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/>.
23 #include <libsigrok/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.
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[in] channel The channel whose name to set.
79 * @param[in] name The new name that the specified channel should get. A
80 * copy of the string is made.
82 * @return SR_OK on success, or SR_ERR_ARG on invalid arguments.
86 SR_API int sr_dev_channel_name_set(struct sr_channel *channel,
90 sr_err("%s: channel was NULL", __func__);
94 g_free(channel->name);
95 channel->name = g_strdup(name);
100 * Enable or disable a channel.
102 * @param[in] channel The channel to enable or disable.
103 * @param[in] state TRUE to enable the channel, FALSE to disable.
105 * @return SR_OK on success or SR_ERR on failure. In case of invalid
106 * arguments, SR_ERR_ARG is returned and the channel enabled state
111 SR_API int sr_dev_channel_enable(struct sr_channel *channel,
115 gboolean was_enabled;
116 struct sr_dev_inst *sdi;
122 was_enabled = channel->enabled;
123 channel->enabled = state;
124 if (!state != !was_enabled && sdi->driver
125 && sdi->driver->config_channel_set) {
126 ret = sdi->driver->config_channel_set(
127 sdi, channel, SR_CHANNEL_SET_ENABLED);
128 /* Roll back change if it wasn't applicable. */
136 /* Returns the next enabled channel, wrapping around if necessary. */
137 SR_PRIV struct sr_channel *sr_next_enabled_channel(const struct sr_dev_inst *sdi,
138 struct sr_channel *cur_channel)
140 struct sr_channel *next_channel;
143 next_channel = cur_channel;
145 l = g_slist_find(sdi->channels, next_channel);
147 next_channel = l->next->data;
149 next_channel = sdi->channels->data;
150 } while (!next_channel->enabled);
156 * Determine whether the specified device instance has the specified
159 * @param sdi Pointer to the device instance to be checked. Must not be NULL.
160 * If the device's 'driver' field is NULL (virtual device), this
161 * function will always return FALSE (virtual devices don't have
162 * a hardware capabilities list).
163 * @param[in] key The option that should be checked for is supported by the
166 * @retval TRUE Device has the specified option
167 * @retval FALSE Device does not have the specified option, invalid input
168 * parameters or other error conditions.
172 SR_API gboolean sr_dev_has_option(const struct sr_dev_inst *sdi, int key)
179 if (!sdi || !sdi->driver || !sdi->driver->config_list)
182 if (sdi->driver->config_list(SR_CONF_DEVICE_OPTIONS,
183 &gvar, sdi, NULL) != SR_OK)
187 devopts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(int32_t));
188 for (i = 0; i < num_opts; i++) {
189 if ((devopts[i] & SR_CONF_MASK) == key) {
194 g_variant_unref(gvar);
200 * Allocate and init a new user-generated device instance.
202 * @param vendor Device vendor
203 * @param model Device model
204 * @param version Device version
206 * @retval struct sr_dev_inst *. Dynamically allocated, free using
207 * sr_dev_inst_free().
209 SR_API struct sr_dev_inst *sr_dev_inst_user_new(const char *vendor,
210 const char *model, const char *version)
212 struct sr_dev_inst *sdi;
214 sdi = g_malloc0(sizeof(struct sr_dev_inst));
216 sdi->vendor = g_strdup(vendor);
217 sdi->model = g_strdup(model);
218 sdi->version = g_strdup(version);
219 sdi->inst_type = SR_INST_USER;
225 * Add a new channel to the specified device instance.
227 SR_API int sr_dev_inst_channel_add(struct sr_dev_inst *sdi, int index, int type, const char *name)
229 if (!sdi || sdi->inst_type != SR_INST_USER || index < 0)
232 sr_channel_new(sdi, index, type, TRUE, name);
238 * Free device instance struct created by sr_dev_inst().
239 * @param sdi device instance to free.
241 SR_PRIV void sr_dev_inst_free(struct sr_dev_inst *sdi)
243 struct sr_channel *ch;
244 struct sr_channel_group *cg;
247 for (l = sdi->channels; l; l = l->next) {
253 g_slist_free(sdi->channels);
255 for (l = sdi->channel_groups; l; l = l->next) {
258 g_slist_free(cg->channels);
262 g_slist_free(sdi->channel_groups);
266 g_free(sdi->version);
267 g_free(sdi->serial_num);
268 g_free(sdi->connection_id);
272 #ifdef HAVE_LIBUSB_1_0
275 * Allocate and init struct for USB device instance.
