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().
57 * TODO: Should return int.
59 * TODO: Option to only scan for specific devices or device classes.
61 void sr_device_scan(void)
64 struct sr_device_plugin *plugin;
66 if (!(plugins = sr_list_hwplugins())) {
67 sr_err("dev: %s: no supported devices/hwplugins", __func__);
72 * Initialize all plugins first. Since the init() call may involve
73 * a firmware upload and associated delay, we may as well get all
74 * of these out of the way first.
76 for (l = plugins; l; l = l->next) {
78 /* TODO: Handle 'plugin' being NULL. */
79 sr_init_hwplugins(plugin);
84 * Return the list of logic analyzer devices libsigrok has detected.
86 * If the libsigrok-internal device list is empty, a scan for attached
87 * devices -- via a call to sr_device_scan() -- is performed first.
89 * TODO: Error handling?
91 * @return The list (GSList) of detected devices, or NULL if none were found.
93 GSList *sr_device_list(void)
102 * Create a new device.
104 * TODO: 'plugin' can be const.
105 * TODO: num_probes should be uint16_t.
106 * TODO: Should return int, so that we can return SR_OK, SR_ERR_* etc.
108 * It is the caller's responsibility to g_free() the allocated memory when
109 * no longer needed. TODO: Using which API function?
111 * @param plugin TODO.
112 * If 'plugin' is NULL, the created device is a "virtual" one.
113 * @param plugin_index TODO
114 * @param num_probes The number of probes (>= 1) this device has.
117 * @return Pointer to the newly allocated device, or NULL upon errors.
119 struct sr_device *sr_device_new(struct sr_device_plugin *plugin, int plugin_index,
122 struct sr_device *device;
126 sr_err("dev: %s: plugin was NULL", __func__);
127 return NULL; /* TODO: SR_ERR_ARG */
130 /* TODO: Check if plugin_index valid? */
132 /* TODO: Check if num_probes valid? */
134 if (!(device = g_try_malloc0(sizeof(struct sr_device)))) {
135 sr_err("dev: %s: device malloc failed", __func__);
139 device->plugin = plugin;
140 device->plugin_index = plugin_index;
141 devices = g_slist_append(devices, device);
143 for (i = 0; i < num_probes; i++)
144 sr_device_probe_add(device, NULL); /* TODO: Check return value. */
150 * Clear all probes of the specified device.
152 * This removes/clears the 'name' and 'trigger' fields of all probes of
155 * The order in which the probes are cleared is not specified. The caller
156 * should not assume or rely on a specific order.
158 * TODO: Should return int.
159 * TODO: Rename to sr_device_clear_probes() or sr_device_probe_clear_all().
161 * @param device The device whose probes to clear. Must not be NULL.
162 * Note: device->probes is allowed to be NULL (in that case,
163 * there are no probes, thus none have to be cleared).
165 void sr_device_clear(struct sr_device *device)
170 sr_err("dev: %s: device was NULL", __func__);
171 return; /* TODO: SR_ERR_ARG. */
174 /* Note: device->probes can be NULL, this is handled correctly. */
176 for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
177 sr_device_probe_clear(device, pnum);
179 /* TODO: return SR_OK; */
183 * Clear the specified probe in the specified device.
185 * The probe itself still exists afterwards, but its 'name' and 'trigger'
186 * fields are g_free()'d and set to NULL.
188 * TODO: Should return int.
190 * @param device The device in which the specified (to be cleared) probe
191 * resides. Must not be NULL.
192 * @param probenum The number of the probe to clear.
193 * Note that the probe numbers start at 1 (not 0!).
195 void sr_device_probe_clear(struct sr_device *device, int probenum)
200 sr_err("dev: %s: device was NULL", __func__);
201 return; /* TODO: SR_ERR_ARG. */
204 /* TODO: Sanity check on 'probenum'. */
206 if (!(p = sr_device_probe_find(device, probenum))) {
207 sr_err("dev: %s: probe %d not found", __func__, probenum);
208 return; /* TODO: SR_ERR*. */
211 /* If the probe has a name, remove it. */
217 /* If the probe has a trigger, remove it. */
223 /* TODO: return SR_OK; */
227 * Add a probe with the specified name to the specified device.
229 * The added probe is automatically enabled (the 'enabled' field is TRUE).
231 * The 'trigger' field of the added probe is set to NULL. A trigger can be
232 * added via sr_device_trigger_set().
234 * TODO: Should return int.
235 * TODO: Are duplicate names allowed?
236 * TODO: Do we enforce a maximum probe number for a device?
237 * TODO: Error if the max. probe number for the specific LA is reached, e.g.
238 * if the caller tries to add more probes than the device actually has.
240 * @param device The device to which to add a probe with the specified name.
242 * @param name The name of the probe to add to this device. Must not be NULL.
243 * TODO: Maximum length, allowed characters, etc.
245 * @return SR_OK upon success, SR_ERR_MALLOC upon memory allocation errors,
246 * or SR_ERR_ARG upon invalid arguments.
247 * If something other than SR_OK is returned, 'device' is unchanged.
