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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Martin Ling <martin-git@earth.li> | |
5 | * Copyright (C) 2013 Bert Vermeulen <bert@biot.com> | |
6 | * Copyright (C) 2013 Mathias Grimmberger <mgri@zaphod.sax.de> | |
7 | * | |
8 | * This program is free software: you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation, either version 3 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #include <stdlib.h> | |
23 | #include <stdarg.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
26 | #include <string.h> | |
27 | #include <math.h> | |
28 | #include <ctype.h> | |
29 | #include <time.h> | |
30 | #include <glib.h> | |
31 | #include "libsigrok.h" | |
32 | #include "libsigrok-internal.h" | |
33 | #include "protocol.h" | |
34 | ||
35 | /* | |
36 | * This is a unified protocol driver for the DS1000 and DS2000 series. | |
37 | * | |
38 | * DS1000 support tested with a Rigol DS1102D. | |
39 | * | |
40 | * DS2000 support tested with a Rigol DS2072 using firmware version 01.01.00.02. | |
41 | * | |
42 | * The Rigol DS2000 series scopes try to adhere to the IEEE 488.2 (I think) | |
43 | * standard. If you want to read it - it costs real money... | |
44 | * | |
45 | * Every response from the scope has a linefeed appended because the | |
46 | * standard says so. In principle this could be ignored because sending the | |
47 | * next command clears the output queue of the scope. This driver tries to | |
48 | * avoid doing that because it may cause an error being generated inside the | |
49 | * scope and who knows what bugs the firmware has WRT this. | |
50 | * | |
51 | * Waveform data is transferred in a format called "arbitrary block program | |
52 | * data" specified in IEEE 488.2. See Agilents programming manuals for their | |
53 | * 2000/3000 series scopes for a nice description. | |
54 | * | |
55 | * Each data block from the scope has a header, e.g. "#900000001400". | |
56 | * The '#' marks the start of a block. | |
57 | * Next is one ASCII decimal digit between 1 and 9, this gives the number of | |
58 | * ASCII decimal digits following. | |
59 | * Last are the ASCII decimal digits giving the number of bytes (not | |
60 | * samples!) in the block. | |
61 | * | |
62 | * After this header as many data bytes as indicated follow. | |
63 | * | |
64 | * Each data block has a trailing linefeed too. | |
65 | */ | |
66 | ||
67 | static int get_cfg(const struct sr_dev_inst *sdi, char *cmd, char *reply, size_t maxlen); | |
68 | static int get_cfg_int(const struct sr_dev_inst *sdi, char *cmd, int *i); | |
69 | ||
70 | static int parse_int(const char *str, int *ret) | |
71 | { | |
72 | char *e; | |
73 | long tmp; | |
74 | ||
75 | errno = 0; | |
76 | tmp = strtol(str, &e, 10); | |
77 | if (e == str || *e != '\0') { | |
78 | sr_dbg("Failed to parse integer: '%s'", str); | |
79 | return SR_ERR; | |
80 | } | |
81 | if (errno) { | |
82 | sr_dbg("Failed to parse integer: '%s', numerical overflow", str); | |
83 | return SR_ERR; | |
84 | } | |
85 | if (tmp > INT_MAX || tmp < INT_MIN) { | |
86 | sr_dbg("Failed to parse integer: '%s', value to large/small", str); | |
87 | return SR_ERR; | |
88 | } | |
89 | ||
90 | *ret = (int)tmp; | |
91 | return SR_OK; | |
92 | } | |
93 | ||
94 | /* Set the next event to wait for in rigol_ds_receive */ | |
95 | static void rigol_ds_set_wait_event(struct dev_context *devc, enum wait_events event) | |
96 | { | |
