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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> | |
21 | #include <math.h> | |
22 | #include <stdlib.h> | |
23 | #include "scpi.h" | |
24 | #include "protocol.h" | |
25 | ||
26 | struct 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 | ||
69 | struct 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 | ||
77 | static const char *coupling_options[] = { | |
78 | "A1M", // AC with 1 MOhm termination | |
79 | "D50", // DC with 50 Ohm termination | |
80 | "D1M", // DC with 1 MOhm termination | |
81 | "GND", | |
82 | "OVL", | |
83 | }; | |
84 | ||
85 | static const char *scope_trigger_slopes[] = { | |
86 | "POS", "NEG", | |
87 | }; | |
88 | ||
89 | static const char *trigger_sources[] = { | |
90 | "C1", "C2", "C3", "C4", "LINE", "EXT", | |
91 | }; | |
92 | ||
93 | static const uint64_t timebases[][2] = { | |
94 | /* picoseconds */ | |
95 | { 20, 1000000000000 }, | |
96 | { 50, 1000000000000 }, | |
97 | { 100, 1000000000000 }, | |
98 | { 200, 1000000000000 }, | |
99 | { 500, 1000000000000 }, | |
100 | /* nanoseconds */ | |
101 | { 1, 1000000000 }, | |
102 | { 2, 1000000000 }, | |
103 | { 5, 1000000000 }, | |
104 | { 10, 1000000000 }, | |
105 | { 20, 1000000000 }, | |
106 | { 50, 1000000000 }, | |
107 | { 100, 1000000000 }, | |
108 | { 200, 1000000000 }, | |
109 | { 500, 1000000000 }, | |
110 | /* microseconds */ | |
111 | { 1, 1000000 }, | |
112 | { 2, 1000000 }, | |
113 | { 5, 1000000 }, | |
114 | { 10, 1000000 }, | |
115 | { 20, 1000000 }, | |
116 | { 50, 1000000 }, | |
117 | { 100, 1000000 }, | |
118 | { 200, 1000000 }, | |
119 | { 500, 1000000 }, | |
120 | /* milliseconds */ | |
121 | { 1, 1000 }, | |
122 | { 2, 1000 }, | |
123 | { 5, 1000 }, | |
124 | { 10, 1000 }, | |
125 | { 20, 1000 }, | |
126 | { 50, 1000 }, | |
127 | { 100, 1000 }, | |
128 | { 200, 1000 }, | |
129 | { 500, 1000 }, | |
130 | /* seconds */ | |
131 | { 1, 1 }, | |
132 | { 2, 1 }, | |
133 | { 5, 1 }, | |
134 | { 10, 1 }, | |
135 | { 20, 1 }, | |
136 | { 50, 1 }, | |
137 | { 100, 1 }, | |
138 | { 200, 1 }, | |
139 | { 500, 1 }, | |
140 | { 1000, 1 }, | |
141 | }; | |
142 | ||
143 | static const uint64_t vdivs[][2] = { | |
144 | /* millivolts */ | |
145 | { 1, 1000 }, | |
146 | { 2, 1000 }, | |
147 | { 5, 1000 }, | |
148 | { 10, 1000 }, | |
149 | { 20, 1000 }, | |
150 | { 50, 1000 }, | |
151 | { 100, 1000 }, | |
152 | { 200, 1000 }, | |
153 | { 500, 1000 }, | |
154 | /* volts */ | |
155 | { 1, 1 }, | |
156 | { 2, 1 }, | |
157 | { 5, 1 }, | |
158 | { 10, 1 }, | |
159 | { 20, 1 }, | |
160 | { 50, 1 }, | |
161 | }; | |
162 | ||
163 | static const char *scope_analog_channel_names[] = { | |
164 | "CH1", "CH2", "CH3", "CH4", | |
165 | }; | |
166 | ||
167 | static const struct scope_config scope_models[] = { | |
168 | { | |
169 | /* Default config */ | |
170 | .name = {NULL}, | |
171 | ||
172 | .analog_channels = 4, | |
173 | .analog_names = &scope_analog_channel_names, | |
174 | ||
175 | .coupling_options = &coupling_options, | |
176 | .num_coupling_options = ARRAY_SIZE(coupling_options), | |
177 | ||
178 | .trigger_sources = &trigger_sources, | |
179 | .num_trigger_sources = ARRAY_SIZE(trigger_sources), | |
180 | ||
181 | .trigger_slopes = &scope_trigger_slopes, | |
182 | .num_trigger_slopes = ARRAY_SIZE(scope_trigger_slopes), | |
183 | ||
