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7a396ff5 GS |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2018 Gerhard Sittig <gerhard.sittig@gmx.net> | |
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> | |
3cdad416 GS |
21 | #include <math.h> |
22 | #include <string.h> | |
7a396ff5 GS |
23 | #include "protocol.h" |
24 | ||
3cdad416 GS |
25 | #define WITH_CMD_DELAY 0 /* TODO See which devices need delays. */ |
26 | ||
27 | SR_PRIV void scpi_dmm_cmd_delay(struct sr_scpi_dev_inst *scpi) | |
28 | { | |
29 | if (WITH_CMD_DELAY) | |
30 | g_usleep(WITH_CMD_DELAY * 1000); | |
ddeaa49d PA |
31 | |
32 | if (!scpi->no_opc_command) | |
33 | sr_scpi_get_opc(scpi); | |
3cdad416 GS |
34 | } |
35 | ||
36 | SR_PRIV const struct mqopt_item *scpi_dmm_lookup_mq_number( | |
37 | const struct sr_dev_inst *sdi, enum sr_mq mq, enum sr_mqflag flag) | |
38 | { | |
39 | struct dev_context *devc; | |
40 | size_t i; | |
41 | const struct mqopt_item *item; | |
42 | ||
43 | devc = sdi->priv; | |
44 | for (i = 0; i < devc->model->mqopt_size; i++) { | |
45 | item = &devc->model->mqopts[i]; | |
46 | if (item->mq != mq || item->mqflag != flag) | |
47 | continue; | |
48 | return item; | |
49 | } | |
50 | ||
51 | return NULL; | |
52 | } | |
53 | ||
54 | SR_PRIV const struct mqopt_item *scpi_dmm_lookup_mq_text( | |
55 | const struct sr_dev_inst *sdi, const char *text) | |
56 | { | |
57 | struct dev_context *devc; | |
58 | size_t i; | |
59 | const struct mqopt_item *item; | |
60 | ||
61 | devc = sdi->priv; | |
62 | for (i = 0; i < devc->model->mqopt_size; i++) { | |
63 | item = &devc->model->mqopts[i]; | |
64 | if (!item->scpi_func_query || !item->scpi_func_query[0]) | |
65 | continue; | |
66 | if (!g_str_has_prefix(text, item->scpi_func_query)) | |
67 | continue; | |
68 | return item; | |
69 | } | |
70 | ||
71 | return NULL; | |
72 | } | |
73 | ||
74 | SR_PRIV int scpi_dmm_get_mq(const struct sr_dev_inst *sdi, | |
08f3b427 GS |
75 | enum sr_mq *mq, enum sr_mqflag *flag, char **rsp, |
76 | const struct mqopt_item **mqitem) | |
3cdad416 GS |
77 | { |
78 | struct dev_context *devc; | |
79 | const char *command; | |
80 | char *response; | |
81 | const char *have; | |
82 | int ret; | |
83 | const struct mqopt_item *item; | |
84 | ||
85 | devc = sdi->priv; | |
86 | if (mq) | |
87 | *mq = 0; | |
88 | if (flag) | |
89 | *flag = 0; | |
90 | if (rsp) | |
91 | *rsp = NULL; | |
08f3b427 GS |
92 | if (mqitem) |
93 | *mqitem = NULL; | |
3cdad416 | 94 | |
28877994 | 95 | scpi_dmm_cmd_delay(sdi->conn); |
3cdad416 GS |
96 | command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_QUERY_FUNC); |
97 | if (!command || !*command) | |
98 | return SR_ERR_NA; | |
99 | response = NULL; | |
100 | ret = sr_scpi_get_string(sdi->conn, command, &response); | |
3cdad416 GS |
101 | if (ret != SR_OK) |
102 | return ret; | |
83d38ed9 GS |
103 | if (!response || !*response) { |
104 | g_free(response); | |
3cdad416 | 105 | return SR_ERR_NA; |
83d38ed9 | 106 | } |
3cdad416 GS |
107 | have = response; |
108 | if (*have == '"') | |
109 | have++; | |
110 | ||
111 | ret = SR_ERR_NA; | |
112 | item = scpi_dmm_lookup_mq_text(sdi, have); | |
113 | if (item) { | |
114 | if (mq) | |
115 | *mq = item->mq; | |
116 | if (flag) | |
117 | *flag = item->mqflag; | |
08f3b427 GS |
118 | if (mqitem) |
119 | *mqitem = item; | |
3cdad416 | 120 | ret = SR_OK; |
2111d157 PA |
121 | } else { |