97 | if (event == WAIT_STOP) | |
98 | devc->wait_status = 2; | |
99 | else | |
100 | devc->wait_status = 1; | |
101 | devc->wait_event = event; | |
102 | } | |
103 | ||
104 | /* | |
105 | * Waiting for a event will return a timeout after 2 to 3 seconds in order | |
106 | * to not block the application. | |
107 | */ | |
108 | static int rigol_ds_event_wait(const struct sr_dev_inst *sdi, char status1, char status2) | |
109 | { | |
110 | char buf[20]; | |
111 | struct dev_context *devc; | |
112 | time_t start; | |
113 | ||
114 | if (!(devc = sdi->priv)) | |
115 | return SR_ERR; | |
116 | ||
117 | start = time(NULL); | |
118 | ||
119 | /* | |
120 | * Trigger status may return: | |
121 | * "TD" or "T'D" - triggered | |
122 | * "AUTO" - autotriggered | |
123 | * "RUN" - running | |
124 | * "WAIT" - waiting for trigger | |
125 | * "STOP" - stopped | |
126 | */ | |
127 | ||
128 | if (devc->wait_status == 1) { | |
129 | do { | |
130 | if (time(NULL) - start >= 3) { | |
131 | sr_dbg("Timeout waiting for trigger"); | |
132 | return SR_ERR_TIMEOUT; | |
133 | } | |
134 | ||
135 | if (get_cfg(sdi, ":TRIG:STAT?", buf, sizeof(buf)) != SR_OK) | |
136 | return SR_ERR; | |
137 | } while (buf[0] == status1 || buf[0] == status2); | |
138 | ||
139 | devc->wait_status = 2; | |
140 | } | |
141 | if (devc->wait_status == 2) { | |
142 | do { | |
143 | if (time(NULL) - start >= 3) { | |
144 | sr_dbg("Timeout waiting for trigger"); | |
145 | return SR_ERR_TIMEOUT; | |
146 | } | |
147 | ||
148 | if (get_cfg(sdi, ":TRIG:STAT?", buf, sizeof(buf)) != SR_OK) | |
149 | return SR_ERR; | |
150 | } while (buf[0] != status1 && buf[0] != status2); | |
151 | ||
152 | rigol_ds_set_wait_event(devc, WAIT_NONE); | |
153 | } | |
154 | ||
155 | return SR_OK; | |
156 | } | |
157 | ||
158 | /* | |
159 | * For live capture we need to wait for a new trigger event to ensure that | |
160 | * sample data is not returned twice. | |
161 | * | |
162 | * Unfortunately this will never really work because for sufficiently fast | |
163 | * timebases and trigger rates it just can't catch the status changes. | |
164 | * | |
165 | * What would be needed is a trigger event register with autoreset like the | |
166 | * Agilents have. The Rigols don't seem to have anything like this. | |
167 | * | |
168 | * The workaround is to only wait for the trigger when the timebase is slow | |
169 | * enough. Of course this means that for faster timebases sample data can be | |
170 | * returned multiple times, this effect is mitigated somewhat by sleeping | |
171 | * for about one sweep time in that case. | |
172 | */ | |
173 | static int rigol_ds_trigger_wait(const struct sr_dev_inst *sdi) | |
174 | { | |
175 | struct dev_context *devc; | |
176 | long s; | |
177 | ||
178 | if (!(devc = sdi->priv)) | |
179 | return SR_ERR; | |
180 | ||
181 | /* | |
182 | * If timebase < 50 msecs/DIV just sleep about one sweep time except | |
183 | * for really fast sweeps. | |
184 | */ | |
185 | if (devc->timebase < 0.0499) | |
186 | { | |
187 | if (devc->timebase > 0.99e-6) { | |
188 | /* | |
189 | * Timebase * num hor. divs * 85(%) * 1e6(usecs) / 100 | |
190 | * -> 85 percent of sweep time | |
191 | */ | |
192 | s = (devc->timebase * devc->model->num_horizontal_divs | |
193 | * 85e6) / 100L; | |
194 | sr_spew("Sleeping for %ld usecs instead of trigger-wait", s); | |
195 | g_usleep(s); | |
196 | } | |
197 | rigol_ds_set_wait_event(devc, WAIT_NONE); | |
198 | return SR_OK; | |
199 | } else { | |
