2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013 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/>.
22 #include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
23 #include "libsigrok.h"
24 #include "libsigrok-internal.h"
27 #define LOG_PREFIX "device"
33 * Device handling in libsigrok.
37 * @defgroup grp_devices Devices
39 * Device handling in libsigrok.
45 * Allocate and initialize new struct sr_channel and add to sdi.
46 * @param[in] sdi The device instance the channel is connected to.
47 * @param[in] index @copydoc sr_channel::index
48 * @param[in] type @copydoc sr_channel::type
49 * @param[in] enabled @copydoc sr_channel::enabled
50 * @param[in] name @copydoc sr_channel::name
52 * @return A new struct sr_channel*.
54 SR_PRIV struct sr_channel *sr_channel_new(struct sr_dev_inst *sdi,
55 int index, int type, gboolean enabled, const char *name)
57 struct sr_channel *ch;
59 ch = g_malloc0(sizeof(struct sr_channel));
63 ch->enabled = enabled;
65 ch->name = g_strdup(name);
67 sdi->channels = g_slist_append(sdi->channels, ch);
73 * Set the name of the specified channel in the specified device.
75 * If the channel already has a different name assigned to it, it will be
76 * removed, and the new name will be saved instead.
78 * @param sdi The device instance the channel is connected to.
79 * @param[in] channelnum The number of the channel whose name to set.
80 * Note that the channel numbers start at 0.
81 * @param[in] name The new name that the specified channel should get. A copy
82 * of the string is made.
84 * @return SR_OK on success, or SR_ERR_ARG on invalid arguments.
88 SR_API int sr_dev_channel_name_set(const struct sr_dev_inst *sdi,
89 int channelnum, const char *name)
92 struct sr_channel *ch;
96 sr_err("%s: sdi was NULL", __func__);
101 for (l = sdi->channels; l; l = l->next) {
103 if (ch->index == channelnum) {
105 ch->name = g_strdup(name);
115 * Enable or disable a channel on the specified device.
117 * @param sdi The device instance the channel is connected to.
118 * @param channelnum The channel number, starting from 0.
119 * @param state TRUE to enable the channel, FALSE to disable.
121 * @return SR_OK on success or SR_ERR on failure. In case of invalid
122 * arguments, SR_ERR_ARG is returned and the channel enabled state
127 SR_API int sr_dev_channel_enable(const struct sr_dev_inst *sdi, int channelnum,
131 struct sr_channel *ch;
133 gboolean was_enabled;
139 for (l = sdi->channels; l; l = l->next) {
141 if (ch->index == channelnum) {
142 was_enabled = ch->enabled;
145 if (!state != !was_enabled && sdi->driver
146 && sdi->driver->config_channel_set) {
147 ret = sdi->driver->config_channel_set(
148 sdi, ch, SR_CHANNEL_SET_ENABLED);
149 /* Roll back change if it wasn't applicable. */
150 if (ret == SR_ERR_ARG)
151 ch->enabled = was_enabled;
161 * Determine whether the specified device instance has the specified
164 * @param sdi Pointer to the device instance to be checked. Must not be NULL.
165 * If the device's 'driver' field is NULL (virtual device), this
166 * function will always return FALSE (virtual devices don't have
167 * a hardware capabilities list).
168 * @param[in] key The option that should be checked for is supported by the
171 * @retval TRUE Device has the specified option
172 * @retval FALSE Device does not have the specified option, invalid input
173 * parameters or other error conditions.
177 SR_API gboolean sr_dev_has_option(const struct sr_dev_inst *sdi, int key)
184 if (!sdi || !sdi->driver || !sdi->driver->config_list)
187 if (sdi->driver->config_list(SR_CONF_DEVICE_OPTIONS,
188 &gvar, sdi, NULL) != SR_OK)
192 devopts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(int32_t));
193 for (i = 0; i < num_opts; i++) {
194 if ((devopts[i] & SR_CONF_MASK) == key) {
199 g_variant_unref(gvar);
205 * Allocate and init a new user-generated device instance.
207 * @param vendor Device vendor
208 * @param model Device model
209 * @param version Device version
211 * @retval struct sr_dev_inst *. Dynamically allocated, free using
212 * sr_dev_inst_free().
214 SR_API struct sr_dev_inst *sr_dev_inst_user_new(const char *vendor,
215 const char *model, const char *version)
217 struct sr_dev_inst *sdi;
219 sdi = g_malloc0(sizeof(struct sr_dev_inst));
221 sdi->vendor = g_strdup(vendor);
222 sdi->model = g_strdup(model);
223 sdi->version = g_strdup(version);
224 sdi->inst_type = SR_INST_USER;
230 * Add a new channel to the specified device instance.
