libsigrok  0.5.0
sigrok hardware access and backend library
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hwdriver.c
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1 /*
2  * This file is part of the libsigrok project.
3  *
4  * Copyright (C) 2013 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 <stdio.h>
23 #include <sys/types.h>
24 #include <dirent.h>
25 #include <string.h>
26 #include <glib.h>
27 #include <libsigrok/libsigrok.h>
28 #include "libsigrok-internal.h"
29 
30 /** @cond PRIVATE */
31 #define LOG_PREFIX "hwdriver"
32 /** @endcond */
33 
34 /**
35  * @file
36  *
37  * Hardware driver handling in libsigrok.
38  */
39 
40 /**
41  * @defgroup grp_driver Hardware drivers
42  *
43  * Hardware driver handling in libsigrok.
44  *
45  * @{
46  */
47 
48 /* Please use the same order/grouping as in enum sr_configkey (libsigrok.h). */
49 static struct sr_key_info sr_key_info_config[] = {
50  /* Device classes */
51  {SR_CONF_LOGIC_ANALYZER, SR_T_STRING, NULL, "Logic analyzer", NULL},
52  {SR_CONF_OSCILLOSCOPE, SR_T_STRING, NULL, "Oscilloscope", NULL},
53  {SR_CONF_MULTIMETER, SR_T_STRING, NULL, "Multimeter", NULL},
54  {SR_CONF_DEMO_DEV, SR_T_STRING, NULL, "Demo device", NULL},
55  {SR_CONF_SOUNDLEVELMETER, SR_T_STRING, NULL, "Sound level meter", NULL},
56  {SR_CONF_THERMOMETER, SR_T_STRING, NULL, "Thermometer", NULL},
57  {SR_CONF_HYGROMETER, SR_T_STRING, NULL, "Hygrometer", NULL},
58  {SR_CONF_ENERGYMETER, SR_T_STRING, NULL, "Energy meter", NULL},
59  {SR_CONF_DEMODULATOR, SR_T_STRING, NULL, "Demodulator", NULL},
60  {SR_CONF_POWER_SUPPLY, SR_T_STRING, NULL, "Power supply", NULL},
61  {SR_CONF_LCRMETER, SR_T_STRING, NULL, "LCR meter", NULL},
62  {SR_CONF_ELECTRONIC_LOAD, SR_T_STRING, NULL, "Electronic load", NULL},
63  {SR_CONF_SCALE, SR_T_STRING, NULL, "Scale", NULL},
64  {SR_CONF_SIGNAL_GENERATOR, SR_T_STRING, NULL, "Signal generator", NULL},
65 
66  /* Driver scan options */
67  {SR_CONF_CONN, SR_T_STRING, "conn",
68  "Connection", NULL},
69  {SR_CONF_SERIALCOMM, SR_T_STRING, "serialcomm",
70  "Serial communication", NULL},
71  {SR_CONF_MODBUSADDR, SR_T_UINT64, "modbusaddr",
72  "Modbus slave address", NULL},
73 
74  /* Device (or channel group) configuration */
75  {SR_CONF_SAMPLERATE, SR_T_UINT64, "samplerate",
76  "Sample rate", NULL},
77  {SR_CONF_CAPTURE_RATIO, SR_T_UINT64, "captureratio",
78  "Pre-trigger capture ratio", NULL},
79  {SR_CONF_PATTERN_MODE, SR_T_STRING, "pattern",
80  "Pattern", NULL},
81  {SR_CONF_RLE, SR_T_BOOL, "rle",
82  "Run length encoding", NULL},
83  {SR_CONF_TRIGGER_SLOPE, SR_T_STRING, "triggerslope",
84  "Trigger slope", NULL},
85  {SR_CONF_AVERAGING, SR_T_BOOL, "averaging",
86  "Averaging", NULL},
87  {SR_CONF_AVG_SAMPLES, SR_T_UINT64, "avg_samples",
88  "Number of samples to average over", NULL},
89  {SR_CONF_TRIGGER_SOURCE, SR_T_STRING, "triggersource",
90  "Trigger source", NULL},
91  {SR_CONF_HORIZ_TRIGGERPOS, SR_T_FLOAT, "horiz_triggerpos",
92  "Horizontal trigger position", NULL},
93  {SR_CONF_BUFFERSIZE, SR_T_UINT64, "buffersize",
94  "Buffer size", NULL},
96  "Time base", NULL},
97  {SR_CONF_FILTER, SR_T_BOOL, "filter",
98  "Filter", NULL},
100  "Volts/div", NULL},
101  {SR_CONF_COUPLING, SR_T_STRING, "coupling",
102  "Coupling", NULL},
103  {SR_CONF_TRIGGER_MATCH, SR_T_INT32, "triggermatch",
104  "Trigger matches", NULL},
105  {SR_CONF_SAMPLE_INTERVAL, SR_T_UINT64, "sample_interval",
106  "Sample interval", NULL},
107  {SR_CONF_NUM_HDIV, SR_T_INT32, "num_hdiv",
108  "Number of horizontal divisions", NULL},
109  {SR_CONF_NUM_VDIV, SR_T_INT32, "num_vdiv",
110  "Number of vertical divisions", NULL},
111  {SR_CONF_SPL_WEIGHT_FREQ, SR_T_STRING, "spl_weight_freq",
112  "Sound pressure level frequency weighting", NULL},
113  {SR_CONF_SPL_WEIGHT_TIME, SR_T_STRING, "spl_weight_time",
114  "Sound pressure level time weighting", NULL},
116  "Sound pressure level measurement range", NULL},
117  {SR_CONF_HOLD_MAX, SR_T_BOOL, "hold_max",
118  "Hold max", NULL},
119  {SR_CONF_HOLD_MIN, SR_T_BOOL, "hold_min",
120  "Hold min", NULL},
121  {SR_CONF_VOLTAGE_THRESHOLD, SR_T_DOUBLE_RANGE, "voltage_threshold",
122  "Voltage threshold", NULL },
123  {SR_CONF_EXTERNAL_CLOCK, SR_T_BOOL, "external_clock",
124  "External clock mode", NULL},
125  {SR_CONF_SWAP, SR_T_BOOL, "swap",
126  "Swap channel order", NULL},
127  {SR_CONF_CENTER_FREQUENCY, SR_T_UINT64, "center_frequency",
128  "Center frequency", NULL},
129  {SR_CONF_NUM_LOGIC_CHANNELS, SR_T_INT32, "logic_channels",
130  "Number of logic channels", NULL},
