2 * This file is part of the sigrok project.
4 * Copyright (C) 2010 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 <sigrok-internal.h>
25 extern struct sr_global *global;
27 GSList *devices = NULL;
30 * Scan the system for attached logic analyzers / devices.
32 * This will try to autodetect all supported logic analyzer devices:
34 * - Those attached via USB (can be reliably detected via USB VID/PID).
36 * - Those using a (real or virtual) serial port (detected by sending
37 * device-specific commands to all OS-specific serial port devices such
38 * as /dev/ttyS*, /dev/ttyUSB*, /dev/ttyACM*, and others).
39 * The autodetection for this kind of devices can potentially be unreliable.
41 * Also, sending various bytes/commands to (all!) devices which happen to
42 * be attached to the system via a (real or virtual) serial port can be
43 * problematic. There is no way for libsigrok to know how unknown devices
44 * react to the bytes libsigrok sends. Potentially they could lead to the
45 * device getting into invalid/error states, losing/overwriting data, or...
47 * In addition to the detection, the devices that are found are also
48 * initialized automatically. On some devices, this involves a firmware upload,
49 * or other such measures.
51 * The order in which the system is scanned for devices is not specified. The
52 * caller should not assume or rely on any specific order.
54 * After the system has been scanned for devices, the list of detected (and
55 * supported) devices can be acquired via sr_device_list().
58 * TODO: Option to only scan for specific devices or device classes.
60 * @return SR_OK upon success, SR_ERR upon errors.
62 int sr_device_scan(void)
65 struct sr_device_plugin *plugin;
67 if (!(plugins = sr_list_hwplugins())) {
68 sr_err("dev: %s: no supported devices/hwplugins", __func__);
69 return SR_ERR; /* TODO: More specific error? */
73 * Initialize all plugins first. Since the init() call may involve
74 * a firmware upload and associated delay, we may as well get all
75 * of these out of the way first.
77 for (l = plugins; l; l = l->next) {
79 /* TODO: Handle 'plugin' being NULL. */
80 sr_init_hwplugins(plugin);
87 * Return the list of logic analyzer devices libsigrok has detected.
89 * If the libsigrok-internal device list is empty, a scan for attached
90 * devices -- via a call to sr_device_scan() -- is performed first.
92 * TODO: Error handling?
94 * @return The list (GSList) of detected devices, or NULL if none were found.
96 GSList *sr_device_list(void)
105 * Create a new device.
107 * TODO: 'plugin' can be const.
108 * TODO: num_probes should be uint16_t.
109 * TODO: Should return int, so that we can return SR_OK, SR_ERR_* etc.
111 * It is the caller's responsibility to g_free() the allocated memory when
112 * no longer needed. TODO: Using which API function?
114 * @param plugin TODO.
115 * If 'plugin' is NULL, the created device is a "virtual" one.
116 * @param plugin_index TODO
117 * @param num_probes The number of probes (>= 1) this device has.
120 * @return Pointer to the newly allocated device, or NULL upon errors.
122 struct sr_device *sr_device_new(struct sr_device_plugin *plugin, int plugin_index,
125 struct sr_device *device;
129 sr_err("dev: %s: plugin was NULL", __func__);
130 return NULL; /* TODO: SR_ERR_ARG */
133 /* TODO: Check if plugin_index valid? */
135 /* TODO: Check if num_probes valid? */
137 if (!(device = g_try_malloc0(sizeof(struct sr_device)))) {
138 sr_err("dev: %s: device malloc failed", __func__);
142 device->plugin = plugin;
143 device->plugin_index = plugin_index;
144 devices = g_slist_append(devices, device);
146 for (i = 0; i < num_probes; i++)
147 sr_device_probe_add(device, NULL); /* TODO: Check return value. */
153 * Clear all probes of the specified device.
155 * This removes/clears the 'name' and 'trigger' fields of all probes of
158 * The order in which the probes are cleared is not specified. The caller
159 * should not assume or rely on a specific order.
161 * TODO: Rename to sr_device_clear_probes() or sr_device_probe_clear_all().
