2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013, 2014 Matthias Heidbrink <m-sigrok@heidbrink.biz>
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.
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.
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/>.
23 * Gossen Metrawatt Metrahit 1x/2x drivers
33 /* Internal Headers */
34 static guchar calc_chksum_14(guchar *dta);
35 static int chk_msg14(struct sr_dev_inst *sdi);
37 /** Set or clear flags in devc->mqflags. */
38 static void setmqf(struct dev_context *devc, uint64_t flags, gboolean set)
41 devc->mqflags |= flags;
43 devc->mqflags &= ~flags;
46 /** Decode current type and measured value, Metrahit 12-16. */
47 static void decode_ctmv_16(uint8_t ctmv, struct dev_context *devc)
54 case 0x00: /* 0000 - */
56 case 0x01: /* 0001 mV DC */
57 devc->scale1000 = -1; /* Fall through */
58 case 0x02: /* 0010 V DC */
59 case 0x03: /* 0011 V AC+DC */
60 case 0x04: /* 0100 V AC */
61 devc->mq = SR_MQ_VOLTAGE;
62 devc->unit = SR_UNIT_VOLT;
64 devc->mqflags |= SR_MQFLAG_DC;
66 devc->mqflags |= SR_MQFLAG_AC;
67 if (devc->model >= METRAHIT_16S)
68 devc->mqflags |= SR_MQFLAG_RMS;
71 case 0x05: /* 0101 Hz (15S/16S only) */
72 case 0x06: /* 0110 kHz (15S/16S only) */
73 devc->mq = SR_MQ_FREQUENCY;
74 devc->unit = SR_UNIT_HERTZ;
78 case 0x07: /* 0111 % (15S/16S only) */
79 devc->mq = SR_MQ_DUTY_CYCLE;
80 devc->unit = SR_UNIT_PERCENTAGE;
82 case 0x08: /* 1000 Diode */
83 devc->mq = SR_MQ_VOLTAGE;
84 devc->unit = SR_UNIT_VOLT;
85 devc->mqflags |= SR_MQFLAG_DIODE;
87 case 0x09: /* 1001 Ohm, °C */
88 case 0x0a: /* 1010 kOhm */
89 case 0x0b: /* 1011 MOhm */
90 devc->mq = SR_MQ_RESISTANCE; /* Changed to temp. later if req.*/
91 devc->unit = SR_UNIT_OHM;
92 devc->scale1000 = ctmv - 0x09;
94 case 0x0c: /* 1100 nF (15S/16S only) */
95 case 0x0d: /* 1101 µF (15S/16S only) */
96 devc->mq = SR_MQ_CAPACITANCE;
97 devc->unit = SR_UNIT_FARAD;
101 devc->scale1000 = -2;
103 case 0x0e: /* mA, µA */
104 devc->scale1000 = -1; /* Fall through. */
106 devc->mq = SR_MQ_CURRENT;
107 devc->unit = SR_UNIT_AMPERE;
108 if (devc->model == METRAHIT_16S)
109 devc->mqflags |= SR_MQFLAG_RMS;
110 /* 16I A only with clamp, RMS questionable. */
116 * Decode range/sign/acdc byte special chars (Metrahit 12-16).
118 * @param[in] rs Range and sign byte.
120 static void decode_rs_16(uint8_t rs, struct dev_context *devc)
122 sr_spew("decode_rs_16(%d) scale = %d", rs, devc->scale);
124 if (rs & 0x04) /* Sign */
125 devc->scale = -devc->scale;
127 if (devc->mq == SR_MQ_CURRENT) {
128 if (rs & 0x08) /* Current is AC */
129 devc->mqflags |= SR_MQFLAG_AC;
131 devc->mqflags |= SR_MQFLAG_DC;
136 if (devc->mq == SR_MQ_VOLTAGE) /* V */
138 else if (devc->mq == SR_MQ_CURRENT) /* 000.0 µA */
140 else if (devc->mq == SR_MQ_RESISTANCE) {
141 if (devc->buflen >= 10) {
142 /* °C with 10 byte msg type, otherwise GOhm. */
143 devc->mq = SR_MQ_TEMPERATURE;
144 devc->unit = SR_UNIT_CELSIUS;
146 } else if (devc->scale1000 == 2) {
147 /* 16I Iso 500/1000V 3 GOhm */
165 * Decode special chars, Metrahit 12-16.
167 * @param[in] spc Special characters 1 and 2 (s1 | (s2 << 4)).
