2 * This file is part of the sigrok project.
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
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/>.
20 #ifndef LIBSIGROK_SIGROK_H
21 #define LIBSIGROK_SIGROK_H
34 * Status/error codes returned by libsigrok functions.
36 * All possible return codes of libsigrok functions must be listed here.
37 * Functions should never return hardcoded numbers as status, but rather
38 * use these #defines instead. All error codes are negative numbers.
40 * The error codes are globally unique in libsigrok, i.e. if one of the
41 * libsigrok functions returns a "malloc error" it must be exactly the same
42 * return value as used by all other functions to indicate "malloc error".
43 * There must be no functions which indicate two different errors via the
46 * Also, for compatibility reasons, no defined return codes are ever removed
47 * or reused for different #defines later. You can only add new #defines and
48 * return codes, but never remove or redefine existing ones.
50 #define SR_OK 0 /* No error */
51 #define SR_ERR -1 /* Generic/unspecified error */
52 #define SR_ERR_MALLOC -2 /* Malloc/calloc/realloc error */
53 #define SR_ERR_ARG -3 /* Function argument error */
54 #define SR_ERR_BUG -4 /* Errors hinting at internal bugs */
55 #define SR_ERR_SAMPLERATE -5 /* Incorrect samplerate */
57 #define SR_MAX_NUM_PROBES 64 /* Limited by uint64_t. */
58 #define SR_MAX_PROBENAME_LEN 32
60 /* Handy little macros */
62 #define SR_KHZ(n) ((n) * 1000)
63 #define SR_MHZ(n) ((n) * 1000000)
64 #define SR_GHZ(n) ((n) * 1000000000)
66 #define SR_HZ_TO_NS(n) (1000000000 / (n))
68 /* libsigrok loglevels. */
69 #define SR_LOG_NONE 0 /**< Output no messages at all. */
70 #define SR_LOG_ERR 1 /**< Output error messages. */
71 #define SR_LOG_WARN 2 /**< Output warnings. */
72 #define SR_LOG_INFO 3 /**< Output informational messages. */
73 #define SR_LOG_DBG 4 /**< Output debug messages. */
74 #define SR_LOG_SPEW 5 /**< Output very noisy debug messages. */
77 * Use SR_API to mark public API symbols, and SR_PRIV for private symbols.
79 * Variables and functions marked 'static' are private already and don't
80 * need SR_PRIV. However, functions which are not static (because they need
81 * to be used in other libsigrok-internal files) but are also not meant to
82 * be part of the public libsigrok API, must use SR_PRIV.
84 * This uses the 'visibility' feature of gcc (requires gcc >= 4.0).
86 * This feature is not available on MinGW/Windows, as it is a feature of
87 * ELF files and MinGW/Windows uses PE files.
89 * Details: http://gcc.gnu.org/wiki/Visibility
92 /* Marks public libsigrok API symbols. */
94 #define SR_API __attribute__((visibility("default")))
99 /* Marks private, non-public libsigrok symbols (not part of the API). */
101 #define SR_PRIV __attribute__((visibility("hidden")))
106 typedef int (*sr_receive_data_callback_t)(int fd, int revents, void *cb_data);
108 /* Data types used by hardware drivers for dev_config_set() */
114 SR_T_RATIONAL_PERIOD,
126 /* sr_datafeed_packet.type values */
139 /* sr_datafeed_analog.mq values */
151 /** For a measurement of electrical power, usually in W, or dBm */
153 /** Usually for measuring a transistor's gain, or h_FE*/
157 /* sr_datafeed_analog.unit values */
170 /** Unit of conductance, the inverse of resistance */
172 /** An absolute measurement of power, in decibels, referenced to
175 /** Measurements that intrinsically, do not have units attached, such
176 * as ratios, gains, etc
177 * Specifically, a transistor's gain (hFE) is a unitless quantity*/
181 /** sr_datafeed_analog.flags values */
183 /** Voltage measurement is alternating current. */
185 /** Voltage measurement is direct current. */
187 /** This is a true RMS measurement. */
188 SR_MQFLAG_RMS = 0x04,
189 /** Value is voltage drop across a diode, or NAN. */
190 SR_MQFLAG_DIODE = 0x08,
191 /** Device is in "hold" mode, i.e. repeating the last measurement. */
192 SR_MQFLAG_HOLD = 0x10,
193 /** Device is in "max" mode, only updating when a new max value is found. */
194 SR_MQFLAG_MAX = 0x20,
195 /** Device is in "min" mode, only updating when a new min value is found. */
