libsigrok/device.c

366 lines
8.6 KiB
C

/*
* This file is part of the sigrok project.
*
* Copyright (C) 2010-2012 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>
#include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
#include "libsigrok.h"
#include "libsigrok-internal.h"
/* Message logging helpers with driver-specific prefix string. */
#define DRIVER_LOG_DOMAIN "device: "
#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
/**
* @file
*
* Device handling in libsigrok.
*/
/**
* @defgroup grp_devices Devices
*
* Device handling in libsigrok.
*
* @{
*/
/** @private */
SR_PRIV struct sr_probe *sr_probe_new(int index, int type,
gboolean enabled, const char *name)
{
struct sr_probe *probe;
if (!(probe = g_try_malloc0(sizeof(struct sr_probe)))) {
sr_err("Probe malloc failed.");
return NULL;
}
probe->index = index;
probe->type = type;
probe->enabled = enabled;
if (name)
probe->name = g_strdup(name);
return probe;
}
/**
* Set the name of the specified probe in the specified device.
*
* If the probe already has a different name assigned to it, it will be
* removed, and the new name will be saved instead.
*
* @param sdi The device instance the probe is connected to.
* @param probenum The number of the probe whose name to set.
* Note that the probe numbers start at 0.
* @param name The new name that the specified probe should get. A copy
* of the string is made.
*
* @return SR_OK on success, or SR_ERR_ARG on invalid arguments.
*/
SR_API int sr_dev_probe_name_set(const struct sr_dev_inst *sdi,
int probenum, const char *name)
{
GSList *l;
struct sr_probe *probe;
int ret;
if (!sdi) {
sr_err("%s: sdi was NULL", __func__);
return SR_ERR_ARG;
}
ret = SR_ERR_ARG;
for (l = sdi->probes; l; l = l->next) {
probe = l->data;
if (probe->index == probenum) {
g_free(probe->name);
probe->name = g_strdup(name);
ret = SR_OK;
break;
}
}
return ret;
}
/**
* Enable or disable a probe on the specified device.
*
* @param sdi The device instance the probe is connected to.
* @param probenum The probe number, starting from 0.
* @param state TRUE to enable the probe, FALSE to disable.
*
* @return SR_OK on success, or SR_ERR_ARG on invalid arguments.
*/
SR_API int sr_dev_probe_enable(const struct sr_dev_inst *sdi, int probenum,
gboolean state)
{
GSList *l;
struct sr_probe *probe;
int ret;
if (!sdi)
return SR_ERR_ARG;
ret = SR_ERR_ARG;
for (l = sdi->probes; l; l = l->next) {
probe = l->data;
if (probe->index == probenum) {
probe->enabled = state;
ret = SR_OK;
break;
}
}
return ret;
}
/**
* Add a trigger to the specified device (and the specified probe).
*
* If the specified probe of this device already has a trigger, it will
* be silently replaced.
*
* @param sdi Must not be NULL.
* @param probenum The probe number, starting from 0.
* @param trigger Trigger string, in the format used by sigrok-cli
*
* @return SR_OK on success, or SR_ERR_ARG on invalid arguments.
*/
SR_API int sr_dev_trigger_set(const struct sr_dev_inst *sdi, int probenum,
const char *trigger)
{
GSList *l;
struct sr_probe *probe;
int ret;
if (!sdi)
return SR_ERR_ARG;
ret = SR_ERR_ARG;
for (l = sdi->probes; l; l = l->next) {
probe = l->data;
if (probe->index == probenum) {
/* If the probe already has a trigger, kill it first. */
g_free(probe->trigger);
probe->trigger = g_strdup(trigger);
ret = SR_OK;
break;
}
}
return ret;
}
/**
* Determine whether the specified device instance has the specified
* capability.
*
* @param sdi Pointer to the device instance to be checked. Must not be NULL.
* If the device's 'driver' field is NULL (virtual device), this
* function will always return FALSE (virtual devices don't have
* a hardware capabilities list).
* @param hwcap The capability that should be checked (whether it's supported
* by the specified device).
*
* @return TRUE if the device has the specified capability, FALSE otherwise.
* FALSE is also returned upon invalid input parameters or other
* error conditions.
