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/*
$License:
Copyright (C) 2010 InvenSense Corporation, All Rights Reserved.
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 2 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/>.
$
*/
/**
* @defgroup ACCELDL (Motion Library - Accelerometer Driver Layer)
* @brief Provides the interface to setup and handle an accelerometers
* connected to the secondary I2C interface of the gyroscope.
*
* @{
* @file adxl346.c
* @brief Accelerometer setup and handling methods for AD adxl346.
*/
/* ------------------ */
/* - Include Files. - */
/* ------------------ */
#ifdef __KERNEL__
#include <linux/module.h>
#endif
#include "mpu.h"
#include "mlsl.h"
#include "mlos.h"
#include <log.h>
#undef MPL_LOG_TAG
#define MPL_LOG_TAG "MPL-acc"
#define ACCEL_ADI346_SLEEP_REG (0x2D)
#define ACCEL_ADI346_SLEEP_MASK (0x04)
/* --------------------- */
/* - Variables. - */
/* --------------------- */
/*****************************************
Accelerometer Initialization Functions
*****************************************/
int adxl346_suspend(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result;
unsigned char reg;
result =
MLSLSerialRead(mlsl_handle, pdata->address,
ACCEL_ADI346_SLEEP_REG, 1, ®);
ERROR_CHECK(result);
reg |= ACCEL_ADI346_SLEEP_MASK;
result =
MLSLSerialWriteSingle(mlsl_handle, pdata->address,
ACCEL_ADI346_SLEEP_REG, reg);
ERROR_CHECK(result);
return result;
}
/* full scale setting - register & mask */
#define ACCEL_ADI346_CTRL_REG (0x31)
#define ACCEL_ADI346_CTRL_MASK (0x03)
int adxl346_resume(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata)
{
int result = ML_SUCCESS;
unsigned char reg;
result =
MLSLSerialRead(mlsl_handle, pdata->address,
ACCEL_ADI346_SLEEP_REG, 1, ®);
ERROR_CHECK(result);
reg &= ~ACCEL_ADI346_SLEEP_MASK;
/*wake up if sleeping */
result = MLSLSerialWriteSingle(mlsl_handle, pdata->address,
ACCEL_ADI346_SLEEP_REG, reg);
ERROR_CHECK(result);
/*MLOSSleep(10) */
/* Full Scale */
reg = 0x04;
reg &= ~ACCEL_ADI346_CTRL_MASK;
if (slave->range.mantissa == 4)
reg |= 0x1;
else if (slave->range.mantissa == 8)
reg |= 0x2;
else if (slave->range.mantissa == 16)
reg |= 0x3;
else {
slave->range.mantissa = 2;
reg |= 0x0;
}
slave->range.fraction = 0;
/* DATA_FORMAT: full resolution of +/-2g; data is left justified */
result = MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x31, reg);
ERROR_CHECK(result);
/* BW_RATE: normal power operation with output data rate of 200Hz */
result = MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x2C, 0x0B);
ERROR_CHECK(result);
/* POWER_CTL: power on in measurement mode */
result = MLSLSerialWriteSingle(mlsl_handle, pdata->address, 0x2D, 0x28);
ERROR_CHECK(result);
/*--- after wake up, it takes at least [1/(data rate) + 1.1]ms ==>
6.1ms to get valid sensor data ---*/
MLOSSleep(10);
return result;
}
int adxl346_read(void *mlsl_handle,
struct ext_slave_descr *slave,
struct ext_slave_platform_data *pdata,
unsigned char *data)
{
int result;
result = MLSLSerialRead(mlsl_handle, pdata->address,
slave->reg, slave->len, data);
return result;
}
struct ext_slave_descr adxl346_descr = {
/*.init = */ NULL,
/*.exit = */ NULL,
/*.suspend = */ adxl346_suspend,
/*.resume = */ adxl346_resume,
/*.read = */ adxl346_read,
/*.config = */ NULL,
/*.get_config = */ NULL,
/*.name = */ "adx1346",
/*.type = */ EXT_SLAVE_TYPE_ACCELEROMETER,
/*.id = */ ACCEL_ID_ADI346,
/*.reg = */ 0x32,
/*.len = */ 6,
/*.endian = */ EXT_SLAVE_LITTLE_ENDIAN,
/*.range = */ {2, 0},
};
struct ext_slave_descr *adxl346_get_slave_descr(void)
{
return &adxl346_descr;
}
EXPORT_SYMBOL(adxl346_get_slave_descr);
/**
* @}
**/
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