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ac913e5c | 1 | /* |
50985c20 | 2 | * This file is part of the libsigrok project. |
ac913e5c | 3 | * |
71f1302b | 4 | * Copyright (C) 2012-2013 Uwe Hermann <uwe@hermann-uwe.de> |
ac913e5c UH |
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 2 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 | |
2ea1fdf1 | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
ac913e5c UH |
18 | */ |
19 | ||
e83437ae MH |
20 | /** |
21 | * @file | |
22 | * | |
ac913e5c UH |
23 | * Metex 14-bytes ASCII protocol parser. |
24 | * | |
25 | * This should work for various multimeters which use this kind of protocol, | |
26 | * even though there is some variation in which modes each DMM supports. | |
27 | * | |
28 | * It does _not_ work for all Metex DMMs, some use a quite different protocol. | |
29 | */ | |
30 | ||
6ec6c43b | 31 | #include <config.h> |
ac913e5c | 32 | #include <string.h> |
ba464a12 | 33 | #include <strings.h> |
ac913e5c UH |
34 | #include <ctype.h> |
35 | #include <math.h> | |
36 | #include <glib.h> | |
c1aae900 | 37 | #include <libsigrok/libsigrok.h> |
ac913e5c UH |
38 | #include "libsigrok-internal.h" |
39 | ||
3544f848 | 40 | #define LOG_PREFIX "metex14" |
ac913e5c | 41 | |
e83437ae MH |
42 | /** Parse value from buf, byte 2-8. */ |
43 | static int parse_value(const uint8_t *buf, struct metex14_info *info, | |
e677490e | 44 | float *result, int *exponent) |
ac913e5c | 45 | { |
e677490e | 46 | int i, is_ol, cnt, dot_pos; |
1a807c13 UH |
47 | char valstr[7 + 1]; |
48 | ||
49 | /* Strip all spaces from bytes 2-8. */ | |
50 | memset(&valstr, 0, 7 + 1); | |
51 | for (i = 0, cnt = 0; i < 7; i++) { | |
52 | if (buf[2 + i] != ' ') | |
53 | valstr[cnt++] = buf[2 + i]; | |
ac913e5c UH |
54 | } |
55 | ||
56 | /* Bytes 5-7: Over limit (various forms) */ | |
57 | is_ol = 0; | |
34577da6 UH |
58 | is_ol += (!g_ascii_strcasecmp((const char *)&valstr, ".OL")) ? 1 : 0; |
59 | is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "O.L")) ? 1 : 0; | |
60 | is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "OL.")) ? 1 : 0; | |
61 | is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "OL")) ? 1 : 0; | |
62 | is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "-.OL")) ? 1 : 0; | |
63 | is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "-O.L")) ? 1 : 0; | |
64 | is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "-OL.")) ? 1 : 0; | |
65 | is_ol += (!g_ascii_strcasecmp((const char *)&valstr, "-OL")) ? 1 : 0; | |
ac913e5c UH |
66 | if (is_ol != 0) { |
67 | sr_spew("Over limit."); | |
68 | *result = INFINITY; | |
69 | return SR_OK; | |
70 | } | |
71 | ||
e83437ae MH |
72 | /* Logic functions */ |
73 | if (!strcmp((const char *)&valstr, "READY") || | |
74 | !strcmp((const char *)&valstr, "FLOAT")) { | |
75 | *result = INFINITY; | |
76 | info->is_logic = TRUE; | |
77 | } else if (!strcmp((const char *)&valstr, "Hi")) { | |
78 | *result = 1.0; | |
79 | info->is_logic = TRUE; | |
80 | } else if (!strcmp((const char *)&valstr, "Lo")) { | |
81 | *result = 0.0; | |
82 | info->is_logic = TRUE; | |
83 | } | |