169 static void decode_spc_16(uint8_t spc, struct dev_context *devc)
172 /* TODO: What does that mean? Power on? The 16I sets this. */
174 /* xxxxxx1x Low battery */
177 setmqf(devc, SR_MQFLAG_MIN, spc & 0x80);
180 setmqf(devc, SR_MQFLAG_AUTORANGE, !(spc & 0x40));
183 setmqf(devc, SR_MQFLAG_HOLD, spc & 0x20);
186 setmqf(devc, SR_MQFLAG_MAX, spc & 0x10);
189 /** Decode current type and measured value, Metrahit 18. */
190 static void decode_ctmv_18(uint8_t ctmv, struct dev_context *devc)
197 case 0x00: /* 0000 - */
199 case 0x01: /* 0001 V AC */
200 case 0x02: /* 0010 V AC+DC */
201 case 0x03: /* 0011 V DC */
202 devc->mq = SR_MQ_VOLTAGE;
203 devc->unit = SR_UNIT_VOLT;
205 devc->mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_RMS);
207 devc->mqflags |= SR_MQFLAG_DC;
209 case 0x04: /* 0100 Ohm/Ohm with buzzer */
210 devc->mq = SR_MQ_RESISTANCE;
211 devc->unit = SR_UNIT_OHM;
213 case 0x05: /* 0101 Diode/Diode with buzzer */
214 devc->mq = SR_MQ_VOLTAGE;
215 devc->unit = SR_UNIT_VOLT;
216 devc->mqflags |= SR_MQFLAG_DIODE;
218 case 0x06: /* 0110 °C */
219 devc->mq = SR_MQ_TEMPERATURE;
220 devc->unit = SR_UNIT_CELSIUS;
222 case 0x07: /* 0111 F */
223 devc->mq = SR_MQ_CAPACITANCE;
224 devc->unit = SR_UNIT_FARAD;
226 case 0x08: /* 1000 mA DC */
227 case 0x09: /* 1001 A DC */
228 case 0x0a: /* 1010 mA AC+DC */
229 case 0x0b: /* 1011 A AC+DC */
230 devc->mq = SR_MQ_CURRENT;
231 devc->unit = SR_UNIT_AMPERE;
232 devc->mqflags |= SR_MQFLAG_DC;
234 devc->mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_RMS);
235 if ((ctmv == 0x08) || (ctmv == 0x0a))
236 devc->scale1000 = -1;
238 case 0x0c: /* 1100 Hz */
239 devc->mq = SR_MQ_FREQUENCY;
240 devc->unit = SR_UNIT_HERTZ;
242 case 0x0d: /* 1101 dB */
243 devc->mq = SR_MQ_VOLTAGE;
244 devc->unit = SR_UNIT_DECIBEL_VOLT;
245 devc->mqflags |= SR_MQFLAG_AC; /* dB available for AC only */
247 case 0x0e: /* 1110 Events AC, Events AC+DC. Actually delivers just
248 * current voltage via IR, nothing more. */
249 devc->mq = SR_MQ_VOLTAGE;
250 devc->unit = SR_UNIT_VOLT;
251 devc->mqflags |= SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS;
253 case 0x0f: /* 1111 Clock */
254 devc->mq = SR_MQ_TIME;
255 devc->unit = SR_UNIT_SECOND;
256 devc->mqflags |= SR_MQFLAG_DURATION;
262 * Decode range/sign/acdc byte special chars, Metrahit 18.
264 * @param[in] rs Range/sign byte.
266 static void decode_rs_18(uint8_t rs, struct dev_context *devc)
271 if (((devc->scale > 0) && (rs & 0x08)) ||
272 ((devc->scale < 0) && !(rs & 0x08)))
273 devc->scale = -devc->scale;
279 if (devc->unit == SR_UNIT_DECIBEL_VOLT) {
282 * When entering relative mode, the device switches
283 * from 10 byte to 6 byte msg format. Unfortunately
284 * it switches back to 10 byte when the second value
285 * is measured, so that's not sufficient to
286 * identify relative mode.
290 devc->scale += range - 5;
293 if (devc->scale1000 == -1)
294 devc->scale += range - 5;
296 devc->scale += range - 4;
298 case SR_MQ_RESISTANCE:
299 devc->scale += range - 2;
301 case SR_MQ_FREQUENCY:
302 devc->scale += range - 2;
304 case SR_MQ_TEMPERATURE:
305 devc->scale += range - 2;
307 case SR_MQ_CAPACITANCE:
308 devc->scale += range - 13;
310 /* TODO: 29S Mains measurements. */
312 /* Avoid certain compiler warnings due to (-Wswitch). */
318 * Decode special chars, Metrahit 18.
320 * @param[in] spc Special characters 1 and 2 (s1 | (s2 << 4)).
322 static void decode_spc_18(uint8_t spc, struct dev_context *devc)
326 /* xxxxxx1x Low battery */
329 if (devc->mq == SR_MQ_TIME) {
330 /* xxx1xxxx Clock running: 1; stop: 0 */
331 sr_spew("Clock running: %d", spc >> 4);
334 setmqf(devc, SR_MQFLAG_AUTORANGE, !(spc & 0x80));
337 setmqf(devc, SR_MQFLAG_MIN, spc & 0x40);
340 setmqf(devc, SR_MQFLAG_MAX, spc & 0x20);
343 setmqf(devc, SR_MQFLAG_HOLD, spc & 0x10);
348 * Decode current type and measured value, Metrahit 2x.
350 * @param[in] ctmv Current type and measured value (v1 | (v2 << 4)).