249 void sr_device_probe_add(struct sr_device *device, const char *name)
252 char probename[16]; /* FIXME: Don't hardcode 16? #define? */
256 sr_err("dev: %s: device was NULL", __func__);
257 return; /* SR_ERR_ARG; */
261 sr_err("dev: %s: name was NULL", __func__);
262 return; /* SR_ERR_ARG; */
265 /* TODO: Further checks to ensure name is valid. */
267 probenum = g_slist_length(device->probes) + 1;
269 if (!(p = g_try_malloc0(sizeof(struct sr_probe)))) {
270 sr_err("dev: %s: p malloc failed", __func__);
271 return; /* SR_ERR_MALLOC; */
277 p->name = g_strdup(name);
279 snprintf(probename, 16, "%d", probenum);
280 p->name = g_strdup(probename);
283 device->probes = g_slist_append(device->probes, p);
289 * Find the probe with the specified number in the specified device.
293 * @param device TODO. Must not be NULL.
294 * @param probenum The number of the probe whose 'struct sr_probe' we want.
295 * Note that the probe numbers start at 1 (not 0!).
297 * TODO: Should return int.
298 * TODO: device can be const.
299 * TODO: probenum should be unsigned.
301 * @return A pointer to the requested probe's 'struct sr_probe', or NULL
302 * if the probe could not be found.
304 struct sr_probe *sr_device_probe_find(struct sr_device *device, int probenum)
307 struct sr_probe *p, *found_probe;
310 sr_err("dev: %s: device was NULL", __func__);
311 return NULL; /* TODO: SR_ERR_ARG */
314 /* TODO: Sanity check on probenum. */
317 for (l = device->probes; l; l = l->next) {
319 /* TODO: Check for p != NULL. */
320 if (p->index == probenum) {
330 * Set the name of the specified probe in the specified device.
332 * If the probe already has a different name assigned to it, it will be
333 * removed, and the new name will be saved instead.
335 * TODO: Should return int.
336 * TODO: device can be const?
337 * TODO: Rename to sr_device_set_probe_name().
340 * @param probenum The number of the probe whose name to set.
341 * Note that the probe numbers start at 1 (not 0!).
342 * @param name The new name that the specified probe should get.
344 void sr_device_probe_name(struct sr_device *device, int probenum,
350 sr_err("dev: %s: device was NULL", __func__);
351 return; /* TODO: SR_ERR_ARG */
354 p = sr_device_probe_find(device, probenum);
356 sr_err("dev: %s: probe %d not found", __func__, probenum);
357 return; /* TODO: SR_ERR*. */
360 /* TODO: Sanity check on 'name'. */
362 /* If the probe already has a name, kill it first. */
366 p->name = g_strdup(name);
370 * Remove all triggers set up for the specified device.
372 * TODO: Better description.
374 * TODO: Should return int.
375 * TODO: device can be const?
379 void sr_device_trigger_clear(struct sr_device *device)
382 unsigned int pnum; /* TODO: uint6_t? */
385 sr_err("dev: %s: device was NULL", __func__);
386 return; /* TODO: SR_ERR_ARG */
389 if (!device->probes) {
390 sr_err("dev: %s: device->probes was NULL", __func__);
391 return; /* TODO: SR_ERR*. */
394 for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++) {
395 p = sr_device_probe_find(device, pnum);
396 /* TODO: Silently ignore probes which cannot be found? */
397 if (p && p->trigger) {
405 * Add a trigger to the specified device.
407 * TODO: Better description.
408 * TODO: Describe valid format of the 'trigger' string.
410 * TODO: Should return int.
411 * TODO: device can be const?
413 * @param device TODO. Must not be NULL.
414 * @param probenum The number of the probe. TODO.
415 * Note that the probe numbers start at 1 (not 0!).
416 * @param trigger TODO.
417 * TODO: Is NULL allowed?
419 void sr_device_trigger_set(struct sr_device *device, int probenum,
425 sr_err("dev: %s: device was NULL", __func__);
426 return; /* TODO: SR_ERR_ARG */
429 /* TODO: Sanity check on 'probenum'. */
431 /* TODO: Sanity check on 'trigger'. */
433 p = sr_device_probe_find(device, probenum);
435 sr_err("dev: %s: probe %d not found", __func__, probenum);
436 return; /* TODO: SR_ERR*. */
439 /* If the probe already has a trigger, kill it first. */
443 p->trigger = g_strdup(trigger);
447 * Determine whether the specified device has the specified capability.
449 * TODO: Should return int?
450 * TODO: device can be const.
452 * @param device Pointer to the device to be checked. Must not be NULL.
453 * The device's 'plugin' field must not be NULL either.
454 * @param hwcap The capability that should be checked (whether it's supported
455 * by the specified device).
457 * @return TRUE, if the device has the specified capability, FALSE otherwise.
458 * FALSE is also returned upon invalid input parameters or other
461 gboolean sr_device_has_hwcap(struct sr_device *device, int hwcap)
463 int *capabilities, i;
466 sr_err("dev: %s: device was NULL", __func__);
467 return FALSE; /* TODO: SR_ERR_ARG. */
470 if (!device->plugin) {
471 sr_err("dev: %s: device->plugin was NULL", __func__);
472 return FALSE; /* TODO: SR_ERR_ARG. */
475 /* TODO: Sanity check on 'hwcap'. */
477 if (!(capabilities = device->plugin->get_capabilities())) {
478 sr_err("dev: %s: device has no capabilities", __func__);
479 return FALSE; /* TODO: SR_ERR*. */
482 for (i = 0; capabilities[i]; i++) {
483 if (capabilities[i] != hwcap)
485 sr_spew("dev: %s: found hwcap %d", __func__, hwcap);
489 sr_spew("dev: %s: hwcap %d not found", __func__, hwcap);