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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Bert Vermeulen <bert@biot.com> | |
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 <stdlib.h> | |
22 | #include <math.h> | |
23 | #include <string.h> | |
24 | #include <glib.h> | |
25 | #include <libsigrok/libsigrok.h> | |
26 | #include "libsigrok-internal.h" | |
27 | #include "fluke-dmm.h" | |
28 | ||
29 | static struct sr_datafeed_analog_old *handle_qm_18x(const struct sr_dev_inst *sdi, | |
30 | char **tokens) | |
31 | { | |
32 | struct sr_datafeed_analog_old *analog; | |
33 | float fvalue; | |
34 | char *e, *u; | |
35 | gboolean is_oor; | |
36 | ||
37 | if (strcmp(tokens[0], "QM") || !tokens[1]) | |
38 | return NULL; | |
39 | ||
40 | if ((e = strstr(tokens[1], "Out of range"))) { | |
41 | is_oor = TRUE; | |
42 | fvalue = -1; | |
43 | while (*e && *e != '.') | |
44 | e++; | |
45 | } else { | |
46 | is_oor = FALSE; | |
47 | /* Delimit the float, since sr_atof_ascii() wants only | |
48 | * a valid float here. */ | |
49 | e = tokens[1]; | |
50 | while (*e && *e != ' ') | |
51 | e++; | |
52 | *e++ = '\0'; | |
53 | if (sr_atof_ascii(tokens[1], &fvalue) != SR_OK || fvalue == 0.0) { | |
54 | /* Happens all the time, when switching modes. */ | |
55 | sr_dbg("Invalid float."); | |
56 | return NULL; | |
57 | } | |
58 | } | |
59 | while (*e && *e == ' ') | |
60 | e++; | |
61 | ||
62 | analog = g_malloc0(sizeof(struct sr_datafeed_analog_old)); | |
63 | analog->data = g_malloc(sizeof(float)); | |
64 | analog->channels = sdi->channels; | |
65 | analog->num_samples = 1; | |
66 | if (is_oor) | |
67 | *analog->data = NAN; | |
68 | else | |
69 | *analog->data = fvalue; | |
70 | analog->mq = -1; | |
71 | ||
72 | if ((u = strstr(e, "V DC")) || (u = strstr(e, "V AC"))) { | |
73 | analog->mq = SR_MQ_VOLTAGE; | |
74 | analog->unit = SR_UNIT_VOLT; | |
75 | if (!is_oor && e[0] == 'm') | |
76 | *analog->data /= 1000; | |
77 | /* This catches "V AC", "V DC" and "V AC+DC". */ | |
78 | if (strstr(u, "AC")) | |
79 | analog->mqflags |= SR_MQFLAG_AC | SR_MQFLAG_RMS; | |
80 | if (strstr(u, "DC")) | |
81 | analog->mqflags |= SR_MQFLAG_DC; | |
82 | } else if ((u = strstr(e, "dBV")) || (u = strstr(e, "dBm"))) { | |
83 | analog->mq = SR_MQ_VOLTAGE; | |
84 | if (u[2] == 'm') | |
85 | analog->unit = SR_UNIT_DECIBEL_MW; | |
86 | else | |
87 | analog->unit = SR_UNIT_DECIBEL_VOLT; | |
88 | analog->mqflags |= SR_MQFLAG_AC | SR_MQFLAG_RMS; | |
89 | } else if ((u = strstr(e, "Ohms"))) { | |
90 | analog->mq = SR_MQ_RESISTANCE; | |
91 | analog->unit = SR_UNIT_OHM; | |
92 | if (is_oor) | |
93 | *analog->data = INFINITY; | |
94 | else if (e[0] == 'k') | |
95 | *analog->data *= 1000; | |
96 | else if (e[0] == 'M') | |
97 | *analog->data *= 1000000; | |
98 | } else if (!strcmp(e, "nS")) { | |
99 | analog->mq = SR_MQ_CONDUCTANCE; | |
100 | analog->unit = SR_UNIT_SIEMENS; | |
101 | *analog->data /= 1e+9; | |
102 | } else if ((u = strstr(e, "Farads"))) { | |
103 | analog->mq = SR_MQ_CAPACITANCE; | |
104 | analog->unit = SR_UNIT_FARAD; | |
