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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 <glib.h>
21 #include "libsigrok.h"
22 #include "libsigrok-internal.h"
23 #include "agilent-dmm.h"
24 #include <stdlib.h>
25 #include <string.h>
26 #include <errno.h>
27 #include <math.h>
28
29 static void dispatch(const struct sr_dev_inst *sdi)
30 {
31         struct dev_context *devc;
32         const struct agdmm_job *jobs;
33         int64_t now;
34         int i;
35
36         devc = sdi->priv;
37         jobs = devc->profile->jobs;
38         now = g_get_monotonic_time() / 1000;
39         for (i = 0; (&jobs[i])->interval; i++) {
40                 if (now - devc->jobqueue[i] > (&jobs[i])->interval) {
41                         sr_spew("Running job %d.", i);
42                         (&jobs[i])->send(sdi);
43                         devc->jobqueue[i] = now;
44                 }
45         }
46 }
47
48 static void receive_line(const struct sr_dev_inst *sdi)
49 {
50         struct dev_context *devc;
51         const struct agdmm_recv *recvs, *recv;
52         GRegex *reg;
53         GMatchInfo *match;
54         int i;
55
56         devc = sdi->priv;
57
58         /* Strip CRLF */
59         while (devc->buflen) {
60                 if (*(devc->buf + devc->buflen - 1) == '\r'
61                                 || *(devc->buf + devc->buflen - 1) == '\n')
62                         *(devc->buf + --devc->buflen) = '\0';
63                 else
64                         break;
65         }
66         sr_spew("Received '%s'.", devc->buf);
67
68         recv = NULL;
69         recvs = devc->profile->recvs;
70         for (i = 0; (&recvs[i])->recv_regex; i++) {
71                 reg = g_regex_new((&recvs[i])->recv_regex, 0, 0, NULL);
72                 if (g_regex_match(reg, (char *)devc->buf, 0, &match)) {
73                         recv = &recvs[i];
74                         break;
75                 }
76                 g_match_info_unref(match);
77                 g_regex_unref(reg);
78         }
79         if (recv) {
80                 recv->recv(sdi, match);
81                 g_match_info_unref(match);
82                 g_regex_unref(reg);
83         } else
84                 sr_dbg("Unknown line '%s'.", devc->buf);
85
86         /* Done with this. */
87         devc->buflen = 0;
88 }
89
90 SR_PRIV int agdmm_receive_data(int fd, int revents, void *cb_data)
91 {
92         struct sr_dev_inst *sdi;
93         struct dev_context *devc;
94         struct sr_serial_dev_inst *serial;
95         int len;
96
97         (void)fd;
98
99         if (!(sdi = cb_data))
100                 return TRUE;
101
102         if (!(devc = sdi->priv))
103                 return TRUE;
104
105         serial = sdi->conn;
106         if (revents == G_IO_IN) {
107                 /* Serial data arrived. */
108                 while(AGDMM_BUFSIZE - devc->buflen - 1 > 0) {
109                         len = serial_read(serial, devc->buf + devc->buflen, 1);
110                         if (len < 1)
111                                 break;
112                         devc->buflen += len;
113                         *(devc->buf + devc->buflen) = '\0';
114                         if (*(devc->buf + devc->buflen - 1) == '\n') {
115                                 /* End of line */
116                                 receive_line(sdi);
117                                 break;
118                         }
119                 }
120         }
121
122         dispatch(sdi);
123
124         if (devc->limit_samples && devc->num_samples >= devc->limit_samples)
125                 sdi->driver->dev_acquisition_stop(sdi, cb_data);
126
127         return TRUE;
128 }
129
130 static int agdmm_send(const struct sr_dev_inst *sdi, const char *cmd)
131 {
132         struct sr_serial_dev_inst *serial;
133         char buf[32];
134
135         serial = sdi->conn;
136
137         sr_spew("Sending '%s'.", cmd);
138         strncpy(buf, cmd, 28);
139         if (!strncmp(buf, "*IDN?", 5))
140                 strncat(buf, "\r\n", 32);
141         else
142                 strncat(buf, "\n\r\n", 32);
143         if (serial_write(serial, buf, strlen(buf)) == -1) {
144                 sr_err("Failed to send: %s.", strerror(errno));