*/
SR_API gboolean sr_dev_has_hwcap(const struct sr_dev_inst *sdi, int hwcap)
{
const int *hwcaps;
int i;
if (!sdi || !sdi->driver)
return FALSE;
if (sdi->driver->info_get(SR_DI_HWCAPS,
(const void **)&hwcaps, NULL) != SR_OK)
return FALSE;
for (i = 0; hwcaps[i]; i++) {
if (hwcaps[i] == hwcap)
return TRUE;
}
return FALSE;
}
/** @private */
SR_PRIV struct sr_dev_inst *sr_dev_inst_new(int index, int status,
const char *vendor, const char *model, const char *version)
{
struct sr_dev_inst *sdi;
if (!(sdi = g_try_malloc(sizeof(struct sr_dev_inst)))) {
sr_err("%s: sdi malloc failed", __func__);
return NULL;
}
sdi->driver = NULL;
sdi->index = index;
sdi->status = status;
sdi->inst_type = -1;
sdi->vendor = vendor ? g_strdup(vendor) : NULL;
sdi->model = model ? g_strdup(model) : NULL;
sdi->version = version ? g_strdup(version) : NULL;
sdi->probes = NULL;
sdi->priv = NULL;
return sdi;
}
/** @private */
SR_PRIV void sr_dev_inst_free(struct sr_dev_inst *sdi)
{
struct sr_probe *probe;
GSList *l;
for (l = sdi->probes; l; l = l->next) {
probe = l->data;
g_free(probe->name);
g_free(probe);
}
g_free(sdi->priv);
g_free(sdi->vendor);
g_free(sdi->model);
g_free(sdi->version);
g_free(sdi);
}
#ifdef HAVE_LIBUSB_1_0
/** @private */
SR_PRIV struct sr_usb_dev_inst *sr_usb_dev_inst_new(uint8_t bus,
uint8_t address, struct libusb_device_handle *hdl)
{
struct sr_usb_dev_inst *udi;
if (!(udi = g_try_malloc(sizeof(struct sr_usb_dev_inst)))) {
sr_err("%s: udi malloc failed", __func__);
return NULL;
}
udi->bus = bus;
udi->address = address;
udi->devhdl = hdl;
return udi;
}
/** @private */
SR_PRIV void sr_usb_dev_inst_free(struct sr_usb_dev_inst *usb)
{
(void)usb;
/* Nothing to do for this device instance type. */
}
#endif
/** @private
* @param pathname OS-specific serial port specification. Examples:
* "/dev/ttyUSB0", "/dev/ttyACM1", "/dev/tty.Modem-0", "COM1".
* @param serialcomm A serial communication parameters string, in the form
* of <speed>/<data bits><parity><stopbits>, for example "9600/8n1" or
* "600/7o2". This is an optional parameter; it may be filled in later.
* @return A pointer to a newly initialized struct sr_serial_dev_inst,
* or NULL on error.
*
* Both parameters are copied to newly allocated strings, and freed
* automatically by sr_serial_dev_inst_free().
*/
SR_PRIV struct sr_serial_dev_inst *sr_serial_dev_inst_new(const char *port,
const char *serialcomm)
{
struct sr_serial_dev_inst *serial;
if (!port) {
sr_err("hwdriver: serial port required");
return NULL;
}
if (!(serial = g_try_malloc0(sizeof(struct sr_serial_dev_inst)))) {
sr_err("hwdriver: serial malloc failed");
return NULL;
}
serial->port = g_strdup(port);
if (serialcomm)
serial->serialcomm = g_strdup(serialcomm);
serial->fd = -1;
return serial;
}
/** @private */
SR_PRIV void sr_serial_dev_inst_free(struct sr_serial_dev_inst *serial)
{
g_free(serial->port);
g_free(serial->serialcomm);
g_free(serial);
}
SR_API int sr_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
const void *value)
{
int ret;
if (!sdi || !sdi->driver || !sdi->driver->dev_config_set) {
sr_err("Unable to set config option.");
return SR_ERR;
}
ret = sdi->driver->dev_config_set(sdi, hwcap, value);
return ret;
}
SR_API GSList *sr_dev_inst_list(const struct sr_dev_driver *driver)
{
if (driver && driver->dev_list)
return driver->dev_list();
else
return NULL;
}
SR_API int sr_dev_inst_clear(const struct sr_dev_driver *driver)
{
if (driver && driver->dev_clear)
return driver->dev_clear();
else
return SR_OK;
}
/** @} */