131  {SR_CONF_NUM_ANALOG_CHANNELS, SR_T_INT32, "analog_channels",
132  "Number of analog channels", NULL},
133  {SR_CONF_VOLTAGE, SR_T_FLOAT, "voltage",
134  "Current voltage", NULL},
135  {SR_CONF_VOLTAGE_TARGET, SR_T_FLOAT, "voltage_target",
136  "Voltage target", NULL},
137  {SR_CONF_CURRENT, SR_T_FLOAT, "current",
138  "Current current", NULL},
139  {SR_CONF_CURRENT_LIMIT, SR_T_FLOAT, "current_limit",
140  "Current limit", NULL},
141  {SR_CONF_ENABLED, SR_T_BOOL, "enabled",
142  "Channel enabled", NULL},
143  {SR_CONF_CHANNEL_CONFIG, SR_T_STRING, "channel_config",
144  "Channel modes", NULL},
146  "Over-voltage protection enabled", NULL},
148  "Over-voltage protection active", NULL},
150  "Over-voltage protection threshold", NULL},
152  "Over-current protection enabled", NULL},
154  "Over-current protection active", NULL},
156  "Over-current protection threshold", NULL},
157  {SR_CONF_CLOCK_EDGE, SR_T_STRING, "clock_edge",
158  "Clock edge", NULL},
159  {SR_CONF_AMPLITUDE, SR_T_FLOAT, "amplitude",
160  "Amplitude", NULL},
161  {SR_CONF_REGULATION, SR_T_STRING, "regulation",
162  "Channel regulation", NULL},
164  "Over-temperature protection", NULL},
165  {SR_CONF_OUTPUT_FREQUENCY, SR_T_FLOAT, "output_frequency",
166  "Output frequency", NULL},
167  {SR_CONF_OUTPUT_FREQUENCY_TARGET, SR_T_FLOAT, "output_frequency_target",
168  "Output frequency target", NULL},
169  {SR_CONF_MEASURED_QUANTITY, SR_T_MQ, "measured_quantity",
170  "Measured quantity", NULL},
171  {SR_CONF_EQUIV_CIRCUIT_MODEL, SR_T_STRING, "equiv_circuit_model",
172  "Equivalent circuit model", NULL},
174  "Over-temperature protection active", NULL},
176  "Under-voltage condition", NULL},
178  "Under-voltage condition active", NULL},
179  {SR_CONF_TRIGGER_LEVEL, SR_T_FLOAT, "triggerlevel",
180  "Trigger level", NULL},
181 
182  /* Special stuff */
183  {SR_CONF_SESSIONFILE, SR_T_STRING, "sessionfile",
184  "Session file", NULL},
185  {SR_CONF_CAPTUREFILE, SR_T_STRING, "capturefile",
186  "Capture file", NULL},
187  {SR_CONF_CAPTURE_UNITSIZE, SR_T_UINT64, "capture_unitsize",
188  "Capture unitsize", NULL},
189  {SR_CONF_POWER_OFF, SR_T_BOOL, "power_off",
190  "Power off", NULL},
191  {SR_CONF_DATA_SOURCE, SR_T_STRING, "data_source",
192  "Data source", NULL},
193  {SR_CONF_PROBE_FACTOR, SR_T_UINT64, "probe_factor",
194  "Probe factor", NULL},
196  "Number of ADC powerline cycles", NULL},
197 
198  /* Acquisition modes, sample limiting */
199  {SR_CONF_LIMIT_MSEC, SR_T_UINT64, "limit_time",
200  "Time limit", NULL},
201  {SR_CONF_LIMIT_SAMPLES, SR_T_UINT64, "limit_samples",
202  "Sample limit", NULL},
203  {SR_CONF_LIMIT_FRAMES, SR_T_UINT64, "limit_frames",
204  "Frame limit", NULL},
205  {SR_CONF_CONTINUOUS, SR_T_BOOL, "continuous",
206  "Continuous sampling", NULL},
207  {SR_CONF_DATALOG, SR_T_BOOL, "datalog",
208  "Datalog", NULL},
209  {SR_CONF_DEVICE_MODE, SR_T_STRING, "device_mode",
210  "Device mode", NULL},
211  {SR_CONF_TEST_MODE, SR_T_STRING, "test_mode",
212  "Test mode", NULL},
213 
214  ALL_ZERO
215 };
216 
217 /* Please use the same order as in enum sr_mq (libsigrok.h). */
218 static struct sr_key_info sr_key_info_mq[] = {
219  {SR_MQ_VOLTAGE, 0, "voltage", "Voltage", NULL},
220  {SR_MQ_CURRENT, 0, "current", "Current", NULL},
221  {SR_MQ_RESISTANCE, 0, "resistance", "Resistance", NULL},
222  {SR_MQ_CAPACITANCE, 0, "capacitance", "Capacitance", NULL},
223  {SR_MQ_TEMPERATURE, 0, "temperature", "Temperature", NULL},
224  {SR_MQ_FREQUENCY, 0, "frequency", "Frequency", NULL},
225  {SR_MQ_DUTY_CYCLE, 0, "duty_cycle", "Duty cycle", NULL},
226  {SR_MQ_CONTINUITY, 0, "continuity", "Continuity", NULL},
227  {SR_MQ_PULSE_WIDTH, 0, "pulse_width", "Pulse width", NULL},
228  {SR_MQ_CONDUCTANCE, 0, "conductance", "Conductance", NULL},
229  {SR_MQ_POWER, 0, "power", "Power", NULL},
230  {SR_MQ_GAIN, 0, "gain", "Gain", NULL},
231  {SR_MQ_SOUND_PRESSURE_LEVEL, 0, "spl", "Sound pressure level", NULL},
232  {SR_MQ_CARBON_MONOXIDE, 0, "co", "Carbon monoxide", NULL},
233  {SR_MQ_RELATIVE_HUMIDITY, 0, "rh", "Relative humidity", NULL},
234  {SR_MQ_TIME, 0, "time", "Time", NULL},
235  {SR_MQ_WIND_SPEED, 0, "wind_speed", "Wind speed", NULL},
236  {SR_MQ_PRESSURE, 0, "pressure", "Pressure", NULL},
237  {SR_MQ_PARALLEL_INDUCTANCE, 0, "parallel_inductance", "Parallel inductance", NULL},
238  {SR_MQ_PARALLEL_CAPACITANCE, 0, "parallel_capacitance", "Parallel capacitance", NULL},
239  {SR_MQ_PARALLEL_RESISTANCE, 0, "parallel_resistance", "Parallel resistance", NULL},