145                 return SR_ERR;
146         }
147
148         return SR_OK;
149 }
150
151 static int send_stat(const struct sr_dev_inst *sdi)
152 {
153         return agdmm_send(sdi, "STAT?");
154 }
155
156 static int recv_stat_u123x(const struct sr_dev_inst *sdi, GMatchInfo *match)
157 {
158         struct dev_context *devc;
159         char *s;
160
161         devc = sdi->priv;
162         s = g_match_info_fetch(match, 1);
163         sr_spew("STAT response '%s'.", s);
164
165         /* Max, Min or Avg mode -- no way to tell which, so we'll
166          * set both flags to denote it's not a normal measurement. */
167         if (s[0] == '1')
168                 devc->cur_mqflags |= SR_MQFLAG_MAX | SR_MQFLAG_MIN;
169         else
170                 devc->cur_mqflags &= ~(SR_MQFLAG_MAX | SR_MQFLAG_MIN);
171
172         if (s[1] == '1')
173                 devc->cur_mqflags |= SR_MQFLAG_RELATIVE;
174         else
175                 devc->cur_mqflags &= ~SR_MQFLAG_RELATIVE;
176
177         /* Triggered or auto hold modes. */
178         if (s[2] == '1' || s[3] == '1')
179                 devc->cur_mqflags |= SR_MQFLAG_HOLD;
180         else
181                 devc->cur_mqflags &= ~SR_MQFLAG_HOLD;
182
183         /* Temp/aux mode. */
184         if (s[7] == '1')
185                 devc->mode_tempaux = TRUE;
186         else
187                 devc->mode_tempaux = FALSE;
188
189         /* Continuity mode. */
190         if (s[16] == '1')
191                 devc->mode_continuity = TRUE;
192         else
193                 devc->mode_continuity = FALSE;
194
195         g_free(s);
196
197         return SR_OK;
198 }
199
200 static int recv_stat_u125x(const struct sr_dev_inst *sdi, GMatchInfo *match)
201 {
202         struct dev_context *devc;
203         char *s;
204
205         devc = sdi->priv;
206         s = g_match_info_fetch(match, 1);
207         sr_spew("STAT response '%s'.", s);
208
209         /* Peak hold mode. */
210         if (s[4] == '1')
211                 devc->cur_mqflags |= SR_MQFLAG_MAX;
212         else
213                 devc->cur_mqflags &= ~SR_MQFLAG_MAX;
214
215         /* Triggered hold mode. */
216         if (s[7] == '1')
217                 devc->cur_mqflags |= SR_MQFLAG_HOLD;
218         else
219                 devc->cur_mqflags &= ~SR_MQFLAG_HOLD;
220
221         g_free(s);
222
223         return SR_OK;
224 }
225
226 static int send_fetc(const struct sr_dev_inst *sdi)
227 {
228         return agdmm_send(sdi, "FETC?");
229 }
230
231 static int recv_fetc(const struct sr_dev_inst *sdi, GMatchInfo *match)
232 {
233         struct dev_context *devc;
234         struct sr_datafeed_packet packet;
235         struct sr_datafeed_analog analog;
236         float fvalue;
237         char *mstr;
238
239         sr_spew("FETC reply '%s'.", g_match_info_get_string(match));
240         devc = sdi->priv;
241
242         if (devc->cur_mq == -1)
243                 /* Haven't seen configuration yet, so can't know what
244                  * the fetched float means. Not really an error, we'll
245                  * get metadata soon enough. */
246                 return SR_OK;
247
248         if (!strcmp(g_match_info_get_string(match), "+9.90000000E+37")) {
249                 /* An invalid measurement shows up on the display as "O.L", but
250                  * comes through like this. Since comparing 38-digit floats
251                  * is rather problematic, we'll cut through this here. */
252                 fvalue = NAN;
253         } else {
254                 mstr = g_match_info_fetch(match, 1);
255                 if (sr_atof_ascii(mstr, &fvalue) != SR_OK || fvalue == 0.0) {
256                         g_free(mstr);
257                         sr_err("Invalid float.");
258                         return SR_ERR;
259                 }
260                 g_free(mstr);
261                 if (devc->cur_divider > 0)
262                         fvalue /= devc->cur_divider;
263         }
264
265         memset(&analog, 0, sizeof(struct sr_datafeed_analog));
266         analog.mq = devc->cur_mq;
267         analog.unit = devc->cur_unit;
268         analog.mqflags = devc->cur_mqflags;
269         analog.channels = sdi->channels;
