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LibrePilot/flight/pios/common/pios_sensors.c

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/**
******************************************************************************
*
* @file pios_sensors.c
* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2014.
* @brief PiOS sensors handling
* --
* @see The GNU Public License (GPL) Version 3
*
*****************************************************************************/
/*
* 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, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pios_mem.h>
#include <pios_sensors.h>
#include <string.h>
// private variables
static PIOS_SENSORS_Instance *sensor_list = 0;
PIOS_SENSORS_Instance *PIOS_SENSORS_Register(const PIOS_SENSORS_Driver *driver, PIOS_SENSORS_TYPE type, uintptr_t context)
{
PIOS_SENSORS_Instance *instance = (PIOS_SENSORS_Instance *)pios_malloc(sizeof(PIOS_SENSORS_Instance));
instance->driver = driver;
instance->type = type;
instance->context = context;
instance->next = NULL;
LL_APPEND(sensor_list, instance);
return instance;
}
PIOS_SENSORS_Instance *PIOS_SENSORS_GetList()
{
return sensor_list;
}
PIOS_SENSORS_Instance *PIOS_SENSORS_GetInstanceByType(const PIOS_SENSORS_Instance *previous_instance, PIOS_SENSORS_TYPE type)
{
if (!previous_instance) {
previous_instance = sensor_list;
}
PIOS_SENSORS_Instance *sensor;
LL_FOREACH((PIOS_SENSORS_Instance *)previous_instance, sensor) {
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if (sensor->type & type) {
return sensor;
}
}
return NULL;
}