352 static void decode_ctmv_2x(uint8_t ctmv, struct dev_context *devc)
354 if ((ctmv > 0x20) || (!devc)) {
355 sr_err("decode_ctmv_2x(0x%x): invalid param(s)!", ctmv);
365 case 0x01: /* 00001 V DC */
366 case 0x02: /* 00010 V AC+DC */
367 case 0x03: /* 00011 V AC */
368 devc->mq = SR_MQ_VOLTAGE;
369 devc->unit = SR_UNIT_VOLT;
371 devc->mqflags |= SR_MQFLAG_DC;
373 devc->mqflags |= SR_MQFLAG_AC;
374 if (devc->model >= METRAHIT_24S)
375 devc->mqflags |= SR_MQFLAG_RMS;
378 case 0x04: /* 00100 mA DC */
379 case 0x05: /* 00101 mA AC+DC */
380 devc->scale1000 = -1;
382 case 0x06: /* 00110 A DC */
383 case 0x07: /* 00111 A AC+DC */
384 devc->mq = SR_MQ_CURRENT;
385 devc->unit = SR_UNIT_AMPERE;
386 devc->mqflags |= SR_MQFLAG_DC;
387 if ((ctmv == 0x05) || (ctmv == 0x07)) {
388 devc->mqflags |= SR_MQFLAG_AC;
389 if (devc->model >= METRAHIT_24S)
390 devc->mqflags |= SR_MQFLAG_RMS;
393 case 0x08: /* 01000 Ohm */
394 devc->mq = SR_MQ_RESISTANCE;
395 devc->unit = SR_UNIT_OHM;
397 case 0x09: /* 01001 F */
398 devc->mq = SR_MQ_CAPACITANCE;
399 devc->unit = SR_UNIT_FARAD;
402 case 0x0a: /* 01010 V dB */
403 devc->mq = SR_MQ_VOLTAGE;
404 devc->unit = SR_UNIT_DECIBEL_VOLT;
405 devc->mqflags |= SR_MQFLAG_AC;
406 if (devc->model >= METRAHIT_24S)
407 devc->mqflags |= SR_MQFLAG_RMS;
409 case 0x0b: /* 01011 Hz U ACDC */
410 case 0x0c: /* 01100 Hz U AC */
411 devc->mq = SR_MQ_FREQUENCY;
412 devc->unit = SR_UNIT_HERTZ;
413 devc->mqflags |= SR_MQFLAG_AC;
415 devc->mqflags |= SR_MQFLAG_DC;
417 case 0x0d: /* 01101 W on power, mA range (29S only) */
420 case 0x0e: /* 01110 W on power, A range (29S only) */
422 devc->scale1000 = -1;
423 devc->mq = SR_MQ_POWER;
424 devc->unit = SR_UNIT_WATT;
425 devc->mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS);
427 case 0x0f: /* 01111 Diode */
428 case 0x10: /* 10000 Diode with buzzer (actually cont. with voltage) */
429 devc->unit = SR_UNIT_VOLT;
431 devc->mq = SR_MQ_VOLTAGE;
432 devc->mqflags |= SR_MQFLAG_DIODE;
434 devc->mq = SR_MQ_CONTINUITY;
437 devc->unit = SR_UNIT_VOLT;
439 case 0x11: /* 10001 Ohm with buzzer */
440 devc->mq = SR_MQ_CONTINUITY;
441 devc->unit = SR_UNIT_OHM;
442 devc->scale1000 = -1;
444 case 0x12: /* 10010 Temperature */
445 devc->mq = SR_MQ_TEMPERATURE;
446 devc->unit = SR_UNIT_CELSIUS;
447 /* This can be Fahrenheit. That is detected by range=4 later. */
449 /* 0x13 10011 unused */
450 /* 0x14 10100 unused */
451 case 0x15: /* 10101 Press (29S only) */
452 /* TODO: What does that mean? Possibly phase shift?
453 Then we need a unit/flag for it. */
454 devc->mq = SR_MQ_GAIN;
455 devc->unit = SR_UNIT_PERCENTAGE;
457 case 0x16: /* 10110 Pulse W (29S only) */
458 /* TODO: Own unit and flag for this! */
459 devc->mq = SR_MQ_POWER;
460 devc->unit = SR_UNIT_WATT;
462 case 0x17: /* 10111 TRMS V on mains (29S only) */
463 devc->mq = SR_MQ_VOLTAGE;
464 devc->unit = SR_UNIT_VOLT;
465 devc->mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS);
467 case 0x18: /* 11000 Counter (zero crossings of a signal) */
468 devc->mq = SR_MQ_VOLTAGE;
469 devc->unit = SR_UNIT_UNITLESS;
471 case 0x19: /* 11001 Events U ACDC */
472 case 0x1a: /* 11010 Events U AC */
473 /* TODO: No unit or flags for this yet! */
474 devc->mq = SR_MQ_VOLTAGE;
475 devc->unit = SR_UNIT_UNITLESS;
476 devc->mqflags |= SR_MQFLAG_AC;
478 devc->mqflags |= SR_MQFLAG_DC;
480 case 0x1b: /* 11011 Milliamperes in power mode (29S only); error in docs, "pulse on mains" */
481 devc->mq = SR_MQ_CURRENT;
482 devc->unit = SR_UNIT_AMPERE;
483 devc->mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS);
484 devc->scale1000 = -1;
486 case 0x1c: /* 11100 dropout on mains (29S only) */
487 /* TODO: No unit or flags for this yet! */
488 devc->mq = SR_MQ_VOLTAGE;
489 devc->unit = SR_UNIT_UNITLESS;
490 devc->mqflags |= SR_MQFLAG_AC;
492 case 0x1d: /* 11101 Voltage in power mode (29S); undocumented! */
493 devc->mq = SR_MQ_VOLTAGE;
494 devc->unit = SR_UNIT_VOLT;
495 devc->mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS);
497 /* 0x1e: 11110 Undocumented */
498 case 0x1f: /* 11111 25S in stopwatch mode; undocumented!
499 The value is voltage, not time, so treat it such. */
500 devc->mq = SR_MQ_VOLTAGE;
501 devc->unit = SR_UNIT_VOLT;
502 devc->mqflags |= SR_MQFLAG_DC;
504 case 0x20: /* 100000 25S in event count mode; undocumented!
505 Value is 0 anyway. */
506 devc->mq = SR_MQ_VOLTAGE;
507 devc->unit = SR_UNIT_UNITLESS;
510 sr_err("decode_ctmv_2x(%d, ...): Unknown ctmv!", ctmv);
516 * Decode range/sign/acdc byte special chars, Metrahit 2x, table TR.
518 * @param[in] rs Range/sign byte.