122 | sr_warn("Unknown measurement quantity: %s", have); | |
3cdad416 GS |
123 | } |
124 | ||
125 | if (rsp) { | |
126 | *rsp = response; | |
127 | response = NULL; | |
128 | } | |
129 | g_free(response); | |
130 | ||
131 | return ret; | |
132 | } | |
133 | ||
134 | SR_PRIV int scpi_dmm_set_mq(const struct sr_dev_inst *sdi, | |
135 | enum sr_mq mq, enum sr_mqflag flag) | |
136 | { | |
137 | struct dev_context *devc; | |
138 | const struct mqopt_item *item; | |
139 | const char *mode, *command; | |
140 | int ret; | |
141 | ||
142 | devc = sdi->priv; | |
143 | item = scpi_dmm_lookup_mq_number(sdi, mq, flag); | |
144 | if (!item) | |
145 | return SR_ERR_NA; | |
146 | ||
147 | mode = item->scpi_func_setup; | |
148 | command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_SETUP_FUNC); | |
3cdad416 | 149 | scpi_dmm_cmd_delay(sdi->conn); |
28877994 GS |
150 | ret = sr_scpi_send(sdi->conn, command, mode); |
151 | if (ret != SR_OK) | |
152 | return ret; | |
3cdad416 | 153 | |
28877994 | 154 | return SR_OK; |
3cdad416 GS |
155 | } |
156 | ||
a0418c20 GS |
157 | SR_PRIV const char *scpi_dmm_get_range_text(const struct sr_dev_inst *sdi) |
158 | { | |
159 | struct dev_context *devc; | |
160 | int ret; | |
161 | const struct mqopt_item *mqitem; | |
162 | gboolean is_auto; | |
163 | char *response, *pos; | |
164 | double range; | |
165 | int digits; | |
166 | ||
167 | devc = sdi->priv; | |
168 | ||
169 | ret = scpi_dmm_get_mq(sdi, NULL, NULL, NULL, &mqitem); | |
170 | if (ret != SR_OK) | |
171 | return NULL; | |
172 | if (!mqitem || !mqitem->scpi_func_setup) | |
173 | return NULL; | |
174 | ||
175 | scpi_dmm_cmd_delay(sdi->conn); | |
176 | ret = sr_scpi_cmd(sdi, devc->cmdset, 0, NULL, | |
177 | DMM_CMD_QUERY_RANGE_AUTO, mqitem->scpi_func_setup); | |
178 | if (ret != SR_OK) | |
179 | return NULL; | |
180 | ret = sr_scpi_get_bool(sdi->conn, NULL, &is_auto); | |
181 | if (ret != SR_OK) | |
182 | return NULL; | |
183 | if (is_auto) | |
184 | return "auto"; | |
185 | ||
186 | /* | |
187 | * Get the response into a text buffer. The range value may be | |
188 | * followed by a precision value separated by comma. Common text | |
189 | * to number conversion support code may assume that the input | |
190 | * text spans to the end of the text, need not accept trailing | |
191 | * text which is not part of a number. | |
192 | */ | |
193 | scpi_dmm_cmd_delay(sdi->conn); | |
194 | ret = sr_scpi_cmd(sdi, devc->cmdset, 0, NULL, | |
195 | DMM_CMD_QUERY_RANGE, mqitem->scpi_func_setup); | |
196 | if (ret != SR_OK) | |
197 | return NULL; | |
198 | response = NULL; | |
199 | ret = sr_scpi_get_string(sdi->conn, NULL, &response); | |
200 | if (ret != SR_OK) { | |
201 | g_free(response); | |
202 | return NULL; | |
203 | } | |
204 | pos = strchr(response, ','); | |
205 | if (pos) | |
206 | *pos = '\0'; | |
207 | ret = sr_atod_ascii_digits(response, &range, &digits); | |
208 | g_free(response); | |
209 | if (ret != SR_OK) | |
210 | return NULL; | |
211 | snprintf(devc->range_text, sizeof(devc->range_text), "%lf", range); | |
212 | return devc->range_text; | |
213 | } | |
214 | ||
215 | SR_PRIV int scpi_dmm_set_range_from_text(const struct sr_dev_inst *sdi, | |
216 | const char *range) | |
217 | { | |
218 | struct dev_context *devc; | |
219 | int ret; | |
220 | const struct mqopt_item *item; | |
221 | gboolean is_auto; | |
222 | ||
223 | devc = sdi->priv; | |
