data;
627
628 /*
629 * Send "frame begin" packet upon reception of data for the
630 * first enabled channel.
631 */
632 if (devc->current_channel == devc->enabled_channels) {
633 packet.type = SR_DF_FRAME_BEGIN;
634 sr_session_send(sdi, &packet);
635 }
636
637 if (ch->type != SR_CHANNEL_ANALOG)
638 return SR_ERR;
ea257cdc
UH		 639
640 /* Pass on the received data of the channel(s). */
3f2c7c94 641 if (sr_scpi_read_data(sdi->conn, buf, 4) != 4) {
ea257cdc 642 sr_err("Reading header failed.");
3f2c7c94
SS		 643 return TRUE;
644 }
645
646 if (sr_scpi_get_block(sdi->conn, NULL, &data) != SR_OK) {
647 if (data)
648 g_byte_array_free(data, TRUE);
649 return TRUE;
650 }
651
652 analog.encoding = &encoding;
653 analog.meaning = &meaning;
654 analog.spec = &spec;
655
656 if (lecroy_waveform_to_analog(data, &analog) != SR_OK)
657 return SR_ERR;
658
659 meaning.channels = g_slist_append(NULL, ch);
660 packet.payload = &analog;
661 packet.type = SR_DF_ANALOG;
662 sr_session_send(sdi, &packet);
663
664 g_byte_array_free(data, TRUE);
665 data = NULL;
666
667 g_slist_free(meaning.channels);
668 g_free(analog.data);
669
3f2c7c94
SS		 670 /*
671 * Advance to the next enabled channel. When data for all enabled
672 * channels was received, then flush potentially queued logic data,
673 * and send the "frame end" packet.
674 */
675 if (devc->current_channel->next) {
676 devc->current_channel = devc->current_channel->next;
677 lecroy_xstream_request_data(sdi);
678 return TRUE;
679 }
680
681 packet.type = SR_DF_FRAME_END;
682 sr_session_send(sdi, &packet);
683
684 /*
685 * End of frame was reached. Stop acquisition after the specified
686 * number of frames, or continue reception by starting over at
687 * the first enabled channel.
688 */
689 if (++devc->num_frames == devc->frame_limit) {
690 sdi->driver->dev_acquisition_stop(sdi);
691 } else {
692 devc->current_channel = devc->enabled_channels;
693 lecroy_xstream_request_data(sdi);
e3b83c5e
SS		 694 }
695
696 return TRUE;
697}
Hardware access and backend lib