276 * @param[in] bus @copydoc sr_usb_dev_inst::bus
277 * @param[in] address @copydoc sr_usb_dev_inst::address
278 * @param[in] hdl @copydoc sr_usb_dev_inst::devhdl
280 * @retval other struct sr_usb_dev_inst * for USB device instance.
282 SR_PRIV struct sr_usb_dev_inst *sr_usb_dev_inst_new(uint8_t bus,
283 uint8_t address, struct libusb_device_handle *hdl)
285 struct sr_usb_dev_inst *udi;
287 udi = g_malloc0(sizeof(struct sr_usb_dev_inst));
289 udi->address = address;
296 * Free struct * allocated by sr_usb_dev_inst().
297 * @param usb struct* to free. Must not be NULL.
299 SR_PRIV void sr_usb_dev_inst_free(struct sr_usb_dev_inst *usb)
306 #ifdef HAVE_LIBSERIALPORT
311 * Both parameters are copied to newly allocated strings, and freed
312 * automatically by sr_serial_dev_inst_free().
314 * @param[in] port OS-specific serial port specification. Examples:
315 * "/dev/ttyUSB0", "/dev/ttyACM1", "/dev/tty.Modem-0", "COM1".
317 * @param[in] serialcomm A serial communication parameters string, in the form
318 * of \<speed\>/\<data bits\>\<parity\>\<stopbits\>, for example
319 * "9600/8n1" or "600/7o2". This is an optional parameter;
320 * it may be filled in later. Can be NULL.
322 * @return A pointer to a newly initialized struct sr_serial_dev_inst,
325 SR_PRIV struct sr_serial_dev_inst *sr_serial_dev_inst_new(const char *port,
326 const char *serialcomm)
328 struct sr_serial_dev_inst *serial;
330 serial = g_malloc0(sizeof(struct sr_serial_dev_inst));
331 serial->port = g_strdup(port);
333 serial->serialcomm = g_strdup(serialcomm);
339 * Free struct sr_serial_dev_inst * allocated by sr_serial_dev_inst().
340 * @param serial struct sr_serial_dev_inst * to free. Must not be NULL.
342 SR_PRIV void sr_serial_dev_inst_free(struct sr_serial_dev_inst *serial)
344 g_free(serial->port);
345 g_free(serial->serialcomm);
351 SR_PRIV struct sr_usbtmc_dev_inst *sr_usbtmc_dev_inst_new(const char *device)
353 struct sr_usbtmc_dev_inst *usbtmc;
355 usbtmc = g_malloc0(sizeof(struct sr_usbtmc_dev_inst));
356 usbtmc->device = g_strdup(device);
363 SR_PRIV void sr_usbtmc_dev_inst_free(struct sr_usbtmc_dev_inst *usbtmc)
365 g_free(usbtmc->device);
370 * Get the list of devices/instances of the specified driver.
372 * @param driver The driver to use. Must not be NULL.
374 * @return The list of devices/instances of this driver, or NULL upon errors
375 * or if the list is empty.
379 SR_API GSList *sr_dev_list(const struct sr_dev_driver *driver)
381 if (driver && driver->dev_list)
382 return driver->dev_list(driver);
388 * Clear the list of device instances a driver knows about.
390 * @param driver The driver to use. This must be a pointer to one of
391 * the entries returned by sr_driver_list(). Must not be NULL.
393 * @retval SR_OK Success
394 * @retval SR_ERR_ARG Invalid driver
398 SR_API int sr_dev_clear(const struct sr_dev_driver *driver)
403 sr_err("Invalid driver.");
407 if (driver->dev_clear)
408 ret = driver->dev_clear(driver);
410 ret = std_dev_clear(driver, NULL);
416 * Open the specified device.
418 * @param sdi Device instance to use. Must not be NULL.
420 * @return SR_OK upon success, a negative error code upon errors.