200 | return rigol_ds_event_wait(sdi, 'T', 'A'); | |
201 | } | |
202 | } | |
203 | ||
204 | /* Wait for scope to got to "Stop" in single shot mode */ | |
205 | static int rigol_ds_stop_wait(const struct sr_dev_inst *sdi) | |
206 | { | |
207 | return rigol_ds_event_wait(sdi, 'S', 'S'); | |
208 | } | |
209 | ||
210 | /* Check that a single shot acquisition actually succeeded on the DS2000 */ | |
211 | static int rigol_ds_check_stop(const struct sr_dev_inst *sdi) | |
212 | { | |
213 | struct dev_context *devc; | |
214 | int tmp; | |
215 | ||
216 | if (!(devc = sdi->priv)) | |
217 | return SR_ERR; | |
218 | ||
219 | if (sr_scpi_send(sdi->conn, ":WAV:SOUR CHAN%d", | |
220 | devc->channel_frame->index + 1) != SR_OK) | |
221 | return SR_ERR; | |
222 | /* Check that the number of samples will be accepted */ | |
223 | if (sr_scpi_send(sdi->conn, ":WAV:POIN %d;*OPC", devc->analog_frame_size) != SR_OK) | |
224 | return SR_ERR; | |
225 | if (get_cfg_int(sdi, "*ESR?", &tmp) != SR_OK) | |
226 | return SR_ERR; | |
227 | /* | |
228 | * If we get an "Execution error" the scope went from "Single" to | |
229 | * "Stop" without actually triggering. There is no waveform | |
230 | * displayed and trying to download one will fail - the scope thinks | |
231 | * it has 1400 samples (like display memory) and the driver thinks | |
232 | * it has a different number of samples. | |
233 | * | |
234 | * In that case just try to capture something again. Might still | |
235 | * fail in interesting ways. | |
236 | * | |
237 | * Ain't firmware fun? | |
238 | */ | |
239 | if (tmp & 0x10) { | |
240 | sr_warn("Single shot acquisition failed, retrying..."); | |
241 | /* Sleep a bit, otherwise the single shot will often fail */ | |
242 | g_usleep(500000); | |
243 | sr_scpi_send(sdi->conn, ":SING"); | |
244 | rigol_ds_set_wait_event(devc, WAIT_STOP); | |
245 | return SR_ERR; | |
246 | } | |
247 | ||
248 | return SR_OK; | |
249 | } | |
250 | ||
251 | /* Wait for enough data becoming available in scope output buffer */ | |
252 | static int rigol_ds_block_wait(const struct sr_dev_inst *sdi) | |
253 | { | |
254 | char buf[30]; | |
255 | struct dev_context *devc; | |
256 | time_t start; | |
257 | int len; | |
258 | ||
259 | if (!(devc = sdi->priv)) | |
260 | return SR_ERR; | |
261 | ||
262 | start = time(NULL); | |
263 | ||
264 | do { | |
265 | if (time(NULL) - start >= 3) { | |
266 | sr_dbg("Timeout waiting for data block"); | |
267 | return SR_ERR_TIMEOUT; | |
268 | } | |
269 | ||
270 | /* | |
271 | * The scope copies data really slowly from sample | |
272 | * memory to its output buffer, so try not to bother | |
273 | * it too much with SCPI requests but don't wait too | |
274 | * long for short sample frame sizes. | |
275 | */ | |
276 | g_usleep(devc->analog_frame_size < 15000 ? 100000 : 1000000); | |
277 | ||
278 | /* "READ,nnnn" (still working) or "IDLE,nnnn" (finished) */ | |
279 | if (get_cfg(sdi, ":WAV:STAT?", buf, sizeof(buf)) != SR_OK) | |
280 | return SR_ERR; | |
281 | ||
282 | if (parse_int(buf + 5, &len) != SR_OK) | |
283 | return SR_ERR; | |
284 | } while (buf[0] == 'R' && len < 1000000); | |
285 | ||
286 | rigol_ds_set_wait_event(devc, WAIT_NONE); | |
287 | ||
288 | return SR_OK; | |
289 | } | |
290 | ||
291 | /* Start capturing a new frameset */ | |
292 | SR_PRIV int rigol_ds_capture_start(const struct sr_dev_inst *sdi) | |
293 | { | |
294 | struct dev_context *devc; | |
295 | ||
296 | if (!(devc = sdi->priv)) | |