105 | if (!is_oor) { | |
106 | if (e[0] == 'm') | |
107 | *analog->data /= 1e+3; | |
108 | else if (e[0] == 'u') | |
109 | *analog->data /= 1e+6; | |
110 | else if (e[0] == 'n') | |
111 | *analog->data /= 1e+9; | |
112 | } | |
113 | } else if ((u = strstr(e, "Deg C")) || (u = strstr(e, "Deg F"))) { | |
114 | analog->mq = SR_MQ_TEMPERATURE; | |
115 | if (u[4] == 'C') | |
116 | analog->unit = SR_UNIT_CELSIUS; | |
117 | else | |
118 | analog->unit = SR_UNIT_FAHRENHEIT; | |
119 | } else if ((u = strstr(e, "A AC")) || (u = strstr(e, "A DC"))) { | |
120 | analog->mq = SR_MQ_CURRENT; | |
121 | analog->unit = SR_UNIT_AMPERE; | |
122 | /* This catches "A AC", "A DC" and "A AC+DC". */ | |
123 | if (strstr(u, "AC")) | |
124 | analog->mqflags |= SR_MQFLAG_AC | SR_MQFLAG_RMS; | |
125 | if (strstr(u, "DC")) | |
126 | analog->mqflags |= SR_MQFLAG_DC; | |
127 | if (!is_oor) { | |
128 | if (e[0] == 'm') | |
129 | *analog->data /= 1e+3; | |
130 | else if (e[0] == 'u') | |
131 | *analog->data /= 1e+6; | |
132 | } | |
133 | } else if ((u = strstr(e, "Hz"))) { | |
134 | analog->mq = SR_MQ_FREQUENCY; | |
135 | analog->unit = SR_UNIT_HERTZ; | |
136 | if (e[0] == 'k') | |
137 | *analog->data *= 1e+3; | |
138 | } else if (!strcmp(e, "%")) { | |
139 | analog->mq = SR_MQ_DUTY_CYCLE; | |
140 | analog->unit = SR_UNIT_PERCENTAGE; | |
141 | } else if ((u = strstr(e, "ms"))) { | |
142 | analog->mq = SR_MQ_PULSE_WIDTH; | |
143 | analog->unit = SR_UNIT_SECOND; | |
144 | *analog->data /= 1e+3; | |
145 | } | |
146 | ||
147 | if (analog->mq == -1) { | |
148 | /* Not a valid measurement. */ | |
149 | g_free(analog->data); | |
150 | g_free(analog); | |
151 | analog = NULL; | |
152 | } | |
153 | ||
154 | return analog; | |
155 | } | |
156 | ||
157 | static struct sr_datafeed_analog_old *handle_qm_28x(const struct sr_dev_inst *sdi, | |
158 | char **tokens) | |
159 | { | |
160 | struct sr_datafeed_analog_old *analog; | |
161 | float fvalue; | |
162 | ||
163 | if (!tokens[1]) | |
164 | return NULL; | |
165 | ||
166 | if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK || fvalue == 0.0) { | |
167 | sr_err("Invalid float '%s'.", tokens[0]); | |
168 | return NULL; | |
169 | } | |
170 | ||
171 | analog = g_malloc0(sizeof(struct sr_datafeed_analog_old)); | |
172 | analog->data = g_malloc(sizeof(float)); | |
173 | analog->channels = sdi->channels; | |
174 | analog->num_samples = 1; | |
175 | *analog->data = fvalue; | |
176 | analog->mq = -1; | |
177 | ||
178 | if (!strcmp(tokens[1], "VAC") || !strcmp(tokens[1], "VDC")) { | |
179 | analog->mq = SR_MQ_VOLTAGE; | |
180 | analog->unit = SR_UNIT_VOLT; | |
181 | if (!strcmp(tokens[2], "NORMAL")) { | |
182 | if (tokens[1][1] == 'A') { | |
183 | analog->mqflags |= SR_MQFLAG_AC; | |
184 | analog->mqflags |= SR_MQFLAG_RMS; | |
185 | } else | |
186 | analog->mqflags |= SR_MQFLAG_DC; | |
187 | } else if (!strcmp(tokens[2], "OL") || !strcmp(tokens[2], "OL_MINUS")) { | |
188 | *analog->data = NAN; | |
189 | } else | |
190 | analog->mq = -1; | |
191 | } else if (!strcmp(tokens[1], "dBV") || !strcmp(tokens[1], "dBm")) { | |
