2 * This file is part of the libsigrok project.
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
5 * Copyright (C) 2012 Peter Stuge <peter@stuge.se>
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include <libsigrok/libsigrok.h>
27 #include "libsigrok-internal.h"
30 #define LOG_PREFIX "backend"
34 * @mainpage libsigrok API
36 * @section sec_intro Introduction
38 * The <a href="http://sigrok.org">sigrok</a> project aims at creating a
39 * portable, cross-platform, Free/Libre/Open-Source signal analysis software
40 * suite that supports various device types (such as logic analyzers,
41 * oscilloscopes, multimeters, and more).
43 * <a href="http://sigrok.org/wiki/Libsigrok">libsigrok</a> is a shared
44 * library written in C which provides the basic API for talking to
45 * <a href="http://sigrok.org/wiki/Supported_hardware">supported hardware</a>
46 * and reading/writing the acquired data into various
47 * <a href="http://sigrok.org/wiki/Input_output_formats">input/output
50 * @section sec_api API reference
52 * See the "Modules" page for an introduction to various libsigrok
53 * related topics and the detailed API documentation of the respective
56 * You can also browse the API documentation by file, or review all
59 * @section sec_mailinglists Mailing lists
61 * There is one mailing list for sigrok/libsigrok: <a href="https://lists.sourceforge.net/lists/listinfo/sigrok-devel">sigrok-devel</a>.
63 * @section sec_irc IRC
65 * You can find the sigrok developers in the
66 * <a href="irc://chat.freenode.net/sigrok">\#sigrok</a>
67 * IRC channel on Freenode.
69 * @section sec_website Website
71 * <a href="http://sigrok.org/wiki/Libsigrok">sigrok.org/wiki/Libsigrok</a>
77 * Initializing and shutting down libsigrok.
81 * @defgroup grp_init Initialization
83 * Initializing and shutting down libsigrok.
85 * Before using any of the libsigrok functionality (except for
86 * sr_log_loglevel_set()), sr_init() must be called to initialize the
87 * library, which will return a struct sr_context when the initialization
90 * When libsigrok functionality is no longer needed, sr_exit() should be
91 * called, which will (among other things) free the struct sr_context.
93 * Example for a minimal program using libsigrok:
97 * #include <libsigrok/libsigrok.h>
99 * int main(int argc, char **argv)
102 * struct sr_context *sr_ctx;
104 * if ((ret = sr_init(&sr_ctx)) != SR_OK) {
105 * printf("Error initializing libsigrok (%s): %s.\n",
106 * sr_strerror_name(ret), sr_strerror(ret));
110 * // Use libsigrok functions here...
112 * if ((ret = sr_exit(sr_ctx)) != SR_OK) {
113 * printf("Error shutting down libsigrok (%s): %s.\n",
114 * sr_strerror_name(ret), sr_strerror(ret));
125 SR_API GSList *sr_buildinfo_libs_get(void)
127 GSList *l = NULL, *m = NULL;
128 #if defined(HAVE_LIBUSB_1_0) && !defined(__FreeBSD__)
129 const struct libusb_version *lv;
132 m = g_slist_append(NULL, g_strdup("glib"));
133 m = g_slist_append(m, g_strdup_printf("%d.%d.%d (rt: %d.%d.%d/%d:%d)",
134 GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION, GLIB_MICRO_VERSION,
135 glib_major_version, glib_minor_version, glib_micro_version,
136 glib_binary_age, glib_interface_age));
137 l = g_slist_append(l, m);
139 m = g_slist_append(NULL, g_strdup("libzip"));