84 | if (info->is_logic) | |
85 | return SR_OK; | |
86 | ||
1a807c13 | 87 | /* Bytes 2-8: Sign, value (up to 5 digits) and decimal point */ |
4f0463a0 | 88 | sr_atof_ascii((const char *)&valstr, result); |
ac913e5c | 89 | |
e677490e AJ |
90 | dot_pos = strcspn(valstr, "."); |
91 | if (dot_pos < cnt) | |
92 | *exponent = -(cnt - dot_pos - 1); | |
93 | else | |
94 | *exponent = 0; | |
95 | ||
1a807c13 | 96 | sr_spew("The display value is %f.", *result); |
ac913e5c UH |
97 | |
98 | return SR_OK; | |
99 | } | |
100 | ||
101 | static void parse_flags(const char *buf, struct metex14_info *info) | |
102 | { | |
71f1302b UH |
103 | int i, cnt; |
104 | char unit[4 + 1]; | |
105 | const char *u; | |
106 | ||
e83437ae MH |
107 | /* Bytes 0-1: Measurement mode AC, DC */ |
108 | info->is_ac = !strncmp(buf, "AC", 2); | |
109 | info->is_dc = !strncmp(buf, "DC", 2); | |
ac913e5c | 110 | |
1a807c13 | 111 | /* Bytes 2-8: See parse_value(). */ |
ac913e5c | 112 | |
1a807c13 | 113 | /* Strip all spaces from bytes 9-12. */ |
71f1302b UH |
114 | memset(&unit, 0, 4 + 1); |
115 | for (i = 0, cnt = 0; i < 4; i++) { | |
116 | if (buf[9 + i] != ' ') | |
117 | unit[cnt++] = buf[9 + i]; | |
118 | } | |
1a807c13 UH |
119 | |
120 | /* Bytes 9-12: Unit */ | |
71f1302b | 121 | u = (const char *)&unit; |
34577da6 | 122 | if (!g_ascii_strcasecmp(u, "A")) |
ac913e5c | 123 | info->is_ampere = TRUE; |
34577da6 | 124 | else if (!g_ascii_strcasecmp(u, "mA")) |
ac913e5c | 125 | info->is_milli = info->is_ampere = TRUE; |
34577da6 | 126 | else if (!g_ascii_strcasecmp(u, "uA")) |
2477fb95 | 127 | info->is_micro = info->is_ampere = TRUE; |
34577da6 | 128 | else if (!g_ascii_strcasecmp(u, "V")) |
ac913e5c | 129 | info->is_volt = TRUE; |
34577da6 | 130 | else if (!g_ascii_strcasecmp(u, "mV")) |
ac913e5c | 131 | info->is_milli = info->is_volt = TRUE; |
34577da6 | 132 | else if (!g_ascii_strcasecmp(u, "Ohm")) |
ac913e5c | 133 | info->is_ohm = TRUE; |
34577da6 | 134 | else if (!g_ascii_strcasecmp(u, "KOhm")) |
ac913e5c | 135 | info->is_kilo = info->is_ohm = TRUE; |
34577da6 | 136 | else if (!g_ascii_strcasecmp(u, "MOhm")) |
ac913e5c | 137 | info->is_mega = info->is_ohm = TRUE; |
34577da6 | 138 | else if (!g_ascii_strcasecmp(u, "pF")) |
c02dc3e2 | 139 | info->is_pico = info->is_farad = TRUE; |
34577da6 | 140 | else if (!g_ascii_strcasecmp(u, "nF")) |
ac913e5c | 141 | info->is_nano = info->is_farad = TRUE; |
34577da6 | 142 | else if (!g_ascii_strcasecmp(u, "uF")) |
ac913e5c | 143 | info->is_micro = info->is_farad = TRUE; |
34577da6 | 144 | else if (!g_ascii_strcasecmp(u, "KHz")) |
ac913e5c | 145 | info->is_kilo = info->is_hertz = TRUE; |
34577da6 | 146 | else if (!g_ascii_strcasecmp(u, "C")) |
ac913e5c | 147 | info->is_celsius = TRUE; |
7fb4ff02 FS |
148 | else if (!g_ascii_strcasecmp(u, "F")) |
149 | info->is_fahrenheit = TRUE; | |
34577da6 | 150 | else if (!g_ascii_strcasecmp(u, "DB")) |
9871215c | 151 | info->is_decibel = TRUE; |
7fb4ff02 FS |
152 | else if (!g_ascii_strcasecmp(u, "dBm")) |
153 | info->is_decibel_mw = TRUE; | |
154 | else if (!g_ascii_strcasecmp(u, "W")) | |
155 | info->is_watt = TRUE; | |