224 | ||
225 | if (!range || !*range) | |
226 | return SR_ERR_ARG; | |
227 | ||
228 | ret = scpi_dmm_get_mq(sdi, NULL, NULL, NULL, &item); | |
229 | if (ret != SR_OK) | |
230 | return ret; | |
231 | if (!item || !item->scpi_func_setup) | |
232 | return SR_ERR_ARG; | |
233 | ||
234 | is_auto = g_ascii_strcasecmp(range, "auto") == 0; | |
235 | scpi_dmm_cmd_delay(sdi->conn); | |
236 | ret = sr_scpi_cmd(sdi, devc->cmdset, 0, NULL, | |
237 | is_auto ? DMM_CMD_SETUP_RANGE_AUTO : DMM_CMD_SETUP_RANGE, | |
238 | item->scpi_func_setup, is_auto ? "" : range); | |
239 | if (ret != SR_OK) | |
240 | return ret; | |
241 | ||
242 | return SR_OK; | |
243 | } | |
244 | ||
245 | SR_PRIV GVariant *scpi_dmm_get_range_text_list(const struct sr_dev_inst *sdi) | |
246 | { | |
247 | GVariantBuilder gvb; | |
248 | GVariant *list; | |
249 | ||
250 | (void)sdi; | |
251 | ||
252 | g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY); | |
253 | /* TODO | |
254 | * Add more items _when_ the connected device supports a fixed | |
255 | * or known set of ranges. The Agilent protocol is flexible and | |
256 | * tolerant, set requests accept any value, and the device will | |
257 | * use an upper limit which is at least the specified value. | |
258 | * The values are communicated as mere numbers without units. | |
259 | */ | |
260 | list = g_variant_builder_end(&gvb); | |
261 | ||
262 | return list; | |
263 | } | |
264 | ||
3cdad416 GS |
265 | SR_PRIV int scpi_dmm_get_meas_agilent(const struct sr_dev_inst *sdi, size_t ch) |
266 | { | |
267 | struct sr_scpi_dev_inst *scpi; | |
268 | struct dev_context *devc; | |
269 | struct scpi_dmm_acq_info *info; | |
270 | struct sr_datafeed_analog *analog; | |
271 | int ret; | |
272 | enum sr_mq mq; | |
273 | enum sr_mqflag mqflag; | |
274 | char *mode_response; | |
275 | const char *p; | |
276 | char **fields; | |
277 | size_t count; | |
278 | char prec_text[20]; | |
279 | const struct mqopt_item *item; | |
280 | int prec_exp; | |
281 | const char *command; | |
282 | char *response; | |
283 | gboolean use_double; | |
284 | int sig_digits, val_exp; | |
285 | int digits; | |
286 | enum sr_unit unit; | |
395c1850 | 287 | double limit; |
3cdad416 GS |
288 | |
289 | scpi = sdi->conn; | |
290 | devc = sdi->priv; | |
291 | info = &devc->run_acq_info; | |
292 | analog = &info->analog[ch]; | |
293 | ||
294 | /* | |
295 | * Get the meter's current mode, keep the response around. | |
296 | * Skip the measurement if the mode is uncertain. | |
297 | */ | |
08f3b427 | 298 | ret = scpi_dmm_get_mq(sdi, &mq, &mqflag, &mode_response, &item); |
3cdad416 GS |
299 | if (ret != SR_OK) { |
300 | g_free(mode_response); | |
301 | return ret; | |
302 | } | |
303 | if (!mode_response) | |
304 | return SR_ERR; | |
305 | if (!mq) { | |
306 | g_free(mode_response); | |
307 | return +1; | |
308 | } | |
309 | ||
310 | /* | |
311 | * Get the last comma separated field of the function query | |
312 | * response, or fallback to the model's default precision for | |
313 | * the current function. This copes with either of these cases: | |
314 | * VOLT +1.00000E-01,+1.00000E-06 | |
315 | * DIOD | |
316 | * TEMP THER,5000,+1.00000E+00,+1.00000E-01 | |
317 | */ | |
318 | p = sr_scpi_unquote_string(mode_response); | |
319 | fields = g_strsplit(p, ",", 0); | |
320 | count = g_strv_length(fields); | |
321 | if (count >= 2) { | |
322 | snprintf(prec_text, sizeof(prec_text), | |