270         analog.num_samples = 1;
271         analog.data = &fvalue;
272         packet.type = SR_DF_ANALOG;
273         packet.payload = &analog;
274         sr_session_send(devc->cb_data, &packet);
275
276         devc->num_samples++;
277
278         return SR_OK;
279 }
280
281 static int send_conf(const struct sr_dev_inst *sdi)
282 {
283         return agdmm_send(sdi, "CONF?");
284 }
285
286 static int recv_conf_u123x(const struct sr_dev_inst *sdi, GMatchInfo *match)
287 {
288         struct dev_context *devc;
289         char *mstr;
290
291         sr_spew("CONF? response '%s'.", g_match_info_get_string(match));
292         devc = sdi->priv;
293         mstr = g_match_info_fetch(match, 1);
294         if (!strcmp(mstr, "V")) {
295                 devc->cur_mq = SR_MQ_VOLTAGE;
296                 devc->cur_unit = SR_UNIT_VOLT;
297                 devc->cur_mqflags = 0;
298                 devc->cur_divider = 0;
299         } else if(!strcmp(mstr, "MV")) {
300                 if (devc->mode_tempaux) {
301                         devc->cur_mq = SR_MQ_TEMPERATURE;
302                         /* No way to detect whether Fahrenheit or Celcius
303                          * is used, so we'll just default to Celcius. */
304                         devc->cur_unit = SR_UNIT_CELSIUS;
305                 devc->cur_mqflags = 0;
306                 devc->cur_divider = 0;
307                 } else {
308                         devc->cur_mq = SR_MQ_VOLTAGE;
309                         devc->cur_unit = SR_UNIT_VOLT;
310                         devc->cur_mqflags = 0;
311                         devc->cur_divider = 1000;
312                 }
313         } else if(!strcmp(mstr, "A")) {
314                 devc->cur_mq = SR_MQ_CURRENT;
315                 devc->cur_unit = SR_UNIT_AMPERE;
316                 devc->cur_mqflags = 0;
317                 devc->cur_divider = 0;
318         } else if(!strcmp(mstr, "UA")) {
319                 devc->cur_mq = SR_MQ_CURRENT;
320                 devc->cur_unit = SR_UNIT_AMPERE;
321                 devc->cur_mqflags = 0;
322                 devc->cur_divider = 1000000;
323         } else if(!strcmp(mstr, "FREQ")) {
324                 devc->cur_mq = SR_MQ_FREQUENCY;
325                 devc->cur_unit = SR_UNIT_HERTZ;
326                 devc->cur_mqflags = 0;
327                 devc->cur_divider = 0;
328         } else if(!strcmp(mstr, "RES")) {
329                 if (devc->mode_continuity) {
330                         devc->cur_mq = SR_MQ_CONTINUITY;
331                         devc->cur_unit = SR_UNIT_BOOLEAN;
332                 } else {
333                         devc->cur_mq = SR_MQ_RESISTANCE;
334                         devc->cur_unit = SR_UNIT_OHM;
335                 }
336                 devc->cur_mqflags = 0;
337                 devc->cur_divider = 0;
338         } else if(!strcmp(mstr, "CAP")) {
339                 devc->cur_mq = SR_MQ_CAPACITANCE;
340                 devc->cur_unit = SR_UNIT_FARAD;
341                 devc->cur_mqflags = 0;
342                 devc->cur_divider = 0;
343         } else
344                 sr_dbg("Unknown first argument.");
345         g_free(mstr);
346
347         if (g_match_info_get_match_count(match) == 4) {
348                 mstr = g_match_info_fetch(match, 3);
349                 /* Third value, if present, is always AC or DC. */
350                 if (!strcmp(mstr, "AC"))
351                         devc->cur_mqflags |= SR_MQFLAG_AC;
352                 else if (!strcmp(mstr, "DC"))
353                         devc->cur_mqflags |= SR_MQFLAG_DC;
354                 else
355                         sr_dbg("Unknown third argument.");
356                 g_free(mstr);
357         } else
358                 devc->cur_mqflags &= ~(SR_MQFLAG_AC | SR_MQFLAG_DC);
359
360         return SR_OK;
361 }
362
363 static int recv_conf_u125x(const struct sr_dev_inst *sdi, GMatchInfo *match)
364 {
365         struct dev_context *devc;
366         char *mstr;
367
368         sr_spew("CONF? response '%s'.", g_match_info_get_string(match));
369         devc = sdi->priv;
370         mstr = g_match_info_fetch(match, 1);
371         if (!strncmp(mstr, "VOLT", 4)) {
