mirror of https://github.com/rusefi/ChibiOS.git
484 lines
18 KiB
C
484 lines
18 KiB
C
/*
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ChibiOS - Copyright (C) 2016 Rocco Marco Guglielmi
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This file is part of ChibiOS.
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ChibiOS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file lis3mdl.c
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* @brief LIS3MDL MEMS interface module code.
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*
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* @addtogroup lis3mdl
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* @{
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*/
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#include "hal.h"
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#include "lis3mdl.h"
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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#define LIS3MDL_SENS_4GA ((float)6842.0f)
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#define LIS3MDL_SENS_8GA ((float)3421.0f)
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#define LIS3MDL_SENS_12GA ((float)2281.0f)
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#define LIS3MDL_SENS_16GA ((float)1711.0f)
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#define LIS3MDL_TEMP_SENS ((float)8.0f)
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#define LIS3MDL_DI ((uint8_t)0xFF)
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#define LIS3MDL_DI_0 ((uint8_t)0x01)
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#define LIS3MDL_DI_1 ((uint8_t)0x02)
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#define LIS3MDL_DI_2 ((uint8_t)0x04)
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#define LIS3MDL_DI_3 ((uint8_t)0x08)
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#define LIS3MDL_DI_4 ((uint8_t)0x10)
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#define LIS3MDL_DI_5 ((uint8_t)0x20)
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#define LIS3MDL_DI_6 ((uint8_t)0x40)
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#define LIS3MDL_DI_7 ((uint8_t)0x80)
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#define LIS3MDL_AD ((uint8_t)0x3F)
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#define LIS3MDL_AD_0 ((uint8_t)0x01)
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#define LIS3MDL_AD_1 ((uint8_t)0x02)
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#define LIS3MDL_AD_2 ((uint8_t)0x04)
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#define LIS3MDL_AD_3 ((uint8_t)0x08)
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#define LIS3MDL_AD_4 ((uint8_t)0x10)
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#define LIS3MDL_AD_5 ((uint8_t)0x20)
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#define LIS3MDL_AD_6 ((uint8_t)0x40)
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#define LIS3MDL_RW ((uint8_t)0x80)
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#define LIS3MDL_AD_WHO_AM_I ((uint8_t)0x0F)
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#define LIS3MDL_AD_CTRL_REG1 ((uint8_t)0x20)
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#define LIS3MDL_AD_CTRL_REG2 ((uint8_t)0x21)
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#define LIS3MDL_AD_CTRL_REG3 ((uint8_t)0x22)
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#define LIS3MDL_AD_CTRL_REG4 ((uint8_t)0x23)
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#define LIS3MDL_AD_CTRL_REG5 ((uint8_t)0x24)
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#define LIS3MDL_AD_STATUS_REG ((uint8_t)0x27)
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#define LIS3MDL_AD_OUT_X_L ((uint8_t)0x28)
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#define LIS3MDL_AD_OUT_X_H ((uint8_t)0x29)
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#define LIS3MDL_AD_OUT_Y_L ((uint8_t)0x2A)
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#define LIS3MDL_AD_OUT_Y_H ((uint8_t)0x2B)
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#define LIS3MDL_AD_OUT_Z_L ((uint8_t)0x2C)
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#define LIS3MDL_AD_OUT_Z_H ((uint8_t)0x2D)
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#define LIS3MDL_AD_TEMP_OUT_L ((uint8_t)0x2E)
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#define LIS3MDL_AD_TEMP_OUT_H ((uint8_t)0x2F)
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#define LIS3MDL_AD_INT_CFG ((uint8_t)0x30)
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#define LIS3MDL_AD_INT_SOURCE ((uint8_t)0x31)
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#define LIS3MDL_AD_INT_THS_L ((uint8_t)0x32)
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#define LIS3MDL_AD_INT_THS_H ((uint8_t)0x33)
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#define LIS3MDL_CTRL_REG2_FS_MASK ((uint8_t)0x60)
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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#if (LIS3MDL_USE_I2C) || defined(__DOXYGEN__)
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/**
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* @brief Reads registers value using I2C.
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* @pre The I2C interface must be initialized and the driver started.
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*
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* @param[in] i2cp pointer to the I2C interface
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* @param[in] sad slave address without R bit
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* @param[in] reg first sub-register address
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* @return the read value.