323 | "%s", fields[count - 1]); | |
324 | p = prec_text; | |
08f3b427 GS |
325 | } else if (!item) { |
326 | p = NULL; | |
327 | } else if (item->default_precision == NO_DFLT_PREC) { | |
328 | p = NULL; | |
3cdad416 | 329 | } else { |
08f3b427 GS |
330 | snprintf(prec_text, sizeof(prec_text), |
331 | "1e%d", item->default_precision); | |
332 | p = prec_text; | |
3cdad416 GS |
333 | } |
334 | g_strfreev(fields); | |
335 | ||
336 | /* | |
337 | * Need to extract the exponent value ourselves, since a strtod() | |
338 | * call will "eat" the exponent, too. Strip space, strip sign, | |
339 | * strip float number (without! exponent), check for exponent | |
340 | * and get exponent value. Accept absence of Esnn suffixes. | |
341 | */ | |
342 | while (p && *p && g_ascii_isspace(*p)) | |
343 | p++; | |
344 | if (p && *p && (*p == '+' || *p == '-')) | |
345 | p++; | |
346 | while (p && *p && g_ascii_isdigit(*p)) | |
347 | p++; | |
348 | if (p && *p && *p == '.') | |
349 | p++; | |
350 | while (p && *p && g_ascii_isdigit(*p)) | |
351 | p++; | |
352 | ret = SR_OK; | |
353 | if (!p || !*p) | |
354 | prec_exp = 0; | |
355 | else if (*p != 'e' && *p != 'E') | |
356 | ret = SR_ERR_DATA; | |
357 | else | |
358 | ret = sr_atoi(++p, &prec_exp); | |
359 | g_free(mode_response); | |
360 | if (ret != SR_OK) | |
361 | return ret; | |
362 | ||
363 | /* | |
364 | * Get the measurement value. Make sure to strip trailing space | |
365 | * or else number conversion may fail in fatal ways. Detect OL | |
366 | * conditions. Determine the measurement's precision: Count the | |
367 | * number of significant digits before the period, and get the | |
368 | * exponent's value. | |
369 | * | |
370 | * The text presentation of values is like this: | |
371 | * +1.09450000E-01 | |
372 | * Skip space/sign, count digits before the period, skip to the | |
373 | * exponent, get exponent value. | |
374 | * | |
375 | * TODO Can sr_parse_rational() return the exponent for us? In | |
376 | * addition to providing a precise rational value instead of a | |
377 | * float that's an approximation of the received value? Can the | |
378 | * 'analog' struct that we fill in carry rationals? | |
379 | * | |
380 | * Use double precision FP here during conversion. Optionally | |
381 | * downgrade to single precision later to reduce the amount of | |
382 | * logged information. | |
383 | */ | |
384 | command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_QUERY_VALUE); | |
385 | if (!command || !*command) | |
386 | return SR_ERR_NA; | |
3cdad416 | 387 | scpi_dmm_cmd_delay(scpi); |
28877994 | 388 | ret = sr_scpi_get_string(scpi, command, &response); |
3cdad416 GS |
389 | if (ret != SR_OK) |
390 | return ret; | |
391 | g_strstrip(response); | |
392 | use_double = devc->model->digits > 6; | |
393 | ret = sr_atod_ascii(response, &info->d_value); | |
394 | if (ret != SR_OK) { | |
395 | g_free(response); | |
396 | return ret; | |
397 | } | |
398 | if (!response) | |
399 | return SR_ERR; | |
395c1850 GS |
400 | limit = 9e37; |
401 | if (info->d_value > +limit) { | |
3cdad416 | 402 | info->d_value = +INFINITY; |
395c1850 | 403 | } else if (info->d_value < -limit) { |
3cdad416 GS |
404 | info->d_value = -INFINITY; |
405 | } else { | |
406 | p = response; | |
407 | while (p && *p && g_ascii_isspace(*p)) | |
408 | p++; | |
409 | if (p && *p && (*p == '-' || *p == '+')) | |