232 SR_API int sr_dev_inst_channel_add(struct sr_dev_inst *sdi, int index, int type, const char *name)
234 if (!sdi || sdi->inst_type != SR_INST_USER || index < 0)
237 sr_channel_new(sdi, index, type, TRUE, name);
243 * Free device instance struct created by sr_dev_inst().
244 * @param sdi device instance to free.
246 SR_PRIV void sr_dev_inst_free(struct sr_dev_inst *sdi)
248 struct sr_channel *ch;
249 struct sr_channel_group *cg;
252 for (l = sdi->channels; l; l = l->next) {
258 g_slist_free(sdi->channels);
260 for (l = sdi->channel_groups; l; l = l->next) {
263 g_slist_free(cg->channels);
267 g_slist_free(sdi->channel_groups);
271 g_free(sdi->version);
272 g_free(sdi->serial_num);
273 g_free(sdi->connection_id);
277 #ifdef HAVE_LIBUSB_1_0
280 * Allocate and init struct for USB device instance.
281 * @param[in] bus @copydoc sr_usb_dev_inst::bus
282 * @param[in] address @copydoc sr_usb_dev_inst::address
283 * @param[in] hdl @copydoc sr_usb_dev_inst::devhdl
285 * @retval other struct sr_usb_dev_inst * for USB device instance.
287 SR_PRIV struct sr_usb_dev_inst *sr_usb_dev_inst_new(uint8_t bus,
288 uint8_t address, struct libusb_device_handle *hdl)
290 struct sr_usb_dev_inst *udi;
292 udi = g_malloc0(sizeof(struct sr_usb_dev_inst));
294 udi->address = address;
301 * Free struct * allocated by sr_usb_dev_inst().
302 * @param usb struct* to free. Must not be NULL.
304 SR_PRIV void sr_usb_dev_inst_free(struct sr_usb_dev_inst *usb)
311 #ifdef HAVE_LIBSERIALPORT
316 * Both parameters are copied to newly allocated strings, and freed
317 * automatically by sr_serial_dev_inst_free().
319 * @param[in] port OS-specific serial port specification. Examples:
320 * "/dev/ttyUSB0", "/dev/ttyACM1", "/dev/tty.Modem-0", "COM1".
322 * @param[in] serialcomm A serial communication parameters string, in the form
323 * of \<speed\>/\<data bits\>\<parity\>\<stopbits\>, for example
324 * "9600/8n1" or "600/7o2". This is an optional parameter;
325 * it may be filled in later. Can be NULL.
327 * @return A pointer to a newly initialized struct sr_serial_dev_inst,
330 SR_PRIV struct sr_serial_dev_inst *sr_serial_dev_inst_new(const char *port,
331 const char *serialcomm)
333 struct sr_serial_dev_inst *serial;
335 serial = g_malloc0(sizeof(struct sr_serial_dev_inst));
336 serial->port = g_strdup(port);
338 serial->serialcomm = g_strdup(serialcomm);
344 * Free struct sr_serial_dev_inst * allocated by sr_serial_dev_inst().
345 * @param serial struct sr_serial_dev_inst * to free. Must not be NULL.
347 SR_PRIV void sr_serial_dev_inst_free(struct sr_serial_dev_inst *serial)
349 g_free(serial->port);
350 g_free(serial->serialcomm);
356 SR_PRIV struct sr_usbtmc_dev_inst *sr_usbtmc_dev_inst_new(const char *device)
358 struct sr_usbtmc_dev_inst *usbtmc;
360 usbtmc = g_malloc0(sizeof(struct sr_usbtmc_dev_inst));
361 usbtmc->device = g_strdup(device);
368 SR_PRIV void sr_usbtmc_dev_inst_free(struct sr_usbtmc_dev_inst *usbtmc)
370 g_free(usbtmc->device);
375 * Get the list of devices/instances of the specified driver.
377 * @param driver The driver to use. Must not be NULL.
379 * @return The list of devices/instances of this driver, or NULL upon errors
380 * or if the list is empty.
384 SR_API GSList *sr_dev_list(const struct sr_dev_driver *driver)
386 if (driver && driver->dev_list)
387 return driver->dev_list();
393 * Clear the list of device instances a driver knows about.
395 * @param driver The driver to use. This must be a pointer to one of
396 * the entries returned by sr_driver_list(). Must not be NULL.
398 * @retval SR_OK Success
399 * @retval SR_ERR_ARG Invalid driver
403 SR_API int sr_dev_clear(const struct sr_dev_driver *driver)
408 sr_err("Invalid driver.");
412 if (driver->dev_clear)
413 ret = driver->dev_clear();
415 ret = std_dev_clear(driver, NULL);
421 * Open the specified device.