240  {SR_MQ_SERIES_INDUCTANCE, 0, "series_inductance", "Series inductance", NULL},
241  {SR_MQ_SERIES_CAPACITANCE, 0, "series_capacitance", "Series capacitance", NULL},
242  {SR_MQ_SERIES_RESISTANCE, 0, "series_resistance", "Series resistance", NULL},
243  {SR_MQ_DISSIPATION_FACTOR, 0, "dissipation_factor", "Dissipation factor", NULL},
244  {SR_MQ_QUALITY_FACTOR, 0, "quality_factor", "Quality factor", NULL},
245  {SR_MQ_PHASE_ANGLE, 0, "phase_angle", "Phase angle", NULL},
246  {SR_MQ_DIFFERENCE, 0, "difference", "Difference", NULL},
247  {SR_MQ_COUNT, 0, "count", "Count", NULL},
248  {SR_MQ_POWER_FACTOR, 0, "power_factor", "Power factor", NULL},
249  {SR_MQ_APPARENT_POWER, 0, "apparent_power", "Apparent power", NULL},
250  {SR_MQ_MASS, 0, "mass", "Mass", NULL},
251  {SR_MQ_HARMONIC_RATIO, 0, "harmonic_ratio", "Harmonic ratio", NULL},
252  ALL_ZERO
253 };
254 
255 /* Please use the same order as in enum sr_mqflag (libsigrok.h). */
256 static struct sr_key_info sr_key_info_mqflag[] = {
257  {SR_MQFLAG_AC, 0, "ac", "AC", NULL},
258  {SR_MQFLAG_DC, 0, "dc", "DC", NULL},
259  {SR_MQFLAG_RMS, 0, "rms", "RMS", NULL},
260  {SR_MQFLAG_DIODE, 0, "diode", "Diode", NULL},
261  {SR_MQFLAG_HOLD, 0, "hold", "Hold", NULL},
262  {SR_MQFLAG_MAX, 0, "max", "Max", NULL},
263  {SR_MQFLAG_MIN, 0, "min", "Min", NULL},
264  {SR_MQFLAG_AUTORANGE, 0, "auto_range", "Auto range", NULL},
265  {SR_MQFLAG_RELATIVE, 0, "relative", "Relative", NULL},
266  {SR_MQFLAG_SPL_FREQ_WEIGHT_A, 0, "spl_freq_weight_a",
267  "Frequency weighted (A)", NULL},
268  {SR_MQFLAG_SPL_FREQ_WEIGHT_C, 0, "spl_freq_weight_c",
269  "Frequency weighted (C)", NULL},
270  {SR_MQFLAG_SPL_FREQ_WEIGHT_Z, 0, "spl_freq_weight_z",
271  "Frequency weighted (Z)", NULL},
272  {SR_MQFLAG_SPL_FREQ_WEIGHT_FLAT, 0, "spl_freq_weight_flat",
273  "Frequency weighted (flat)", NULL},
274  {SR_MQFLAG_SPL_TIME_WEIGHT_S, 0, "spl_time_weight_s",
275  "Time weighted (S)", NULL},
276  {SR_MQFLAG_SPL_TIME_WEIGHT_F, 0, "spl_time_weight_f",
277  "Time weighted (F)", NULL},
278  {SR_MQFLAG_SPL_LAT, 0, "spl_time_average", "Time-averaged (LEQ)", NULL},
279  {SR_MQFLAG_SPL_PCT_OVER_ALARM, 0, "spl_pct_over_alarm",
280  "Percentage over alarm", NULL},
281  {SR_MQFLAG_DURATION, 0, "duration", "Duration", NULL},
282  {SR_MQFLAG_AVG, 0, "average", "Average", NULL},
283  {SR_MQFLAG_REFERENCE, 0, "reference", "Reference", NULL},
284  {SR_MQFLAG_UNSTABLE, 0, "unstable", "Unstable", NULL},
285  {SR_MQFLAG_FOUR_WIRE, 0, "four_wire", "4-Wire", NULL},
286  ALL_ZERO
287 };
288 
289 /* This must handle all the keys from enum sr_datatype (libsigrok.h). */
290 /** @private */
291 SR_PRIV const GVariantType *sr_variant_type_get(int datatype)
292 {
293  switch (datatype) {
294  case SR_T_INT32:
295  return G_VARIANT_TYPE_INT32;
296  case SR_T_UINT64:
297  return G_VARIANT_TYPE_UINT64;
298  case SR_T_STRING:
299  return G_VARIANT_TYPE_STRING;
300  case SR_T_BOOL:
301  return G_VARIANT_TYPE_BOOLEAN;
302  case SR_T_FLOAT:
303  return G_VARIANT_TYPE_DOUBLE;
305  case SR_T_RATIONAL_VOLT:
306  case SR_T_UINT64_RANGE:
307  case SR_T_DOUBLE_RANGE:
308  return G_VARIANT_TYPE_TUPLE;
309  case SR_T_KEYVALUE:
310  return G_VARIANT_TYPE_DICTIONARY;
311  case SR_T_MQ:
312  return G_VARIANT_TYPE_TUPLE;
313  default:
314  return NULL;
315  }
316 }
317 
318 /** @private */
319 SR_PRIV int sr_variant_type_check(uint32_t key, GVariant *value)
320 {
321  const struct sr_key_info *info;
322  const GVariantType *type, *expected;
323  char *expected_string, *type_string;
324 
325  info = sr_key_info_get(SR_KEY_CONFIG, key);
326  if (!info)
327  return SR_OK;
328 
329  expected = sr_variant_type_get(info->datatype);
330  type = g_variant_get_type(value);
331  if (!g_variant_type_equal(type, expected)
332  && !g_variant_type_is_subtype_of(type, expected)) {
333  expected_string = g_variant_type_dup_string(expected);
334  type_string = g_variant_type_dup_string(type);
335  sr_err("Wrong variant type for key '%s': expected '%s', got '%s'",
336  info->name, expected_string, type_string);
337  g_free(expected_string);
338  g_free(type_string);
339  return SR_ERR_ARG;
340  }
341 
342  return SR_OK;
343 }
344 
345 /**
346  * Return the list of supported hardware drivers.
347  *
348  * @param[in] ctx Pointer to a libsigrok context struct. Must not be NULL.
349  *
350  * @retval NULL The ctx argument was NULL, or there are no supported drivers.
351  * @retval Other Pointer to the NULL-terminated list of hardware drivers.
352  * The user should NOT g_free() this list, sr_exit() will do that.