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*/
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uint8_t lis3mdlI2CReadRegister(I2CDriver *i2cp, lis3mdl_sad_t sad, uint8_t reg,
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msg_t* msgp) {
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msg_t msg;
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#if defined(STM32F103_MCUCONF)
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uint8_t rxbuf[2];
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msg = i2cMasterTransmitTimeout(i2cp, sad, &txbuf, 1, rxbuf, 2,
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TIME_INFINITE);
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if(msgp != NULL){
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*msgp = msg;
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}
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return rxbuf[0];
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#else
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uint8_t txbuf, rxbuf;
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txbuf = reg;
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msg = i2cMasterTransmitTimeout(i2cp, sad, &txbuf, 1, &rxbuf, 1,
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TIME_INFINITE);
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if(msgp != NULL){
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*msgp = msg;
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}
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return rxbuf;
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#endif
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}
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/**
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* @brief Writes a value into a register using I2C.
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* @pre The I2C interface must be initialized and the driver started.
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*
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* @param[in] i2cp pointer to the I2C interface
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* @param[in] sad slave address without R bit
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* @param[in] sub sub-register address
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* @param[in] value the value to be written
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* @return the operation status.
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*/
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msg_t lis3mdlI2CWriteRegister(I2CDriver *i2cp, lis3mdl_sad_t sad, uint8_t reg,
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uint8_t value) {
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uint8_t rxbuf;
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uint8_t txbuf[2];
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switch (reg) {
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default:
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/* Reserved register must not be written, according to the datasheet
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* this could permanently damage the device.
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*/
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chDbgAssert(FALSE, "lis3mdlI2CWriteRegister(), reserved register");
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case LIS3MDL_AD_WHO_AM_I:
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case LIS3MDL_AD_STATUS_REG:
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case LIS3MDL_AD_OUT_X_L:
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case LIS3MDL_AD_OUT_X_H:
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case LIS3MDL_AD_OUT_Y_L:
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case LIS3MDL_AD_OUT_Y_H:
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case LIS3MDL_AD_OUT_Z_L:
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case LIS3MDL_AD_OUT_Z_H:
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case LIS3MDL_AD_TEMP_OUT_L:
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case LIS3MDL_AD_TEMP_OUT_H:
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case LIS3MDL_AD_INT_SOURCE:
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case LIS3MDL_AD_INT_THS_L:
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case LIS3MDL_AD_INT_THS_H:
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/* Read only registers cannot be written, the command is ignored.*/
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return MSG_RESET;
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case LIS3MDL_AD_CTRL_REG1:
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case LIS3MDL_AD_CTRL_REG2:
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case LIS3MDL_AD_CTRL_REG3:
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case LIS3MDL_AD_CTRL_REG4:
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case LIS3MDL_AD_CTRL_REG5:
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case LIS3MDL_AD_INT_CFG:
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txbuf[0] = reg;
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txbuf[1] = value;
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return i2cMasterTransmitTimeout(i2cp, sad, txbuf, 2, &rxbuf, 0, TIME_INFINITE);
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break;
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}
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}
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#endif /* LIS3MDL_USE_I2C */
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/*
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* Interface implementation.
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*/
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static size_t get_axes_number(void *ip) {
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osalDbgCheck(ip != NULL);
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return LIS3MDL_NUMBER_OF_AXES;
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}
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static msg_t read_raw(void *ip, int32_t axes[LIS3MDL_NUMBER_OF_AXES]) {
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uint16_t tmp;
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osalDbgCheck((ip != NULL) && (axes != NULL));
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osalDbgAssert((((LIS3MDLDriver *)ip)->state == LIS3MDL_READY),
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"read_raw(), invalid state");
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#if LIS3MDL_USE_I2C
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osalDbgAssert((((LIS3MDLDriver *)ip)->config->i2cp->state == I2C_READY),
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"read_raw(), channel not ready");
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#if LIS3MDL_SHARED_I2C
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i2cAcquireBus(((LIS3MDLDriver *)ip)->config->i2cp);
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i2cStart(((LIS3MDLDriver *)ip)->config->i2cp,
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((LIS3MDLDriver *)ip)->config->i2ccfg);
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#endif /* LIS3MDL_SHARED_I2C */
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tmp = lis3mdlI2CReadRegister(((LIS3MDLDriver *)ip)->config->i2cp,
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((LIS3MDLDriver *)ip)->config->slaveaddress,
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LIS3MDL_AD_OUT_X_L, NULL);
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tmp += lis3mdlI2CReadRegister(((LIS3MDLDriver *)ip)->config->i2cp,