520 static void decode_rs_2x(uint8_t rs, struct dev_context *devc)
525 if (((devc->scale > 0) && (rs & 0x08)) ||
526 ((devc->scale < 0) && !(rs & 0x08)))
527 devc->scale = -devc->scale;
533 if (devc->unit == SR_UNIT_DECIBEL_VOLT)
536 devc->scale += range - 6;
539 if (devc->scale1000 != -1) /* uA, mA */
540 range += 1;/* mA and A ranges differ by 10^4, not 10^3!*/
541 devc->scale += range - 6;
543 case SR_MQ_RESISTANCE:
544 devc->scale += range - 3;
546 case SR_MQ_FREQUENCY:
547 devc->scale += range - 3;
549 case SR_MQ_TEMPERATURE:
550 if (range == 4) /* Indicator for °F */
551 devc->unit = SR_UNIT_FAHRENHEIT;
554 case SR_MQ_CAPACITANCE:
556 range -= 1; /* Same value as range 6 */
557 devc->scale += range - 13;
559 /* TODO: 29S Mains measurements. */
561 /* Avoid certain compiler warnings due to (-Wswitch). */
567 * Decode range/sign/acdc byte special chars, Metrahit 2x, table TR 2.
569 * @param[in] rs Range/sign byte.
571 static void decode_rs_2x_TR2(uint8_t rs, struct dev_context *devc)
579 if (devc->scale1000 == -1) /* mA */
582 case 1: /* 100, 300 µA */
586 case 3: /* 1, 3 mA */
590 case 5: /* 10, 30 mA */
594 case 7: /* 100, 300 mA */
610 decode_rs_2x(rs, devc);
615 if (((devc->scale > 0) && (rs & 0x08)) ||
616 ((devc->scale < 0) && !(rs & 0x08)))
617 devc->scale = -devc->scale;
621 * Decode special chars (Metrahit 2x).
623 * @param[in] spc Special characters 1 and 2 (s1 | (s2 << 4)).
625 static void decode_spc_2x(uint8_t spc, struct dev_context *devc)
629 /* xxxxxx1x Low battery */
636 setmqf(devc, SR_MQFLAG_HOLD, spc & 0x10);
638 /* x11xxxxx unused */
640 setmqf(devc, SR_MQFLAG_AUTORANGE, !(spc & 0x80));
643 /** Clean range and sign. */
644 static void clean_rs_v(struct dev_context *devc)
650 /** Clean current type, measured variable, range and sign. */
651 static void clean_ctmv_rs_v(struct dev_context *devc)
660 /** Send prepared value. */
661 static void send_value(struct sr_dev_inst *sdi)
663 struct dev_context *devc;
664 struct sr_datafeed_analog analog;
665 struct sr_analog_encoding encoding;
666 struct sr_analog_meaning meaning;
667 struct sr_analog_spec spec;
668 struct sr_datafeed_packet packet;
673 digits = -(devc->scale + 3 * devc->scale1000);
674 sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
675 analog.meaning->channels = sdi->channels;
676 analog.num_samples = 1;
677 analog.meaning->mq = devc->mq;
678 analog.meaning->unit = devc->unit;
679 analog.meaning->mqflags = devc->mqflags;
680 analog.data = &devc->value;
682 memset(&packet, 0, sizeof(struct sr_datafeed_packet));
683 packet.type = SR_DF_ANALOG;
684 packet.payload = &analog;
685 sr_session_send(sdi, &packet);
687 sr_sw_limits_update_samples_read(&devc->limits, 1);
690 /** Process 6-byte data message, Metrahit 1x/2x send mode. */
691 static void process_msg_dta_6(struct sr_dev_inst *sdi)
693 struct dev_context *devc;
700 /* Byte 0, range and sign */
701 if (devc->model <= METRAHIT_16X)
702 decode_rs_16(bc(devc->buf[0]), devc);
703 else if (devc->model < METRAHIT_2X)
704 decode_rs_18(bc(devc->buf[0]), devc);
706 decode_rs_2x(bc(devc->buf[0]), devc);
707 devc->scale += 1; /* Compensate for format having only 5 digits, decode_rs_2x() assumes 6. */
710 /* Bytes 1-5, digits (ls first). */
711 for (cnt = 0; cnt < 5; cnt++) {
712 dgt = bc(devc->buf[1 + cnt]);
714 /* 10 Overload; on model <= 16X also 11 possible. */
719 devc->value += pow(10.0, cnt) * dgt;
722 sr_spew("process_msg_dta_6() value=%f scale=%d scale1000=%d",
723 devc->value, devc->scale, devc->scale1000);
724 if (devc->value != NAN)
725 devc->value *= pow(10.0, devc->scale) * pow(1000.0, devc->scale1000);
727 /* Create and send packet. */
731 /** Process 5-byte info message, Metrahit 1x/2x. */
732 static void process_msg_inf_5(struct sr_dev_inst *sdi)
734 struct dev_context *devc;
739 clean_ctmv_rs_v(devc);
742 model = gmc_decode_model_sm(bc(devc->buf[0]));
743 if (model != devc->model) {
744 sr_warn("Model mismatch in data: Detected %s, now %s",
745 gmc_model_str(devc->model), gmc_model_str(model));
748 /* Process bytes 1-4 */
749 if (devc->model <= METRAHIT_16X) {
750 decode_ctmv_16(bc(devc->buf[1]), devc);
751 decode_spc_16(bc(devc->buf[2]) | (bc(devc->buf[3]) << 4), devc);
752 decode_rs_16(bc(devc->buf[4]), devc);
753 } else if (devc->model <= METRAHIT_18S) {
754 decode_ctmv_18(bc(devc->buf[1]), devc);
755 decode_spc_18(bc(devc->buf[2]) | (bc(devc->buf[3]) << 4), devc);
756 decode_rs_18(bc(devc->buf[4]), devc);