410 | p++; | |
411 | sig_digits = 0; | |
412 | while (p && *p && g_ascii_isdigit(*p)) { | |
413 | sig_digits++; | |
414 | p++; | |
415 | } | |
416 | if (p && *p && *p == '.') | |
417 | p++; | |
418 | while (p && *p && g_ascii_isdigit(*p)) | |
419 | p++; | |
420 | ret = SR_OK; | |
421 | if (!p || !*p) | |
422 | val_exp = 0; | |
423 | else if (*p != 'e' && *p != 'E') | |
424 | ret = SR_ERR_DATA; | |
425 | else | |
426 | ret = sr_atoi(++p, &val_exp); | |
427 | } | |
428 | g_free(response); | |
429 | if (ret != SR_OK) | |
430 | return ret; | |
431 | /* | |
432 | * TODO Come up with the most appropriate 'digits' calculation. | |
433 | * This implementation assumes that either the device provides | |
434 | * the resolution with the query for the meter's function, or | |
435 | * the driver uses a fallback text pretending the device had | |
436 | * provided it. This works with supported Agilent devices. | |
437 | * | |
438 | * An alternative may be to assume a given digits count which | |
439 | * depends on the device, and adjust that count based on the | |
440 | * value's significant digits and exponent. But this approach | |
441 | * fails if devices change their digits count depending on | |
442 | * modes or user requests, and also fails when e.g. devices | |
443 | * with "100000 counts" can provide values between 100000 and | |
444 | * 120000 in either 4 or 5 digits modes, depending on the most | |
445 | * recent trend of the values. This less robust approach should | |
446 | * only be taken if the mode inquiry won't yield the resolution | |
447 | * (as e.g. DIOD does on 34405A, though we happen to know the | |
448 | * fixed resolution for this very mode on this very model). | |
449 | * | |
450 | * For now, let's keep the prepared code path for the second | |
451 | * approach in place, should some Agilent devices need it yet | |
452 | * benefit from re-using most of the remaining acquisition | |
453 | * routine. | |
454 | */ | |
455 | #if 1 | |
456 | digits = -prec_exp; | |
457 | #else | |
458 | digits = devc->model->digits; | |
459 | digits -= sig_digits; | |
460 | digits -= val_exp; | |
461 | #endif | |
462 | ||
463 | /* | |
464 | * Fill in the 'analog' description: value, encoding, meaning. | |
465 | * Callers will fill in the sample count, and channel name, | |
466 | * and will send out the packet. | |
467 | */ | |
468 | if (use_double) { | |
469 | analog->data = &info->d_value; | |
470 | analog->encoding->unitsize = sizeof(info->d_value); | |
471 | } else { | |
472 | info->f_value = info->d_value; | |
473 | analog->data = &info->f_value; | |
474 | analog->encoding->unitsize = sizeof(info->f_value); | |
475 | } | |
3cdad416 GS |
476 | analog->encoding->digits = digits; |
477 | analog->meaning->mq = mq; | |
478 | analog->meaning->mqflags = mqflag; | |
479 | switch (mq) { | |
480 | case SR_MQ_VOLTAGE: | |
481 | unit = SR_UNIT_VOLT; | |
482 | break; | |
483 | case SR_MQ_CURRENT: | |
484 | unit = SR_UNIT_AMPERE; | |
485 | break; | |
486 | case SR_MQ_RESISTANCE: | |
487 | case SR_MQ_CONTINUITY: | |
488 | unit = SR_UNIT_OHM; | |
489 | break; | |
490 | case SR_MQ_CAPACITANCE: | |
491 | unit = SR_UNIT_FARAD; | |
492 | break; | |
493 | case SR_MQ_TEMPERATURE: | |
494 | unit = SR_UNIT_CELSIUS; | |
495 | break; | |
496 | case SR_MQ_FREQUENCY: | |
497 | unit = SR_UNIT_HERTZ; | |
498 | break; | |
a1619831 AG |
499 | case SR_MQ_TIME: |