196 SR_MQFLAG_MIN = 0x40,
197 /** Device is in autoranging mode. */
198 SR_MQFLAG_AUTORANGE = 0x80,
199 /** Device is in relative mode. */
200 SR_MQFLAG_RELATIVE = 0x100,
203 struct sr_datafeed_packet {
208 struct sr_datafeed_header {
210 struct timeval starttime;
213 struct sr_datafeed_meta_logic {
218 struct sr_datafeed_logic {
224 struct sr_datafeed_meta_analog {
228 struct sr_datafeed_analog {
230 /** Measured quantity (e.g. voltage, current, temperature) */
232 /** Unit in which the MQ is measured. */
234 /** Bitmap with extra information about the MQ. */
240 struct sr_input_format *format;
242 struct sr_dev_inst *sdi;
246 struct sr_input_format {
249 int (*format_match) (const char *filename);
250 int (*init) (struct sr_input *in);
251 int (*loadfile) (struct sr_input *in, const char *filename);
255 struct sr_output_format *format;
256 struct sr_dev_inst *sdi;
261 struct sr_output_format {
265 int (*init) (struct sr_output *o);
266 int (*data) (struct sr_output *o, const uint8_t *data_in,
267 uint64_t length_in, uint8_t **data_out,
268 uint64_t *length_out);
269 int (*event) (struct sr_output *o, int event_type, uint8_t **data_out,
270 uint64_t *length_out);
271 GString *(*recv) (struct sr_output *o, const struct sr_dev_inst *sdi,
272 struct sr_datafeed_packet *packet);
273 int (*cleanup) (struct sr_output *o);
276 struct sr_datastore {
277 /* Size in bytes of the number of units stored in this datastore */
279 unsigned int num_units; /* TODO: uint64_t */
284 * This represents a generic device connected to the system.
285 * For device-specific information, ask the driver. The driver_index refers
286 * to the device index within that driver; it may be handling more than one
287 * device. All relevant driver calls take a dev_index parameter for this.
290 /* Which driver handles this device */
291 struct sr_dev_driver *driver;
292 /* A driver may handle multiple devices of the same type */
294 /* List of struct sr_probe* */
296 /* Data acquired by this device, if any */
297 struct sr_datastore *datastore;
318 /* Hardware driver options */
320 SR_HWOPT_DUMMY = 0, /* Used to terminate lists. Must be 0! */
322 /** Some drivers cannot detect the exact model they're talking to. */
325 /** Specification on how to connect to a device */
328 /** Serial communication spec: <data bits><parity><stop bit> e.g. 8n1 */
332 /* Hardware device capabilities */
334 SR_HWCAP_DUMMY = 0, /* Used to terminate lists. Must be 0! */
336 /*--- Device classes ------------------------------------------------*/
338 /** The device can act as logic analyzer. */
339 SR_HWCAP_LOGIC_ANALYZER,
341 /** The device can act as an oscilloscope. */
342 SR_HWCAP_OSCILLOSCOPE,
344 /** The device can act as a multimeter. */
347 /** The device is a demo device. */
351 /*--- Device configuration ------------------------------------------*/
353 /** The device supports setting/changing its samplerate. */
356 /** The device supports setting a pre/post-trigger capture ratio. */
357 SR_HWCAP_CAPTURE_RATIO,
360 /** The device supports setting a pattern (pattern generator mode). */
361 SR_HWCAP_PATTERN_MODE,
363 /** The device supports Run Length Encoding. */
366 /** The device supports setting trigger slope. */
367 SR_HWCAP_TRIGGER_SLOPE,
369 /** Trigger source. */
370 SR_HWCAP_TRIGGER_SOURCE,
372 /** Horizontal trigger position */
373 SR_HWCAP_HORIZ_TRIGGERPOS,
391 /*--- Special stuff -------------------------------------------------*/
393 /** Session filename */
394 SR_HWCAP_SESSIONFILE,
396 /* TODO: Better description. */
397 /** The device supports specifying a capturefile to inject. */
398 SR_HWCAP_CAPTUREFILE,
400 /* TODO: Better description. */
401 /** The device supports specifying the capturefile unit size. */
402 SR_HWCAP_CAPTURE_UNITSIZE,
404 /* TODO: Better description. */
405 /** The device supports setting the number of probes. */
406 SR_HWCAP_CAPTURE_NUM_PROBES,
409 /*--- Acquisition modes ---------------------------------------------*/
412 * The device supports setting a sample time limit, i.e. how long the
413 * sample acquisition should run (in ms).