757 } else { /* Must be Metrahit 2x */
758 decode_ctmv_2x(bc(devc->buf[1]), devc);
759 decode_spc_2x(bc(devc->buf[2]) | (bc(devc->buf[3]) << 4), devc);
760 decode_rs_2x(bc(devc->buf[4]), devc);
764 /** Process 10-byte info/data message, Metrahit 15+. */
765 static void process_msg_inf_10(struct sr_dev_inst *sdi)
767 struct dev_context *devc;
773 process_msg_inf_5(sdi);
775 /* Now decode numbers */
776 for (cnt = 0; cnt < 5; cnt++) {
777 dgt = bc(devc->buf[5 + cnt]);
778 if (dgt == 11) { /* Empty digit */
781 else if (dgt >= 12) { /* Overload */
786 devc->value += pow(10.0, cnt) * dgt;
788 sr_spew("process_msg_inf_10() value=%f scale=%d scalet=%d",
789 devc->value, devc->scale, devc->scale1000);
791 if (devc->value != NAN)
792 devc->value *= pow(10, devc->scale) * pow(1000.0, devc->scale1000);
794 /* Create and send packet. */
798 /** Decode send interval (Metrahit 2x only). */
799 static const char *decode_send_interval(uint8_t si)
835 return "Unknown value";
839 /** Process 13-byte info/data message, Metrahit 2x. */
840 static void process_msg_inf_13(struct sr_dev_inst *sdi)
842 struct dev_context *devc;
849 clean_ctmv_rs_v(devc);
852 model = gmc_decode_model_sm(bc(devc->buf[0]));
853 if (model != devc->model) {
854 sr_warn("Model mismatch in data: Detected %s, now %s",
855 gmc_model_str(devc->model), gmc_model_str(model));
859 decode_ctmv_2x(bc(devc->buf[1]) | (bc(devc->buf[11]) << 4), devc);
860 decode_spc_2x(bc(devc->buf[2]) | (bc(devc->buf[3]) << 4), devc);
861 decode_rs_2x(bc(devc->buf[4]), devc);
863 /* Bytes 5-10, digits (ls first). */
864 for (cnt = 0; cnt < 6; cnt++) {
865 dgt = bc(devc->buf[5 + cnt]);
866 if (dgt == 10) { /* Overload */
871 devc->value += pow(10.0, cnt) * dgt;
873 sr_spew("process_msg_inf_13() value=%f scale=%d scale1000=%d mq=%d "
874 "unit=%d mqflags=0x%02" PRIx64, devc->value, devc->scale,
875 devc->scale1000, devc->mq, devc->unit, (uint64_t)devc->mqflags);
876 if (devc->value != NAN)
877 devc->value *= pow(10, devc->scale) * pow(1000.0, devc->scale1000);
879 /* Byte 12, Send Interval */
880 sr_spew("Send interval: %s", decode_send_interval(bc(devc->buf[12])));
882 /* Create and send packet. */
887 * Dump contents of 14-byte message.
889 * @param buf Pointer to array of 14 data bytes.
890 * @param[in] raw Write only data bytes, no interpretation.
892 static void dump_msg14(guchar *buf, gboolean raw)
898 sr_spew("msg14: 0x %02x %02x %02x %02x %02x %02x %02x %02x "
899 "%02x %02x %02x %02x %02x %02x",
900 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6],
901 buf[7], buf[8], buf[9], buf[10], buf[11], buf[12],
904 sr_spew("msg14: 0x a=%d c1=%02x c2=%02x cmd=%02x dta=%02x "
905 "%02x %02x %02x %02x %02x %02x %02x %02x chs=%02x",
906 buf[1] == 0x2b?buf[0] >> 2:buf[0] % 0x0f, buf[1], buf[2], buf[3], buf[4], buf[5],
907 buf[6], buf[7], buf[8], buf[9], buf[10], buf[11],
912 * Calc checksum for 14 byte message type.
914 * @param[in] dta Pointer to array of 13 data bytes.
917 static guchar calc_chksum_14(guchar *dta)
921 for (chs = 0, cnt = 0; cnt < (GMC_REPLY_SIZE - 1); cnt++)
924 return (64 - chs) & MASK_6BITS;
927 /** Check 14-byte message, Metrahit 2x. */
928 static int chk_msg14(struct sr_dev_inst *sdi)
930 struct dev_context *devc;
932 gboolean isreq; /* Message is request to multimeter (otherwise response) */
933 uint8_t addr; /* Adaptor address */
937 /* Check parameters and message */
938 if (!sdi || !(devc = sdi->priv))
941 if (devc->buflen != 14) {
942 sr_err("process_msg_14(): Msg len 14 expected!");
946 isreq = devc->buf[1] == 0x2b;
948 addr = devc->buf[0] >> 2;
950 addr = devc->buf[0] & 0x0f;
952 if ((devc->addr != addr) && !(isreq && (addr == 0))) {
953 sr_err("process_msg_14(): Address mismatch, msg for other device!");
957 if (devc->buf[1] == 0) { /* Error msg from device! */
958 switch (devc->buf[2]) {
959 case 1: /* Not used */
960 sr_err("Device: Illegal error code!");
962 case 2: /* Incorrect check sum of received block */
963 sr_err("Device: Incorrect checksum in cmd!");
965 case 3: /* Incorrect length of received block */
966 sr_err("Device: Incorrect block length in cmd!");
968 case 4: /* Incorrect 2nd or 3rd byte */
969 sr_err("Device: Incorrect byte 2 or 3 in cmd!");
971 case 5: /* Parameter out of range */
972 sr_err("Device: Parameter out of range!");
975 sr_err("Device: Unknown error code!");
979 else if (!isreq && ((devc->buf[1] != 0x27) || (devc->buf[2] != 0x3f))) {