163 * @param device The device whose probes to clear. Must not be NULL.
164 * Note: device->probes is allowed to be NULL (in that case,
165 * there are no probes, thus none have to be cleared).
167 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments.
168 * If something other than SR_OK is returned, 'device' is unchanged.
170 int sr_device_clear(struct sr_device *device)
175 sr_err("dev: %s: device was NULL", __func__);
179 /* Note: device->probes can be NULL, this is handled correctly. */
181 for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
182 sr_device_probe_clear(device, pnum);
188 * Clear the specified probe in the specified device.
190 * The probe itself still exists afterwards, but its 'name' and 'trigger'
191 * fields are g_free()'d and set to NULL.
193 * @param device The device in which the specified (to be cleared) probe
194 * resides. Must not be NULL.
195 * @param probenum The number of the probe to clear.
196 * Note that the probe numbers start at 1 (not 0!).
198 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or SR_ERR
200 * If something other than SR_OK is returned, 'device' is unchanged.
202 int sr_device_probe_clear(struct sr_device *device, int probenum)
207 sr_err("dev: %s: device was NULL", __func__);
211 /* TODO: Sanity check on 'probenum'. */
213 if (!(p = sr_device_probe_find(device, probenum))) {
214 sr_err("dev: %s: probe %d not found", __func__, probenum);
215 return SR_ERR; /* TODO: More specific error? */
218 /* If the probe has a name, remove it. */
224 /* If the probe has a trigger, remove it. */
234 * Add a probe with the specified name to the specified device.
236 * The added probe is automatically enabled (the 'enabled' field is TRUE).
238 * The 'trigger' field of the added probe is set to NULL. A trigger can be
239 * added via sr_device_trigger_set().
241 * TODO: Are duplicate names allowed?
242 * TODO: Do we enforce a maximum probe number for a device?
243 * TODO: Error if the max. probe number for the specific LA is reached, e.g.
244 * if the caller tries to add more probes than the device actually has.
246 * @param device The device to which to add a probe with the specified name.
248 * @param name The name of the probe to add to this device. Must not be NULL.
249 * TODO: Maximum length, allowed characters, etc.
251 * @return SR_OK upon success, SR_ERR_MALLOC upon memory allocation errors,
252 * or SR_ERR_ARG upon invalid arguments.
253 * If something other than SR_OK is returned, 'device' is unchanged.
255 int sr_device_probe_add(struct sr_device *device, const char *name)
258 char probename[16]; /* FIXME: Don't hardcode 16? #define? */
262 sr_err("dev: %s: device was NULL", __func__);
267 sr_err("dev: %s: name was NULL", __func__);
271 /* TODO: Further checks to ensure name is valid. */
273 probenum = g_slist_length(device->probes) + 1;
275 if (!(p = g_try_malloc0(sizeof(struct sr_probe)))) {
276 sr_err("dev: %s: p malloc failed", __func__);
277 return SR_ERR_MALLOC;
283 p->name = g_strdup(name);
285 snprintf(probename, 16, "%d", probenum);
286 p->name = g_strdup(probename);
289 device->probes = g_slist_append(device->probes, p);
295 * Find the probe with the specified number in the specified device.
299 * @param device TODO. Must not be NULL.
300 * @param probenum The number of the probe whose 'struct sr_probe' we want.
301 * Note that the probe numbers start at 1 (not 0!).
303 * TODO: Should return int.
304 * TODO: device can be const.
305 * TODO: probenum should be unsigned.
307 * @return A pointer to the requested probe's 'struct sr_probe', or NULL
308 * if the probe could not be found.
310 struct sr_probe *sr_device_probe_find(struct sr_device *device, int probenum)
313 struct sr_probe *p, *found_probe;
316 sr_err("dev: %s: device was NULL", __func__);
317 return NULL; /* TODO: SR_ERR_ARG */
320 /* TODO: Sanity check on probenum. */
323 for (l = device->probes; l; l = l->next) {
325 /* TODO: Check for p != NULL. */
326 if (p->index == probenum) {
336 * Set the name of the specified probe in the specified device.