500 | unit = SR_UNIT_SECOND; | |
501 | break; | |
3cdad416 GS |
502 | default: |
503 | return SR_ERR_NA; | |
504 | } | |
505 | analog->meaning->unit = unit; | |
506 | analog->spec->spec_digits = digits; | |
507 | ||
508 | return SR_OK; | |
509 | } | |
510 | ||
d0b602f0 TK |
511 | SR_PRIV int scpi_dmm_get_meas_gwinstek(const struct sr_dev_inst *sdi, size_t ch) |
512 | { | |
513 | struct sr_scpi_dev_inst *scpi; | |
514 | struct dev_context *devc; | |
515 | struct scpi_dmm_acq_info *info; | |
516 | struct sr_datafeed_analog *analog; | |
517 | int ret; | |
518 | enum sr_mq mq; | |
519 | enum sr_mqflag mqflag; | |
520 | char *mode_response; | |
521 | const char *p; | |
522 | const struct mqopt_item *item; | |
523 | const char *command; | |
524 | char *response; | |
525 | gboolean use_double; | |
33aa8117 | 526 | double limit; |
d0b602f0 TK |
527 | int sig_digits, val_exp; |
528 | int digits; | |
529 | enum sr_unit unit; | |
530 | int mmode; | |
531 | ||
532 | scpi = sdi->conn; | |
533 | devc = sdi->priv; | |
534 | info = &devc->run_acq_info; | |
535 | analog = &info->analog[ch]; | |
536 | ||
537 | /* | |
538 | * Get the meter's current mode, keep the response around. | |
539 | * Skip the measurement if the mode is uncertain. | |
540 | */ | |
541 | ret = scpi_dmm_get_mq(sdi, &mq, &mqflag, &mode_response, &item); | |
542 | if (ret != SR_OK) { | |
543 | g_free(mode_response); | |
544 | return ret; | |
545 | } | |
546 | if (!mode_response) | |
547 | return SR_ERR; | |
548 | if (!mq) { | |
549 | g_free(mode_response); | |
550 | return +1; | |
551 | } | |
552 | mmode = atoi(mode_response); | |
553 | g_free(mode_response); | |
554 | ||
555 | /* | |
556 | * Get the current reading from the meter. | |
557 | */ | |
558 | scpi_dmm_cmd_delay(scpi); | |
559 | command = sr_scpi_cmd_get(devc->cmdset, DMM_CMD_QUERY_VALUE); | |
560 | if (!command || !*command) | |
561 | return SR_ERR_NA; | |
562 | scpi_dmm_cmd_delay(scpi); | |
563 | ret = sr_scpi_get_string(scpi, command, &response); | |
564 | if (ret != SR_OK) | |
565 | return ret; | |
566 | g_strstrip(response); | |
567 | use_double = devc->model->digits > 6; | |
568 | ret = sr_atod_ascii(response, &info->d_value); | |
569 | if (ret != SR_OK) { | |
570 | g_free(response); | |
571 | return ret; | |
572 | } | |
573 | if (!response) | |
574 | return SR_ERR; | |
395c1850 | 575 | limit = 9e37; |
33306b13 PA |
576 | if (devc->model->infinity_limit != 0.0) |
577 | limit = devc->model->infinity_limit; | |
578 | if (info->d_value >= +limit) { | |
d0b602f0 | 579 | info->d_value = +INFINITY; |
33306b13 | 580 | } else if (info->d_value <= -limit) { |
d0b602f0 TK |
581 | info->d_value = -INFINITY; |
582 | } else { | |
583 | p = response; | |
584 | while (p && *p && g_ascii_isspace(*p)) | |
585 | p++; | |
586 | if (p && *p && (*p == '-' || *p == '+')) | |
587 | p++; | |
588 | sig_digits = 0; | |
589 | while (p && *p && g_ascii_isdigit(*p)) { | |
590 | sig_digits++; | |
591 | p++; | |
592 | } | |
593 | if (p && *p && *p == '.') | |
594 | p++; | |
595 | while (p && *p && g_ascii_isdigit(*p)) | |
596 | p++; | |
597 | ret = SR_OK; | |
598 | if (!p || !*p) | |
599 | val_exp = 0; | |
600 | else if (*p != 'e' && *p != 'E') | |
601 | ret = SR_ERR_DATA; | |
602 | else | |
603 | ret = sr_atoi(++p, &val_exp); | |
604 | } | |
605 | g_free(response); | |
606 | if (ret != SR_OK) | |
607 | return ret; | |
608 | ||
