File content as of revision 5:8bab0f419849:

/**
 ******************************************************************************
 * @file    lis3mdl_class.cpp
 * @author  AST / EST
 * @version V0.0.1
 * @date    14-April-2015
 * @brief   Implementation file for the LIS3MDL driver class
 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *   1. Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *   2. 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.
 *   3. Neither the name of STMicroelectronics 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.
 *
 ******************************************************************************
*/

/* Includes ------------------------------------------------------------------*/
#include "mbed.h"
#include "lis3mdl_class.h"
#include "lis3mdl.h"
#include "../../x_nucleo_iks01a1_targets.h"

/* Methods -------------------------------------------------------------------*/
/* betzw - based on:
           X-CUBE-MEMS1/trunk/Drivers/BSP/Components/lis3mdl/lis3mdl.c: revision #184,
           X-CUBE-MEMS1/trunk: revision #293
*/
/**
 * @brief  Set LIS3MDL Initialization
 * @param  LIS3MDL_Init the configuration setting for the LIS3MDL
 * @retval MAGNETO_OK in case of success, an error code otherwise
 */
MAGNETO_StatusTypeDef LIS3MDL::LIS3MDL_Init(MAGNETO_InitTypeDef *LIS3MDL_Init)
{
    uint8_t tmp1 = 0x00;

    /* Configure the low level interface ---------------------------------------*/
    if(LIS3MDL_IO_Init() != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }

    /****** Magnetic sensor *******/

    if(LIS3MDL_IO_Read(&tmp1, LIS3MDL_M_CTRL_REG3_M, 1) != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }

    /* Conversion mode selection */
    tmp1 &= ~(LIS3MDL_M_MD_MASK);
    tmp1 |= LIS3MDL_Init->M_OperatingMode;

    if(LIS3MDL_IO_Write(&tmp1, LIS3MDL_M_CTRL_REG3_M, 1) != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }

    if(LIS3MDL_IO_Read(&tmp1, LIS3MDL_M_CTRL_REG1_M, 1) != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }

    /* Output data rate selection */
    tmp1 &= ~(LIS3MDL_M_DO_MASK);
    tmp1 |= LIS3MDL_Init->M_OutputDataRate;

    /* X and Y axes Operative mode selection */
    tmp1 &= ~(LIS3MDL_M_OM_MASK);
    tmp1 |= LIS3MDL_Init->M_XYOperativeMode;

    if(LIS3MDL_IO_Write(&tmp1, LIS3MDL_M_CTRL_REG1_M, 1) != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }

    if(LIS3MDL_IO_Read(&tmp1, LIS3MDL_M_CTRL_REG2_M, 1) != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }

    /* Full scale selection */
    tmp1 &= ~(LIS3MDL_M_FS_MASK);
    tmp1 |= LIS3MDL_Init->M_FullScale;

    if(LIS3MDL_IO_Write(&tmp1, LIS3MDL_M_CTRL_REG2_M, 1) != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }
    
    /* Configure interrupt lines */
    LIS3MDL_IO_ITConfig();
    
    return MAGNETO_OK;

    /******************************/
}


/**
 * @brief  Read ID of LIS3MDL Magnetic sensor
 * @param  m_id the pointer where the ID of the device is stored
 * @retval MAGNETO_OK in case of success, an error code otherwise
 */
MAGNETO_StatusTypeDef LIS3MDL::LIS3MDL_Read_M_ID(uint8_t *m_id)
{
    if(!m_id)
    { 
      return MAGNETO_ERROR; 
    }

    return LIS3MDL_IO_Read(m_id, LIS3MDL_M_WHO_AM_I_ADDR, 1);
}


/**
 * @brief  Read raw data from LIS3MDL Magnetic sensor output register
 * @param  pData the pointer where the magnetometer raw data are stored
 * @retval MAGNETO_OK in case of success, an error code otherwise
 */
MAGNETO_StatusTypeDef LIS3MDL::LIS3MDL_M_GetAxesRaw(int16_t *pData)
{
    uint8_t tempReg[2] = {0,0};

    if(LIS3MDL_IO_Read(&tempReg[0], (LIS3MDL_M_OUT_X_L_M | LIS3MDL_I2C_MULTIPLEBYTE_CMD), 2) != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }

    pData[0] = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);

    if(LIS3MDL_IO_Read(&tempReg[0], (LIS3MDL_M_OUT_Y_L_M | LIS3MDL_I2C_MULTIPLEBYTE_CMD), 2) != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }

    pData[1] = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);

    if(LIS3MDL_IO_Read(&tempReg[0], (LIS3MDL_M_OUT_Z_L_M | LIS3MDL_I2C_MULTIPLEBYTE_CMD), 2) != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }

    pData[2] = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
    
    return MAGNETO_OK;
}


/**
 * @brief Read data from LIS3MDL Magnetic sensor and calculate Magnetic in mgauss
 * @param pData the pointer where the magnetometer data are stored
 * @retval MAGNETO_OK in case of success, an error code otherwise
 */
MAGNETO_StatusTypeDef LIS3MDL::LIS3MDL_M_GetAxes(int32_t *pData)
{
    uint8_t tempReg = 0x00;
    int16_t pDataRaw[3];
    float sensitivity = 0;

    if(LIS3MDL_M_GetAxesRaw(pDataRaw) != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }

    if(LIS3MDL_IO_Read(&tempReg, LIS3MDL_M_CTRL_REG2_M, 1) != MAGNETO_OK)
    {
      return MAGNETO_ERROR;
    }

    tempReg &= LIS3MDL_M_FS_MASK;

    switch(tempReg)
    {
      case LIS3MDL_M_FS_4:
        sensitivity = 0.14;
        break;
      case LIS3MDL_M_FS_8:
        sensitivity = 0.29;
        break;
      case LIS3MDL_M_FS_12:
        sensitivity = 0.43;
        break;
      case LIS3MDL_M_FS_16:
        sensitivity = 0.58;
        break;
    }

    pData[0] = (int32_t)(pDataRaw[0] * sensitivity);
    pData[1] = (int32_t)(pDataRaw[1] * sensitivity);
    pData[2] = (int32_t)(pDataRaw[2] * sensitivity);
    
    return MAGNETO_OK;
}