140 m = g_slist_append(m, g_strdup_printf("%s", CONF_LIBZIP_VERSION));
141 l = g_slist_append(l, m);
143 #ifdef HAVE_LIBSERIALPORT
144 m = g_slist_append(NULL, g_strdup("libserialport"));
145 m = g_slist_append(m, g_strdup_printf("%s/%s (rt: %s/%s)",
146 SP_PACKAGE_VERSION_STRING, SP_LIB_VERSION_STRING,
147 sp_get_package_version_string(), sp_get_lib_version_string()));
148 l = g_slist_append(l, m);
150 #ifdef HAVE_LIBUSB_1_0
151 m = g_slist_append(NULL, g_strdup("libusb-1.0"));
153 m = g_slist_append(m, g_strdup_printf("%s", CONF_LIBUSB_1_0_VERSION));
155 lv = libusb_get_version();
156 m = g_slist_append(m, g_strdup_printf("%d.%d.%d.%d%s API 0x%08x",
157 lv->major, lv->minor, lv->micro, lv->nano, lv->rc,
158 #if defined(LIBUSB_API_VERSION)
160 #elif defined(LIBUSBX_API_VERSION)
165 l = g_slist_append(l, m);
167 #ifdef HAVE_LIBHIDAPI
168 m = g_slist_append(NULL, g_strdup("hidapi"));
169 m = g_slist_append(m, g_strdup_printf("%s", CONF_LIBHIDAPI_VERSION));
170 l = g_slist_append(l, m);
173 m = g_slist_append(NULL, g_strdup("libftdi"));
174 m = g_slist_append(m, g_strdup_printf("%s", CONF_LIBFTDI_VERSION));
175 l = g_slist_append(l, m);
178 m = g_slist_append(NULL, g_strdup("libgpib"));
179 m = g_slist_append(m, g_strdup_printf("%s", CONF_LIBGPIB_VERSION));
180 l = g_slist_append(l, m);
182 #ifdef HAVE_LIBREVISA
183 m = g_slist_append(NULL, g_strdup("librevisa"));
184 m = g_slist_append(m, g_strdup_printf("%s", CONF_LIBREVISA_VERSION));
185 l = g_slist_append(l, m);
191 SR_API char *sr_buildinfo_host_get(void)
193 return g_strdup_printf("%s, %s-endian", CONF_HOST,
194 #ifdef WORDS_BIGENDIAN
202 SR_API char *sr_buildinfo_scpi_backends_get(void)
207 s = g_string_sized_new(200);
209 g_string_append_printf(s, "TCP, ");
211 g_string_append_printf(s, "RPC, ");
213 #ifdef HAVE_SERIAL_COMM
214 g_string_append_printf(s, "serial, ");
216 #ifdef HAVE_LIBREVISA
217 g_string_append_printf(s, "VISA, ");
220 g_string_append_printf(s, "GPIB, ");
222 #ifdef HAVE_LIBUSB_1_0
223 g_string_append_printf(s, "USBTMC, ");
225 s->str[s->len - 2] = '\0';
227 str = g_strdup(s->str);
228 g_string_free(s, TRUE);
233 static void print_versions(void)
236 GSList *l, *l_orig, *m;
238 const char *lib, *version;
240 sr_dbg("libsigrok %s/%s.",
241 sr_package_version_string_get(), sr_lib_version_string_get());
243 s = g_string_sized_new(200);
244 g_string_append(s, "Libs: ");
245 l_orig = sr_buildinfo_libs_get();
246 for (l = l_orig; l; l = l->next) {
249 version = m->next->data;
250 g_string_append_printf(s, "%s %s, ", lib, version);
251 g_slist_free_full(m, g_free);
253 g_slist_free(l_orig);
254 s->str[s->len - 2] = '.';
255 s->str[s->len - 1] = '\0';
256 sr_dbg("%s", s->str);
257 g_string_free(s, TRUE);
259 str = sr_buildinfo_host_get();
260 sr_dbg("Host: %s.", str);
263 str = sr_buildinfo_scpi_backends_get();
264 sr_dbg("SCPI backends: %s.", str);
268 static void print_resourcepaths(void)
272 sr_dbg("Firmware search paths:");
273 l_orig = sr_resourcepaths_get(SR_RESOURCE_FIRMWARE);
274 for (l = l_orig; l; l = l->next)
275 sr_dbg(" - %s", (const char *)l->data);
276 g_slist_free_full(l_orig, g_free);
280 * Sanity-check all libsigrok drivers.
282 * @param[in] ctx Pointer to a libsigrok context struct. Must not be NULL.
