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 /* sr_datafeed_analog.unit values */
165 struct sr_datafeed_packet {
170 struct sr_datafeed_header {
172 struct timeval starttime;
175 struct sr_datafeed_meta_logic {
180 struct sr_datafeed_logic {
186 struct sr_datafeed_meta_analog {
190 struct sr_datafeed_analog {
192 int mq; /* Measured quantity (e.g. voltage, current, temperature) */
193 int unit; /* Unit in which the MQ is measured. */
198 struct sr_input_format *format;
200 struct sr_dev_inst *sdi;
204 struct sr_input_format {
207 int (*format_match) (const char *filename);
208 int (*init) (struct sr_input *in);
209 int (*loadfile) (struct sr_input *in, const char *filename);
213 struct sr_output_format *format;
214 struct sr_dev_inst *sdi;
219 struct sr_output_format {
223 int (*init) (struct sr_output *o);
224 int (*data) (struct sr_output *o, const uint8_t *data_in,
225 uint64_t length_in, uint8_t **data_out,
226 uint64_t *length_out);
227 int (*event) (struct sr_output *o, int event_type, uint8_t **data_out,
228 uint64_t *length_out);
231 struct sr_datastore {
232 /* Size in bytes of the number of units stored in this datastore */
234 unsigned int num_units; /* TODO: uint64_t */
239 * This represents a generic device connected to the system.
240 * For device-specific information, ask the driver. The driver_index refers
241 * to the device index within that driver; it may be handling more than one
242 * device. All relevant driver calls take a dev_index parameter for this.
245 /* Which driver handles this device */
246 struct sr_dev_driver *driver;
247 /* A driver may handle multiple devices of the same type */
249 /* List of struct sr_probe* */
251 /* Data acquired by this device, if any */
252 struct sr_datastore *datastore;
273 /* Hardware driver options */
275 SR_HWOPT_DUMMY = 0, /* Used to terminate lists. Must be 0! */
277 /** Some drivers cannot detect the exact model they're talking to. */
280 /** Specification on how to connect to a device */
283 /** Serial communication spec: <data bits><parity><stop bit> e.g. 8n1 */
287 /* Hardware device capabilities */
289 SR_HWCAP_DUMMY = 0, /* Used to terminate lists. Must be 0! */
291 /*--- Device classes ------------------------------------------------*/
293 /** The device can act as logic analyzer. */
294 SR_HWCAP_LOGIC_ANALYZER,
296 /** The device can act as an oscilloscope. */
297 SR_HWCAP_OSCILLOSCOPE,
299 /** The device can act as a multimeter. */
302 /** The device is a demo device. */
306 /*--- Device configuration ------------------------------------------*/
308 /** The device supports setting/changing its samplerate. */
311 /** The device supports setting a pre/post-trigger capture ratio. */
312 SR_HWCAP_CAPTURE_RATIO,
315 /** The device supports setting a pattern (pattern generator mode). */
316 SR_HWCAP_PATTERN_MODE,
318 /** The device supports Run Length Encoding. */
321 /** The device supports setting trigger slope. */
322 SR_HWCAP_TRIGGER_SLOPE,
324 /** Trigger source. */
325 SR_HWCAP_TRIGGER_SOURCE,
327 /** Horizontal trigger position */
328 SR_HWCAP_HORIZ_TRIGGERPOS,
346 /*--- Special stuff -------------------------------------------------*/
348 /** Session filename */
349 SR_HWCAP_SESSIONFILE,
351 /* TODO: Better description. */
352 /** The device supports specifying a capturefile to inject. */
353 SR_HWCAP_CAPTUREFILE,
355 /* TODO: Better description. */
356 /** The device supports specifying the capturefile unit size. */
357 SR_HWCAP_CAPTURE_UNITSIZE,
359 /* TODO: Better description. */
360 /** The device supports setting the number of probes. */
361 SR_HWCAP_CAPTURE_NUM_PROBES,
364 /*--- Acquisition modes ---------------------------------------------*/
367 * The device supports setting a sample time limit, i.e. how long the
368 * sample acquisition should run (in ms).
373 * The device supports setting a sample number limit, i.e. how many
374 * samples should be acquired.
376 SR_HWCAP_LIMIT_SAMPLES,
379 * The device supports setting a frame limit, i.e. how many
380 * frames should be acquired.
382 SR_HWCAP_LIMIT_FRAMES,
385 * The device supports continuous sampling, i.e. neither a time limit
386 * nor a sample number limit has to be supplied, it will just acquire
387 * samples continuously, until explicitly stopped by a certain command.
393 struct sr_hwcap_option {
401 struct sr_dev_driver *driver;
412 /* sr_dev_inst types */
414 /** Device instance type for USB devices. */
416 /** Device instance type for serial port devices. */
420 /* Device instance status */
423 /* Found, but still booting */
425 /* Live, but not in use */
427 /* Actively in use in a session */
432 * TODO: This sucks, you just kinda have to "know" the returned type.
433 * TODO: Need a DI to return the number of trigger stages supported.
436 /* Device info IDs */
438 /* A list of options supported by the driver. */
440 /* A list of capabilities supported by the device. */
442 /* The number of probes connected to this device */
444 /* The probe names on this device */
446 /* Samplerates supported by this device, (struct sr_samplerates) */
448 /* Types of logic trigger supported, out of "01crf" (char *) */
450 /* The currently set samplerate in Hz (uint64_t) */
451 SR_DI_CUR_SAMPLERATE,
452 /* Supported patterns (in pattern generator mode) */
454 /* Supported buffer sizes */
456 /* Supported time bases */
458 /* Supported trigger sources */
459 SR_DI_TRIGGER_SOURCES,
460 /* Supported filter targets */
462 /* Valid volts/div values */
464 /* Coupling options */
469 * A device supports either a range of samplerates with steps of a given
470 * granularity, or is limited to a set of defined samplerates. Use either
471 * step or list, but not both.
473 struct sr_samplerates {
477 const uint64_t *list;
480 struct sr_dev_driver {
481 /* Driver-specific */
486 int (*cleanup) (void);
487 GSList *(*scan) (GSList *options);
488 GSList *(*dev_list) (void);
489 int (*dev_clear) (void);
491 /* Device-specific */
492 int (*dev_open) (struct sr_dev_inst *sdi);
493 int (*dev_close) (struct sr_dev_inst *sdi);
494 int (*info_get) (int info_id, const void **data,
495 const struct sr_dev_inst *sdi);
496 int (*dev_config_set) (const struct sr_dev_inst *sdi, int hwcap,
498 int (*dev_acquisition_start) (const struct sr_dev_inst *sdi,
500 int (*dev_acquisition_stop) (const struct sr_dev_inst *sdi,
508 /* List of struct sr_dev* */
510 /* list of sr_receive_data_callback_t */
511 GSList *datafeed_callbacks;
514 unsigned int num_sources;
516 /* Both "sources" and "pollfds" are of the same size and contain pairs of
517 * descriptor and callback function. We can not embed the GPollFD into the
518 * source struct since we want to be able to pass the array of all poll
519 * descriptors to g_poll.
521 struct source *sources;