372                 devc->cur_mq = SR_MQ_VOLTAGE;
373                 devc->cur_unit = SR_UNIT_VOLT;
374                 devc->cur_mqflags = 0;
375                 devc->cur_divider = 0;
376                 if (mstr[4] == ':') {
377                         if (!strcmp(mstr + 4, "AC"))
378                                 devc->cur_mqflags |= SR_MQFLAG_AC;
379                         else if (!strcmp(mstr + 4, "DC"))
380                                 devc->cur_mqflags |= SR_MQFLAG_DC;
381                         else
382                                 /* "ACDC" appears as well, no idea what it means. */
383                                 devc->cur_mqflags &= ~(SR_MQFLAG_AC | SR_MQFLAG_DC);
384                 } else
385                         devc->cur_mqflags &= ~(SR_MQFLAG_AC | SR_MQFLAG_DC);
386         } else if(!strcmp(mstr, "CURR")) {
387                 devc->cur_mq = SR_MQ_CURRENT;
388                 devc->cur_unit = SR_UNIT_AMPERE;
389                 devc->cur_mqflags = 0;
390                 devc->cur_divider = 0;
391         } else if(!strcmp(mstr, "RES")) {
392                 if (devc->mode_continuity) {
393                         devc->cur_mq = SR_MQ_CONTINUITY;
394                         devc->cur_unit = SR_UNIT_BOOLEAN;
395                 } else {
396                         devc->cur_mq = SR_MQ_RESISTANCE;
397                         devc->cur_unit = SR_UNIT_OHM;
398                 }
399                 devc->cur_mqflags = 0;
400                 devc->cur_divider = 0;
401         } else
402                 sr_dbg("Unknown first argument.");
403         g_free(mstr);
404
405         return SR_OK;
406 }
407
408 /* At least the 123x and 125x appear to have this. */
409 static int recv_conf(const struct sr_dev_inst *sdi, GMatchInfo *match)
410 {
411         struct dev_context *devc;
412         char *mstr;
413
414         sr_spew("CONF? response '%s'.", g_match_info_get_string(match));
415         devc = sdi->priv;
416         mstr = g_match_info_fetch(match, 1);
417         if(!strcmp(mstr, "DIOD")) {
418                 devc->cur_mq = SR_MQ_VOLTAGE;
419                 devc->cur_unit = SR_UNIT_VOLT;
420                 devc->cur_mqflags = SR_MQFLAG_DIODE;
421                 devc->cur_divider = 0;
422         } else
423                 sr_dbg("Unknown single argument.");
424         g_free(mstr);
425
426         return SR_OK;
427 }
428
429 /* This comes in whenever the rotary switch is changed to a new position.
430  * We could use it to determine the major measurement mode, but we already
431  * have the output of CONF? for that, which is more detailed. However
432  * we do need to catch this here, or it'll show up in some other output. */
433 static int recv_switch(const struct sr_dev_inst *sdi, GMatchInfo *match)
434 {
435         (void)sdi;
436
437         sr_spew("Switch '%s'.", g_match_info_get_string(match));
438
439         return SR_OK;
440 }
441
442 SR_PRIV const struct agdmm_job agdmm_jobs_u123x[] = {
443         { 143, send_stat },
444         { 1000, send_conf },
445         { 143, send_fetc },
446         { 0, NULL }
447 };
448
449 SR_PRIV const struct agdmm_recv agdmm_recvs_u123x[] = {
450         { "^\"(\\d\\d.{18}\\d)\"$", recv_stat_u123x },
451         { "^\\*([0-9])$", recv_switch },
452         { "^([-+][0-9]\\.[0-9]{8}E[-+][0-9]{2})$", recv_fetc },
453         { "^\"(V|MV|A|UA|FREQ),(\\d),(AC|DC)\"$", recv_conf_u123x },
454         { "^\"(RES|CAP),(\\d)\"$", recv_conf_u123x},
455         { "^\"(DIOD)\"$", recv_conf },
456         { NULL, NULL }
457 };
458
459 SR_PRIV const struct agdmm_job agdmm_jobs_u125x[] = {
460         { 143, send_stat },
461         { 1000, send_conf },
462         { 143, send_fetc },
463         { 0, NULL }
464 };
465
466 SR_PRIV const struct agdmm_recv agdmm_recvs_u125x[] = {
467         { "^\"(\\d\\d.{18}\\d)\"$", recv_stat_u125x },
468         { "^\\*([0-9])$", recv_switch },
469         { "^([-+][0-9]\\.[0-9]{8}E[-+][0-9]{2})$", recv_fetc },
470         { "^(VOLT|CURR|RES|CAP) ([-+][0-9\\.E\\-+]+),([-+][0-9\\.E\\-+]+)$", recv_conf_u125x },
471         { "^(VOLT:[ACD]+) ([-+][0-9\\.E\\-+]+),([-+][0-9\\.E\\-+]+)$", recv_conf_u125x },
472         { "^\"(DIOD)\"$", recv_conf },
473         { NULL, NULL }
474 };