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((LIS3MDLDriver *)ip)->config->slaveaddress,
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LIS3MDL_AD_OUT_X_H, NULL) << 8;
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axes[0] = (int32_t)tmp - ((LIS3MDLDriver *)ip)->bias[0];
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tmp = lis3mdlI2CReadRegister(((LIS3MDLDriver *)ip)->config->i2cp,
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((LIS3MDLDriver *)ip)->config->slaveaddress,
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LIS3MDL_AD_OUT_Y_L, NULL);
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tmp += lis3mdlI2CReadRegister(((LIS3MDLDriver *)ip)->config->i2cp,
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((LIS3MDLDriver *)ip)->config->slaveaddress,
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LIS3MDL_AD_OUT_Y_H, NULL) << 8;
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axes[1] = (int32_t)tmp - ((LIS3MDLDriver *)ip)->bias[1];
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tmp = lis3mdlI2CReadRegister(((LIS3MDLDriver *)ip)->config->i2cp,
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((LIS3MDLDriver *)ip)->config->slaveaddress,
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LIS3MDL_AD_OUT_Z_L, NULL);
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tmp += lis3mdlI2CReadRegister(((LIS3MDLDriver *)ip)->config->i2cp,
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((LIS3MDLDriver *)ip)->config->slaveaddress,
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LIS3MDL_AD_OUT_Z_H, NULL) << 8;
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axes[2] = (int32_t)tmp - ((LIS3MDLDriver *)ip)->bias[2];
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#if LIS3MDL_SHARED_I2C
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i2cReleaseBus(((LIS3MDLDriver *)ip)->config->i2cp);
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#endif /* LIS3MDL_SHARED_I2C */
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#endif /* LIS3MDL_USE_I2C */
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return MSG_OK;
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}
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static msg_t read_cooked(void *ip, float axes[]) {
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uint32_t i;
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int32_t raw[LIS3MDL_NUMBER_OF_AXES];
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msg_t msg;
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osalDbgCheck((ip != NULL) && (axes != NULL));
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osalDbgAssert((((LIS3MDLDriver *)ip)->state == LIS3MDL_READY),
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"read_cooked(), invalid state");
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msg = read_raw(ip, raw);
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for(i = 0; i < LIS3MDL_NUMBER_OF_AXES ; i++){
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axes[i] = raw[i] / ((LIS3MDLDriver *)ip)->sensitivity[i];
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}
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return msg;
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}
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static msg_t set_bias(void *ip, int32_t *bp) {
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uint32_t i;
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osalDbgCheck((ip != NULL) && (bp !=NULL));
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osalDbgAssert((((LIS3MDLDriver *)ip)->state == LIS3MDL_READY) ||
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(((LIS3MDLDriver *)ip)->state == LIS3MDL_STOP),
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"set_bias(), invalid state");
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for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++) {
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((LIS3MDLDriver *)ip)->bias[i] = bp[i];
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}
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return MSG_OK;
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}
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static msg_t reset_bias(void *ip) {
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uint32_t i;
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osalDbgCheck(ip != NULL);
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osalDbgAssert((((LIS3MDLDriver *)ip)->state == LIS3MDL_READY) ||
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(((LIS3MDLDriver *)ip)->state == LIS3MDL_STOP),
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"reset_bias(), invalid state");
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for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++)
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((LIS3MDLDriver *)ip)->bias[i] = 0;
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return MSG_OK;
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}
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static msg_t set_sensivity(void *ip, float *sp) {
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uint32_t i;
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osalDbgCheck((ip != NULL) && (sp !=NULL));
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osalDbgAssert((((LIS3MDLDriver *)ip)->state == LIS3MDL_READY),
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"set_sensivity(), invalid state");
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for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++) {
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((LIS3MDLDriver *)ip)->sensitivity[i] = sp[i];
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}
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return MSG_OK;
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}
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static msg_t reset_sensivity(void *ip) {
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uint32_t i;
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osalDbgCheck(ip != NULL);
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osalDbgAssert((((LIS3MDLDriver *)ip)->state == LIS3MDL_READY),
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"reset_sensivity(), invalid state");
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if(((LIS3MDLDriver *)ip)->config->fullscale == LIS3MDL_FS_4GA)
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for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++)
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((LIS3MDLDriver *)ip)->sensitivity[i] = LIS3MDL_SENS_4GA;
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else if(((LIS3MDLDriver *)ip)->config->fullscale == LIS3MDL_FS_8GA)
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for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++)
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((LIS3MDLDriver *)ip)->sensitivity[i] = LIS3MDL_SENS_8GA;
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else if(((LIS3MDLDriver *)ip)->config->fullscale == LIS3MDL_FS_12GA)
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for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++)
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((LIS3MDLDriver *)ip)->sensitivity[i] = LIS3MDL_SENS_12GA;
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else if(((LIS3MDLDriver *)ip)->config->fullscale == LIS3MDL_FS_16GA)
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for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++)
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((LIS3MDLDriver *)ip)->sensitivity[i] = LIS3MDL_SENS_16GA;
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else {