980 sr_err("process_msg_14(): byte 1/2 unexpected!");
984 if (calc_chksum_14(devc->buf) != devc->buf[13]) {
985 sr_err("process_msg_14(): Invalid checksum!");
990 dump_msg14(devc->buf, TRUE);
995 /** Check 14-byte message, Metrahit 2x. */
996 SR_PRIV int process_msg14(struct sr_dev_inst *sdi)
998 struct dev_context *devc;
1003 if ((retc = chk_msg14(sdi)) != SR_OK)
1008 clean_ctmv_rs_v(devc);
1009 addr = devc->buf[0] & MASK_6BITS;
1010 if (addr != devc->addr)
1011 sr_info("Device address mismatch %d/%d!", addr, devc->addr);
1013 switch (devc->buf[3]) { /* That's the command this reply is for */
1014 /* 0 cannot occur, the respective message is not a 14-byte message */
1015 case 1: /* Read first free and occupied address */
1016 sr_spew("Cmd %d unimplemented!", devc->buf[3]);
1018 case 2: /* Clear all RAM in multimeter */
1019 sr_spew("Cmd %d unimplemented!", devc->buf[3]);
1021 case 3: /* Read firmware version and status */
1022 sr_spew("Cmd 3, Read firmware and status");
1023 switch (devc->cmd_idx) {
1025 devc->fw_ver_maj = devc->buf[5];
1026 devc->fw_ver_min = devc->buf[4];
1027 sr_spew("Firmware version %d.%d", (int)devc->fw_ver_maj, (int)devc->fw_ver_min);
1028 sr_spew("Rotary Switch Position (1..10): %d", (int)devc->buf[6]);
1029 /** Docs say values 0..9, but that's not true */
1030 sr_spew("Measurement Function: %d ", (int)devc->buf[7]);
1031 decode_ctmv_2x(devc->buf[7], devc);
1032 sr_spew("Range: 0x%x", devc->buf[8]);
1033 decode_rs_2x_TR2(devc->buf[8] & 0x0f, devc); /* Docs wrong, uses conversion table TR_2! */
1034 devc->autorng = (devc->buf[8] & 0x20) == 0;
1035 // TODO 9, 10: 29S special functions
1036 devc->ubatt = 0.1 * (float)devc->buf[11];
1037 devc->model = gmc_decode_model_bd(devc->buf[12]);
1038 sr_spew("Model=%s, battery voltage=%2.1f V", gmc_model_str(devc->model), (double)devc->ubatt);
1041 sr_spew("Internal version %d.%d", (int)devc->buf[5], (int)devc->buf[4]);
1042 sr_spew("Comm mode: 0x%x", (int)devc->buf[6]);
1043 sr_spew("Block cnt%%64: %d", (int)devc->buf[7]);
1044 sr_spew("drpCi: %d drpCh: %d", (int)devc->buf[8], (int)devc->buf[9]);
1045 // Semantics undocumented. Possibly Metrahit 29S dropouts stuff?
1048 sr_spew("Cmd 3: Unknown cmd_idx=%d", devc->cmd_idx);
1052 case 4: /* Set real time, date, sample rate, trigger, ... */
1053 sr_spew("Cmd %d unimplemented!", devc->buf[3]);
1055 case 5: /* Read real time, date, sample rate, trigger... */
1056 sr_spew("Cmd %d unimplemented!", devc->buf[3]);
1058 case 6: /* Set modes or power off */
1059 sr_spew("Cmd %d unimplemented!", devc->buf[3]);
1061 case 7: /* Set measurement function, range, autom/man. */
1062 sr_spew("Cmd %d unimplemented!", devc->buf[3]);
1064 case 8: /* Get one measurement value */
1065 sr_spew("Cmd 8, get one measurement value");
1066 sr_spew("Measurement Function: %d ", (int)devc->buf[5]);
1067 decode_ctmv_2x(devc->buf[5], devc);
1068 if (!(devc->buf[6] & 0x10)) /* If bit4=0, old data. */
1071 decode_rs_2x_TR2(devc->buf[6] & 0x0f, devc); // The docs say conversion table TR_3, but that does not work
1072 setmqf(devc, SR_MQFLAG_AUTORANGE, devc->autorng);
1074 for (cnt = 0; cnt < 6; cnt++) {
1075 dgt = bc(devc->buf[7 + cnt]);
1076 if (dgt == 10) { /* Overload */
1081 else if (dgt == 13) { /* FUSE */
1084 else if (dgt == 14) { /* Function recognition mode, OPEN */
1085 sr_info("Function recognition mode, OPEN!");
1090 devc->value += pow(10.0, cnt) * dgt;
1092 sr_spew("process_msg14() value=%f scale=%d scale1000=%d mq=%d "
1093 "unit=%d mqflags=0x%02" PRIx64, devc->value, devc->scale,
1094 devc->scale1000, devc->mq, devc->unit, (uint64_t)devc->mqflags);
1095 if (devc->value != NAN)
1096 devc->value *= pow(10, devc->scale) * pow(1000.0, devc->scale1000);
1102 sr_spew("Unknown cmd %d!", devc->buf[3]);
1109 /** Data reception callback function. */
1110 SR_PRIV int gmc_mh_1x_2x_receive_data(int fd, int revents, void *cb_data)
1112 struct sr_dev_inst *sdi;
1113 struct dev_context *devc;
1114 struct sr_serial_dev_inst *serial;
1120 if (!(sdi = cb_data))
1123 if (!(devc = sdi->priv))
1128 if (revents == G_IO_IN) { /* Serial data arrived. */
1129 while (GMC_BUFSIZE - devc->buflen - 1 > 0) {
1130 len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
1133 buf = *(devc->buf + devc->buflen);
1134 sr_spew("read 0x%02x/%d/%d", buf, buf, buf & MSGC_MASK);
1135 devc->buflen += len;
1136 if (!devc->settings_ok) {
1138 * If no device type/settings record processed
1139 * yet, wait for one.
