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110 lines
2.9 KiB
C++
110 lines
2.9 KiB
C++
/****************************************************************************
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*
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* Copyright (c) 2012-2014 PX4 Development Team. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/**
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* @file device.cpp
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*
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* Fundamental driver base class for the virtual device framework.
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*/
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#include "device.h"
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#include <px4_defines.h>
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#include <px4_posix.h>
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#include <drivers/drv_device.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/stat.h>
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namespace device
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{
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Device::Device(const char *name) :
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// public
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// protected
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_name(name),
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_debug_enabled(false)
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{
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int ret = px4_sem_init(&_lock, 0, 1);
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if (ret != 0) {
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PX4_WARN("SEM INIT FAIL: ret %d, %s", ret, strerror(errno));
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}
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/* setup a default device ID. When bus_type is UNKNOWN the
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other fields are invalid */
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_device_id.devid = 0;
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_device_id.devid_s.bus_type = DeviceBusType_UNKNOWN;
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_device_id.devid_s.bus = 0;
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_device_id.devid_s.address = 0;
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_device_id.devid_s.devtype = 0;
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}
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Device::~Device()
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{
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px4_sem_destroy(&_lock);
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}
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int
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Device::init()
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{
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int ret = OK;
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return ret;
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}
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int
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Device::dev_read(unsigned offset, void *data, unsigned count)
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{
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return -ENODEV;
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}
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int
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Device::dev_write(unsigned offset, void *data, unsigned count)
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{
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return -ENODEV;
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}
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int
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Device::dev_ioctl(unsigned operation, unsigned &arg)
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{
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switch (operation) {
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case DEVIOCGDEVICEID:
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return (int)_device_id.devid;
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}
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return -ENODEV;
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}
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} // namespace device
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