609 | /* | |
33aa8117 | 610 | * Make sure we report "INFINITY" when meter displays "0L". |
d0b602f0 TK |
611 | */ |
612 | switch (mmode) { | |
613 | case 7: | |
614 | case 16: | |
33aa8117 | 615 | /* In resitance modes 0L reads as 1.20000E8 or 1.99999E8. */ |
395c1850 | 616 | limit = 1.2e8; |
33aa8117 GS |
617 | if (strcmp(devc->model->model, "GDM8255A") == 0) |
618 | limit = 1.99999e8; | |
33aa8117 GS |
619 | if (info->d_value >= limit) |
620 | info->d_value = +INFINITY; | |
d0b602f0 TK |
621 | break; |
622 | case 13: | |
33aa8117 | 623 | /* In continuity mode 0L reads as 1.20000E3. */ |
d0b602f0 TK |
624 | if (info->d_value >= 1.2e3) |
625 | info->d_value = +INFINITY; | |
626 | break; | |
627 | case 17: | |
33aa8117 | 628 | /* In diode mode 0L reads as 1.00000E0. */ |
d0b602f0 TK |
629 | if (info->d_value == 1.0e0) |
630 | info->d_value = +INFINITY; | |
631 | break; | |
632 | } | |
633 | ||
634 | /* | |
33aa8117 GS |
635 | * Calculate 'digits' based on the result of the optional |
636 | * precision reading which was done at acquisition start. | |
637 | * The GW-Instek manual gives the following information | |
638 | * regarding the resolution: | |
d0b602f0 | 639 | * |
33aa8117 GS |
640 | * Type Digit |
641 | * -------- ------ | |
642 | * Slow 5 1/2 | |
643 | * Medium 4 1/2 | |
644 | * Fast 3 1/2 | |
d0b602f0 | 645 | */ |
d0b602f0 TK |
646 | digits = devc->model->digits; |
647 | if (devc->precision && *devc->precision) { | |
33aa8117 | 648 | if (g_str_has_prefix(devc->precision, "Slow")) |
d0b602f0 | 649 | digits = 6; |
33aa8117 | 650 | else if (g_str_has_prefix(devc->precision, "Mid")) |
d0b602f0 | 651 | digits = 5; |
33aa8117 | 652 | else if (g_str_has_prefix(devc->precision, "Fast")) |
d0b602f0 TK |
653 | digits = 4; |
654 | else | |
33aa8117 | 655 | sr_info("Unknown precision: '%s'", devc->precision); |
d0b602f0 TK |
656 | } |
657 | ||
658 | /* | |
659 | * Fill in the 'analog' description: value, encoding, meaning. | |
660 | * Callers will fill in the sample count, and channel name, | |
661 | * and will send out the packet. | |
662 | */ | |
663 | if (use_double) { | |
664 | analog->data = &info->d_value; | |
665 | analog->encoding->unitsize = sizeof(info->d_value); | |
666 | } else { | |
667 | info->f_value = info->d_value; | |
668 | analog->data = &info->f_value; | |
669 | analog->encoding->unitsize = sizeof(info->f_value); | |
670 | } | |
d0b602f0 TK |
671 | analog->encoding->digits = digits; |
672 | analog->meaning->mq = mq; | |
673 | analog->meaning->mqflags = mqflag; | |
674 | switch (mq) { | |
675 | case SR_MQ_VOLTAGE: | |
676 | unit = SR_UNIT_VOLT; | |
677 | break; | |
678 | case SR_MQ_CURRENT: | |
679 | unit = SR_UNIT_AMPERE; | |
680 | break; | |
681 | case SR_MQ_RESISTANCE: | |
682 | case SR_MQ_CONTINUITY: | |
683 | unit = SR_UNIT_OHM; | |
684 | break; | |
685 | case SR_MQ_CAPACITANCE: | |
686 | unit = SR_UNIT_FARAD; | |
687 | break; | |
688 | case SR_MQ_TEMPERATURE: | |
689 | switch (mmode) { | |
690 | case 15: | |
691 | unit = SR_UNIT_FAHRENHEIT; | |
692 | break; | |
693 | case 9: | |
694 | default: | |
695 | unit = SR_UNIT_CELSIUS; | |
696 | } | |
697 | break; | |
698 | case SR_MQ_FREQUENCY: | |
699 | unit = SR_UNIT_HERTZ; | |
700 | break; | |
701 | case SR_MQ_TIME: | |
702 | unit = SR_UNIT_SECOND; | |
703 | break; | |
704 | default: | |
705 | return SR_ERR_NA; | |
706 | } | |
707 | analog->meaning->unit = unit; | |