192 | analog->mq = SR_MQ_VOLTAGE; | |
193 | if (tokens[1][2] == 'm') | |
194 | analog->unit = SR_UNIT_DECIBEL_MW; | |
195 | else | |
196 | analog->unit = SR_UNIT_DECIBEL_VOLT; | |
197 | analog->mqflags |= SR_MQFLAG_AC | SR_MQFLAG_RMS; | |
198 | } else if (!strcmp(tokens[1], "CEL") || !strcmp(tokens[1], "FAR")) { | |
199 | if (!strcmp(tokens[2], "NORMAL")) { | |
200 | analog->mq = SR_MQ_TEMPERATURE; | |
201 | if (tokens[1][0] == 'C') | |
202 | analog->unit = SR_UNIT_CELSIUS; | |
203 | else | |
204 | analog->unit = SR_UNIT_FAHRENHEIT; | |
205 | } | |
206 | } else if (!strcmp(tokens[1], "OHM")) { | |
207 | if (!strcmp(tokens[3], "NONE")) { | |
208 | analog->mq = SR_MQ_RESISTANCE; | |
209 | analog->unit = SR_UNIT_OHM; | |
210 | if (!strcmp(tokens[2], "OL") || !strcmp(tokens[2], "OL_MINUS")) { | |
211 | *analog->data = INFINITY; | |
212 | } else if (strcmp(tokens[2], "NORMAL")) | |
213 | analog->mq = -1; | |
214 | } else if (!strcmp(tokens[3], "OPEN_CIRCUIT")) { | |
215 | analog->mq = SR_MQ_CONTINUITY; | |
216 | analog->unit = SR_UNIT_BOOLEAN; | |
217 | *analog->data = 0.0; | |
218 | } else if (!strcmp(tokens[3], "SHORT_CIRCUIT")) { | |
219 | analog->mq = SR_MQ_CONTINUITY; | |
220 | analog->unit = SR_UNIT_BOOLEAN; | |
221 | *analog->data = 1.0; | |
222 | } | |
223 | } else if (!strcmp(tokens[1], "F") | |
224 | && !strcmp(tokens[2], "NORMAL") | |
225 | && !strcmp(tokens[3], "NONE")) { | |
226 | analog->mq = SR_MQ_CAPACITANCE; | |
227 | analog->unit = SR_UNIT_FARAD; | |
228 | } else if (!strcmp(tokens[1], "AAC") || !strcmp(tokens[1], "ADC")) { | |
229 | analog->mq = SR_MQ_CURRENT; | |
230 | analog->unit = SR_UNIT_AMPERE; | |
231 | if (!strcmp(tokens[2], "NORMAL")) { | |
232 | if (tokens[1][1] == 'A') { | |
233 | analog->mqflags |= SR_MQFLAG_AC; | |
234 | analog->mqflags |= SR_MQFLAG_RMS; | |
235 | } else | |
236 | analog->mqflags |= SR_MQFLAG_DC; | |
237 | } else if (!strcmp(tokens[2], "OL") || !strcmp(tokens[2], "OL_MINUS")) { | |
238 | *analog->data = NAN; | |
239 | } else | |
240 | analog->mq = -1; | |
241 | } if (!strcmp(tokens[1], "Hz") && !strcmp(tokens[2], "NORMAL")) { | |
242 | analog->mq = SR_MQ_FREQUENCY; | |
243 | analog->unit = SR_UNIT_HERTZ; | |
244 | } else if (!strcmp(tokens[1], "PCT") && !strcmp(tokens[2], "NORMAL")) { | |
245 | analog->mq = SR_MQ_DUTY_CYCLE; | |
246 | analog->unit = SR_UNIT_PERCENTAGE; | |
247 | } else if (!strcmp(tokens[1], "S") && !strcmp(tokens[2], "NORMAL")) { | |
248 | analog->mq = SR_MQ_PULSE_WIDTH; | |
249 | analog->unit = SR_UNIT_SECOND; | |
250 | } else if (!strcmp(tokens[1], "SIE") && !strcmp(tokens[2], "NORMAL")) { | |
251 | analog->mq = SR_MQ_CONDUCTANCE; | |
252 | analog->unit = SR_UNIT_SIEMENS; | |
253 | } | |
254 | ||
255 | if (analog->mq == -1) { | |
256 | /* Not a valid measurement. */ | |
257 | g_free(analog->data); | |
258 | g_free(analog); | |
259 | analog = NULL; | |
260 | } | |
261 | ||
262 | return analog; | |
263 | } | |
264 | ||
265 | static void handle_qm_19x_meta(const struct sr_dev_inst *sdi, char **tokens) | |