297 | return SR_ERR; | |
298 | ||
299 | sr_dbg("Starting data capture for frameset %lu of %lu", | |
300 | devc->num_frames + 1, devc->limit_frames); | |
301 | ||
302 | if (sr_scpi_send(sdi->conn, ":WAV:FORM BYTE") != SR_OK) | |
303 | return SR_ERR; | |
304 | if (devc->data_source == DATA_SOURCE_LIVE) { | |
305 | if (sr_scpi_send(sdi->conn, ":WAV:MODE NORM") != SR_OK) | |
306 | return SR_ERR; | |
307 | rigol_ds_set_wait_event(devc, WAIT_TRIGGER); | |
308 | } else { | |
309 | if (sr_scpi_send(sdi->conn, ":WAV:MODE RAW") != SR_OK) | |
310 | return SR_ERR; | |
311 | if (sr_scpi_send(sdi->conn, ":SING", devc->analog_frame_size) != SR_OK) | |
312 | return SR_ERR; | |
313 | rigol_ds_set_wait_event(devc, WAIT_STOP); | |
314 | } | |
315 | ||
316 | return SR_OK; | |
317 | } | |
318 | ||
319 | /* Start reading data from the current channel */ | |
320 | SR_PRIV int rigol_ds_channel_start(const struct sr_dev_inst *sdi) | |
321 | { | |
322 | struct dev_context *devc; | |
323 | ||
324 | if (!(devc = sdi->priv)) | |
325 | return SR_ERR; | |
326 | ||
327 | sr_dbg("Starting reading data from channel %d", | |
328 | devc->channel_frame->index + 1); | |
329 | ||
330 | if (sr_scpi_send(sdi->conn, ":WAV:SOUR CHAN%d", | |
331 | devc->channel_frame->index + 1) != SR_OK) | |
332 | return SR_ERR; | |
333 | if (devc->data_source != DATA_SOURCE_LIVE) { | |
334 | if (sr_scpi_send(sdi->conn, ":WAV:RES") != SR_OK) | |
335 | return SR_ERR; | |
336 | if (sr_scpi_send(sdi->conn, ":WAV:BEG") != SR_OK) | |
337 | return SR_ERR; | |
338 | rigol_ds_set_wait_event(devc, WAIT_BLOCK); | |
339 | } else | |
340 | rigol_ds_set_wait_event(devc, WAIT_NONE); | |
341 | ||
342 | devc->num_frame_bytes = 0; | |
343 | devc->num_block_bytes = 0; | |
344 | ||
345 | return SR_OK; | |
346 | } | |
347 | ||
348 | /* Read the header of a data block */ | |
349 | static int rigol_ds_read_header(struct sr_scpi_dev_inst *scpi) | |
350 | { | |
351 | char start[3], length[10]; | |
352 | int len, tmp; | |
353 | ||
354 | /* Read the hashsign and length digit. */ | |
355 | tmp = sr_scpi_read(scpi, start, 2); | |
356 | start[2] = '\0'; | |
357 | if (tmp != 2) | |
358 | { | |
359 | sr_err("Failed to read first two bytes of data block header."); | |
360 | return -1; | |
361 | } | |
362 | if (start[0] != '#' || !isdigit(start[1]) || start[1] == '0') | |
363 | { | |
364 | sr_err("Received invalid data block header start '%s'.", start); | |
365 | return -1; | |
366 | } | |
367 | len = atoi(start + 1); | |
368 | ||
369 | /* Read the data length. */ | |
370 | tmp = sr_scpi_read(scpi, length, len); | |
371 | length[len] = '\0'; | |
372 | if (tmp != len) | |
373 | { | |
374 | sr_err("Failed to read %d bytes of data block length.", len); | |
375 | return -1; | |
376 | } | |
377 | if (parse_int(length, &len) != SR_OK) | |
378 | { | |
379 | sr_err("Received invalid data block length '%s'.", length); | |
380 | return -1; | |
381 | } | |
382 | ||
383 | sr_dbg("Received data block header: %s%s -> block length %d", start, length, len); | |
384 | ||
385 | return len; | |
386 | } | |
387 | ||
388 | SR_PRIV int rigol_ds_receive(int fd, int revents, void *cb_data) | |
389 | { | |
390 | struct sr_dev_inst *sdi; | |
391 | struct sr_scpi_dev_inst *scpi; | |
392 | struct dev_context *devc; | |
393 | struct sr_datafeed_packet packet; | |
394 | struct sr_datafeed_analog analog; | |
395 | struct sr_datafeed_logic logic; | |
396 | double vdiv, offset; | |
397 | int len, i, waveform_size, vref; | |