708 | analog->spec->spec_digits = digits; | |
709 | ||
710 | return SR_OK; | |
711 | } | |
712 | ||
3cdad416 | 713 | /* Strictly speaking this is a timer controlled poll routine. */ |
7a396ff5 GS |
714 | SR_PRIV int scpi_dmm_receive_data(int fd, int revents, void *cb_data) |
715 | { | |
3cdad416 GS |
716 | struct sr_dev_inst *sdi; |
717 | struct sr_scpi_dev_inst *scpi; | |
7a396ff5 | 718 | struct dev_context *devc; |
3cdad416 GS |
719 | struct scpi_dmm_acq_info *info; |
720 | gboolean sent_sample; | |
721 | size_t ch; | |
722 | struct sr_channel *channel; | |
723 | int ret; | |
7a396ff5 GS |
724 | |
725 | (void)fd; | |
3cdad416 | 726 | (void)revents; |
7a396ff5 | 727 | |
3cdad416 GS |
728 | sdi = cb_data; |
729 | if (!sdi) | |
7a396ff5 | 730 | return TRUE; |
3cdad416 GS |
731 | scpi = sdi->conn; |
732 | devc = sdi->priv; | |
733 | if (!scpi || !devc) | |
7a396ff5 | 734 | return TRUE; |
3cdad416 GS |
735 | info = &devc->run_acq_info; |
736 | ||
737 | sent_sample = FALSE; | |
738 | ret = SR_OK; | |
739 | for (ch = 0; ch < devc->num_channels; ch++) { | |
740 | /* Check the channel's enabled status. */ | |
741 | channel = g_slist_nth_data(sdi->channels, ch); | |
742 | if (!channel->enabled) | |
743 | continue; | |
744 | ||
745 | /* | |
746 | * Prepare an analog measurement value. Note that digits | |
747 | * will get updated later. | |
748 | */ | |
749 | info->packet.type = SR_DF_ANALOG; | |
750 | info->packet.payload = &info->analog[ch]; | |
751 | sr_analog_init(&info->analog[ch], &info->encoding[ch], | |
752 | &info->meaning[ch], &info->spec[ch], 0); | |
753 | ||
754 | /* Just check OPC before sending another request. */ | |
755 | scpi_dmm_cmd_delay(sdi->conn); | |
7a396ff5 | 756 | |
3cdad416 GS |
757 | /* |
758 | * Have the model take and interpret a measurement. Lack | |
759 | * of support is pointless, failed retrieval/conversion | |
760 | * is considered fatal. The routine will fill in the | |
761 | * 'analog' details, except for channel name and sample | |
762 | * count (assume one value per channel). | |
763 | * | |
764 | * Note that non-zero non-negative return codes signal | |
765 | * that the channel's data shell get skipped in this | |
766 | * iteration over the channels. This copes with devices | |
767 | * or modes where channels may provide data at different | |
768 | * rates. | |
769 | */ | |
770 | if (!devc->model->get_measurement) { | |
771 | ret = SR_ERR_NA; | |
772 | break; | |
773 | } | |
774 | ret = devc->model->get_measurement(sdi, ch); | |
775 | if (ret > 0) | |
776 | continue; | |
777 | if (ret != SR_OK) | |
778 | break; | |
779 | ||
780 | /* Send the packet that was filled in by the model's routine. */ | |
781 | info->analog[ch].num_samples = 1; | |
782 | info->analog[ch].meaning->channels = g_slist_append(NULL, channel); | |
783 | sr_session_send(sdi, &info->packet); | |
784 | g_slist_free(info->analog[ch].meaning->channels); | |
785 | sent_sample = TRUE; | |
786 | } | |
787 | if (sent_sample) | |
788 | sr_sw_limits_update_samples_read(&devc->limits, 1); | |
789 | if (ret != SR_OK) { | |
790 | /* Stop acquisition upon communication or data errors. */ | |
791 | sr_dev_acquisition_stop(sdi); | |
792 | return TRUE; | |
7a396ff5 | 793 | } |
3cdad416 GS |
794 | if (sr_sw_limits_check(&devc->limits)) |
795 | sr_dev_acquisition_stop(sdi); | |
7a396ff5 GS |
796 | |
797 | return TRUE; | |
798 | } |