1141 if ((devc->buf[0] & MSGID_MASK) != MSGID_INF) {
1145 devc->settings_ok = TRUE;
1148 msgt = devc->buf[0] & MSGID_MASK;
1151 if (devc->buflen == 13) {
1152 process_msg_inf_13(sdi);
1155 } else if ((devc->buflen == 10) &&
1156 (devc->model <= METRAHIT_18S)) {
1157 process_msg_inf_10(sdi);
1161 else if ((devc->buflen >= 5) &&
1162 (devc->buf[devc->buflen - 1] &
1163 MSGID_MASK) != MSGID_DATA) {
1165 * Char just received is beginning
1168 process_msg_inf_5(sdi);
1170 devc->buf[devc->buflen - 1];
1177 if (devc->buflen == 6) {
1178 process_msg_dta_6(sdi);
1183 sr_err("Comm error, unexpected data byte!");
1190 if (sr_sw_limits_check(&devc->limits))
1191 sdi->driver->dev_acquisition_stop(sdi);
1196 SR_PRIV int gmc_mh_2x_receive_data(int fd, int revents, void *cb_data)
1198 struct sr_dev_inst *sdi;
1199 struct dev_context *devc;
1200 struct sr_serial_dev_inst *serial;
1206 if (!(sdi = cb_data))
1209 if (!(devc = sdi->priv))
1214 if (revents == G_IO_IN) { /* Serial data arrived. */
1215 while (GMC_BUFSIZE - devc->buflen - 1 > 0) {
1216 len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1);
1219 buf = *(devc->buf + devc->buflen);
1220 sr_spew("read 0x%02x/%d/%d", buf, buf, buf & MASK_6BITS);
1221 devc->buf[devc->buflen] &= MASK_6BITS;
1222 devc->buflen += len;
1224 if (devc->buflen == 14) {
1225 devc->response_pending = FALSE;
1226 sr_spew("gmc_mh_2x_receive_data processing msg");
1233 if (sr_sw_limits_check(&devc->limits))
1234 sdi->driver->dev_acquisition_stop(sdi);
1236 /* Request next data set, if required */
1237 if (sdi->status == SR_ST_ACTIVE) {
1238 if (devc->response_pending) {
1239 gint64 elapsed_us = g_get_monotonic_time() - devc->req_sent_at;
1240 if (elapsed_us > (1 * 1000 * 1000)) /* Timeout! */
1241 devc->response_pending = FALSE;
1243 if (!devc->response_pending) {
1245 if (devc->cmd_seq % 10 == 0) {
1246 if (req_stat14(sdi, FALSE) != SR_OK)
1249 else if (req_meas14(sdi) != SR_OK)
1258 * Create 14 (42) byte command for Metrahit 2x multimeter in bidir mode.
1260 * Actually creates 42 bytes due to the encoding method used.
1262 * @param[in] addr Device address (0=adapter, 1..15 multimeter; for byte 0).
1263 * @param[in] func Function code (byte 3).
1264 * @param[in] params Further parameters (9 bytes)
1265 * @param[out] buf Buffer to create msg in (42 bytes).
1267 static void create_cmd_14(guchar addr, guchar func, guchar *params, guchar *buf)
1269 uint8_t dta[GMC_REPLY_SIZE]; /* Unencoded message */
1272 if (!params || !buf)
1276 dta[0] = ((addr << 2) | 0x03) & MASK_6BITS;
1278 /* 1-3: Set command header */
1283 /* 4-12: Copy further parameters */
1284 for (cnt = 0; cnt < 9; cnt++)
1285 dta[cnt + 4] = (params[cnt] & MASK_6BITS);
1287 /* 13: Checksum (b complement) */
1288 dta[13] = calc_chksum_14(dta);
1290 /* The whole message is packed into 3 bytes per byte now (lower 6 bits only) the most
1291 * peculiar way I have ever seen. Possibly to improve IR communication? */
1292 for (cnt = 0; cnt < GMC_REPLY_SIZE; cnt++) {
1293 buf[(3 * cnt) + 0] = (dta[cnt] & 0x01 ? 0x0f : 0) | (dta[cnt] & 0x02 ? 0xf0 : 0);
1294 buf[(3 * cnt) + 1] = (dta[cnt] & 0x04 ? 0x0f : 0) | (dta[cnt] & 0x08 ? 0xf0 : 0);
1295 buf[(3 * cnt) + 2] = (dta[cnt] & 0x10 ? 0x0f : 0) | (dta[cnt] & 0x20 ? 0xf0 : 0);
1299 /** Request one measurement from 2x multimeter (msg 8).
1302 int req_meas14(const struct sr_dev_inst *sdi)
1304 struct dev_context *devc;
1305 struct sr_serial_dev_inst *serial;
1309 if (!sdi || !(devc = sdi->priv) || !(serial = sdi->conn))
1312 memset(params, 0, sizeof(params));
1315 create_cmd_14(devc->addr, 8, params, msg);
1316 devc->req_sent_at = g_get_monotonic_time();
1317 if (serial_write_blocking(serial, msg, sizeof(msg),
1318 serial_timeout(serial, sizeof(msg))) < (int)sizeof(msg)) {
1322 devc->response_pending = TRUE;
1328 * Request status from 2x multimeter (msg 3).
1330 * @param[in] power_on Try to power on powered off multimeter by sending
1331 * additional messages.