184 | .timebases = &timebases, | |
185 | .num_timebases = ARRAY_SIZE(timebases), | |
186 | ||
187 | .vdivs = &vdivs, | |
188 | .num_vdivs = ARRAY_SIZE(vdivs), | |
189 | ||
190 | .num_xdivs = 10, | |
191 | .num_ydivs = 8, | |
192 | }, | |
193 | }; | |
194 | ||
195 | static void scope_state_dump(const struct scope_config *config, | |
196 | struct scope_state *state) | |
197 | { | |
198 | unsigned int i; | |
199 | char *tmp; | |
200 | ||
201 | for (i = 0; i < config->analog_channels; i++) { | |
202 | tmp = sr_voltage_string((*config->vdivs)[state->analog_channels[i].vdiv][0], | |
203 | (*config->vdivs)[state->analog_channels[i].vdiv][1]); | |
204 | sr_info("State of analog channel %d -> %s : %s (coupling) %s (vdiv) %2.2e (offset)", | |
205 | i + 1, state->analog_channels[i].state ? "On" : "Off", | |
206 | (*config->coupling_options)[state->analog_channels[i].coupling], | |
207 | tmp, state->analog_channels[i].vertical_offset); | |
208 | } | |
209 | ||
210 | tmp = sr_period_string((*config->timebases)[state->timebase][0], | |
211 | (*config->timebases)[state->timebase][1]); | |
212 | sr_info("Current timebase: %s", tmp); | |
213 | g_free(tmp); | |
214 | ||
215 | tmp = sr_samplerate_string(state->sample_rate); | |
216 | sr_info("Current samplerate: %s", tmp); | |
217 | g_free(tmp); | |
218 | ||
219 | sr_info("Current trigger: %s (source), %s (slope) %.2f (offset)", | |
220 | (*config->trigger_sources)[state->trigger_source], | |
221 | (*config->trigger_slopes)[state->trigger_slope], | |
222 | state->horiz_triggerpos); | |
223 | } | |
224 | ||
225 | static int scope_state_get_array_option(const char *resp, | |
226 | const char *(*array)[], unsigned int n, int *result) | |
227 | { | |
228 | unsigned int i; | |
229 | ||
230 | for (i = 0; i < n; i++) { | |
231 | if (!g_strcmp0(resp, (*array)[i])) { | |
232 | *result = i; | |
233 | return SR_OK; | |
234 | } | |
235 | } | |
236 | ||
237 | return SR_ERR; | |
238 | } | |
239 | ||
240 | /** | |
241 | * This function takes a value of the form "2.000E-03" and returns the index | |
242 | * of an array where a matching pair was found. | |
243 | * | |
244 | * @param value The string to be parsed. | |
245 | * @param array The array of s/f pairs. | |
246 | * @param array_len The number of pairs in the array. | |
247 | * @param result The index at which a matching pair was found. | |
248 | * | |
249 | * @return SR_ERR on any parsing error, SR_OK otherwise. | |
250 | */ | |
251 | static int array_float_get(gchar *value, const uint64_t array[][2], | |
252 | int array_len, unsigned int *result) | |
253 | { | |
254 | struct sr_rational rval; | |
255 | struct sr_rational aval; | |
256 | ||
257 | if (sr_parse_rational(value, &rval) != SR_OK) | |
258 | return SR_ERR; | |
259 | ||
260 | for (int i = 0; i < array_len; i++) { | |
261 | sr_rational_set(&aval, array[i][0], array[i][1]); | |
262 | if (sr_rational_eq(&rval, &aval)) { | |
263 | *result = i; | |
264 | return SR_OK; | |
265 | } | |
266 | } | |
267 | ||
268 | return SR_ERR; | |
269 | } | |
270 | ||
271 | static int analog_channel_state_get(struct sr_scpi_dev_inst *scpi, | |
272 | const struct scope_config *config, | |
273 | struct scope_state *state) | |
274 | { | |
275 | unsigned int i, j; | |
276 | char command[MAX_COMMAND_SIZE]; | |
277 | char *tmp_str; | |
278 | ||