34577da6 | 156 | else if (!g_ascii_strcasecmp(u, "")) |
9871215c | 157 | info->is_unitless = TRUE; |
ac913e5c | 158 | |
e83437ae | 159 | /* Bytes 0-1: Measurement mode, except AC/DC */ |
d9251a2c | 160 | info->is_resistance = !strncmp(buf, "OH", 2) || |
e83437ae | 161 | (!strncmp(buf, " ", 2) && info->is_ohm); |
d9251a2c | 162 | info->is_capacity = !strncmp(buf, "CA", 2) || |
e83437ae | 163 | (!strncmp(buf, " ", 2) && info->is_farad); |
7fb4ff02 FS |
164 | info->is_temperature = !strncmp(buf, "TE", 2) || |
165 | info->is_celsius || info->is_fahrenheit; | |
d9251a2c | 166 | info->is_diode = !strncmp(buf, "DI", 2) || |
e83437ae | 167 | (!strncmp(buf, " ", 2) && info->is_volt && info->is_milli); |
d9251a2c | 168 | info->is_frequency = !strncmp(buf, "FR", 2) || |
e83437ae | 169 | (!strncmp(buf, " ", 2) && info->is_hertz); |
7fb4ff02 FS |
170 | info->is_gain = !strncmp(buf, "DB", 2) && info->is_decibel; |
171 | info->is_power = (!strncmp(buf, "dB", 2) && info->is_decibel_mw) || | |
172 | ((!strncmp(buf, "WT", 2) && info->is_watt)); | |
fd8dc1db | 173 | info->is_power_factor = !strncmp(buf, "CO", 2) && info->is_unitless; |
d9251a2c | 174 | info->is_hfe = !strncmp(buf, "HF", 2) || |
cd97e39d FS |
175 | (!strncmp(buf, " ", 2) && !info->is_ampere &&!info->is_volt && |
176 | !info->is_resistance && !info->is_capacity && !info->is_frequency && | |
177 | !info->is_temperature && !info->is_power && !info->is_power_factor && | |
178 | !info->is_gain && !info->is_logic && !info->is_diode); | |
7fb4ff02 FS |
179 | info->is_min = !strncmp(buf, "MN", 2); |
180 | info->is_max = !strncmp(buf, "MX", 2); | |
181 | info->is_avg = !strncmp(buf, "AG", 2); | |
182 | ||
e83437ae MH |
183 | /* |
184 | * Note: | |
185 | * - Protocol doesn't distinguish "resistance" from "beep" mode. | |
186 | * - "DB" shows the logarithmic ratio of input voltage to a | |
187 | * pre-stored (user-changeable) value in the DMM. | |
188 | */ | |
189 | ||
ac913e5c UH |
190 | /* Byte 13: Always '\r' (carriage return, 0x0d, 13) */ |
191 | } | |
192 | ||
b02bb45f | 193 | static void handle_flags(struct sr_datafeed_analog *analog, float *floatval, |
e677490e | 194 | int *exponent, const struct metex14_info *info) |
ac913e5c | 195 | { |
7fb4ff02 FS |
196 | int factor; |
197 | ||
ac913e5c | 198 | /* Factors */ |
7fb4ff02 | 199 | factor = 0; |
c02dc3e2 | 200 | if (info->is_pico) |
e677490e | 201 | factor -= 12; |
ac913e5c | 202 | if (info->is_nano) |
e677490e | 203 | factor -= 9; |
ac913e5c | 204 | if (info->is_micro) |
e677490e | 205 | factor -= 6; |
ac913e5c | 206 | if (info->is_milli) |
e677490e | 207 | factor -= 3; |
ac913e5c | 208 | if (info->is_kilo) |
e677490e | 209 | factor += 3; |
ac913e5c | 210 | if (info->is_mega) |
e677490e AJ |
211 | factor += 6; |
212 | *floatval *= powf(10, factor); | |
762356c3 | 213 | *exponent += factor; |
ac913e5c UH |
214 | |
215 | /* Measurement modes */ | |
216 | if (info->is_volt) { | |
b02bb45f UH |
217 | analog->meaning->mq = SR_MQ_VOLTAGE; |
218 | analog->meaning->unit = SR_UNIT_VOLT; | |
ac913e5c UH |
219 | } |
220 | if (info->is_ampere) { | |
b02bb45f UH |