398 | struct sr_probe *probe; | |
399 | ||
400 | (void)fd; | |
401 | ||
402 | if (!(sdi = cb_data)) | |
403 | return TRUE; | |
404 | ||
405 | if (!(devc = sdi->priv)) | |
406 | return TRUE; | |
407 | ||
408 | scpi = sdi->conn; | |
409 | ||
410 | if (revents == G_IO_IN) { | |
411 | if (devc->model->protocol == PROTOCOL_IEEE488_2) { | |
412 | switch(devc->wait_event) { | |
413 | case WAIT_NONE: | |
414 | break; | |
415 | ||
416 | case WAIT_TRIGGER: | |
417 | if (rigol_ds_trigger_wait(sdi) != SR_OK) | |
418 | return TRUE; | |
419 | if (rigol_ds_channel_start(sdi) != SR_OK) | |
420 | return TRUE; | |
421 | break; | |
422 | ||
423 | case WAIT_BLOCK: | |
424 | if (rigol_ds_block_wait(sdi) != SR_OK) | |
425 | return TRUE; | |
426 | break; | |
427 | ||
428 | case WAIT_STOP: | |
429 | if (rigol_ds_stop_wait(sdi) != SR_OK) | |
430 | return TRUE; | |
431 | if (rigol_ds_check_stop(sdi) != SR_OK) | |
432 | return TRUE; | |
433 | if (rigol_ds_channel_start(sdi) != SR_OK) | |
434 | return TRUE; | |
435 | return TRUE; | |
436 | ||
437 | default: | |
438 | sr_err("BUG: Unknown event target encountered"); | |
439 | } | |
440 | ||
441 | if (devc->num_block_bytes == 0) { | |
442 | sr_dbg("New block header expected"); | |
443 | if (sr_scpi_send(sdi->conn, ":WAV:DATA?") != SR_OK) | |
444 | return TRUE; | |
445 | len = rigol_ds_read_header(scpi); | |
446 | if (len == -1) | |
447 | return TRUE; | |
448 | /* At slow timebases in live capture the DS2072 | |
449 | * sometimes returns "short" data blocks, with | |
450 | * apparently no way to get the rest of the data. | |
451 | * Discard these, the complete data block will | |
452 | * appear eventually. | |
453 | */ | |
454 | if (devc->data_source == DATA_SOURCE_LIVE | |
455 | && (unsigned)len < devc->num_frame_bytes) { | |
456 | sr_dbg("Discarding short data block"); | |
457 | sr_scpi_read(scpi, (char *)devc->buffer, len + 1); | |
458 | return TRUE; | |
459 | } | |
460 | devc->num_block_bytes = len; | |
461 | devc->num_block_read = 0; | |
462 | } | |
463 | } | |
464 | ||
465 | probe = devc->channel_frame; | |
466 | if (devc->model->protocol == PROTOCOL_IEEE488_2) { | |
467 | len = devc->num_block_bytes - devc->num_block_read; | |
468 | len = sr_scpi_read(scpi, (char *)devc->buffer, | |
469 | len < ACQ_BUFFER_SIZE ? len : ACQ_BUFFER_SIZE); | |
470 | } else { | |
471 | waveform_size = probe->type == SR_PROBE_ANALOG ? | |
472 | DS1000_ANALOG_LIVE_WAVEFORM_SIZE : DIGITAL_WAVEFORM_SIZE; | |
473 | len = sr_scpi_read(scpi, (char *)devc->buffer, | |
474 | waveform_size - devc->num_frame_bytes); | |
475 | } | |
476 | sr_dbg("Received %d bytes.", len); | |
477 | if (len == -1) | |
478 | return TRUE; | |
479 | ||
480 | if (devc->num_frame_bytes == 0) { | |
481 | /* Start of a new frame. */ | |
482 | packet.type = SR_DF_FRAME_BEGIN; | |
483 | sr_session_send(sdi, &packet); | |
484 | } | |
485 | ||
486 | if (probe->type == SR_PROBE_ANALOG) { | |
487 | if (devc->model->protocol == PROTOCOL_IEEE488_2) | |
488 | devc->num_block_read += len; | |
489 | vref = devc->vert_reference[probe->index]; | |
490 | vdiv = devc->vdiv[probe->index] / 25.6; | |
491 | offset = devc->vert_offset[probe->index]; | |
492 | if (devc->model->protocol == PROTOCOL_IEEE488_2) | |
493 | for (i = 0; i < len; i++) | |
494 | devc->data[i] = ((int)devc->buffer[i] - vref) * vdiv - offset; | |
495 | else | |
496 | for (i = 0; i < len; i++) | |
497 | devc->data[i] = (128 - devc->buffer[i]) * vdiv - offset; | |