279 | for (i = 0; i < config->analog_channels; i++) { | |
280 | g_snprintf(command, sizeof(command), "C%d:TRACE?", i + 1); | |
281 | ||
282 | if (sr_scpi_get_bool(scpi, command, | |
283 | &state->analog_channels[i].state) != SR_OK) | |
284 | return SR_ERR; | |
285 | ||
286 | g_snprintf(command, sizeof(command), "C%d:VDIV?", i + 1); | |
287 | ||
288 | if (sr_scpi_get_string(scpi, command, &tmp_str) != SR_OK) | |
289 | return SR_ERR; | |
290 | ||
291 | if (array_float_get(tmp_str, ARRAY_AND_SIZE(vdivs), &j) != SR_OK) { | |
292 | g_free(tmp_str); | |
293 | sr_err("Could not determine array index for vertical div scale."); | |
294 | return SR_ERR; | |
295 | } | |
296 | ||
297 | g_free(tmp_str); | |
298 | state->analog_channels[i].vdiv = j; | |
299 | ||
300 | g_snprintf(command, sizeof(command), "C%d:OFFSET?", i + 1); | |
301 | ||
302 | if (sr_scpi_get_float(scpi, command, &state->analog_channels[i].vertical_offset) != SR_OK) | |
303 | return SR_ERR; | |
304 | ||
305 | g_snprintf(command, sizeof(command), "C%d:COUPLING?", i + 1); | |
306 | ||
307 | if (sr_scpi_get_string(scpi, command, &tmp_str) != SR_OK) | |
308 | return SR_ERR; | |
309 | ||
310 | ||
311 | if (scope_state_get_array_option(tmp_str, config->coupling_options, | |
312 | config->num_coupling_options, | |
313 | &state->analog_channels[i].coupling) != SR_OK) | |
314 | return SR_ERR; | |
315 | ||
316 | g_free(tmp_str); | |
317 | } | |
318 | ||
319 | return SR_OK; | |
320 | } | |
321 | ||
322 | SR_PRIV int lecroy_xstream_update_sample_rate(const struct sr_dev_inst *sdi) | |
323 | { | |
324 | struct dev_context *devc; | |
325 | struct scope_state *state; | |
326 | const struct scope_config *config; | |
327 | float memsize, timediv; | |
328 | ||
329 | devc = sdi->priv; | |
330 | state = devc->model_state; | |
331 | config = devc->model_config; | |
332 | ||
333 | if (sr_scpi_get_float(sdi->conn, "MEMORY_SIZE?", &memsize) != SR_OK) | |
334 | return SR_ERR; | |
335 | ||
336 | if (sr_scpi_get_float(sdi->conn, "TIME_DIV?", &timediv) != SR_OK) | |
337 | return SR_ERR; | |
338 | ||
339 | state->sample_rate = 1 / ((timediv * config->num_xdivs) / memsize); | |
340 | ||
341 | return SR_OK; | |
342 | } | |
343 | ||
344 | SR_PRIV int lecroy_xstream_state_get(struct sr_dev_inst *sdi) | |
345 | { | |
346 | struct dev_context *devc; | |
347 | struct scope_state *state; | |
348 | const struct scope_config *config; | |
349 | unsigned int i; | |
350 | char *tmp_str, *tmp_str2, *tmpp, *p, *key; | |
351 | char command[MAX_COMMAND_SIZE]; | |
352 | char *trig_source = NULL; | |
353 | ||
354 | devc = sdi->priv; | |
355 | config = devc->model_config; | |
356 | state = devc->model_state; | |
357 | ||
358 | sr_info("Fetching scope state"); | |
359 | ||
360 | if (analog_channel_state_get(sdi->conn, config, state) != SR_OK) | |
361 | return SR_ERR; | |
362 | ||
363 | if (sr_scpi_get_string(sdi->conn, "TIME_DIV?", &tmp_str) != SR_OK) | |
364 | return SR_ERR; | |
365 | ||
366 | if (array_float_get(tmp_str, ARRAY_AND_SIZE(timebases), &i) != SR_OK) { | |
367 | g_free(tmp_str); | |
368 | sr_err("Could not determine array index for timbase scale."); | |
369 | return SR_ERR; | |
370 | } | |
371 | g_free(tmp_str); | |
372 | state->timebase = i; | |
373 | ||
374 | if (sr_scpi_get_string(sdi->conn, "TRIG_SELECT?", &tmp_str) != SR_OK) | |
375 | return SR_ERR; | |
376 | ||
