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+/*
+* Copyright (C) 2012 Invensense, Inc.
+*
+* 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.
+*/
+
+#ifndef ANDROID_SENSORS_H
+#define ANDROID_SENSORS_H
+
+#include <stdint.h>
+#include <errno.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include <linux/input.h>
+
+#include <hardware/hardware.h>
+#include <hardware/sensors.h>
+
+__BEGIN_DECLS
+
+/*****************************************************************************/
+
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+#endif
+
+enum {
+ ID_GY = 0,
+ ID_RG,
+ ID_A,
+ ID_M,
+ ID_O,
+ ID_RV,
+ ID_LA,
+ ID_GR,
+ ID_SO
+};
+
+/*****************************************************************************/
+
+/*
+ * The SENSORS Module
+ */
+
+/* ITG3500 */
+#define EVENT_TYPE_GYRO_X REL_X
+#define EVENT_TYPE_GYRO_Y REL_Y
+#define EVENT_TYPE_GYRO_Z REL_Z
+/* MPU6050 MPU9150 */
+#define EVENT_TYPE_IACCEL_X REL_RX
+#define EVENT_TYPE_IACCEL_Y REL_RY
+#define EVENT_TYPE_IACCEL_Z REL_RZ
+/* MPU6050 MPU9150 */
+#define EVENT_TYPE_ICOMPASS_X REL_X
+#define EVENT_TYPE_ICOMPASS_Y REL_Y
+#define EVENT_TYPE_ICOMPASS_Z REL_Z
+/* MPUxxxx */
+#define EVENT_TYPE_TIMESTAMP_HI REL_MISC
+#define EVENT_TYPE_TIMESTAMP_LO REL_WHEEL
+
+/* Accel BMA250 */
+#define EVENT_TYPE_ACCEL_X ABS_X
+#define EVENT_TYPE_ACCEL_Y ABS_Y
+#define EVENT_TYPE_ACCEL_Z ABS_Z
+#define LSG (1000.0f)
+
+// conversion of acceleration data to SI units (m/s^2)
+#define RANGE_A (4*GRAVITY_EARTH)
+#define RESOLUTION_A (GRAVITY_EARTH / LSG)
+#define CONVERT_A (GRAVITY_EARTH / LSG)
+#define CONVERT_A_X (CONVERT_A)
+#define CONVERT_A_Y (CONVERT_A)
+#define CONVERT_A_Z (CONVERT_A)
+
+/* Compass AKM8975 */
+#define EVENT_TYPE_MAGV_X ABS_RX
+#define EVENT_TYPE_MAGV_Y ABS_RY
+#define EVENT_TYPE_MAGV_Z ABS_RZ
+#define EVENT_TYPE_MAGV_STATUS ABS_RUDDER
+
+// conversion of magnetic data to uT units
+#define CONVERT_M (0.06f)
+
+__END_DECLS
+
+#endif // ANDROID_SENSORS_H