353  *
354  * @since 0.4.0
355  */
356 SR_API struct sr_dev_driver **sr_driver_list(const struct sr_context *ctx)
357 {
358  if (!ctx)
359  return NULL;
360 
361  return ctx->driver_list;
362 }
363 
364 /**
365  * Initialize a hardware driver.
366  *
367  * This usually involves memory allocations and variable initializations
368  * within the driver, but _not_ scanning for attached devices.
369  * The API call sr_driver_scan() is used for that.
370  *
371  * @param ctx A libsigrok context object allocated by a previous call to
372  * sr_init(). Must not be NULL.
373  * @param driver The driver to initialize. This must be a pointer to one of
374  * the entries returned by sr_driver_list(). Must not be NULL.
375  *
376  * @retval SR_OK Success
377  * @retval SR_ERR_ARG Invalid parameter(s).
378  * @retval SR_ERR_BUG Internal errors.
379  * @retval other Another negative error code upon other errors.
380  *
381  * @since 0.2.0
382  */
383 SR_API int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver)
384 {
385  int ret;
386 
387  if (!ctx) {
388  sr_err("Invalid libsigrok context, can't initialize.");
389  return SR_ERR_ARG;
390  }
391 
392  if (!driver) {
393  sr_err("Invalid driver, can't initialize.");
394  return SR_ERR_ARG;
395  }
396 
397  if ((ret = driver->init(driver, ctx)) < 0)
398  sr_err("Failed to initialize the driver: %d.", ret);
399 
400  return ret;
401 }
402 
403 /**
404  * Enumerate scan options supported by this driver.
405  *
406  * Before calling sr_driver_scan_options_list(), the user must have previously
407  * initialized the driver by calling sr_driver_init().
408  *
409  * @param driver The driver to enumerate options for. This must be a pointer
410  * to one of the entries returned by sr_driver_list(). Must not
411  * be NULL.
412  *
413  * @return A GArray * of uint32_t entries, or NULL on invalid arguments. Each
414  * entry is a configuration key that is supported as a scan option.
415  * The array must be freed by the caller using g_array_free().
416  *
417  * @since 0.4.0
418  */
419 SR_API GArray *sr_driver_scan_options_list(const struct sr_dev_driver *driver)
420 {
421  GVariant *gvar;
422  const uint32_t *opts;
423  gsize num_opts;
424  GArray *result;
425 
426  if (sr_config_list(driver, NULL, NULL, SR_CONF_SCAN_OPTIONS, &gvar) != SR_OK)
427  return NULL;
428 
429  opts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(uint32_t));
430 
431  result = g_array_sized_new(FALSE, FALSE, sizeof(uint32_t), num_opts);
432 
433  g_array_insert_vals(result, 0, opts, num_opts);
434 
435  g_variant_unref(gvar);
436 
437  return result;
438 }
439 
440 static int check_options(struct sr_dev_driver *driver, GSList *options,
441  uint32_t optlist_key, struct sr_dev_inst *sdi,
442  struct sr_channel_group *cg)
443 {
444  struct sr_config *src;
445  const struct sr_key_info *srci;
446  GVariant *gvar_opts;
447  GSList *l;
448  const uint32_t *opts;
449  gsize num_opts, i;
450  int ret;
451 
452  if (sr_config_list(driver, sdi, cg, optlist_key, &gvar_opts) != SR_OK) {
453  /* Driver publishes no options for this optlist. */
454  return SR_ERR;
455  }
456 
457  ret = SR_OK;
458  opts = g_variant_get_fixed_array(gvar_opts, &num_opts, sizeof(uint32_t));
459  for (l = options; l; l = l->next) {
460  src = l->data;
461  for (i = 0; i < num_opts; i++) {
462  if (opts[i] == src->key)
463  break;
464  }
465  if (i == num_opts) {
466  if (!(srci = sr_key_info_get(SR_KEY_CONFIG, src->key)))
467  /* Shouldn't happen. */
468  sr_err("Invalid option %d.", src->key);
469  else
470  sr_err("Invalid option '%s'.", srci->id);
471  ret = SR_ERR_ARG;
472  break;
473  }
474  if (sr_variant_type_check(src->key, src->data) != SR_OK) {
475  ret = SR_ERR_ARG;
476  break;
477  }
478  }
479  g_variant_unref(gvar_opts);
480 
481  return ret;
482 }
483 
484 /**
485  * Tell a hardware driver to scan for devices.
486  *
487  * In addition to the detection, the devices that are found are also
488  * initialized automatically. On some devices, this involves a firmware upload,
489  * or other such measures.
490  *
491  * The order in which the system is scanned for devices is not specified. The
492  * caller should not assume or rely on any specific order.
493  *
494  * Before calling sr_driver_scan(), the user must have previously initialized
495  * the driver by calling sr_driver_init().
496  *
497  * @param driver The driver that should scan. This must be a pointer to one of
498  * the entries returned by sr_driver_list(). Must not be NULL.
499  * @param options A list of 'struct sr_hwopt' options to pass to the driver's
500  * scanner. Can be NULL/empty.
501  *
502  * @return A GSList * of 'struct sr_dev_inst', or NULL if no devices were
503  * found (or errors were encountered). This list must be freed by the
504  * caller using g_slist_free(), but without freeing the data pointed
505  * to in the list.
506  *
507  * @since 0.2.0
508  */
509 SR_API GSList *sr_driver_scan(struct sr_dev_driver *driver, GSList *options)
510 {
511  GSList *l;
512 
513  if (!driver) {
514  sr_err("Invalid driver, can't scan for devices.");
515  return NULL;
516  }
517 
518  if (!driver->context) {
519  sr_err("Driver not initialized, can't scan for devices.");
520  return NULL;
521  }
522 
523  if (options) {
524  if (check_options(driver, options, SR_CONF_SCAN_OPTIONS, NULL, NULL) != SR_OK)
525  return NULL;
526  }
527 
528  l = driver->scan(driver, options);
529 
530  sr_spew("Scan of '%s' found %d devices.", driver->name,
531  g_slist_length(l));
532 
533  return l;
534 }
535 
536 /**
537  * Call driver cleanup function for all drivers.
538  *
539  * @param[in] ctx Pointer to a libsigrok context struct. Must not be NULL.