377 | key = tmpp = NULL; | |
378 | tmp_str2 = tmp_str; | |
379 | i = 0; | |
380 | while ((p = strtok_r(tmp_str2, ",", &tmpp))) { | |
381 | tmp_str2 = NULL; | |
382 | if (i == 0) { | |
383 | /* trigger type */ | |
384 | } else if (i & 1) { | |
385 | key = p; | |
386 | /* key */ | |
387 | } else if (!(i & 1)) { | |
388 | if (!strcmp(key, "SR")) | |
389 | trig_source = p; | |
390 | } | |
391 | i++; | |
392 | } | |
393 | ||
394 | if (!trig_source || scope_state_get_array_option(trig_source, config->trigger_sources, config->num_trigger_sources, &state->trigger_source) != SR_OK) | |
395 | return SR_ERR; | |
396 | ||
397 | g_snprintf(command, sizeof(command), "%s:TRIG_SLOPE?", trig_source); | |
398 | if (sr_scpi_get_string(sdi->conn, command, &tmp_str) != SR_OK) | |
399 | return SR_ERR; | |
400 | ||
401 | if (scope_state_get_array_option(tmp_str, | |
402 | config->trigger_slopes, config->num_trigger_slopes, &state->trigger_slope) != SR_OK) | |
403 | return SR_ERR; | |
404 | ||
405 | if (sr_scpi_get_float(sdi->conn, "TRIG_DELAY?", &state->horiz_triggerpos) != SR_OK) | |
406 | return SR_ERR; | |
407 | ||
408 | if (lecroy_xstream_update_sample_rate(sdi) != SR_OK) | |
409 | return SR_ERR; | |
410 | ||
411 | sr_info("Fetching finished."); | |
412 | ||
413 | scope_state_dump(config, state); | |
414 | ||
415 | return SR_OK; | |
416 | } | |
417 | ||
418 | static struct scope_state *scope_state_new(const struct scope_config *config) | |
419 | { | |
420 | struct scope_state *state; | |
421 | ||
422 | state = g_malloc0(sizeof(struct scope_state)); | |
423 | state->analog_channels = g_malloc0_n(config->analog_channels, | |
424 | sizeof(struct analog_channel_state)); | |
425 | return state; | |
426 | } | |
427 | ||
428 | SR_PRIV void lecroy_xstream_state_free(struct scope_state *state) | |
429 | { | |
430 | g_free(state->analog_channels); | |
431 | g_free(state); | |
432 | } | |
433 | ||
434 | SR_PRIV int lecroy_xstream_init_device(struct sr_dev_inst *sdi) | |
435 | { | |
436 | char command[MAX_COMMAND_SIZE]; | |
437 | int model_index; | |
438 | unsigned int i, j; | |
439 | struct sr_channel *ch; | |
440 | struct dev_context *devc; | |
441 | gboolean channel_enabled; | |
442 | ||
443 | devc = sdi->priv; | |
444 | model_index = -1; | |
445 | ||
446 | /* Find the exact model. */ | |
447 | for (i = 0; i < ARRAY_SIZE(scope_models); i++) { | |
448 | for (j = 0; scope_models[i].name[j]; j++) { | |
449 | if (!strcmp(sdi->model, scope_models[i].name[j])) { | |
450 | model_index = i; | |
451 | break; | |
452 | } | |
453 | } | |
454 | if (model_index != -1) | |
455 | break; | |
456 | } | |
457 | ||
458 | if (model_index == -1) { | |
459 | sr_dbg("Unknown LeCroy device, using default config."); | |
460 | for (i = 0; i < ARRAY_SIZE(scope_models); i++) | |
461 | if (scope_models[i].name[0] == NULL) | |
462 | model_index = i; | |
463 | } | |
464 | ||
465 | /* Set the desired response and format modes. */ | |
466 | sr_scpi_send(sdi->conn, "COMM_HEADER OFF"); | |
467 | sr_scpi_send(sdi->conn, "COMM_FORMAT OFF,WORD,BIN"); | |
468 | ||
469 | devc->analog_groups = g_malloc0(sizeof(struct sr_channel_group*) * | |
470 | scope_models[model_index].analog_channels); | |
471 | ||
472 | /* Add analog channels. */ | |
473 | for (i = 0; i < scope_models[model_index].analog_channels; i++) { | |
474 | g_snprintf(command, sizeof(command), "C%d:TRACE?", i + 1); | |