221 | analog->meaning->mq = SR_MQ_CURRENT; |
222 | analog->meaning->unit = SR_UNIT_AMPERE; | |
ac913e5c UH |
223 | } |
224 | if (info->is_ohm) { | |
b02bb45f UH |
225 | analog->meaning->mq = SR_MQ_RESISTANCE; |
226 | analog->meaning->unit = SR_UNIT_OHM; | |
ac913e5c UH |
227 | } |
228 | if (info->is_hertz) { | |
b02bb45f UH |
229 | analog->meaning->mq = SR_MQ_FREQUENCY; |
230 | analog->meaning->unit = SR_UNIT_HERTZ; | |
ac913e5c UH |
231 | } |
232 | if (info->is_farad) { | |
b02bb45f UH |
233 | analog->meaning->mq = SR_MQ_CAPACITANCE; |
234 | analog->meaning->unit = SR_UNIT_FARAD; | |
ac913e5c | 235 | } |
7fb4ff02 | 236 | if (info->is_temperature) { |
b02bb45f | 237 | analog->meaning->mq = SR_MQ_TEMPERATURE; |
7fb4ff02 FS |
238 | if (info->is_celsius) |
239 | analog->meaning->unit = SR_UNIT_CELSIUS; | |
240 | else if (info->is_fahrenheit) | |
241 | analog->meaning->unit = SR_UNIT_FAHRENHEIT; | |
242 | else | |
243 | analog->meaning->unit = SR_UNIT_UNITLESS; | |
ac913e5c UH |
244 | } |
245 | if (info->is_diode) { | |
b02bb45f UH |
246 | analog->meaning->mq = SR_MQ_VOLTAGE; |
247 | analog->meaning->unit = SR_UNIT_VOLT; | |
ac913e5c | 248 | } |
7fb4ff02 FS |
249 | if (info->is_power) { |
250 | analog->meaning->mq = SR_MQ_POWER; | |
251 | if (info->is_decibel_mw) | |
252 | analog->meaning->unit = SR_UNIT_DECIBEL_MW; | |
253 | else if (info->is_watt) | |
254 | analog->meaning->unit = SR_UNIT_WATT; | |
255 | else | |
256 | analog->meaning->unit = SR_UNIT_UNITLESS; | |
257 | } | |
fd8dc1db FS |
258 | if (info->is_power_factor) { |
259 | analog->meaning->mq = SR_MQ_POWER_FACTOR; | |
260 | analog->meaning->unit = SR_UNIT_UNITLESS; | |
261 | } | |
9871215c | 262 | if (info->is_gain) { |
b02bb45f UH |
263 | analog->meaning->mq = SR_MQ_GAIN; |
264 | analog->meaning->unit = SR_UNIT_DECIBEL_VOLT; | |
9871215c UH |
265 | } |
266 | if (info->is_hfe) { | |
b02bb45f UH |
267 | analog->meaning->mq = SR_MQ_GAIN; |
268 | analog->meaning->unit = SR_UNIT_UNITLESS; | |
9871215c | 269 | } |
e83437ae | 270 | if (info->is_logic) { |
b02bb45f UH |
271 | analog->meaning->mq = SR_MQ_GAIN; |
272 | analog->meaning->unit = SR_UNIT_UNITLESS; | |
e83437ae | 273 | } |
ac913e5c UH |
274 | |
275 | /* Measurement related flags */ | |
276 | if (info->is_ac) | |
b02bb45f | 277 | analog->meaning->mqflags |= SR_MQFLAG_AC; |
ac913e5c | 278 | if (info->is_dc) |
b02bb45f | 279 | analog->meaning->mqflags |= SR_MQFLAG_DC; |
a6ed50f4 | 280 | if (info->is_diode) |
64aa214a | 281 | analog->meaning->mqflags |= SR_MQFLAG_DIODE | SR_MQFLAG_DC; |
7fb4ff02 FS |
282 | if (info->is_min) |
283 | analog->meaning->mqflags |= SR_MQFLAG_MIN; | |
284 | if (info->is_max) | |
285 | analog->meaning->mqflags |= SR_MQFLAG_MAX; | |
286 | if (info->is_avg) | |
287 | analog->meaning->mqflags |= SR_MQFLAG_AVG; | |
ac913e5c UH |
288 | } |
289 | ||
290 | static gboolean flags_valid(const struct metex14_info *info) | |
291 | { | |
292 | int count; | |
293 | ||
294 | /* Does the packet have more than one multiplier? */ | |
295 | count = 0; | |
c02dc3e2 | 296 | count += (info->is_pico) ? 1 : 0; |
ac913e5c UH |
297 | count += (info->is_nano) ? 1 : 0; |
