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bfd48770 MH |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz> | |
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 | ||
a4e435eb MH |
20 | /** @file |
21 | * Norma DM9x0/Siemens B102x DMMs driver. | |
22 | * @internal | |
23 | */ | |
24 | ||
6ec6c43b | 25 | #include <config.h> |
bfd48770 MH |
26 | #include "protocol.h" |
27 | ||
07ffa5b3 UH |
28 | #define LINE_LENGTH 20 |
29 | ||
e790bd5c UH |
30 | SR_PRIV const struct nmadmm_req nmadmm_requests[] = { |
31 | { NMADMM_REQ_IDN, "IDN?" }, | |
32 | { NMADMM_REQ_IDN, "STATUS?" }, | |
1b4aedc0 | 33 | ALL_ZERO |
e790bd5c UH |
34 | }; |
35 | ||
36 | static int nma_send_req(const struct sr_dev_inst *sdi, int req, char *params) | |
37 | { | |
38 | struct sr_serial_dev_inst *serial; | |
39 | struct dev_context *devc; | |
40 | char buf[NMADMM_BUFSIZE]; | |
41 | int len; | |
42 | ||
43 | if (!sdi || !(serial = sdi->conn) || !(devc = sdi->priv)) | |
44 | return SR_ERR_BUG; | |
f8e76e2e | 45 | |
e790bd5c UH |
46 | len = snprintf(buf, sizeof(buf), "%s%s\r\n", |
47 | nmadmm_requests[req].req_str, params ? params : ""); | |
f8e76e2e | 48 | |
e790bd5c | 49 | sr_spew("Sending request: '%s'.", buf); |
f8e76e2e | 50 | |
e790bd5c UH |
51 | devc->last_req = req; |
52 | devc->last_req_pending = TRUE; | |
f8e76e2e | 53 | |
d545c81c UH |
54 | if (serial_write_blocking(serial, buf, len, |
55 | serial_timeout(serial, len)) < 0) { | |
92714255 | 56 | sr_err("Unable to send request."); |
e790bd5c UH |
57 | devc->last_req_pending = FALSE; |
58 | return SR_ERR; | |
59 | } | |
60 | ||
a4e435eb MH |
61 | devc->req_sent_at = g_get_monotonic_time(); |
62 | ||
e790bd5c UH |
63 | return SR_OK; |
64 | } | |
65 | ||
66 | /** | |
67 | * Convert hexadecimal digit to int. | |
68 | * | |
69 | * @param[in] xgit Hexadecimal digit to convert. | |
70 | * @return Int value of xgit (0 on invalid xgit). | |
f8e76e2e MH |
71 | */ |
72 | SR_PRIV int xgittoint(char xgit) | |
73 | { | |
74 | if ((xgit >= '0') && (xgit <= '9')) | |
75 | return xgit - '0'; | |
76 | xgit = tolower(xgit); | |
77 | if ((xgit >= 'a') && (xgit <= 'f')) | |
78 | return xgit - 'a'; | |
79 | return 0; | |
80 | } | |
81 | ||
e790bd5c | 82 | /** |
04cb9157 | 83 | * Process received line. It consists of 20 hex digits + \\r\\n, |
e790bd5c UH |
84 | * e.g. '08100400018100400000'. |
85 | */ | |
f8e76e2e MH |
86 | static void nma_process_line(const struct sr_dev_inst *sdi) |
87 | { | |
88 | struct dev_context *devc; | |
89 | int pos, flags; | |
90 | int vt, range; /* Measurement value type, range in device format */ | |
91 | int mmode, devstat; /* Measuring mode, device status */ | |
92 | float value; /* Measured value */ | |
93 | float scale; /* Scaling factor depending on range and function */ | |
5faebab2 | 94 | struct sr_datafeed_analog_old analog; |
f8e76e2e MH |
95 | struct sr_datafeed_packet packet; |
96 | ||
97 | devc = sdi->priv; | |
98 | ||
07ffa5b3 | 99 | devc->buf[LINE_LENGTH] = '\0'; |
f8e76e2e MH |
100 | |
101 | sr_spew("Received line '%s'.", devc->buf); | |
102 | ||
e790bd5c | 103 | /* Check line. */ |