1333 int req_stat14(const struct sr_dev_inst *sdi, gboolean power_on)
1335 struct dev_context *devc;
1336 struct sr_serial_dev_inst *serial;
1340 if (!sdi || !(devc = sdi->priv) || !(serial = sdi->conn))
1343 memset(params, 0, sizeof(params));
1346 create_cmd_14(devc->addr, 3, params, msg);
1349 sr_info("Write some data and wait 3s to turn on powered off device...");
1350 if (serial_write_blocking(serial, msg, sizeof(msg),
1351 serial_timeout(serial, sizeof(msg))) < 0)
1353 g_usleep(1 * 1000 * 1000);
1354 if (serial_write_blocking(serial, msg, sizeof(msg),
1355 serial_timeout(serial, sizeof(msg))) < 0)
1357 g_usleep(1 * 1000 * 1000);
1358 if (serial_write_blocking(serial, msg, sizeof(msg),
1359 serial_timeout(serial, sizeof(msg))) < 0)
1361 g_usleep(1 * 1000 * 1000);
1362 serial_flush(serial);
1365 /* Write message and wait for reply */
1366 devc->req_sent_at = g_get_monotonic_time();
1367 if (serial_write_blocking(serial, msg, sizeof(msg),
1368 serial_timeout(serial, sizeof(msg))) < (int)sizeof(msg)) {
1372 devc->response_pending = TRUE;
1377 /** Decode model in "send mode".
1379 * @param[in] mcode Model code.
1380 * @return Model code.
1382 SR_PRIV int gmc_decode_model_sm(uint8_t mcode)
1385 sr_err("decode_model(%d): Model code 0..15 expected!", mcode);
1386 return METRAHIT_NONE;
1390 case 0x04: /* 0100b */
1391 return METRAHIT_12S;
1392 case 0x08: /* 1000b */
1393 return METRAHIT_13S14A;
1394 case 0x09: /* 1001b */
1395 return METRAHIT_14S;
1396 case 0x0A: /* 1010b */
1397 return METRAHIT_15S;
1398 case 0x0B: /* 1011b */
1399 return METRAHIT_16S;
1400 case 0x06: /* 0110b (undocumented by GMC!) */
1401 return METRAHIT_16I;
1402 case 0x07: /* 0111b (undocumented by GMC!) */
1403 return METRAHIT_16T;
1404 case 0x0D: /* 1101b */
1405 return METRAHIT_18S;
1406 case 0x02: /* 0010b */
1407 return METRAHIT_22SM;
1408 case 0x03: /* 0011b */
1409 return METRAHIT_23S;
1410 case 0x0F: /* 1111b */
1411 return METRAHIT_24S;
1412 case 0x05: /* 0101b */
1413 return METRAHIT_25S;
1414 case 0x01: /* 0001b */
1415 return METRAHIT_26SM;
1416 case 0x0C: /* 1100b */
1417 return METRAHIT_28S;
1418 case 0x0E: /* 1110b */
1419 return METRAHIT_29S;
1421 sr_err("Unknown model code %d!", mcode);
1422 return METRAHIT_NONE;
1427 * Convert GMC model code in bidirectional mode to sigrok-internal one.
1429 * @param[in] mcode Model code.
1431 * @return Model code.
1433 SR_PRIV int gmc_decode_model_bd(uint8_t mcode)
1435 switch (mcode & 0x1f) {
1438 return METRAHIT_22M;
1440 return METRAHIT_22S;
1442 return METRAHIT_23S;
1444 return METRAHIT_24S;
1446 return METRAHIT_25S;
1449 return METRAHIT_26M;
1451 return METRAHIT_26S;
1453 return METRAHIT_28S;
1455 return METRAHIT_29S;
1457 sr_err("Unknown model code %d!", mcode);
1458 return METRAHIT_NONE;
1463 * Convert sigrok-internal model code to string.
1465 * @param[in] mcode Model code.
1467 * @return Model code string.
1469 SR_PRIV const char *gmc_model_str(enum model mcode)
1473 return "-uninitialized model variable-";
1475 return "METRAHit 12S";
1476 case METRAHIT_13S14A:
1477 return "METRAHit 13S/14A";
1479 return "METRAHit 14S";
1481 return "METRAHit 15S";
1483 return "METRAHit 16S";
1485 return "METRAHit 16I/16L";
1487 return "METRAHit 16T/16U/KMM2002";
1489 return "METRAHit 18S";
1491 return "METRAHit 22S/M";
1493 return "METRAHit 22S";
1495 return "METRAHit 22M";
1497 return "METRAHit 23S";
1499 return "METRAHit 24S";
1501 return "METRAHit 25S";
1503 return "METRAHit 26S/M";
1505 return "METRAHit 26S";
1507 return "METRAHit 26M";
1509 return "METRAHit 28S";
1511 return "METRAHit 29S";
1513 return "Unknown model code";
1517 /** @copydoc sr_dev_driver.config_set */
1518 SR_PRIV int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
1519 const struct sr_channel_group *cg)
1521 struct dev_context *devc;
1527 if (sdi->status != SR_ST_ACTIVE)
1528 return SR_ERR_DEV_CLOSED;
1533 case SR_CONF_POWER_OFF:
1534 if (devc->model < METRAHIT_2X)
1536 if (!g_variant_get_boolean(data))
1538 sr_info("Powering device off.");
1540 memset(params, 0, sizeof(params));
1543 create_cmd_14(devc->addr, 6, params, msg);
1544 if (serial_write_blocking(sdi->conn, msg, sizeof(msg),
1545 serial_timeout(sdi->conn, sizeof(msg))) < 0)
1548 g_usleep(2 * 1000 * 1000); /* Wait to ensure transfer before interface switched off. */
1550 case SR_CONF_LIMIT_SAMPLES:
1551 case SR_CONF_LIMIT_MSEC:
1552 return sr_sw_limits_config_set(&devc->limits, key, data);