libsigrok/device.c

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/*
* This file is part of the sigrok project.
*
* Copyright (C) 2010 Bert Vermeulen <bert@biot.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <glib.h>
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#include <sigrok.h>
extern struct sigrok_global *global;
GSList *devices = NULL;
void device_scan(void)
{
GSList *plugins, *l;
struct device_plugin *plugin;
int num_devices, i;
plugins = list_hwplugins();
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/*
* Initialize all plugins first. Since the init() call may involve
* a firmware upload and associated delay, we may as well get all
* of these out of the way first.
*/
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for (l = plugins; l; l = l->next) {
plugin = l->data;
g_message("initializing %s plugin", plugin->name);
num_devices = plugin->init(NULL);
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for (i = 0; i < num_devices; i++)
device_new(plugin, i);
}
}
void device_close_all(void)
{
struct device *device;
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while (devices) {
device = devices->data;
device->plugin->close(device->plugin_index);
device_destroy(device);
}
}
GSList *device_list(void)
{
return devices;
}
struct device *device_new(struct device_plugin *plugin, int plugin_index)
{
struct device *device;
int num_probes, i;
char probename[16];
device = g_malloc0(sizeof(struct device));
device->plugin = plugin;
device->plugin_index = plugin_index;
devices = g_slist_append(devices, device);
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num_probes = (int)device->plugin->get_device_info(device->plugin_index,
DI_NUM_PROBES);
for (i = 0; i < num_probes; i++) {
snprintf(probename, 16, "%d", i + 1);
device_probe_add(device, probename);
}
return device;
}
void device_clear(struct device *device)
{
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unsigned int pnum;
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/* TODO: Plugin-specific clear call? */
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if (!device->probes)
return;
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for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
device_probe_clear(device, pnum);
}
void device_destroy(struct device *device)
{
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unsigned int pnum;
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/*
* TODO: Plugin-specific destroy call, need to decrease refcount
* in plugin.
*/
devices = g_slist_remove(devices, device);
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if (device->probes) {
for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++)
device_probe_clear(device, pnum);
g_slist_free(device->probes);
}
g_free(device);
}
void device_probe_clear(struct device *device, int probenum)
{
struct probe *p;
p = probe_find(device, probenum);
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if (!p)
return;
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if (p->name) {
g_free(p->name);
p->name = NULL;
}
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if (p->trigger) {
g_free(p->trigger);
p->trigger = NULL;
}
}
void device_probe_add(struct device *device, char *name)
{
struct probe *p;
p = g_malloc0(sizeof(struct probe));
p->index = g_slist_length(device->probes) + 1;
p->enabled = TRUE;
p->name = g_strdup(name);
p->trigger = NULL;
device->probes = g_slist_append(device->probes, p);
}
struct probe *probe_find(struct device *device, int probenum)
{
GSList *l;
struct probe *p, *found_probe;
found_probe = NULL;
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for (l = device->probes; l; l = l->next) {
p = l->data;
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if (p->index == probenum) {
found_probe = p;
break;
}
}
return found_probe;
}
void device_probe_name(struct device *device, int probenum, char *name)
{
struct probe *p;
p = probe_find(device, probenum);
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if (!p)
return;
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if (p->name)
g_free(p->name);
p->name = g_strdup(name);
}
void device_trigger_clear(struct device *device)
{
struct probe *p;
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unsigned int pnum;
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if (!device->probes)
return;
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for (pnum = 1; pnum <= g_slist_length(device->probes); pnum++) {
p = probe_find(device, pnum);
if (p && p->trigger) {
g_free(p->trigger);
p->trigger = NULL;
}
}
}
void device_trigger_set(struct device *device, int probenum, char *trigger)
{
struct probe *p;
p = probe_find(device, probenum);
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if (!p)
return;
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if (p->trigger)
g_free(p->trigger);
p->trigger = g_strdup(trigger);
}