338 * If the probe already has a different name assigned to it, it will be
339 * removed, and the new name will be saved instead.
341 * TODO: device can be const?
342 * TODO: Rename to sr_device_set_probe_name().
345 * @param probenum The number of the probe whose name to set.
346 * Note that the probe numbers start at 1 (not 0!).
347 * @param name The new name that the specified probe should get.
349 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or SR_ERR
351 * If something other than SR_OK is returned, 'device' is unchanged.
353 int sr_device_probe_name(struct sr_device *device, int probenum,
359 sr_err("dev: %s: device was NULL", __func__);
363 p = sr_device_probe_find(device, probenum);
365 sr_err("dev: %s: probe %d not found", __func__, probenum);
366 return SR_ERR; /* TODO: More specific error? */
369 /* TODO: Sanity check on 'name'. */
371 /* If the probe already has a name, kill it first. */
375 p->name = g_strdup(name);
381 * Remove all triggers set up for the specified device.
383 * TODO: Better description.
385 * TODO: device can be const?
389 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments.
390 * If something other than SR_OK is returned, 'device' is unchanged.
392 int sr_device_trigger_clear(struct sr_device *device)
395 unsigned int pnum; /* TODO: uint16_t? */
398 sr_err("dev: %s: device was NULL", __func__);
402 if (!device->probes) {
403 sr_err("dev: %s: device->probes was NULL", __func__);
407 for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++) {
408 p = sr_device_probe_find(device, pnum);
409 /* TODO: Silently ignore probes which cannot be found? */
410 if (p && p->trigger) {
420 * Add a trigger to the specified device.
422 * TODO: Better description.
423 * TODO: Describe valid format of the 'trigger' string.
425 * TODO: device can be const?
427 * @param device TODO. Must not be NULL.
428 * @param probenum The number of the probe. TODO.
429 * Note that the probe numbers start at 1 (not 0!).
430 * @param trigger TODO.
431 * TODO: Is NULL allowed?
433 * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or SR_ERR
435 * If something other than SR_OK is returned, 'device' is unchanged.
437 int sr_device_trigger_set(struct sr_device *device, int probenum,
443 sr_err("dev: %s: device was NULL", __func__);
447 /* TODO: Sanity check on 'probenum'. */
449 /* TODO: Sanity check on 'trigger'. */
451 p = sr_device_probe_find(device, probenum);
453 sr_err("dev: %s: probe %d not found", __func__, probenum);
454 return SR_ERR; /* TODO: More specific error? */
457 /* If the probe already has a trigger, kill it first. */
461 p->trigger = g_strdup(trigger);
467 * Determine whether the specified device has the specified capability.
469 * TODO: Should return int?
470 * TODO: device can be const.
472 * @param device Pointer to the device to be checked. Must not be NULL.
473 * The device's 'plugin' field must not be NULL either.
474 * @param hwcap The capability that should be checked (whether it's supported
475 * by the specified device).
477 * @return TRUE, if the device has the specified capability, FALSE otherwise.
478 * FALSE is also returned upon invalid input parameters or other
481 gboolean sr_device_has_hwcap(struct sr_device *device, int hwcap)
483 int *capabilities, i;
486 sr_err("dev: %s: device was NULL", __func__);
487 return FALSE; /* TODO: SR_ERR_ARG. */
490 if (!device->plugin) {
491 sr_err("dev: %s: device->plugin was NULL", __func__);
492 return FALSE; /* TODO: SR_ERR_ARG. */
495 /* TODO: Sanity check on 'hwcap'. */
497 if (!(capabilities = device->plugin->get_capabilities())) {
498 sr_err("dev: %s: device has no capabilities", __func__);
499 return FALSE; /* TODO: SR_ERR*. */
502 for (i = 0; capabilities[i]; i++) {
503 if (capabilities[i] != hwcap)
505 sr_spew("dev: %s: found hwcap %d", __func__, hwcap);
509 sr_spew("dev: %s: hwcap %d not found", __func__, hwcap);