266 | { | |
267 | struct dev_context *devc; | |
268 | int meas_type, meas_unit, meas_char, i; | |
269 | ||
270 | /* Make sure we have 7 valid tokens. */ | |
271 | for (i = 0; tokens[i] && i < 7; i++); | |
272 | if (i != 7) | |
273 | return; | |
274 | ||
275 | if (strcmp(tokens[1], "1")) | |
276 | /* Invalid measurement. */ | |
277 | return; | |
278 | ||
279 | if (strcmp(tokens[2], "3")) | |
280 | /* Only interested in input from the meter mode source. */ | |
281 | return; | |
282 | ||
283 | devc = sdi->priv; | |
284 | ||
285 | /* Measurement type 11 == absolute, 19 = relative */ | |
286 | meas_type = strtol(tokens[0], NULL, 10); | |
287 | if (meas_type != 11 && meas_type != 19) | |
288 | /* Device is in some mode we don't support. */ | |
289 | return; | |
290 | ||
291 | /* We might get metadata for absolute and relative mode (if the device | |
292 | * is in relative mode). In that case, relative takes precedence. */ | |
293 | if (meas_type == 11 && devc->meas_type == 19) | |
294 | return; | |
295 | ||
296 | meas_unit = strtol(tokens[3], NULL, 10); | |
297 | if (meas_unit == 0) | |
298 | /* Device is turned off. Really. */ | |
299 | return; | |
300 | meas_char = strtol(tokens[4], NULL, 10); | |
301 | ||
302 | devc->mq = devc->unit = -1; | |
303 | devc->mqflags = 0; | |
304 | switch (meas_unit) { | |
305 | case 1: | |
306 | devc->mq = SR_MQ_VOLTAGE; | |
307 | devc->unit = SR_UNIT_VOLT; | |
308 | if (meas_char == 1) | |
309 | devc->mqflags |= SR_MQFLAG_DC; | |
310 | else if (meas_char == 2) | |
311 | devc->mqflags |= SR_MQFLAG_AC; | |
312 | else if (meas_char == 3) | |
313 | devc->mqflags |= SR_MQFLAG_DC | SR_MQFLAG_AC; | |
314 | else if (meas_char == 15) | |
315 | devc->mqflags |= SR_MQFLAG_DIODE; | |
316 | break; | |
317 | case 2: | |
318 | devc->mq = SR_MQ_CURRENT; | |
319 | devc->unit = SR_UNIT_AMPERE; | |
320 | if (meas_char == 1) | |
321 | devc->mqflags |= SR_MQFLAG_DC; | |
322 | else if (meas_char == 2) | |
323 | devc->mqflags |= SR_MQFLAG_AC; | |
324 | else if (meas_char == 3) | |
325 | devc->mqflags |= SR_MQFLAG_DC | SR_MQFLAG_AC; | |
326 | break; | |
327 | case 3: | |
328 | if (meas_char == 1) { | |
329 | devc->mq = SR_MQ_RESISTANCE; | |
330 | devc->unit = SR_UNIT_OHM; | |
331 | } else if (meas_char == 16) { | |
332 | devc->mq = SR_MQ_CONTINUITY; | |
333 | devc->unit = SR_UNIT_BOOLEAN; | |
334 | } | |
335 | break; | |
336 | case 12: | |
337 | devc->mq = SR_MQ_TEMPERATURE; | |
338 | devc->unit = SR_UNIT_CELSIUS; | |
339 | break; | |
340 | case 13: | |
341 | devc->mq = SR_MQ_TEMPERATURE; | |
342 | devc->unit = SR_UNIT_FAHRENHEIT; | |
343 | break; | |
344 | default: | |
345 | sr_dbg("unknown unit: %d", meas_unit); | |
346 | } | |
347 | if (devc->mq == -1 && devc->unit == -1) | |
348 | return; | |
349 | ||
350 | /* If we got here, we know how to interpret the measurement. */ | |
351 | devc->meas_type = meas_type; | |
352 | if (meas_type == 11) | |
353 | /* Absolute meter reading. */ | |
354 | devc->is_relative = FALSE; | |
355 | else if (!strcmp(tokens[0], "19")) | |
356 | /* Relative meter reading. */ | |