540  *
541  * @private
542  */
543 SR_PRIV void sr_hw_cleanup_all(const struct sr_context *ctx)
544 {
545  int i;
546  struct sr_dev_driver **drivers;
547 
548  if (!ctx)
549  return;
550 
551  drivers = sr_driver_list(ctx);
552  for (i = 0; drivers[i]; i++) {
553  if (drivers[i]->cleanup)
554  drivers[i]->cleanup(drivers[i]);
555  drivers[i]->context = NULL;
556  }
557 }
558 
559 /**
560  * Allocate struct sr_config.
561  *
562  * A floating reference can be passed in for data.
563  *
564  * @private
565  */
566 SR_PRIV struct sr_config *sr_config_new(uint32_t key, GVariant *data)
567 {
568  struct sr_config *src;
569 
570  src = g_malloc0(sizeof(struct sr_config));
571  src->key = key;
572  src->data = g_variant_ref_sink(data);
573 
574  return src;
575 }
576 
577 /**
578  * Free struct sr_config.
579  *
580  * @private
581  */
582 SR_PRIV void sr_config_free(struct sr_config *src)
583 {
584 
585  if (!src || !src->data) {
586  sr_err("%s: invalid data!", __func__);
587  return;
588  }
589 
590  g_variant_unref(src->data);
591  g_free(src);
592 
593 }
594 
595 static void log_key(const struct sr_dev_inst *sdi,
596  const struct sr_channel_group *cg, uint32_t key, int op, GVariant *data)
597 {
598  const char *opstr;
599  const struct sr_key_info *srci;
600  gchar *tmp_str;
601 
602  /* Don't log SR_CONF_DEVICE_OPTIONS, it's verbose and not too useful. */
603  if (key == SR_CONF_DEVICE_OPTIONS)
604  return;
605 
606  opstr = op == SR_CONF_GET ? "get" : op == SR_CONF_SET ? "set" : "list";
607  srci = sr_key_info_get(SR_KEY_CONFIG, key);
608 
609  tmp_str = g_variant_print(data, TRUE);
610  sr_spew("sr_config_%s(): key %d (%s) sdi %p cg %s -> %s", opstr, key,
611  srci ? srci->id : "NULL", sdi, cg ? cg->name : "NULL",
612  data ? tmp_str : "NULL");
613  g_free(tmp_str);
614 }
615 
616 static int check_key(const struct sr_dev_driver *driver,
617  const struct sr_dev_inst *sdi, const struct sr_channel_group *cg,
618  uint32_t key, int op, GVariant *data)
619 {
620  const struct sr_key_info *srci;
621  gsize num_opts, i;
622  GVariant *gvar_opts;
623  const uint32_t *opts;
624  uint32_t pub_opt;
625  const char *suffix;
626  const char *opstr;
627 
628  if (sdi && cg)
629  suffix = " for this device and channel group";
630  else if (sdi)
631  suffix = " for this device";
632  else
633  suffix = "";
634 
635  if (!(srci = sr_key_info_get(SR_KEY_CONFIG, key))) {
636  sr_err("Invalid key %d.", key);
637  return SR_ERR_ARG;
638  }
639  opstr = op == SR_CONF_GET ? "get" : op == SR_CONF_SET ? "set" : "list";
640 
641  switch (key) {
642  case SR_CONF_LIMIT_MSEC:
644  case SR_CONF_SAMPLERATE:
645  /* Setting any of these to 0 is not useful. */
646  if (op != SR_CONF_SET || !data)
647  break;
648  if (g_variant_get_uint64(data) == 0) {
649  sr_err("Cannot set '%s' to 0.", srci->id);
650  return SR_ERR_ARG;
651  }
652  break;
653  }
654 
655  if (sr_config_list(driver, sdi, cg, SR_CONF_DEVICE_OPTIONS, &gvar_opts) != SR_OK) {
656  /* Driver publishes no options. */
657  sr_err("No options available%s.", suffix);
658  return SR_ERR_ARG;
659  }
660  opts = g_variant_get_fixed_array(gvar_opts, &num_opts, sizeof(uint32_t));
661  pub_opt = 0;
662  for (i = 0; i < num_opts; i++) {
663  if ((opts[i] & SR_CONF_MASK) == key) {
664  pub_opt = opts[i];
665  break;
666  }
667  }
668  g_variant_unref(gvar_opts);
669  if (!pub_opt) {
670  sr_err("Option '%s' not available%s.", srci->id, suffix);
671  return SR_ERR_ARG;
672  }
673 
674  if (!(pub_opt & op)) {
675  sr_err("Option '%s' not available to %s%s.", srci->id, opstr, suffix);
676  return SR_ERR_ARG;
677  }
678 
679  return SR_OK;
680 }
681 
682 /**
683  * Query value of a configuration key at the given driver or device instance.
684  *
685  * @param[in] driver The sr_dev_driver struct to query. Must not be NULL.
686  * @param[in] sdi (optional) If the key is specific to a device, this must
687  * contain a pointer to the struct sr_dev_inst to be checked.
688  * Otherwise it must be NULL. If sdi is != NULL, sdi->priv must
689  * also be != NULL.
690  * @param[in] cg The channel group on the device for which to list the
691  * values, or NULL.
692  * @param[in] key The configuration key (SR_CONF_*).
693  * @param[in,out] data Pointer to a GVariant where the value will be stored.
694  * Must not be NULL. The caller is given ownership of the GVariant
695  * and must thus decrease the refcount after use. However if
696  * this function returns an error code, the field should be
697  * considered unused, and should not be unreferenced.
698  *
699  * @retval SR_OK Success.
700  * @retval SR_ERR Error.
701  * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be
702  * interpreted as an error by the caller; merely as an indication
703  * that it's not applicable.
704  *
705  * @since 0.3.0
706  */
707 SR_API int sr_config_get(const struct sr_dev_driver *driver,
708  const struct sr_dev_inst *sdi,
709  const struct sr_channel_group *cg,
710  uint32_t key, GVariant **data)
711 {
712  int ret;
713 
714  if (!driver || !data)
715  return SR_ERR;
716 
717  if (!driver->config_get)
718  return SR_ERR_ARG;
719 
720  if (check_key(driver, sdi, cg, key, SR_CONF_GET, NULL) != SR_OK)
721  return SR_ERR_ARG;
722 
723  if (sdi && !sdi->priv) {
724  sr_err("Can't get config (sdi != NULL, sdi->priv == NULL).");
725  return SR_ERR;
726  }
727 
728  if ((ret = driver->config_get(key, data, sdi, cg)) == SR_OK) {
729  log_key(sdi, cg, key, SR_CONF_GET, *data);
730  /* Got a floating reference from the driver. Sink it here,
731  * caller will need to unref when done with it. */
732  g_variant_ref_sink(*data);
733  }
734 
735  return ret;
736 }
737 
738 /**
739  * Set value of a configuration key in a device instance.
