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/*
* Copyright (C) 2015 Intel Corp
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fcntl.h>
#include <errno.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <poll.h>
#include <unistd.h>
#include <dirent.h>
#include <sys/select.h>
#include <cutils/log.h>
#include <cutils/properties.h>
#include "TiltSensor.h"
TiltSensor::TiltSensor()
: SensorBase(NULL, "lis3dsh_acc"),
mEnabled(0),
mInputReader(4)
{
mPendingEvent.version = sizeof(sensors_event_t);
mPendingEvent.sensor = ID_T;
mPendingEvent.type = SENSOR_TYPE_WRIST_TILT_GESTURE;
memset(mPendingEvent.data, 0, sizeof(mPendingEvent.data));
}
TiltSensor::~TiltSensor() {
if (mEnabled) {
enable(0, 0);
}
}
int TiltSensor::enable(int32_t /* handle */, int en)
{
int ret = 0;
int flags = en ? 1 : 0;
char sysfs_path[SYSFS_MAX_PATH_LEN];
if (flags != mEnabled) {
int fd;
char buf[2];
snprintf(sysfs_path, SYSFS_MAX_PATH_LEN, "%s/%s", INPUT_SYSFS_BASE, ENABLE_DEVICE);
fd = open(sysfs_path, O_RDWR);
if (fd > 0) {
buf[1] = 0;
if (flags)
buf[0] = '1';
else
buf[0] = '0';
write(fd, buf, sizeof(buf));
close(fd);
} else {
ret = -1;
goto out;
}
snprintf(sysfs_path, SYSFS_MAX_PATH_LEN, "%s/%s", INPUT_SYSFS_BASE, ENABLE_INTERRUPT_OUTPUT);
fd = open(sysfs_path, O_RDWR);
if (fd > 0) {
buf[1] = 0;
if (flags)
buf[0] = '2'; /* 3: enable int1 and int2; 2: enable int1; 1: enable int2; 0: disbale */
else
buf[0] = '0';
write(fd, buf, sizeof(buf));
close(fd);
} else {
ret = -1;
goto out;
}
snprintf(sysfs_path, SYSFS_MAX_PATH_LEN, "%s/%s", INPUT_SYSFS_BASE, ENABLE_STATE_PROG);
fd = open(sysfs_path, O_RDWR);
if(fd > 0) {
buf[1] = 0;
if (flags)
buf[0] = '2'; /* 3: enable SM1 and SM2; 2: enable SM1; 1: enable SM2; 0: disbale */
else
buf[0] = '0';
write(fd, buf, sizeof(buf));
close(fd);
mEnabled = flags;
} else {
ret = -1;
}
}
out:
return ret;
}
int TiltSensor::isActivated(int /* handle */)
{
return mEnabled;
}
int TiltSensor::readEvents(sensors_event_t* data, int count)
{
if (count < 1)
return -EINVAL;
ssize_t n = mInputReader.fill(data_fd);
if (n < 0)
return n;
int numEventReceived = 0;
input_event const* event;
while (count && mInputReader.readEvent(&event)) {
int type = event->type;
if (type == EV_MSC) {
mPendingEvent.data[0] = 1.0f;
/*mPendingEvent.data[event->code] = event->value;*/
} else if (type == EV_SYN) {
mPendingEvent.timestamp = timevalToNano(event->time);
if (mEnabled) {
*data++ = mPendingEvent;
count--;
numEventReceived++;
}
} else {
ALOGE("TiltSensor: unknown event (type=%d, code=%d)",
type, event->code);
}
mInputReader.next();
}
return numEventReceived;
}
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