418 * The device supports setting a sample number limit, i.e. how many
419 * samples should be acquired.
421 SR_HWCAP_LIMIT_SAMPLES,
424 * The device supports setting a frame limit, i.e. how many
425 * frames should be acquired.
427 SR_HWCAP_LIMIT_FRAMES,
430 * The device supports continuous sampling, i.e. neither a time limit
431 * nor a sample number limit has to be supplied, it will just acquire
432 * samples continuously, until explicitly stopped by a certain command.
438 struct sr_hwcap_option {
446 struct sr_dev_driver *driver;
457 /* sr_dev_inst types */
459 /** Device instance type for USB devices. */
461 /** Device instance type for serial port devices. */
465 /* Device instance status */
468 /* Found, but still booting */
470 /* Live, but not in use */
472 /* Actively in use in a session */
477 * TODO: This sucks, you just kinda have to "know" the returned type.
478 * TODO: Need a DI to return the number of trigger stages supported.
481 /* Device info IDs */
483 /* A list of options supported by the driver. */
485 /* A list of capabilities supported by the device. */
487 /* The number of probes connected to this device */
489 /* The probe names on this device */
491 /* Samplerates supported by this device, (struct sr_samplerates) */
493 /* Types of logic trigger supported, out of "01crf" (char *) */
495 /* The currently set samplerate in Hz (uint64_t) */
496 SR_DI_CUR_SAMPLERATE,
497 /* Supported patterns (in pattern generator mode) */
499 /* Supported buffer sizes */
501 /* Supported time bases */
503 /* Supported trigger sources */
504 SR_DI_TRIGGER_SOURCES,
505 /* Supported filter targets */
507 /* Valid volts/div values */
509 /* Coupling options */
514 * A device supports either a range of samplerates with steps of a given
515 * granularity, or is limited to a set of defined samplerates. Use either
516 * step or list, but not both.
518 struct sr_samplerates {
522 const uint64_t *list;
525 struct sr_dev_driver {
526 /* Driver-specific */
531 int (*cleanup) (void);
532 GSList *(*scan) (GSList *options);
533 GSList *(*dev_list) (void);
534 int (*dev_clear) (void);
536 /* Device-specific */
537 int (*dev_open) (struct sr_dev_inst *sdi);
538 int (*dev_close) (struct sr_dev_inst *sdi);
539 int (*info_get) (int info_id, const void **data,
540 const struct sr_dev_inst *sdi);
541 int (*dev_config_set) (const struct sr_dev_inst *sdi, int hwcap,
543 int (*dev_acquisition_start) (const struct sr_dev_inst *sdi,
545 int (*dev_acquisition_stop) (const struct sr_dev_inst *sdi,
552 /* Private driver context. */
558 /* List of struct sr_dev* */
560 /* list of sr_receive_data_callback_t */
561 GSList *datafeed_callbacks;
564 unsigned int num_sources;
566 /* Both "sources" and "pollfds" are of the same size and contain pairs of
567 * descriptor and callback function. We can not embed the GPollFD into the
568 * source struct since we want to be able to pass the array of all poll
569 * descriptors to g_poll.
571 struct source *sources;