device.c

   1 /*
   2  * This file is part of the sigrok-cli project.
   3  *
   4  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   5  *
   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.
  10  *
  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.
  15  *
  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/>.
  18  */
  19
  20 #include <config.h>
  21 #include <glib.h>
  22 #include <string.h>
  23 #include "sigrok-cli.h"
  24
  25 static void free_drvopts(struct sr_config *src)
  26 {
  27         g_variant_unref(src->data);
  28         g_free(src);
  29 }
  30
  31 GSList *device_scan(void)
  32 {
  33         struct sr_dev_driver **drivers, *driver;
  34         GSList *drvopts, *devices, *tmpdevs, *l;
  35         int i;
  36
  37         if (opt_drv) {
  38                 /* Caller specified driver. Use it. Only this one. */
  39                 if (!parse_driver(opt_drv, &driver, &drvopts))
  40                         return NULL;
  41                 devices = sr_driver_scan(driver, drvopts);
  42                 g_slist_free_full(drvopts, (GDestroyNotify)free_drvopts);
  43         } else if (opt_dont_scan) {
  44                 /* No -d choice, and -D "don't scan" requested. Do nothing. */
  45                 devices = NULL;
  46         } else {
  47                 /* No driver specified. Scan all available drivers. */
  48                 devices = NULL;
  49                 drivers = sr_driver_list(sr_ctx);
  50                 for (i = 0; drivers[i]; i++) {
  51                         driver = drivers[i];
  52                         if (sr_driver_init(sr_ctx, driver) != SR_OK) {
  53                                 g_critical("Failed to initialize driver.");
  54                                 return NULL;
  55                         }
  56                         tmpdevs = sr_driver_scan(driver, NULL);
  57                         for (l = tmpdevs; l; l = l->next)
  58                                 devices = g_slist_append(devices, l->data);
  59                         g_slist_free(tmpdevs);
  60                 }
  61         }
  62
  63         return devices;
  64 }
  65
  66 /**
  67  * Lookup a channel group from its name.
  68  *
  69  * Uses the previously stored option value to lookup a channel group.
  70  * Returns a reference to the channel group when the lookup succeeded,
  71  * or #NULL after lookup failure, or #NULL for the global channel group
  72  * (the device's global parameters). Emits an error message when the
  73  * lookup failed while a channel group's name was specified.
  74  *
  75  * @param[in] sdi Device instance.
  76  *
  77  * @returns The channel group, or #NULL for failed lookup.
  78  */
  79 struct sr_channel_group *lookup_channel_group(struct sr_dev_inst *sdi)
  80 {
  81         struct sr_channel_group *cg;
  82         GSList *l, *channel_groups;
  83
  84         if (!opt_channel_group)
  85                 return NULL;
  86
  87         channel_groups = sr_dev_inst_channel_groups_get(sdi);
  88         if (!channel_groups) {
  89                 g_critical("This device does not have any channel groups.");
  90                 return NULL;
  91         }
  92
  93         for (l = channel_groups; l; l = l->next) {
  94                 cg = l->data;
  95                 if (g_ascii_strcasecmp(opt_channel_group, cg->name) != 0)
  96                         continue;
  97                 return cg;
  98         }
  99         g_critical("Invalid channel group '%s'", opt_channel_group);
 100
 101         return NULL;
 102 }