357 | devc->is_relative = TRUE; | |
358 | ||
359 | } | |
360 | ||
361 | static void handle_qm_19x_data(const struct sr_dev_inst *sdi, char **tokens) | |
362 | { | |
363 | struct dev_context *devc; | |
364 | struct sr_datafeed_packet packet; | |
365 | struct sr_datafeed_analog_old analog; | |
366 | float fvalue; | |
367 | ||
368 | if (!strcmp(tokens[0], "9.9E+37")) { | |
369 | /* An invalid measurement shows up on the display as "OL", but | |
370 | * comes through like this. Since comparing 38-digit floats | |
371 | * is rather problematic, we'll cut through this here. */ | |
372 | fvalue = NAN; | |
373 | } else { | |
374 | if (sr_atof_ascii(tokens[0], &fvalue) != SR_OK || fvalue == 0.0) { | |
375 | sr_err("Invalid float '%s'.", tokens[0]); | |
376 | return; | |
377 | } | |
378 | } | |
379 | ||
380 | devc = sdi->priv; | |
381 | if (devc->mq == -1 || devc->unit == -1) | |
382 | /* Don't have valid metadata yet. */ | |
383 | return; | |
384 | ||
385 | if (devc->mq == SR_MQ_RESISTANCE && isnan(fvalue)) | |
386 | fvalue = INFINITY; | |
387 | else if (devc->mq == SR_MQ_CONTINUITY) { | |
388 | if (isnan(fvalue)) | |
389 | fvalue = 0.0; | |
390 | else | |
391 | fvalue = 1.0; | |
392 | } | |
393 | ||
394 | analog.channels = sdi->channels; | |
395 | analog.num_samples = 1; | |
396 | analog.data = &fvalue; | |
397 | analog.mq = devc->mq; | |
398 | analog.unit = devc->unit; | |
399 | analog.mqflags = 0; | |
400 | packet.type = SR_DF_ANALOG_OLD; | |
401 | packet.payload = &analog; | |
402 | sr_session_send(sdi, &packet); | |
403 | devc->num_samples++; | |
404 | ||
405 | } | |
406 | ||
407 | static void handle_line(const struct sr_dev_inst *sdi) | |
408 | { | |
409 | struct dev_context *devc; | |
410 | struct sr_serial_dev_inst *serial; | |
411 | struct sr_datafeed_packet packet; | |
412 | struct sr_datafeed_analog_old *analog; | |
413 | int num_tokens, n, i; | |
414 | char cmd[16], **tokens; | |
415 | ||
416 | devc = sdi->priv; | |
417 | serial = sdi->conn; | |
418 | sr_spew("Received line '%s' (%d).", devc->buf, devc->buflen); | |
419 | ||
420 | if (devc->buflen == 1) { | |
421 | if (devc->buf[0] != '0') { | |
422 | /* Not just a CMD_ACK from the query command. */ | |
423 | sr_dbg("Got CMD_ACK '%c'.", devc->buf[0]); | |
424 | devc->expect_response = FALSE; | |
425 | } | |
426 | devc->buflen = 0; | |
427 | return; | |
428 | } | |
429 | ||
430 | analog = NULL; | |
431 | tokens = g_strsplit(devc->buf, ",", 0); | |
432 | if (tokens[0]) { | |
433 | if (devc->profile->model == FLUKE_187 || devc->profile->model == FLUKE_189) { | |
434 | devc->expect_response = FALSE; | |
435 | analog = handle_qm_18x(sdi, tokens); | |
436 | } else if (devc->profile->model == FLUKE_287 || devc->profile->model == FLUKE_289) { | |
437 | devc->expect_response = FALSE; | |
438 | analog = handle_qm_28x(sdi, tokens); | |
439 | } else if (devc->profile->model == FLUKE_190) { | |
440 | devc->expect_response = FALSE; | |
441 | for (num_tokens = 0; tokens[num_tokens]; num_tokens++); | |
442 | if (num_tokens >= 7) { | |