07ffa5b3 | 104 | if (strlen((const char *)devc->buf) != LINE_LENGTH) { |
e790bd5c UH |
105 | sr_err("line: Invalid status '%s', must be 20 hex digits.", |
106 | devc->buf); | |
f8e76e2e MH |
107 | devc->buflen = 0; |
108 | return; | |
109 | } | |
e790bd5c | 110 | |
07ffa5b3 | 111 | for (pos = 0; pos < LINE_LENGTH; pos++) { |
f8e76e2e MH |
112 | if (!isxdigit(devc->buf[pos])) { |
113 | sr_err("line: Expected hex digit in '%s' at pos %d!", | |
114 | devc->buf, pos); | |
115 | devc->buflen = 0; | |
116 | return; | |
117 | } | |
e790bd5c | 118 | } |
f8e76e2e MH |
119 | |
120 | /* Start decoding. */ | |
121 | value = 0.0; | |
122 | scale = 1.0; | |
5faebab2 | 123 | memset(&analog, 0, sizeof(struct sr_datafeed_analog_old)); |
f8e76e2e | 124 | |
e790bd5c UH |
125 | /* |
126 | * The numbers are hex digits, starting from 0. | |
127 | * 0: Keyboard status, currently not interesting. | |
128 | * 1: Central switch status, currently not interesting. | |
129 | * 2: Type of measured value. | |
130 | */ | |
f8e76e2e MH |
131 | vt = xgittoint(devc->buf[2]); |
132 | switch (vt) { | |
e790bd5c UH |
133 | case 0: |
134 | analog.mq = SR_MQ_VOLTAGE; | |
f8e76e2e | 135 | break; |
e790bd5c UH |
136 | case 1: |
137 | analog.mq = SR_MQ_CURRENT; /* 2A */ | |
f8e76e2e | 138 | break; |
e790bd5c UH |
139 | case 2: |
140 | analog.mq = SR_MQ_RESISTANCE; | |
f8e76e2e | 141 | break; |
e790bd5c UH |
142 | case 3: |
143 | analog.mq = SR_MQ_CAPACITANCE; | |
f8e76e2e | 144 | break; |
e790bd5c UH |
145 | case 4: |
146 | analog.mq = SR_MQ_TEMPERATURE; | |
f8e76e2e | 147 | break; |
e790bd5c UH |
148 | case 5: |
149 | analog.mq = SR_MQ_FREQUENCY; | |
f8e76e2e | 150 | break; |
e790bd5c UH |
151 | case 6: |
152 | analog.mq = SR_MQ_CURRENT; /* 10A */ | |
f8e76e2e | 153 | break; |
e790bd5c UH |
154 | case 7: |
155 | analog.mq = SR_MQ_GAIN; /* TODO: Scale factor */ | |
f8e76e2e | 156 | break; |
e790bd5c UH |
157 | case 8: |
158 | analog.mq = SR_MQ_GAIN; /* Percentage */ | |
f8e76e2e MH |
159 | scale /= 100.0; |
160 | break; | |
e790bd5c UH |
161 | case 9: |
162 | analog.mq = SR_MQ_GAIN; /* dB */ | |
f8e76e2e MH |
163 | scale /= 100.0; |
164 | break; | |
e790bd5c UH |
165 | default: |
166 | sr_err("Unknown value type: 0x%02x.", vt); | |
167 | break; | |
f8e76e2e | 168 | } |
e790bd5c | 169 | |
f8e76e2e MH |
170 | /* 3: Measurement range for measured value */ |
171 | range = xgittoint(devc->buf[3]); | |
172 | switch (vt) { | |
e790bd5c | 173 | case 0: /* V */ |
f8e76e2e MH |
174 | scale *= pow(10.0, range - 5); |
175 | break; | |
e790bd5c | 176 | case 1: /* A */ |
f8e76e2e MH |
177 | scale *= pow(10.0, range - 7); |
178 | break; | |
e790bd5c | 179 | case 2: /* Ω */ |
f8e76e2e MH |
180 | scale *= pow(10.0, range - 2); |
181 | break; | |
e790bd5c | 182 | case 3: /* F */ |
f8e76e2e MH |
183 | scale *= pow(10.0, range - 12); |
184 | break; | |
e790bd5c | 185 | case 4: /* °C */ |
f8e76e2e MH |
186 | scale *= pow(10.0, range - 1); |
187 | break; | |
e790bd5c | 188 | case 5: /* Hz */ |
f8e76e2e MH |
189 | scale *= pow(10.0, range - 2); |
190 | break; | |
e790bd5c | 191 | // No default, other value types have fixed display format. |
