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/*
* Copyright (C) 2013 Paul Kocialkowski <contact@paulk.fr>
*
* 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 <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include <fcntl.h>
#include <errno.h>
#include <math.h>
#include <sys/types.h>
#include <linux/ioctl.h>
#include <linux/input.h>
#include <hardware/sensors.h>
#include <hardware/hardware.h>
#define LOG_TAG "orientationd"
#include <utils/Log.h>
#include "orientationd.h"
float yas530_convert(int value)
{
return value / 1000.0f;
}
int yas530_get_data(struct orientationd_handlers *handlers,
struct orientationd_data *data)
{
struct input_event input_event;
int input_fd;
int rc;
if (handlers == NULL || data == NULL)
return -EINVAL;
input_fd = handlers->poll_fd;
if (input_fd < 0)
return -1;
do {
rc = read(input_fd, &input_event, sizeof(input_event));
if (rc < (int) sizeof(input_event))
break;
if (input_event.type == EV_ABS) {
switch (input_event.code) {
case ABS_X:
data->magnetic.x = yas530_convert(input_event.value);
break;
case ABS_Y:
data->magnetic.y = yas530_convert(input_event.value);
break;
case ABS_Z:
data->magnetic.z = yas530_convert(input_event.value);
break;
default:
continue;
}
}
} while (input_event.type != EV_SYN);
return 0;
}
struct orientationd_handlers yas530 = {
.input_name = "geomagnetic",
.handle = SENSOR_TYPE_MAGNETIC_FIELD,
.poll_fd = -1,
.get_data = yas530_get_data,
};
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