498 | analog.probes = g_slist_append(NULL, probe); | |
499 | analog.num_samples = len; | |
500 | analog.data = devc->data; | |
501 | analog.mq = SR_MQ_VOLTAGE; | |
502 | analog.unit = SR_UNIT_VOLT; | |
503 | analog.mqflags = 0; | |
504 | packet.type = SR_DF_ANALOG; | |
505 | packet.payload = &analog; | |
506 | sr_session_send(cb_data, &packet); | |
507 | g_slist_free(analog.probes); | |
508 | ||
509 | if (devc->model->protocol == PROTOCOL_IEEE488_2) { | |
510 | if (devc->num_block_read == devc->num_block_bytes) { | |
511 | sr_dbg("Block has been completed"); | |
512 | /* Discard the terminating linefeed and prepare for | |
513 | possible next block */ | |
514 | sr_scpi_read(scpi, (char *)devc->buffer, 1); | |
515 | devc->num_block_bytes = 0; | |
516 | if (devc->data_source != DATA_SOURCE_LIVE) | |
517 | rigol_ds_set_wait_event(devc, WAIT_BLOCK); | |
518 | } else | |
519 | sr_dbg("%d of %d block bytes read", devc->num_block_read, devc->num_block_bytes); | |
520 | ||
521 | devc->num_frame_bytes += len; | |
522 | ||
523 | if (devc->num_frame_bytes < devc->analog_frame_size) | |
524 | /* Don't have the whole frame yet. */ | |
525 | return TRUE; | |
526 | ||
527 | sr_dbg("Frame completed, %d samples", devc->num_frame_bytes); | |
528 | } else { | |
529 | if (len != DS1000_ANALOG_LIVE_WAVEFORM_SIZE) | |
530 | /* Don't have the whole frame yet. */ | |
531 | return TRUE; | |
532 | } | |
533 | } else { | |
534 | logic.length = len - 10; | |
535 | logic.unitsize = 2; | |
536 | logic.data = devc->buffer + 10; | |
537 | packet.type = SR_DF_LOGIC; | |
538 | packet.payload = &logic; | |
539 | sr_session_send(cb_data, &packet); | |
540 | ||
541 | if (len != DIGITAL_WAVEFORM_SIZE) | |
542 | /* Don't have the whole frame yet. */ | |
543 | return TRUE; | |
544 | } | |
545 | ||
546 | /* End of the frame. */ | |
547 | packet.type = SR_DF_FRAME_END; | |
548 | sr_session_send(sdi, &packet); | |
549 | if (devc->model->protocol == PROTOCOL_LEGACY) | |
550 | devc->num_frame_bytes = 0; | |
551 | else { | |
552 | /* Signal end of data download to scope */ | |
553 | if (devc->data_source != DATA_SOURCE_LIVE) | |
554 | /* | |
555 | * This causes a query error, without it switching | |
556 | * to the next channel causes an error. Fun with | |
557 | * firmware... | |
558 | */ | |
559 | sr_scpi_send(sdi->conn, ":WAV:END"); | |
560 | } | |
561 | ||
562 | if (devc->enabled_analog_probes | |
563 | && devc->channel_frame == devc->enabled_analog_probes->data | |
564 | && devc->enabled_analog_probes->next != NULL) { | |
565 | /* We got the frame for the first analog channel, but | |
566 | * there's a second analog channel. */ | |
567 | devc->channel_frame = devc->enabled_analog_probes->next->data; | |
568 | if (devc->model->protocol == PROTOCOL_IEEE488_2) { | |
569 | rigol_ds_channel_start(sdi); | |
570 | } else { | |
571 | sr_scpi_send(sdi->conn, ":WAV:DATA? CHAN%c", | |
572 | devc->channel_frame->name[2]); | |
573 | } | |
574 | } else { | |
575 | /* Done with both analog channels in this frame. */ | |
576 | if (devc->enabled_digital_probes | |
577 | && devc->channel_frame != devc->enabled_digital_probes->data) { | |
578 | /* Now we need to get the digital data. */ | |
579 | devc->channel_frame = devc->enabled_digital_probes->data; | |
580 | sr_scpi_send(sdi->conn, ":WAV:DATA? DIG"); | |
581 | } else if (++devc->num_frames == devc->limit_frames) { | |
582 | /* End of last frame. */ | |
583 | packet.type = SR_DF_END; | |