f8e76e2e MH |
192 | } |
193 | ||
194 | /* 5: Sign and 1st digit */ | |
195 | flags = xgittoint(devc->buf[5]); | |
196 | value = (flags & 0x03); | |
e790bd5c UH |
197 | if (flags & 0x04) |
198 | scale *= -1; | |
199 | ||
f8e76e2e MH |
200 | /* 6-9: 2nd-4th digit */ |
201 | for (pos = 6; pos < 10; pos++) | |
202 | value = value * 10 + xgittoint(devc->buf[pos]); | |
203 | value *= scale; | |
204 | ||
205 | /* 10: Display counter */ | |
206 | mmode = xgittoint(devc->buf[10]); | |
207 | switch (mmode) { | |
e790bd5c | 208 | case 0: /* Frequency */ |
f8e76e2e MH |
209 | analog.unit = SR_UNIT_HERTZ; |
210 | break; | |
e790bd5c | 211 | case 1: /* V TRMS, only type 5 */ |
f8e76e2e MH |
212 | analog.unit = SR_UNIT_VOLT; |
213 | analog.mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS); | |
214 | break; | |
e790bd5c | 215 | case 2: /* V AC */ |
f8e76e2e MH |
216 | analog.unit = SR_UNIT_VOLT; |
217 | analog.mqflags |= SR_MQFLAG_AC; | |
e790bd5c UH |
218 | if (devc->type >= 3) |
219 | analog.mqflags |= SR_MQFLAG_RMS; | |
f8e76e2e | 220 | break; |
e790bd5c | 221 | case 3: /* V DC */ |
f8e76e2e MH |
222 | analog.unit = SR_UNIT_VOLT; |
223 | analog.mqflags |= SR_MQFLAG_DC; | |
224 | break; | |
e790bd5c | 225 | case 4: /* Ohm */ |
f8e76e2e MH |
226 | analog.unit = SR_UNIT_OHM; |
227 | break; | |
e790bd5c | 228 | case 5: /* Continuity */ |
f8e76e2e MH |
229 | analog.unit = SR_UNIT_BOOLEAN; |
230 | analog.mq = SR_MQ_CONTINUITY; | |
e790bd5c | 231 | /* TODO: Continuity handling is a bit odd in libsigrok. */ |
f8e76e2e MH |
232 | break; |
233 | case 6: /* Degree Celsius */ | |
234 | analog.unit = SR_UNIT_CELSIUS; | |
235 | break; | |
e790bd5c | 236 | case 7: /* Capacity */ |
f8e76e2e MH |
237 | analog.unit = SR_UNIT_FARAD; |
238 | break; | |
239 | case 8: /* Current DC */ | |
240 | analog.unit = SR_UNIT_AMPERE; | |
241 | analog.mqflags |= SR_MQFLAG_DC; | |
242 | break; | |
e790bd5c | 243 | case 9: /* Current AC */ |
f8e76e2e MH |
244 | analog.unit = SR_UNIT_AMPERE; |
245 | analog.mqflags |= SR_MQFLAG_AC; | |
e790bd5c UH |
246 | if (devc->type >= 3) |
247 | analog.mqflags |= SR_MQFLAG_RMS; | |
f8e76e2e | 248 | break; |
e790bd5c | 249 | case 0xa: /* Current TRMS, only type 5 */ |
f8e76e2e MH |
250 | analog.unit = SR_UNIT_AMPERE; |
251 | analog.mqflags |= (SR_MQFLAG_AC | SR_MQFLAG_DC | SR_MQFLAG_RMS); | |
252 | break; | |
e790bd5c | 253 | case 0xb: /* Diode */ |
f8e76e2e MH |
254 | analog.unit = SR_UNIT_VOLT; |
255 | analog.mqflags |= (SR_MQFLAG_DIODE | SR_MQFLAG_DC); | |
256 | break; | |
257 | default: | |
e790bd5c | 258 | sr_err("Unknown mmode: 0x%02x.", mmode); |
f8e76e2e MH |
259 | break; |
260 | } | |
261 | ||
262 | /* 11: Device status */ | |
263 | devstat = xgittoint(devc->buf[11]); | |
264 | ||
265 | switch (devstat) { | |
e790bd5c | 266 | case 1: /* Normal measurement */ |
f8e76e2e | 267 | break; |
e790bd5c | 268 | case 2: /* Input loop (limit, reference values) */ |
f8e76e2e | 269 | break; |
e790bd5c | 270 | case 3: /* TRANS/SENS */ |
f8e76e2e | 271 | break; |
e790bd5c UH |
272 | case 4: /* Error */ |
