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/*
* Copyright (c) 2015, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdint.h>
#include <stdbool.h>
#include "board.h"
#include "debug_console_imx.h"
#include "i2c_xfer.h"
#include "mma8451q.h"
static uint8_t mma8451qMode;
/*FUNCTION****************************************************************
*
* Function Name : MMA8451Q_Init
* Returned Value : true or false
* Comments : Initialize MMA8451Q 3-axis accelerometer sensor.
*
*END*********************************************************************/
bool MMA8451Q_Init(void)
{
uint8_t txBuffer;
uint8_t rxBuffer;
uint8_t cmdBuffer[3];
/* Place the MMA8451Q in Standby */
PRINTF("Place the MMA8451Q in standby mode... ");
cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1;
cmdBuffer[1] = MMA8451Q_CTRL_REG1;
txBuffer = 0x00;
if (!I2C_XFER_SendDataBlocking(cmdBuffer, 2, &txBuffer, 1))
{
PRINTF("ERROR\n\r");
return false;
}
PRINTF("OK\n\r");
// write 0000 0000= 0x00 to MMA8451Q_XYZ_DATA_CFG register
// [7]: reserved
// [6]: reserved
// [5]: reserved
// [4]: hpf_out=0
// [3]: reserved
// [2]: reserved
// [1-0]: fs=00 for 2g mode.
PRINTF("Set the mode: 2G ... ");
cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1;
cmdBuffer[1] = MMA8451Q_XYZ_DATA_CFG;
txBuffer = 0x00;
if (!I2C_XFER_SendDataBlocking(cmdBuffer, 2, &txBuffer, 1))
{
PRINTF("ERROR\n\r");
return false;
}
mma8451qMode = 0U;
PRINTF("OK\n\r");
// write 0000 0001 = 0x01 to MMA8451Q_CTRL_REG1
// [7-6]: aslp_rate=00
// [5-3]: dr=000
// [2]: lnoise=0
// [1]: f_read=0 for normal read mode
// [0]: active=1 to take the part out of standby and enable sampling
PRINTF("Fast read clear and active mode ... ");
cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1;
cmdBuffer[1] = MMA8451Q_CTRL_REG1;
txBuffer = 0x01;
if (!I2C_XFER_SendDataBlocking(cmdBuffer, 2, &txBuffer, 1))
{
PRINTF("ERROR\n\r");
return false;
}
PRINTF("OK\n\r");
// read WHO_AM_I device register, 0x1A
PRINTF("Test WHO_AM_I check... ");
cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1;
cmdBuffer[1] = MMA8451Q_WHO_AM_I;
cmdBuffer[2] = (BOARD_I2C_MMA8451Q_ADDR << 1) + 1;
if (!I2C_XFER_ReceiveDataBlocking(cmdBuffer, 3, &rxBuffer, 1))
{
PRINTF("ERROR\n\r");
return false;
}
if(rxBuffer == MMA8451Q_DEVICE_ID)
PRINTF("OK\n\r");
else
{
PRINTF("ERROR\n\r");
return false;
}
return true;
}
/*FUNCTION****************************************************************
*
* Function Name : MMA8451Q_ReadData
* Returned Value : true or false
* Comments : Get current acceleration from MMA8451Q.
*
*END*********************************************************************/
bool MMA8451Q_ReadData(int16_t *x, int16_t *y, int16_t *z)
{
uint8_t rxBuffer[7];
uint8_t cmdBuffer[3];
cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1;
cmdBuffer[1] = MMA8451Q_OUT_X_MSB;
cmdBuffer[2] = (BOARD_I2C_MMA8451Q_ADDR << 1) + 1;
if (!I2C_XFER_ReceiveDataBlocking(cmdBuffer, 3, rxBuffer, 7))
return false;
*x = ((rxBuffer[0] << 8) & 0xff00) | rxBuffer[1];
*y = ((rxBuffer[2] << 8) & 0xff00) | rxBuffer[3];
*z = ((rxBuffer[4] << 8) & 0xff00) | rxBuffer[5];
*x = (int16_t)(*x) >> 2;
*y = (int16_t)(*y) >> 2;
*z = (int16_t)(*z) >> 2;
if(mma8451qMode == mma8451qMode_4G)
{
(*x) = (*x) << 1;
(*y) = (*y) << 1;
(*z) = (*z) << 1;
}
else if(mma8451qMode == mma8451qMode_8G)
{
(*x) = (*x) << 2;
(*y) = (*y) << 2;
(*z) = (*z) << 2;
}
return true;
}
/*FUNCTION****************************************************************
*
* Function Name : MMA8451Q_ChangeMode
* Returned Value : true or false
* Comments : Change the current mode.
*
*END*********************************************************************/
bool MMA8451Q_ChangeMode(uint8_t mode)
{
uint8_t txBuffer;
uint8_t cmdBuffer[2];
cmdBuffer[0] = BOARD_I2C_MMA8451Q_ADDR << 1;
cmdBuffer[1] = MMA8451Q_XYZ_DATA_CFG;
txBuffer = mode;
if (!I2C_XFER_SendDataBlocking(cmdBuffer, 2, &txBuffer, 1))
return false;
return true;
}
/*******************************************************************************
* EOF
******************************************************************************/
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