284 * @retval SR_OK All drivers are OK
285 * @retval SR_ERR One or more drivers have issues.
286 * @retval SR_ERR_ARG Invalid argument.
288 static int sanity_check_all_drivers(const struct sr_context *ctx)
290 int i, errors, ret = SR_OK;
291 struct sr_dev_driver **drivers;
297 sr_spew("Sanity-checking all drivers.");
299 drivers = sr_driver_list(ctx);
300 for (i = 0; drivers[i]; i++) {
303 d = (drivers[i]->name) ? drivers[i]->name : "NULL";
305 if (!drivers[i]->name) {
306 sr_err("No name in driver %d ('%s').", i, d);
309 if (!drivers[i]->longname) {
310 sr_err("No longname in driver %d ('%s').", i, d);
313 if (drivers[i]->api_version < 1) {
314 sr_err("API version in driver %d ('%s') < 1.", i, d);
317 if (!drivers[i]->init) {
318 sr_err("No init in driver %d ('%s').", i, d);
321 if (!drivers[i]->cleanup) {
322 sr_err("No cleanup in driver %d ('%s').", i, d);
325 if (!drivers[i]->scan) {
326 sr_err("No scan in driver %d ('%s').", i, d);
329 if (!drivers[i]->dev_list) {
330 sr_err("No dev_list in driver %d ('%s').", i, d);
333 if (!drivers[i]->dev_clear) {
334 sr_err("No dev_clear in driver %d ('%s').", i, d);
337 /* Note: config_get() is optional. */
338 if (!drivers[i]->config_set) {
339 sr_err("No config_set in driver %d ('%s').", i, d);
342 /* Note: config_channel_set() is optional. */
343 /* Note: config_commit() is optional. */
344 if (!drivers[i]->config_list) {
345 sr_err("No config_list in driver %d ('%s').", i, d);
348 if (!drivers[i]->dev_open) {
349 sr_err("No dev_open in driver %d ('%s').", i, d);
352 if (!drivers[i]->dev_close) {
353 sr_err("No dev_close in driver %d ('%s').", i, d);
356 if (!drivers[i]->dev_acquisition_start) {
357 sr_err("No dev_acquisition_start in driver %d ('%s').",
361 if (!drivers[i]->dev_acquisition_stop) {
362 sr_err("No dev_acquisition_stop in driver %d ('%s').",
367 /* Note: 'priv' is allowed to be NULL. */
379 * Sanity-check all libsigrok input modules.
381 * @retval SR_OK All modules are OK
382 * @retval SR_ERR One or more modules have issues.
384 static int sanity_check_all_input_modules(void)
386 int i, errors, ret = SR_OK;
387 const struct sr_input_module **inputs;
390 sr_spew("Sanity-checking all input modules.");
392 inputs = sr_input_list();
393 for (i = 0; inputs[i]; i++) {
396 d = (inputs[i]->id) ? inputs[i]->id : "NULL";
398 if (!inputs[i]->id) {
399 sr_err("No ID in module %d ('%s').", i, d);
402 if (!inputs[i]->name) {
403 sr_err("No name in module %d ('%s').", i, d);
406 if (!inputs[i]->desc) {
407 sr_err("No description in module %d ('%s').", i, d);
410 if (!inputs[i]->init) {
411 sr_err("No init in module %d ('%s').", i, d);
414 if (!inputs[i]->receive) {
415 sr_err("No receive in module %d ('%s').", i, d);
418 if (!inputs[i]->end) {
419 sr_err("No end in module %d ('%s').", i, d);
433 * Sanity-check all libsigrok output modules.
435 * @retval SR_OK All modules are OK
436 * @retval SR_ERR One or more modules have issues.
438 static int sanity_check_all_output_modules(void)
440 int i, errors, ret = SR_OK;
441 const struct sr_output_module **outputs;
444 sr_spew("Sanity-checking all output modules.");
446 outputs = sr_output_list();
447 for (i = 0; outputs[i]; i++) {
450 d = (outputs[i]->id) ? outputs[i]->id : "NULL";
452 if (!outputs[i]->id) {
453 sr_err("No ID in module %d ('%s').", i, d);
456 if (!outputs[i]->name) {
457 sr_err("No name in module %d ('%s').", i, d);
460 if (!outputs[i]->desc) {
461 sr_err("No description in module '%s'.", d);
464 if (!outputs[i]->receive) {
465 sr_err("No receive in module '%s'.", d);
479 * Sanity-check all libsigrok transform modules.