740  *
741  * @param[in] sdi The device instance. Must not be NULL. sdi->driver and
742  * sdi->priv must not be NULL either.
743  * @param[in] cg The channel group on the device for which to list the
744  * values, or NULL.
745  * @param[in] key The configuration key (SR_CONF_*).
746  * @param data The new value for the key, as a GVariant with GVariantType
747  * appropriate to that key. A floating reference can be passed
748  * in; its refcount will be sunk and unreferenced after use.
749  *
750  * @retval SR_OK Success.
751  * @retval SR_ERR Error.
752  * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be
753  * interpreted as an error by the caller; merely as an indication
754  * that it's not applicable.
755  *
756  * @since 0.3.0
757  */
758 SR_API int sr_config_set(const struct sr_dev_inst *sdi,
759  const struct sr_channel_group *cg,
760  uint32_t key, GVariant *data)
761 {
762  int ret;
763 
764  g_variant_ref_sink(data);
765 
766  if (!sdi || !sdi->driver || !sdi->priv || !data)
767  ret = SR_ERR;
768  else if (!sdi->driver->config_set)
769  ret = SR_ERR_ARG;
770  else if (check_key(sdi->driver, sdi, cg, key, SR_CONF_SET, data) != SR_OK)
771  return SR_ERR_ARG;
772  else if ((ret = sr_variant_type_check(key, data)) == SR_OK) {
773  log_key(sdi, cg, key, SR_CONF_SET, data);
774  ret = sdi->driver->config_set(key, data, sdi, cg);
775  }
776 
777  g_variant_unref(data);
778 
779  return ret;
780 }
781 
782 /**
783  * Apply configuration settings to the device hardware.
784  *
785  * @param sdi The device instance.
786  *
787  * @return SR_OK upon success or SR_ERR in case of error.
788  *
789  * @since 0.3.0
790  */
791 SR_API int sr_config_commit(const struct sr_dev_inst *sdi)
792 {
793  int ret;
794 
795  if (!sdi || !sdi->driver)
796  ret = SR_ERR;
797  else if (!sdi->driver->config_commit)
798  ret = SR_OK;
799  else
800  ret = sdi->driver->config_commit(sdi);
801 
802  return ret;
803 }
804 
805 /**
806  * List all possible values for a configuration key.
807  *
808  * @param[in] driver The sr_dev_driver struct to query. Must not be NULL.
809  * @param[in] sdi (optional) If the key is specific to a device, this must
810  * contain a pointer to the struct sr_dev_inst to be checked.
811  * Otherwise it must be NULL. If sdi is != NULL, sdi->priv must
812  * also be != NULL.
813  * @param[in] cg The channel group on the device for which to list the
814  * values, or NULL.
815  * @param[in] key The configuration key (SR_CONF_*).
816  * @param[in,out] data A pointer to a GVariant where the list will be stored.
817  * The caller is given ownership of the GVariant and must thus
818  * unref the GVariant after use. However if this function
819  * returns an error code, the field should be considered
820  * unused, and should not be unreferenced.
821  *
822  * @retval SR_OK Success.
823  * @retval SR_ERR Error.
824  * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be
825  * interpreted as an error by the caller; merely as an indication
826  * that it's not applicable.
827  *
828  * @since 0.3.0
829  */
830 SR_API int sr_config_list(const struct sr_dev_driver *driver,
831  const struct sr_dev_inst *sdi,
832  const struct sr_channel_group *cg,
833  uint32_t key, GVariant **data)
834 {
835  int ret;
836 
837  if (!driver || !data)
838  return SR_ERR;
839  else if (!driver->config_list)
840  return SR_ERR_ARG;
841  else if (key != SR_CONF_SCAN_OPTIONS && key != SR_CONF_DEVICE_OPTIONS) {
842  if (check_key(driver, sdi, cg, key, SR_CONF_LIST, NULL) != SR_OK)
843  return SR_ERR_ARG;
844  }
845  if (sdi && !sdi->priv) {
846  sr_err("Can't list config (sdi != NULL, sdi->priv == NULL).");
847  return SR_ERR;
848  }
849  if ((ret = driver->config_list(key, data, sdi, cg)) == SR_OK) {
850  log_key(sdi, cg, key, SR_CONF_LIST, *data);
851  g_variant_ref_sink(*data);
852  }
853 
854  return ret;
855 }
856 
857 static struct sr_key_info *get_keytable(int keytype)
858 {
859  struct sr_key_info *table;
860 
861  switch (keytype) {
862  case SR_KEY_CONFIG:
863  table = sr_key_info_config;
864  break;
865  case SR_KEY_MQ:
866  table = sr_key_info_mq;
867  break;
868  case SR_KEY_MQFLAGS:
869  table = sr_key_info_mqflag;
870  break;
871  default:
872  sr_err("Invalid keytype %d", keytype);
873  return NULL;
874  }
875 
876  return table;
877 }
878 
879 /**
880  * Get information about a key, by key.
881  *
882  * @param[in] keytype The namespace the key is in.
883  * @param[in] key The key to find.
884  *
885  * @return A pointer to a struct sr_key_info, or NULL if the key
886  * was not found.
887  *
888  * @since 0.3.0
889  */
890 SR_API const struct sr_key_info *sr_key_info_get(int keytype, uint32_t key)
891 {
892  struct sr_key_info *table;
893  int i;
894 
895  if (!(table = get_keytable(keytype)))
896  return NULL;
897 
898  for (i = 0; table[i].key; i++) {
899  if (table[i].key == key)
900  return &table[i];
901  }
902 
903  return NULL;
904 }
905 
906 /**
907  * Get information about a key, by name.
908  *
909  * @param[in] keytype The namespace the key is in.
910  * @param[in] keyid The key id string.
911  *
912  * @return A pointer to a struct sr_key_info, or NULL if the key
913  * was not found.
914  *
915  * @since 0.2.0
916  */
917 SR_API const struct sr_key_info *sr_key_info_name_get(int keytype, const char *keyid)
918 {
919  struct sr_key_info *table;
920  int i;
921 
922  if (!(table = get_keytable(keytype)))
923  return NULL;
924 
925  for (i = 0; table[i].key; i++) {
926  if (!table[i].id)
927  continue;
928  if (!strcmp(table[i].id, keyid))
929  return &table[i];
930  }
931 
932  return NULL;
933 }
934 
935 /** @} */
Generic/unspecified error.