298 | count += (info->is_micro) ? 1 : 0; | |
299 | count += (info->is_milli) ? 1 : 0; | |
300 | count += (info->is_kilo) ? 1 : 0; | |
301 | count += (info->is_mega) ? 1 : 0; | |
302 | if (count > 1) { | |
ec5186f9 | 303 | sr_dbg("More than one multiplier detected in packet."); |
ac913e5c UH |
304 | return FALSE; |
305 | } | |
306 | ||
307 | /* Does the packet "measure" more than one type of value? */ | |
308 | count = 0; | |
309 | count += (info->is_ac) ? 1 : 0; | |
310 | count += (info->is_dc) ? 1 : 0; | |
311 | count += (info->is_resistance) ? 1 : 0; | |
312 | count += (info->is_capacity) ? 1 : 0; | |
313 | count += (info->is_temperature) ? 1 : 0; | |
314 | count += (info->is_diode) ? 1 : 0; | |
315 | count += (info->is_frequency) ? 1 : 0; | |
316 | if (count > 1) { | |
ec5186f9 | 317 | sr_dbg("More than one measurement type detected in packet."); |
ac913e5c UH |
318 | return FALSE; |
319 | } | |
320 | ||
321 | /* Both AC and DC set? */ | |
322 | if (info->is_ac && info->is_dc) { | |
ec5186f9 | 323 | sr_dbg("Both AC and DC flags detected in packet."); |
ac913e5c UH |
324 | return FALSE; |
325 | } | |
326 | ||
327 | return TRUE; | |
328 | } | |
329 | ||
1df81f4b | 330 | #ifdef HAVE_SERIAL_COMM |
e90cf076 UH |
331 | SR_PRIV int sr_metex14_packet_request(struct sr_serial_dev_inst *serial) |
332 | { | |
333 | const uint8_t wbuf = 'D'; | |
d7838e48 GS |
334 | size_t wrlen; |
335 | int ret; | |
e90cf076 UH |
336 | |
337 | sr_spew("Requesting DMM packet."); | |
338 | ||
d7838e48 GS |
339 | wrlen = sizeof(wbuf); |
340 | ret = serial_write_blocking(serial, &wbuf, wrlen, 0); | |
341 | if (ret < 0) | |
342 | return ret; | |
343 | if ((size_t)ret != wrlen) | |
344 | return SR_ERR_IO; | |
345 | ||
346 | return SR_OK; | |
e90cf076 | 347 | } |
c4f2dfd0 | 348 | #endif |
e90cf076 | 349 | |
ac913e5c UH |
350 | SR_PRIV gboolean sr_metex14_packet_valid(const uint8_t *buf) |
351 | { | |
352 | struct metex14_info info; | |
353 | ||
354 | memset(&info, 0x00, sizeof(struct metex14_info)); | |
355 | parse_flags((const char *)buf, &info); | |
356 | ||
357 | if (!flags_valid(&info)) | |
358 | return FALSE; | |
359 | ||
360 | if (buf[13] != '\r') | |
361 | return FALSE; | |
362 | ||
363 | return TRUE; | |
364 | } | |
365 | ||
556a926d GS |
366 | SR_PRIV gboolean sr_metex14_4packets_valid(const uint8_t *buf) |
367 | { | |
368 | struct metex14_info info; | |
369 | size_t ch_idx; | |
370 | const uint8_t *ch_buf; | |
371 | ||
372 | ch_buf = buf; | |
373 | for (ch_idx = 0; ch_idx < 4; ch_idx++) { | |
374 | if (ch_buf[13] != '\r') | |
375 | return FALSE; | |
376 | memset(&info, 0x00, sizeof(info)); | |
377 | parse_flags((const char *)ch_buf, &info); | |
378 | if (!flags_valid(&info)) | |
379 | return FALSE; | |
380 | ch_buf += METEX14_PACKET_SIZE; | |
381 | } | |
382 | return TRUE; | |
383 | } | |
384 | ||
ac913e5c UH |
385 | /** |
386 | * Parse a protocol packet. | |
387 | * | |
1fbab466 | 388 | * @param buf Buffer containing the protocol packet. Must not be NULL. |
ac913e5c | 389 | * @param floatval Pointer to a float variable. That variable will be modified |