481 * @retval SR_OK All modules are OK
482 * @retval SR_ERR One or more modules have issues.
484 static int sanity_check_all_transform_modules(void)
486 int i, errors, ret = SR_OK;
487 const struct sr_transform_module **transforms;
490 sr_spew("Sanity-checking all transform modules.");
492 transforms = sr_transform_list();
493 for (i = 0; transforms[i]; i++) {
496 d = (transforms[i]->id) ? transforms[i]->id : "NULL";
498 if (!transforms[i]->id) {
499 sr_err("No ID in module %d ('%s').", i, d);
502 if (!transforms[i]->name) {
503 sr_err("No name in module %d ('%s').", i, d);
506 if (!transforms[i]->desc) {
507 sr_err("No description in module '%s'.", d);
510 /* Note: options() is optional. */
511 /* Note: init() is optional. */
512 if (!transforms[i]->receive) {
513 sr_err("No receive in module '%s'.", d);
516 /* Note: cleanup() is optional. */
528 * Initialize libsigrok.
530 * This function must be called before any other libsigrok function.
532 * @param ctx Pointer to a libsigrok context struct pointer. Must not be NULL.
533 * This will be a pointer to a newly allocated libsigrok context
534 * object upon success, and is undefined upon errors.
536 * @return SR_OK upon success, a (negative) error code otherwise. Upon errors
537 * the 'ctx' pointer is undefined and should not be used. Upon success,
538 * the context will be free'd by sr_exit() as part of the libsigrok
543 SR_API int sr_init(struct sr_context **ctx)
546 struct sr_context *context;
553 print_resourcepaths();
556 sr_err("%s(): libsigrok context was NULL.", __func__);
560 context = g_malloc0(sizeof(struct sr_context));
562 sr_drivers_init(context);
564 if (sanity_check_all_drivers(context) < 0) {
565 sr_err("Internal driver error(s), aborting.");
569 if (sanity_check_all_input_modules() < 0) {
570 sr_err("Internal input module error(s), aborting.");
574 if (sanity_check_all_output_modules() < 0) {
575 sr_err("Internal output module error(s), aborting.");
579 if (sanity_check_all_transform_modules() < 0) {
580 sr_err("Internal transform module error(s), aborting.");
585 if ((ret = WSAStartup(MAKEWORD(2, 2), &wsadata)) != 0) {
586 sr_err("WSAStartup failed with error code %d.", ret);
592 #ifdef HAVE_LIBUSB_1_0
593 ret = libusb_init(&context->libusb_ctx);
594 if (LIBUSB_SUCCESS != ret) {
595 sr_err("libusb_init() returned %s.", libusb_error_name(ret));
600 #ifdef HAVE_LIBHIDAPI
602 * According to <hidapi.h>, the hid_init() routine just returns
603 * zero or non-zero, and hid_error() appears to relate to calls
604 * for a specific device after hid_open(). Which means that there
605 * is no more detailled information available beyond success/fail
606 * at this point in time.
608 if (hid_init() != 0) {
609 sr_err("HIDAPI hid_init() failed.");
614 sr_resource_set_hooks(context, NULL, NULL, NULL, NULL);
626 * Shutdown libsigrok.
628 * @param ctx Pointer to a libsigrok context struct. Must not be NULL.
630 * @retval SR_OK Success
631 * @retval other Error code SR_ERR, ...
635 SR_API int sr_exit(struct sr_context *ctx)
638 sr_err("%s(): libsigrok context was NULL.", __func__);
642 sr_hw_cleanup_all(ctx);
648 #ifdef HAVE_LIBHIDAPI
651 #ifdef HAVE_LIBUSB_1_0
652 libusb_exit(ctx->libusb_ctx);
655 g_free(sr_driver_list(ctx));