Definition: libsigrok.h:68
Output frequency target in Hz.
Definition: libsigrok.h:966
Time is duration (as opposed to epoch, ...).
Definition: libsigrok.h:379
Reference value shown.
Definition: libsigrok.h:383
Sound pressure level is not weighted in the frequency domain, albeit without standards-defined low an...
Definition: libsigrok.h:365
GSList * sr_driver_scan(struct sr_dev_driver *driver, GSList *options)
Tell a hardware driver to scan for devices.
Definition: hwdriver.c:509
const char * name
Full capitalized name, e.g.
Definition: libsigrok.h:645
Sound pressure level is A-weighted in the frequency domain, according to IEC 61672:2003.
Definition: libsigrok.h:356
The device can measure temperature.
Definition: libsigrok.h:680
The device supports setting the number of logic channels.
Definition: libsigrok.h:846
The device supports setting the number of analog channels.
Definition: libsigrok.h:849
The device supports setting a sample number limit (how many samples should be acquired).
Definition: libsigrok.h:1036
Apparent power.
Definition: libsigrok.h:231
The device supports run-length encoding (RLE).
Definition: libsigrok.h:765
Measurement is four wire (e.g.
Definition: libsigrok.h:387
Harmonic ratio.
Definition: libsigrok.h:235
The device can act as an oscilloscope.
Definition: libsigrok.h:668
This is a true RMS measurement.
Definition: libsigrok.h:341
The device can act as an LCR meter.
Definition: libsigrok.h:695
Under-voltage condition active.
Definition: libsigrok.h:981
Series capacitance (LCR meter model).
Definition: libsigrok.h:215
Equivalent circuit model.
Definition: libsigrok.h:972
Channel regulation get: "CV", "CC" or "UR", denoting constant voltage, constant current or unregulate...
Definition: libsigrok.h:957
int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver)
Initialize a hardware driver.
Definition: hwdriver.c:383
Sound pressure level measurement is S-weighted (1s) in the time domain.
Definition: libsigrok.h:368
Min hold mode.
Definition: libsigrok.h:825
The device supports continuous sampling.
Definition: libsigrok.h:1049
Number of vertical divisions, as related to SR_CONF_VDIV.
Definition: libsigrok.h:810
Duty cycle, e.g.
Definition: libsigrok.h:184
Carbon monoxide level.
Definition: libsigrok.h:197
Sound pressure level measurement is F-weighted (125ms) in the time domain.
Definition: libsigrok.h:371
Over-current protection (OCP) feature.
Definition: libsigrok.h:928
No error.
Definition: libsigrok.h:67
The device can act as a scale.
Definition: libsigrok.h:701
The device supports setting a sample time limit (how long the sample acquisition should run...
Definition: libsigrok.h:1030
int sr_config_commit(const struct sr_dev_inst *sdi)
Apply configuration settings to the device hardware.
Definition: hwdriver.c:791
GArray * sr_driver_scan_options_list(const struct sr_dev_driver *driver)
Enumerate scan options supported by this driver.
Definition: hwdriver.c:419
Data source for acquisition.
Definition: libsigrok.h:1014
int(* cleanup)(const struct sr_dev_driver *driver)
Called before driver is unloaded.
Definition: libsigrok.h:1112
The public libsigrok header file to be used by frontends.
Over-current protection (OCP) threshold.
Definition: libsigrok.h:944
Logic low-high threshold range.
Definition: libsigrok.h:828
Sound pressure level is time-averaged (LAT), also known as Equivalent Continuous A-weighted Sound Lev...
Definition: libsigrok.h:374
Trigger level.
Definition: libsigrok.h:984
Device is in autoranging mode.
Definition: libsigrok.h:351
Buffer size.
Definition: libsigrok.h:786
Sound pressure level is C-weighted in the frequency domain, according to IEC 61672:2003.
Definition: libsigrok.h:359
const char * name
Driver name.
Definition: libsigrok.h:1103
Coupling.
Definition: libsigrok.h:798
struct sr_dev_driver ** sr_driver_list(const struct sr_context *ctx)
Return the list of supported hardware drivers.
Definition: hwdriver.c:356
The device is a demo device.
Definition: libsigrok.h:674
Device is in "min" mode, only updating upon a new min value.
Definition: libsigrok.h:349
Electrical power, usually in W, or dBm.
Definition: libsigrok.h:190
Sound pressure level represented as a percentage of measurements that were over a preset alarm level...
Definition: libsigrok.h:377
int datatype
Data type like SR_T_STRING, etc if applicable.
Definition: libsigrok.h:641
The device supports specifying a capturefile to inject.
Definition: libsigrok.h:994
Voltage measurement is alternating current (AC).
Definition: libsigrok.h:337
The device supports setting a pre/post-trigger capture ratio.
Definition: libsigrok.h:759
Power off the device.
Definition: libsigrok.h:1000
Used for setting or getting value of a config item.
Definition: libsigrok.h:623
Horizontal trigger position.
Definition: libsigrok.h:783
The device supports specifying the capturefile unit size.
Definition: libsigrok.h:997
Output frequency in Hz.
Definition: libsigrok.h:963
Current voltage.
Definition: libsigrok.h:856
Specification on how to connect to a device.
Definition: libsigrok.h:720
Trigger source.
Definition: libsigrok.h:780
The device can measure energy consumption.
Definition: libsigrok.h:686
Dissipation factor.
Definition: libsigrok.h:219
Count.
Definition: libsigrok.h:227
The device supports setting its sample interval, in ms.
Definition: libsigrok.h:804
Device is in "hold" mode (repeating the last measurement).
Definition: libsigrok.h:345
The device has internal storage, into which data is logged.
Definition: libsigrok.h:1053
Enabling/disabling channel.
Definition: libsigrok.h:887
Over-voltage protection (OVP) threshold.
Definition: libsigrok.h:920
Parallel inductance (LCR meter model).
Definition: libsigrok.h:207
Possible values can be enumerated.
Definition: libsigrok.h:657
Wind speed.
Definition: libsigrok.h:203
Information about a key.
Definition: libsigrok.h:637
Number of powerline cycles for ADC integration time.
Definition: libsigrok.h:1020
The device can act as a function generator.
Definition: libsigrok.h:704
const struct sr_key_info * sr_key_info_name_get(int keytype, const char *keyid)
Get information about a key, by name.
Definition: hwdriver.c:917
Parallel resistance (LCR meter model).
Definition: libsigrok.h:211
Series resistance (LCR meter model).
Definition: libsigrok.h:217
GVariant * data
Key-specific data.