423 * @param sdi Device instance to use. Must not be NULL.
425 * @return SR_OK upon success, a negative error code upon errors.
429 SR_API int sr_dev_open(struct sr_dev_inst *sdi)
433 if (!sdi || !sdi->driver || !sdi->driver->dev_open)
436 ret = sdi->driver->dev_open(sdi);
442 * Close the specified device.
444 * @param sdi Device instance to use. Must not be NULL.
446 * @return SR_OK upon success, a negative error code upon errors.
450 SR_API int sr_dev_close(struct sr_dev_inst *sdi)
454 if (!sdi || !sdi->driver || !sdi->driver->dev_close)
457 ret = sdi->driver->dev_close(sdi);
463 * Queries a device instances' driver.
465 * @param sdi Device instance to use. Must not be NULL.
467 * @return The driver instance or NULL on error.
469 SR_API struct sr_dev_driver *sr_dev_inst_driver_get(const struct sr_dev_inst *sdi)
471 if (!sdi || !sdi->driver)
478 * Queries a device instances' vendor.
480 * @param sdi Device instance to use. Must not be NULL.
482 * @return The vendor string or NULL.
484 SR_API const char *sr_dev_inst_vendor_get(const struct sr_dev_inst *sdi)
493 * Queries a device instances' model.
495 * @param sdi Device instance to use. Must not be NULL.
497 * @return The model string or NULL.
499 SR_API const char *sr_dev_inst_model_get(const struct sr_dev_inst *sdi)
508 * Queries a device instances' version.
510 * @param sdi Device instance to use. Must not be NULL.
512 * @return The version string or NULL.
514 SR_API const char *sr_dev_inst_version_get(const struct sr_dev_inst *sdi)
523 * Queries a device instances' serial number.
525 * @param sdi Device instance to use. Must not be NULL.
527 * @return The serial number string or NULL.
529 SR_API const char *sr_dev_inst_sernum_get(const struct sr_dev_inst *sdi)
534 return sdi->serial_num;
538 * Queries a device instances' connection identifier.
540 * @param sdi Device instance to use. Must not be NULL.
542 * @return A copy of the connection id string or NULL. The caller is responsible
543 * for g_free()ing the string when it is no longer needed.
545 SR_API const char *sr_dev_inst_connid_get(const struct sr_dev_inst *sdi)
547 struct drv_context *drvc;
549 char connection_id[64];
551 #ifdef HAVE_LIBUSB_1_0
552 struct sr_usb_dev_inst *usb;
553 struct libusb_device **devlist;
554 struct libusb_device_descriptor des;
560 #ifdef HAVE_LIBSERIALPORT
561 struct sr_serial_dev_inst *serial;
563 if ((!sdi->connection_id) && (sdi->inst_type == SR_INST_SERIAL)) {
564 /* connection_id isn't populated, let's do that here. */
567 ((struct sr_dev_inst *)sdi)->connection_id = g_strdup(serial->port);
572 #ifdef HAVE_LIBUSB_1_0
573 if ((!sdi->connection_id) && (sdi->inst_type == SR_INST_USB)) {
574 /* connection_id isn't populated, let's do that here. */
576 drvc = sdi->driver->priv;
579 if ((cnt = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist)) < 0) {
580 sr_err("Failed to retrieve device list: %s.",
581 libusb_error_name(cnt));
585 for (i = 0; i < cnt; i++) {
586 if ((r = libusb_get_device_descriptor(devlist[i], &des)) < 0) {
587 sr_err("Failed to get device descriptor: %s.",
588 libusb_error_name(r));
592 /* Find the USB device by the logical address we know. */
593 b = libusb_get_bus_number(devlist[i]);
594 a = libusb_get_device_address(devlist[i]);
595 if (b != usb->bus || a != usb->address)
598 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
599 ((struct sr_dev_inst *)sdi)->connection_id = g_strdup(connection_id);
603 libusb_free_device_list(devlist, 1);
607 return sdi->connection_id;
611 * Queries a device instances' channel list.
613 * @param sdi Device instance to use. Must not be NULL.
615 * @return The GSList of channels or NULL.
617 SR_API GSList *sr_dev_inst_channels_get(const struct sr_dev_inst *sdi)
622 return sdi->channels;
626 * Queries a device instances' channel groups list.
628 * @param sdi Device instance to use. Must not be NULL.
630 * @return The GSList of channel groups or NULL.
632 SR_API GSList *sr_dev_inst_channel_groups_get(const struct sr_dev_inst *sdi)
637 return sdi->channel_groups;