443 | /* Response to QM: this is a comma-separated list of | |
444 | * fields with metadata about the measurement. This | |
445 | * format can return multiple sets of metadata, | |
446 | * split into sets of 7 tokens each. */ | |
447 | devc->meas_type = 0; | |
448 | for (i = 0; i < num_tokens; i += 7) | |
449 | handle_qm_19x_meta(sdi, tokens + i); | |
450 | if (devc->meas_type) { | |
451 | /* Slip the request in now, before the main | |
452 | * timer loop asks for metadata again. */ | |
453 | n = sprintf(cmd, "QM %d\r", devc->meas_type); | |
454 | if (serial_write_blocking(serial, cmd, n, SERIAL_WRITE_TIMEOUT_MS) < 0) | |
455 | sr_err("Unable to send QM (measurement)."); | |
456 | } | |
457 | } else { | |
458 | /* Response to QM <n> measurement request. */ | |
459 | handle_qm_19x_data(sdi, tokens); | |
460 | } | |
461 | } | |
462 | } | |
463 | g_strfreev(tokens); | |
464 | devc->buflen = 0; | |
465 | ||
466 | if (analog) { | |
467 | /* Got a measurement. */ | |
468 | packet.type = SR_DF_ANALOG_OLD; | |
469 | packet.payload = analog; | |
470 | sr_session_send(sdi, &packet); | |
471 | devc->num_samples++; | |
472 | g_free(analog->data); | |
473 | g_free(analog); | |
474 | } | |
475 | ||
476 | } | |
477 | ||
478 | SR_PRIV int fluke_receive_data(int fd, int revents, void *cb_data) | |
479 | { | |
480 | struct sr_dev_inst *sdi; | |
481 | struct dev_context *devc; | |
482 | struct sr_serial_dev_inst *serial; | |
483 | int len; | |
484 | int64_t now, elapsed; | |
485 | ||
486 | (void)fd; | |
487 | ||
488 | if (!(sdi = cb_data)) | |
489 | return TRUE; | |
490 | ||
491 | if (!(devc = sdi->priv)) | |
492 | return TRUE; | |
493 | ||
494 | serial = sdi->conn; | |
495 | if (revents == G_IO_IN) { | |
496 | /* Serial data arrived. */ | |
497 | while (FLUKEDMM_BUFSIZE - devc->buflen - 1 > 0) { | |
498 | len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1); | |
499 | if (len < 1) | |
500 | break; | |
501 | devc->buflen++; | |
502 | *(devc->buf + devc->buflen) = '\0'; | |
503 | if (*(devc->buf + devc->buflen - 1) == '\r') { | |
504 | *(devc->buf + --devc->buflen) = '\0'; | |
505 | handle_line(sdi); | |
506 | break; | |
507 | } | |
508 | } | |
509 | } | |
510 | ||
511 | if (devc->limit_samples && devc->num_samples >= devc->limit_samples) { | |
512 | sdi->driver->dev_acquisition_stop(sdi); | |
513 | return TRUE; | |
514 | } | |
515 | ||
516 | now = g_get_monotonic_time() / 1000; | |
517 | elapsed = now - devc->cmd_sent_at; | |
518 | /* Send query command at poll_period interval, or after 1 second | |
519 | * has elapsed. This will make it easier to recover from any | |
520 | * out-of-sync or temporary disconnect issues. */ | |
521 | if ((devc->expect_response == FALSE && elapsed > devc->profile->poll_period) | |
522 | || elapsed > devc->profile->timeout) { | |
523 | if (serial_write_blocking(serial, "QM\r", 3, SERIAL_WRITE_TIMEOUT_MS) < 0) | |
524 | sr_err("Unable to send QM."); | |
525 | devc->cmd_sent_at = now; | |
526 | devc->expect_response = TRUE; | |
527 | } | |
528 | ||
529 | return TRUE; | |
530 | } |