Definition: libsigrok.h:627
The device can measure humidity.
Definition: libsigrok.h:683
int(* config_list)(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
List all possible values for a configuration key in a device instance.
Definition: libsigrok.h:1148
The device can act as a multimeter.
Definition: libsigrok.h:671
The device supports using an external clock.
Definition: libsigrok.h:831
Channel configuration.
Definition: libsigrok.h:896
Mass.
Definition: libsigrok.h:233
The device supports setting its samplerate, in Hz.
Definition: libsigrok.h:756
Structure for groups of channels that have common properties.
Definition: libsigrok.h:613
The device can act as logic analyzer.
Definition: libsigrok.h:665
The device can act as a signal demodulator.
Definition: libsigrok.h:689
Current current.
Definition: libsigrok.h:871
int sr_config_list(const struct sr_dev_driver *driver, const struct sr_dev_inst *sdi, const struct sr_channel_group *cg, uint32_t key, GVariant **data)
List all possible values for a configuration key.
Definition: hwdriver.c:830
Amplitude of a source without strictly-defined MQ.
Definition: libsigrok.h:950
Continuity test.
Definition: libsigrok.h:186
#define SR_PRIV
Definition: libsigrok.h:128
Phase angle.
Definition: libsigrok.h:223
Over-voltage protection (OVP) active.
Definition: libsigrok.h:912
The device supports averaging.
Definition: libsigrok.h:771
Modbus slave address specification.
Definition: libsigrok.h:749
The device supports swapping channels.
Definition: libsigrok.h:837
int sr_config_set(const struct sr_dev_inst *sdi, const struct sr_channel_group *cg, uint32_t key, GVariant *data)
Set value of a configuration key in a device instance.
Definition: hwdriver.c:758
Maximum target voltage.
Definition: libsigrok.h:864
char * name
Name of the channel group.
Definition: libsigrok.h:615
Pressure.
Definition: libsigrok.h:205
Device is in "avg" mode, averaging upon each new value.
Definition: libsigrok.h:381
Quality factor.
Definition: libsigrok.h:221
Sound pressure level time weighting.
Definition: libsigrok.h:816
Device mode for multi-function devices.
Definition: libsigrok.h:1056
Voltage measurement is direct current (DC).
Definition: libsigrok.h:339
The device can act as a sound level meter.
Definition: libsigrok.h:677
Filter.
Definition: libsigrok.h:792
The device supports setting trigger slope.
Definition: libsigrok.h:768
Serial communication specification, in the form:
Definition: libsigrok.h:741
Device driver data.
Definition: libsigrok.h:1100
void * context
Device driver context, considered private.
Definition: libsigrok.h:1164
GSList *(* scan)(struct sr_dev_driver *driver, GSList *options)
Scan for devices.
Definition: libsigrok.h:1119
Measured quantity.
Definition: libsigrok.h:969
uint32_t key
Config key like SR_CONF_CONN, MQ value like SR_MQ_VOLTAGE, etc.
Definition: libsigrok.h:639
Series inductance (LCR meter model).
Definition: libsigrok.h:213
Max hold mode.
Definition: libsigrok.h:822
int sr_config_get(const struct sr_dev_driver *driver, const struct sr_dev_inst *sdi, const struct sr_channel_group *cg, uint32_t key, GVariant **data)
Query value of a configuration key at the given driver or device instance.
Definition: hwdriver.c:707
The device supports setting a pattern (pattern generator mode).
Definition: libsigrok.h:762
Current limit.
Definition: libsigrok.h:879
Gain (a transistor's gain, or hFE, for example).
Definition: libsigrok.h:192
The device supports setting number of samples to be averaged over.
Definition: libsigrok.h:777
Power factor.
Definition: libsigrok.h:229
Function argument error.
Definition: libsigrok.h:70
Volts/div.
Definition: libsigrok.h:795
The device supports setting a probe factor.
Definition: libsigrok.h:1017
The device can act as a programmable power supply.
Definition: libsigrok.h:692
Sound pressure level is Z-weighted (i.e.
Definition: libsigrok.h:362
Time base.
Definition: libsigrok.h:789
Center frequency.
Definition: libsigrok.h:843
Value can be read.
Definition: libsigrok.h:653
int(* init)(struct sr_dev_driver *driver, struct sr_context *sr_ctx)
Called when driver is loaded, e.g.
Definition: libsigrok.h:1109
uint32_t key
Config key like SR_CONF_CONN, etc.
Definition: libsigrok.h:625
Over-temperature protection (OTP)
Definition: libsigrok.h:960
Under-voltage condition.
Definition: libsigrok.h:978
Over-voltage protection (OVP) feature.
Definition: libsigrok.h:904
Difference from reference value.
Definition: libsigrok.h:225
Time.
Definition: libsigrok.h:201
Over-temperature protection (OTP) active.
Definition: libsigrok.h:975
Value is voltage drop across a diode, or NAN.
Definition: libsigrok.h:343
Parallel capacitance (LCR meter model).
Definition: libsigrok.h:209
int(* config_get)(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
Query value of a configuration key in driver or given device instance.
Definition: libsigrok.h:1130
Sound pressure level measurement range.
Definition: libsigrok.h:819
const char * id
Short, lowercase ID string, e.g.
Definition: libsigrok.h:643
Device is in "max" mode, only updating upon a new max value.
Definition: libsigrok.h:347
Device is in relative mode.
Definition: libsigrok.h:353
The device supports setting a frame limit (how many frames should be acquired).
Definition: libsigrok.h:1042
Logarithmic representation of sound pressure relative to a reference value.
Definition: libsigrok.h:195
const struct sr_key_info * sr_key_info_get(int keytype, uint32_t key)
Get information about a key, by key.
Definition: hwdriver.c:890
The device can act as an electronic load.
Definition: libsigrok.h:698
Self test mode.
Definition: libsigrok.h:1059
Value can be written.
Definition: libsigrok.h:655
Sound pressure level frequency weighting.
Definition: libsigrok.h:813
Trigger matches.
Definition: libsigrok.h:801
Number of horizontal divisions, as related to SR_CONF_TIMEBASE.
Definition: libsigrok.h:807
Session filename.
Definition: libsigrok.h:991
Opaque structure representing a libsigrok context.
#define SR_API
Definition: libsigrok.h:121
Over-current protection (OCP) active.
Definition: libsigrok.h:936
Choice of clock edge for external clock ("r" or "f").
Definition: libsigrok.h:947
Unstable value (hasn't settled yet).
Definition: libsigrok.h:385