584 | sr_session_send(sdi, &packet); | |
585 | sdi->driver->dev_acquisition_stop(sdi, cb_data); | |
586 | } else { | |
587 | /* Get the next frame, starting with the first analog channel. */ | |
588 | if (devc->model->protocol == PROTOCOL_IEEE488_2) { | |
589 | if (devc->enabled_analog_probes) { | |
590 | devc->channel_frame = devc->enabled_analog_probes->data; | |
591 | rigol_ds_capture_start(sdi); | |
592 | } | |
593 | } else { | |
594 | if (devc->enabled_analog_probes) { | |
595 | devc->channel_frame = devc->enabled_analog_probes->data; | |
596 | sr_scpi_send(sdi->conn, ":WAV:DATA? CHAN%c", | |
597 | devc->channel_frame->name[2]); | |
598 | } else { | |
599 | devc->channel_frame = devc->enabled_digital_probes->data; | |
600 | sr_scpi_send(sdi->conn, ":WAV:DATA? DIG"); | |
601 | } | |
602 | } | |
603 | } | |
604 | } | |
605 | } | |
606 | ||
607 | return TRUE; | |
608 | } | |
609 | ||
610 | static int get_cfg(const struct sr_dev_inst *sdi, char *cmd, char *reply, size_t maxlen) | |
611 | { | |
612 | int len; | |
613 | struct dev_context *devc = sdi->priv; | |
614 | struct sr_scpi_dev_inst *scpi = sdi->conn; | |
615 | char *response; | |
616 | ||
617 | if (sr_scpi_send(scpi, cmd) != SR_OK) | |
618 | return SR_ERR; | |
619 | ||
620 | if (sr_scpi_receive(scpi, &response) != SR_OK) | |
621 | return SR_ERR; | |
622 | ||
623 | g_strlcpy(reply, response, maxlen); | |
624 | g_free(response); | |
625 | len = strlen(reply); | |
626 | ||
627 | if (devc->model->protocol == PROTOCOL_IEEE488_2) { | |
628 | /* get rid of trailing linefeed */ | |
629 | if (len >= 1 && reply[len-1] == '\n') | |
630 | reply[len-1] = '\0'; | |
631 | } | |
632 | ||
633 | sr_spew("Received '%s'.", reply); | |
634 | ||
635 | return SR_OK; | |
636 | } | |
637 | ||
638 | static int get_cfg_int(const struct sr_dev_inst *sdi, char *cmd, int *i) | |
639 | { | |
640 | char buf[32]; | |
641 | ||
642 | if (get_cfg(sdi, cmd, buf, sizeof(buf)) != SR_OK) | |
643 | return SR_ERR; | |
644 | ||
645 | if (parse_int(buf, i) != SR_OK) | |
646 | return SR_ERR; | |
647 | ||
648 | return SR_OK; | |
649 | } | |
650 | ||
651 | static int get_cfg_float(const struct sr_dev_inst *sdi, char *cmd, float *f) | |
652 | { | |
653 | char buf[32], *e; | |
654 | ||
655 | if (get_cfg(sdi, cmd, buf, sizeof(buf)) != SR_OK) | |
656 | return SR_ERR; | |
657 | *f = strtof(buf, &e); | |
658 | if (e == buf || (fpclassify(*f) & (FP_ZERO | FP_NORMAL)) == 0) { | |
659 | sr_dbg("failed to parse response to '%s': '%s'", cmd, buf); | |
660 | return SR_ERR; | |
661 | } | |
662 | ||
663 | return SR_OK; | |
664 | } | |
665 | ||
666 | static int get_cfg_string(const struct sr_dev_inst *sdi, char *cmd, char **buf) | |
667 | { | |
668 | if (!(*buf = g_try_malloc0(256))) | |
669 | return SR_ERR_MALLOC; | |
670 | ||
671 | if (get_cfg(sdi, cmd, *buf, 256) != SR_OK) | |
672 | return SR_ERR; | |
673 | ||
674 | return SR_OK; | |
675 | } | |
676 | ||
677 | SR_PRIV int rigol_ds_get_dev_cfg(const struct sr_dev_inst *sdi) | |
678 | { | |
679 | struct dev_context *devc; | |
680 | char *t_s, *cmd; | |
681 | int i, res; | |
682 | ||
683 | devc = sdi->priv; | |
684 | ||
685 | /* Analog channel state. */ | |
686 | if (get_cfg_string(sdi, ":CHAN1:DISP?", &t_s) != SR_OK) | |
687 | return SR_ERR; | |
688 | devc->analog_channels[0] = !strcmp(t_s, "ON") || !strcmp(t_s, "1"); | |
689 | g_free(t_s); | |
690 | if (get_cfg_string(sdi, ":CHAN2:DISP?", &t_s) != SR_OK) | |
691 | return SR_ERR; | |