424 SR_API int sr_dev_open(struct sr_dev_inst *sdi)
428 if (!sdi || !sdi->driver || !sdi->driver->dev_open)
431 ret = sdi->driver->dev_open(sdi);
437 * Close the specified device.
439 * @param sdi Device instance to use. Must not be NULL.
441 * @return SR_OK upon success, a negative error code upon errors.
445 SR_API int sr_dev_close(struct sr_dev_inst *sdi)
449 if (!sdi || !sdi->driver || !sdi->driver->dev_close)
452 ret = sdi->driver->dev_close(sdi);
458 * Queries a device instances' driver.
460 * @param sdi Device instance to use. Must not be NULL.
462 * @return The driver instance or NULL on error.
464 SR_API struct sr_dev_driver *sr_dev_inst_driver_get(const struct sr_dev_inst *sdi)
466 if (!sdi || !sdi->driver)
473 * Queries a device instances' vendor.
475 * @param sdi Device instance to use. Must not be NULL.
477 * @return The vendor string or NULL.
479 SR_API const char *sr_dev_inst_vendor_get(const struct sr_dev_inst *sdi)
488 * Queries a device instances' model.
490 * @param sdi Device instance to use. Must not be NULL.
492 * @return The model string or NULL.
494 SR_API const char *sr_dev_inst_model_get(const struct sr_dev_inst *sdi)
503 * Queries a device instances' version.
505 * @param sdi Device instance to use. Must not be NULL.
507 * @return The version string or NULL.
509 SR_API const char *sr_dev_inst_version_get(const struct sr_dev_inst *sdi)
518 * Queries a device instances' serial number.
520 * @param sdi Device instance to use. Must not be NULL.
522 * @return The serial number string or NULL.
524 SR_API const char *sr_dev_inst_sernum_get(const struct sr_dev_inst *sdi)
529 return sdi->serial_num;
533 * Queries a device instances' connection identifier.
535 * @param sdi Device instance to use. Must not be NULL.
537 * @return A copy of the connection id string or NULL. The caller is responsible
538 * for g_free()ing the string when it is no longer needed.
540 SR_API const char *sr_dev_inst_connid_get(const struct sr_dev_inst *sdi)
542 #ifdef HAVE_LIBUSB_1_0
543 struct drv_context *drvc;
545 char connection_id[64];
546 struct sr_usb_dev_inst *usb;
547 struct libusb_device **devlist;
553 #ifdef HAVE_LIBSERIALPORT
554 struct sr_serial_dev_inst *serial;
556 if ((!sdi->connection_id) && (sdi->inst_type == SR_INST_SERIAL)) {
557 /* connection_id isn't populated, let's do that here. */
560 ((struct sr_dev_inst *)sdi)->connection_id = g_strdup(serial->port);
564 #ifdef HAVE_LIBUSB_1_0
565 if ((!sdi->connection_id) && (sdi->inst_type == SR_INST_USB)) {
566 /* connection_id isn't populated, let's do that here. */
568 drvc = sdi->driver->context;
571 if ((cnt = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist)) < 0) {
572 sr_err("Failed to retrieve device list: %s.",
573 libusb_error_name(cnt));
577 for (i = 0; i < cnt; i++) {
578 /* Find the USB device by the logical address we know. */
579 b = libusb_get_bus_number(devlist[i]);
580 a = libusb_get_device_address(devlist[i]);
581 if (b != usb->bus || a != usb->address)
584 usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
585 ((struct sr_dev_inst *)sdi)->connection_id = g_strdup(connection_id);
589 libusb_free_device_list(devlist, 1);
593 return sdi->connection_id;
597 * Queries a device instances' channel list.
599 * @param sdi Device instance to use. Must not be NULL.
601 * @return The GSList of channels or NULL.
603 SR_API GSList *sr_dev_inst_channels_get(const struct sr_dev_inst *sdi)
608 return sdi->channels;
612 * Queries a device instances' channel groups list.
614 * @param sdi Device instance to use. Must not be NULL.
616 * @return The GSList of channel groups or NULL.
618 SR_API GSList *sr_dev_inst_channel_groups_get(const struct sr_dev_inst *sdi)
623 return sdi->channel_groups;