475 | ||
476 | if (sr_scpi_get_bool(sdi->conn, command, &channel_enabled) != SR_OK) | |
477 | return SR_ERR; | |
478 | ||
479 | g_snprintf(command, sizeof(command), "C%d:VDIV?", i + 1); | |
480 | ||
481 | ch = sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, channel_enabled, | |
482 | (*scope_models[model_index].analog_names)[i]); | |
483 | ||
484 | devc->analog_groups[i] = g_malloc0(sizeof(struct sr_channel_group)); | |
485 | ||
486 | devc->analog_groups[i]->name = g_strdup( | |
487 | (char *)(*scope_models[model_index].analog_names)[i]); | |
488 | devc->analog_groups[i]->channels = g_slist_append(NULL, ch); | |
489 | ||
490 | sdi->channel_groups = g_slist_append(sdi->channel_groups, | |
491 | devc->analog_groups[i]); | |
492 | } | |
493 | ||
494 | devc->model_config = &scope_models[model_index]; | |
495 | devc->frame_limit = 0; | |
496 | ||
497 | if (!(devc->model_state = scope_state_new(devc->model_config))) | |
498 | return SR_ERR_MALLOC; | |
499 | ||
500 | return SR_OK; | |
501 | } | |
502 | ||
503 | static int lecroy_waveform_2_x_to_analog(GByteArray *data, | |
504 | struct lecroy_wavedesc *desc, | |
505 | struct sr_datafeed_analog *analog) | |
506 | { | |
507 | struct sr_analog_encoding *encoding = analog->encoding; | |
508 | struct sr_analog_meaning *meaning = analog->meaning; | |
509 | struct sr_analog_spec *spec = analog->spec; | |
510 | float *data_float; | |
511 | int16_t *waveform_data; | |
512 | unsigned int i, num_samples; | |
513 | ||
514 | data_float = g_malloc(desc->version_2_x.wave_array_count * sizeof(float)); | |
515 | num_samples = desc->version_2_x.wave_array_count; | |
516 | ||
517 | waveform_data = (int16_t *)(data->data + | |
518 | + desc->version_2_x.wave_descriptor_length | |
519 | + desc->version_2_x.user_text_len); | |
520 | ||
521 | for (i = 0; i < num_samples; i++) | |
522 | data_float[i] = (float)waveform_data[i] | |
523 | * desc->version_2_x.vertical_gain | |
524 | + desc->version_2_x.vertical_offset; | |
525 | ||
526 | analog->data = data_float; | |
527 | analog->num_samples = num_samples; | |
528 | ||
529 | encoding->unitsize = sizeof(float); | |
530 | encoding->is_signed = TRUE; | |
531 | encoding->is_float = TRUE; | |
532 | encoding->is_bigendian = FALSE; | |
533 | encoding->scale.p = 1; | |
534 | encoding->scale.q = 1; | |
535 | encoding->offset.p = 0; | |
536 | encoding->offset.q = 1; | |
537 | ||
538 | encoding->digits = 6; | |
539 | encoding->is_digits_decimal = FALSE; | |
540 | ||
541 | if (strcmp(desc->version_2_x.vertunit, "A")) { | |
542 | meaning->mq = SR_MQ_CURRENT; | |
543 | meaning->unit = SR_UNIT_AMPERE; | |
544 | } else { | |
545 | /* Default to voltage. */ | |
546 | meaning->mq = SR_MQ_VOLTAGE; | |
547 | meaning->unit = SR_UNIT_VOLT; | |
548 | } | |
549 | ||
550 | meaning->mqflags = 0; | |
551 | spec->spec_digits = 3; | |
552 | ||
553 | return SR_OK; | |
554 | } | |
555 | ||
556 | static int lecroy_waveform_to_analog(GByteArray *data, | |
557 | struct sr_datafeed_analog *analog) | |
558 | { | |
559 | struct lecroy_wavedesc *desc; | |
560 | ||
561 | if (data->len < sizeof(struct lecroy_wavedesc)) | |
562 | return SR_ERR; | |
563 | ||
564 | desc = (struct lecroy_wavedesc *)data->data; | |
565 | ||
566 | if (!strncmp(desc->template_name, "LECROY_2_2", 16) || | |