1fbab466 | 390 | * in-place depending on the protocol packet. Must not be NULL. |
b02bb45f | 391 | * @param analog Pointer to a struct sr_datafeed_analog. The struct will be |
ac913e5c | 392 | * filled with data according to the protocol packet. |
1fbab466 UH |
393 | * Must not be NULL. |
394 | * @param info Pointer to a struct metex14_info. The struct will be filled | |
395 | * with data according to the protocol packet. Must not be NULL. | |
ac913e5c UH |
396 | * |
397 | * @return SR_OK upon success, SR_ERR upon failure. Upon errors, the | |
398 | * 'analog' variable contents are undefined and should not be used. | |
399 | */ | |
400 | SR_PRIV int sr_metex14_parse(const uint8_t *buf, float *floatval, | |
b02bb45f | 401 | struct sr_datafeed_analog *analog, void *info) |
ac913e5c | 402 | { |
e677490e | 403 | int ret, exponent = 0; |
1fbab466 UH |
404 | struct metex14_info *info_local; |
405 | ||
94b1d506 | 406 | info_local = info; |
ac913e5c | 407 | |
e82d7dbc AG |
408 | /* Don't print byte 13. That one contains the carriage return. */ |
409 | sr_dbg("DMM packet: \"%.13s\"", buf); | |
410 | ||
e83437ae MH |
411 | memset(info_local, 0x00, sizeof(struct metex14_info)); |
412 | ||
e677490e | 413 | if ((ret = parse_value(buf, info_local, floatval, &exponent)) != SR_OK) { |
ec5186f9 | 414 | sr_dbg("Error parsing value: %d.", ret); |
ac913e5c UH |
415 | return ret; |
416 | } | |
417 | ||
1fbab466 | 418 | parse_flags((const char *)buf, info_local); |
e677490e AJ |
419 | handle_flags(analog, floatval, &exponent, info_local); |
420 | ||
d9251a2c | 421 | analog->encoding->digits = -exponent; |
e677490e | 422 | analog->spec->spec_digits = -exponent; |
ac913e5c UH |
423 | |
424 | return SR_OK; | |
425 | } | |
556a926d GS |
426 | |
427 | /** | |
428 | * Parse one out of four values of a four-display Metex14 variant. | |
429 | * | |
430 | * The caller's 'info' parameter can be used to track the channel index, | |
431 | * as long as the information is kept across calls to the 14-byte packet | |
432 | * parse routine (which clears the 'info' container). | |
433 | * | |
434 | * Since analog values have further details in the 'analog' parameter, | |
435 | * passing multiple values per parse routine call is problematic. So we | |
436 | * prefer the approach of passing one value per call, which is most | |
437 | * reliable and shall fit every similar device with multiple displays. | |
438 | * | |
439 | * The meters which use this parse routine send one 14-byte packet per | |
440 | * display. Each packet has the regular Metex14 layout. | |
441 | */ | |
442 | SR_PRIV int sr_metex14_4packets_parse(const uint8_t *buf, float *floatval, | |
443 | struct sr_datafeed_analog *analog, void *info) | |
444 | { | |
445 | struct metex14_info *info_local; | |
446 | size_t ch_idx; | |
447 | const uint8_t *ch_buf; | |
448 | int rc; | |
449 | ||
450 | info_local = info; | |
451 | ch_idx = info_local->ch_idx; | |
452 | ch_buf = buf + ch_idx * METEX14_PACKET_SIZE; | |
453 | rc = sr_metex14_parse(ch_buf, floatval, analog, info); | |
454 | info_local->ch_idx = ch_idx + 1; | |
455 | return rc; | |
456 | } |