273 | sr_err("Device error. Fuse?"); /* TODO: Really abort? */ | |
f8e76e2e | 274 | devc->buflen = 0; |
e790bd5c | 275 | return; /* Cannot continue. */ |
f8e76e2e | 276 | default: |
e790bd5c | 277 | sr_err("Unknown device status: 0x%02x", devstat); |
f8e76e2e MH |
278 | break; |
279 | } | |
280 | ||
281 | /* 12-19: Flags and display symbols */ | |
282 | /* 12, 13 */ | |
283 | flags = (xgittoint(devc->buf[12]) << 8) | xgittoint(devc->buf[13]); | |
284 | /* 0x80: PRINT TODO: Stop polling when discovered? */ | |
e790bd5c | 285 | /* 0x40: EXTR */ |
f8e76e2e | 286 | if (analog.mq == SR_MQ_CONTINUITY) { |
e790bd5c UH |
287 | if (flags & 0x20) |
288 | value = 1.0; /* Beep */ | |
289 | else | |
290 | value = 0.0; | |
f8e76e2e MH |
291 | } |
292 | /* 0x10: AVG */ | |
293 | /* 0x08: Diode */ | |
294 | if (flags & 0x04) /* REL */ | |
295 | analog.mqflags |= SR_MQFLAG_RELATIVE; | |
296 | /* 0x02: SHIFT */ | |
297 | if (flags & 0x01) /* % */ | |
298 | analog.unit = SR_UNIT_PERCENTAGE; | |
299 | ||
300 | /* 14, 15 */ | |
301 | flags = (xgittoint(devc->buf[14]) << 8) | xgittoint(devc->buf[15]); | |
e790bd5c | 302 | if (!(flags & 0x80)) /* MAN: Manual range */ |
f8e76e2e | 303 | analog.mqflags |= SR_MQFLAG_AUTORANGE; |
e790bd5c | 304 | if (flags & 0x40) /* LOBATT1: Low battery, measurement still within specs */ |
f8e76e2e | 305 | devc->lowbatt = 1; |
e790bd5c UH |
306 | /* 0x20: PEAK */ |
307 | /* 0x10: COUNT */ | |
308 | if (flags & 0x08) /* HOLD */ | |
f8e76e2e MH |
309 | analog.mqflags |= SR_MQFLAG_HOLD; |
310 | /* 0x04: LIMIT */ | |
e790bd5c | 311 | if (flags & 0x02) /* MAX */ |
f8e76e2e | 312 | analog.mqflags |= SR_MQFLAG_MAX; |
e790bd5c | 313 | if (flags & 0x01) /* MIN */ |
f8e76e2e MH |
314 | analog.mqflags |= SR_MQFLAG_MIN; |
315 | ||
316 | /* 16, 17 */ | |
317 | flags = (xgittoint(devc->buf[16]) << 8) | xgittoint(devc->buf[17]); | |
318 | /* 0xe0: undefined */ | |
e790bd5c | 319 | if (flags & 0x10) { /* LOBATT2: Low battery, measurement inaccurate */ |
f8e76e2e MH |
320 | devc->lowbatt = 2; |
321 | sr_warn("Low battery, measurement quality degraded!"); | |
322 | } | |
323 | /* 0x08: SCALED */ | |
f3f19d11 | 324 | /* 0x04: RATE (=lower resolution, allows higher data rate up to 10/s. */ |
e790bd5c UH |
325 | /* 0x02: Current clamp */ |
326 | if (flags & 0x01) { /* dB */ | |
327 | /* | |
328 | * TODO: The Norma has an adjustable dB reference value. If | |
329 | * changed from default, this is not correct. | |
330 | */ | |
f8e76e2e MH |
331 | if (analog.unit == SR_UNIT_VOLT) |
332 | analog.unit = SR_UNIT_DECIBEL_VOLT; | |
f8e76e2e MH |
333 | else |
334 | analog.unit = SR_UNIT_UNITLESS; | |
335 | } | |
336 | ||
337 | /* 18, 19 */ | |
e790bd5c | 338 | /* flags = (xgittoint(devc->buf[18]) << 8) | xgittoint(devc->buf[19]); */ |
f8e76e2e MH |
339 | /* 0x80: Undefined. */ |
340 | /* 0x40: Remote mode, keyboard locked */ | |
341 | /* 0x38: Undefined. */ | |
e790bd5c | 342 | /* 0x04: MIN > MAX */ |
f8e76e2e MH |
343 | /* 0x02: Measured value < Min */ |
344 | /* 0x01: Measured value > Max */ | |
345 | ||
e790bd5c | 346 | /* 4: Flags. Evaluating this after setting value! */ |