567 | !strncmp(desc->template_name, "LECROY_2_3", 16)) { | |
568 | return lecroy_waveform_2_x_to_analog(data, desc, analog); | |
569 | } | |
570 | ||
571 | sr_err("Waveformat template '%.16s' not supported.", | |
572 | desc->template_name); | |
573 | ||
574 | return SR_ERR; | |
575 | } | |
576 | ||
577 | SR_PRIV int lecroy_xstream_receive_data(int fd, int revents, void *cb_data) | |
578 | { | |
579 | struct sr_channel *ch; | |
580 | struct sr_dev_inst *sdi; | |
581 | struct dev_context *devc; | |
582 | struct sr_datafeed_packet packet; | |
583 | GByteArray *data; | |
584 | struct sr_datafeed_analog analog; | |
585 | struct sr_analog_encoding encoding; | |
586 | struct sr_analog_meaning meaning; | |
587 | struct sr_analog_spec spec; | |
588 | char buf[8]; | |
589 | ||
590 | (void)fd; | |
591 | (void)revents; | |
592 | ||
593 | data = NULL; | |
594 | ||
595 | if (!(sdi = cb_data)) | |
596 | return TRUE; | |
597 | ||
598 | if (!(devc = sdi->priv)) | |
599 | return TRUE; | |
600 | ||
601 | ch = devc->current_channel->data; | |
602 | ||
603 | /* | |
604 | * Send "frame begin" packet upon reception of data for the | |
605 | * first enabled channel. | |
606 | */ | |
607 | if (devc->current_channel == devc->enabled_channels) { | |
608 | packet.type = SR_DF_FRAME_BEGIN; | |
609 | sr_session_send(sdi, &packet); | |
610 | } | |
611 | ||
612 | if (ch->type != SR_CHANNEL_ANALOG) | |
613 | return SR_ERR; | |
614 | ||
615 | /* Pass on the received data of the channel(s). */ | |
616 | if (sr_scpi_read_data(sdi->conn, buf, 4) != 4) { | |
617 | sr_err("Reading header failed."); | |
618 | return TRUE; | |
619 | } | |
620 | ||
621 | if (sr_scpi_get_block(sdi->conn, NULL, &data) != SR_OK) { | |
622 | if (data) | |
623 | g_byte_array_free(data, TRUE); | |
624 | return TRUE; | |
625 | } | |
626 | ||
627 | analog.encoding = &encoding; | |
628 | analog.meaning = &meaning; | |
629 | analog.spec = &spec; | |
630 | ||
631 | if (lecroy_waveform_to_analog(data, &analog) != SR_OK) | |
632 | return SR_ERR; | |
633 | ||
634 | meaning.channels = g_slist_append(NULL, ch); | |
635 | packet.payload = &analog; | |
636 | packet.type = SR_DF_ANALOG; | |
637 | sr_session_send(sdi, &packet); | |
638 | ||
639 | g_byte_array_free(data, TRUE); | |
640 | data = NULL; | |
641 | ||
642 | g_slist_free(meaning.channels); | |
643 | g_free(analog.data); | |
644 | ||
645 | /* | |
646 | * Advance to the next enabled channel. When data for all enabled | |
647 | * channels was received, then flush potentially queued logic data, | |
648 | * and send the "frame end" packet. | |
649 | */ | |
650 | if (devc->current_channel->next) { | |
651 | devc->current_channel = devc->current_channel->next; | |
652 | lecroy_xstream_request_data(sdi); | |
653 | return TRUE; | |
654 | } | |
655 | ||
656 | packet.type = SR_DF_FRAME_END; | |
657 | sr_session_send(sdi, &packet); | |
658 | ||
659 | /* | |
660 | * End of frame was reached. Stop acquisition after the specified | |
661 | * number of frames, or continue reception by starting over at | |
662 | * the first enabled channel. | |
663 | */ | |
664 | if (++devc->num_frames == devc->frame_limit) { | |
665 | sr_dev_acquisition_stop(sdi); | |
666 | } else { | |
667 | devc->current_channel = devc->enabled_channels; | |
668 | lecroy_xstream_request_data(sdi); | |
669 | } | |
670 | ||
671 | return TRUE; | |
672 | } |