692 | devc->analog_channels[1] = !strcmp(t_s, "ON") || !strcmp(t_s, "1"); | |
693 | g_free(t_s); | |
694 | sr_dbg("Current analog channel state CH1 %s CH2 %s", | |
695 | devc->analog_channels[0] ? "on" : "off", | |
696 | devc->analog_channels[1] ? "on" : "off"); | |
697 | ||
698 | /* Digital channel state. */ | |
699 | if (devc->model->has_digital) { | |
700 | sr_dbg("Current digital channel state:"); | |
701 | for (i = 0; i < 16; i++) { | |
702 | cmd = g_strdup_printf(":DIG%d:TURN?", i); | |
703 | res = get_cfg_string(sdi, cmd, &t_s); | |
704 | g_free(cmd); | |
705 | if (res != SR_OK) | |
706 | return SR_ERR; | |
707 | devc->digital_channels[i] = !strcmp(t_s, "ON") ? TRUE : FALSE; | |
708 | g_free(t_s); | |
709 | sr_dbg("D%d: %s", i, devc->digital_channels[i] ? "on" : "off"); | |
710 | } | |
711 | } | |
712 | ||
713 | /* Timebase. */ | |
714 | if (get_cfg_float(sdi, ":TIM:SCAL?", &devc->timebase) != SR_OK) | |
715 | return SR_ERR; | |
716 | sr_dbg("Current timebase %g", devc->timebase); | |
717 | ||
718 | /* Vertical gain. */ | |
719 | if (get_cfg_float(sdi, ":CHAN1:SCAL?", &devc->vdiv[0]) != SR_OK) | |
720 | return SR_ERR; | |
721 | if (get_cfg_float(sdi, ":CHAN2:SCAL?", &devc->vdiv[1]) != SR_OK) | |
722 | return SR_ERR; | |
723 | sr_dbg("Current vertical gain CH1 %g CH2 %g", devc->vdiv[0], devc->vdiv[1]); | |
724 | ||
725 | if (devc->model->protocol == PROTOCOL_IEEE488_2) { | |
726 | /* Vertical reference - not certain if this is the place to read it. */ | |
727 | if (sr_scpi_send(sdi->conn, ":WAV:SOUR CHAN1") != SR_OK) | |
728 | return SR_ERR; | |
729 | if (get_cfg_int(sdi, ":WAV:YREF?", &devc->vert_reference[0]) != SR_OK) | |
730 | return SR_ERR; | |
731 | if (sr_scpi_send(sdi->conn, ":WAV:SOUR CHAN2") != SR_OK) | |
732 | return SR_ERR; | |
733 | if (get_cfg_int(sdi, ":WAV:YREF?", &devc->vert_reference[1]) != SR_OK) | |
734 | return SR_ERR; | |
735 | sr_dbg("Current vertical reference CH1 %d CH2 %d", | |
736 | devc->vert_reference[0], devc->vert_reference[1]); | |
737 | } | |
738 | ||
739 | /* Vertical offset. */ | |
740 | if (get_cfg_float(sdi, ":CHAN1:OFFS?", &devc->vert_offset[0]) != SR_OK) | |
741 | return SR_ERR; | |
742 | if (get_cfg_float(sdi, ":CHAN2:OFFS?", &devc->vert_offset[1]) != SR_OK) | |
743 | return SR_ERR; | |
744 | sr_dbg("Current vertical offset CH1 %g CH2 %g", devc->vert_offset[0], | |
745 | devc->vert_offset[1]); | |
746 | ||
747 | /* Coupling. */ | |
748 | if (get_cfg_string(sdi, ":CHAN1:COUP?", &devc->coupling[0]) != SR_OK) | |
749 | return SR_ERR; | |
750 | if (get_cfg_string(sdi, ":CHAN2:COUP?", &devc->coupling[1]) != SR_OK) | |
751 | return SR_ERR; | |
752 | sr_dbg("Current coupling CH1 %s CH2 %s", devc->coupling[0], | |
753 | devc->coupling[1]); | |
754 | ||
755 | /* Trigger source. */ | |
756 | if (get_cfg_string(sdi, ":TRIG:EDGE:SOUR?", &devc->trigger_source) != SR_OK) | |
757 | return SR_ERR; | |
758 | sr_dbg("Current trigger source %s", devc->trigger_source); | |
759 | ||
760 | /* Horizontal trigger position. */ | |
761 | if (get_cfg_float(sdi, ":TIM:OFFS?", &devc->horiz_triggerpos) != SR_OK) | |
762 | return SR_ERR; | |
763 | sr_dbg("Current horizontal trigger position %g", devc->horiz_triggerpos); | |
764 | ||
765 | /* Trigger slope. */ | |
766 | if (get_cfg_string(sdi, ":TRIG:EDGE:SLOP?", &devc->trigger_slope) != SR_OK) | |
767 | return SR_ERR; | |
768 | sr_dbg("Current trigger slope %s", devc->trigger_slope); | |
769 | ||
770 | return SR_OK; | |
771 | } |