f8e76e2e | 347 | flags = xgittoint(devc->buf[4]); |
e790bd5c | 348 | if (flags & 0x04) /* Invalid value */ |
f8e76e2e | 349 | value = NAN; |
e790bd5c | 350 | else if (flags & 0x01) /* Overload */ |
f8e76e2e | 351 | value = INFINITY; |
e790bd5c | 352 | if (flags & 0x02) { /* Duplicate value, has been sent before. */ |
f8e76e2e MH |
353 | sr_spew("Duplicate value, dismissing!"); |
354 | devc->buflen = 0; | |
355 | return; | |
356 | } | |
357 | ||
e790bd5c UH |
358 | sr_spew("range=%d/scale=%f/value=%f", range, |
359 | (double)scale, (double)value); | |
f8e76e2e | 360 | |
e790bd5c | 361 | /* Finish and send packet. */ |
ba7dd8bb | 362 | analog.channels = sdi->channels; |
f8e76e2e MH |
363 | analog.num_samples = 1; |
364 | analog.data = &value; | |
365 | ||
d0148a50 | 366 | memset(&packet, 0, sizeof(struct sr_datafeed_packet)); |
5faebab2 | 367 | packet.type = SR_DF_ANALOG_OLD; |
f8e76e2e | 368 | packet.payload = &analog; |
695dc859 | 369 | sr_session_send(sdi, &packet); |
f8e76e2e | 370 | |
e790bd5c | 371 | /* Finish processing. */ |
37dbffd1 | 372 | sr_sw_limits_update_samples_read(&devc->limits, 1); |
f8e76e2e MH |
373 | devc->buflen = 0; |
374 | } | |
375 | ||
bfd48770 MH |
376 | SR_PRIV int norma_dmm_receive_data(int fd, int revents, void *cb_data) |
377 | { | |
f8e76e2e | 378 | struct sr_dev_inst *sdi; |
bfd48770 | 379 | struct dev_context *devc; |
f8e76e2e MH |
380 | struct sr_serial_dev_inst *serial; |
381 | int len; | |
bfd48770 MH |
382 | |
383 | (void)fd; | |
384 | ||
385 | if (!(sdi = cb_data)) | |
386 | return TRUE; | |
387 | ||
388 | if (!(devc = sdi->priv)) | |
389 | return TRUE; | |
390 | ||
f8e76e2e | 391 | serial = sdi->conn; |
bfd48770 | 392 | if (revents == G_IO_IN) { |
f8e76e2e | 393 | /* Serial data arrived. */ |
e790bd5c | 394 | while (NMADMM_BUFSIZE - devc->buflen - 1 > 0) { |
32950cc0 | 395 | len = serial_read_nonblocking(serial, devc->buf + devc->buflen, 1); |
f8e76e2e MH |
396 | if (len < 1) |
397 | break; | |
398 | devc->buflen += len; | |
399 | *(devc->buf + devc->buflen) = '\0'; | |
400 | if (*(devc->buf + devc->buflen - 1) == '\n') { | |
e790bd5c UH |
401 | /* |
402 | * TODO: According to specs, should be \r, but | |
403 | * then we'd have to get rid of the \n. | |
404 | */ | |
f8e76e2e MH |
405 | devc->last_req_pending = FALSE; |
406 | nma_process_line(sdi); | |
407 | break; | |
408 | } | |
409 | } | |
410 | } | |
411 | ||
37dbffd1 | 412 | if (sr_sw_limits_check(&devc->limits)) { |
695dc859 | 413 | sdi->driver->dev_acquisition_stop(sdi); |
37dbffd1 LPC |
414 | } else { |
415 | /* Request next package. */ | |
a4e435eb MH |
416 | if (devc->last_req_pending) { |
417 | gint64 elapsed_us = g_get_monotonic_time() - devc->req_sent_at; | |
418 | if (elapsed_us > NMADMM_TIMEOUT_MS * 1000) {/* Timeout! */ | |
419 | sr_spew("Request timeout!"); | |
420 | devc->last_req_pending = FALSE; | |
421 | } | |
422 | } | |
423 | if (!devc->last_req_pending) { | |
424 | if (nma_send_req(sdi, NMADMM_REQ_STATUS, NULL) != SR_OK) | |
425 | return FALSE; | |
426 | } | |
bfd48770 MH |
427 | } |
428 | ||
429 | return TRUE; | |
430 | } |