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osalDbgAssert(FALSE, "reset_sensivity(), compass full scale issue");
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return MSG_RESET;
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}
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return MSG_OK;
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}
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static msg_t get_temperature(void *ip, float* tempp) {
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int16_t temp;
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#if LIS3MDL_USE_I2C
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osalDbgAssert((((LIS3MDLDriver *)ip)->config->i2cp->state == I2C_READY),
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"gyro_read_raw(), channel not ready");
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#if LIS3MDL_SHARED_I2C
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i2cAcquireBus(((LIS3MDLDriver *)ip)->config->i2cp);
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i2cStart(((LIS3MDLDriver *)ip)->config->i2cp,
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((LIS3MDLDriver *)ip)->config->i2ccfg);
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#endif /* LIS3MDL_SHARED_I2C */
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temp = (int16_t)(lis3mdlI2CReadRegister(((LIS3MDLDriver *)ip)->config->i2cp,
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((LIS3MDLDriver *)ip)->config->slaveaddress,
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LIS3MDL_AD_TEMP_OUT_L, NULL));
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temp += (int16_t)(lis3mdlI2CReadRegister(((LIS3MDLDriver *)ip)->config->i2cp,
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((LIS3MDLDriver *)ip)->config->slaveaddress,
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LIS3MDL_AD_TEMP_OUT_H, NULL) << 8);
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#if LIS3MDL_SHARED_I2C
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i2cReleaseBus(((LIS3MDLDriver *)ip)->config->i2cp);
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#endif /* LIS3MDL_SHARED_I2C */
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#endif /* LIS3MDL_USE_I2C */
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*tempp = (float)temp / LIS3MDL_TEMP_SENS;
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return MSG_OK;
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}
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static const struct BaseSensorVMT vmt_basesensor = {
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get_axes_number, read_raw, read_cooked
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};
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static const struct BaseCompassVMT vmt_basecompass = {
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get_axes_number, read_raw, read_cooked,
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set_bias, reset_bias, set_sensivity, reset_sensivity
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};
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static const struct LIS3MDLVMT vmt_lis3mdl = {
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get_axes_number, read_raw, read_cooked,
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set_bias, reset_bias, set_sensivity, reset_sensivity,
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get_temperature
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};
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Initializes an instance.
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*
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* @param[out] devp pointer to the @p LIS3MDLDriver object
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*
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* @init
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*/
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void lis3mdlObjectInit(LIS3MDLDriver *devp) {
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uint32_t i;
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devp->vmt_basesensor = &vmt_basesensor;
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devp->vmt_basecompass = &vmt_basecompass;
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devp->vmt_lis3mdl = &vmt_lis3mdl;
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devp->config = NULL;
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for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++)
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devp->bias[i] = 0;
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devp->state = LIS3MDL_STOP;
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}
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/**
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* @brief Configures and activates LIS3MDL Complex Driver peripheral.
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*
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* @param[in] devp pointer to the @p LIS3MDLDriver object
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* @param[in] config pointer to the @p LIS3MDLConfig object
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*
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* @api
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*/
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void lis3mdlStart(LIS3MDLDriver *devp, const LIS3MDLConfig *config) {
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uint32_t i;
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osalDbgCheck((devp != NULL) && (config != NULL));
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osalDbgAssert((devp->state == LIS3MDL_STOP) || (devp->state == LIS3MDL_READY),
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"lis3mdlStart(), invalid state");
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devp->config = config;
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#if LIS3MDL_USE_I2C
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#if LIS3MDL_SHARED_I2C
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i2cAcquireBus((devp)->config->i2cp);
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#endif /* LIS3MDL_SHARED_I2C */
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i2cStart((devp)->config->i2cp,
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(devp)->config->i2ccfg);
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lis3mdlI2CWriteRegister(devp->config->i2cp,
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devp->config->slaveaddress,
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LIS3MDL_AD_CTRL_REG1,
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devp->config->temperature |
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devp->config->outputdatarate |
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devp->config->operationmodexy);
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lis3mdlI2CWriteRegister(devp->config->i2cp,
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devp->config->slaveaddress,
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LIS3MDL_AD_CTRL_REG2,
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devp->config->fullscale);
|
|
lis3mdlI2CWriteRegister(devp->config->i2cp,
|
|
devp->config->slaveaddress,
|
|
LIS3MDL_AD_CTRL_REG3,
|
|
devp->config->conversionmode);
|
|
lis3mdlI2CWriteRegister(devp->config->i2cp,
|
|
devp->config->slaveaddress,
|
|
LIS3MDL_AD_CTRL_REG4,
|
|
devp->config->operationmodez |
|
|
devp->config->endianness);
|
|
lis3mdlI2CWriteRegister(devp->config->i2cp,
|
|
devp->config->slaveaddress,
|
|
LIS3MDL_AD_CTRL_REG5,
|
|
devp->config->blockdataupdate);
|
|
#if LIS3MDL_SHARED_I2C
|
|
i2cReleaseBus((devp)->config->i2cp);
|
|
#endif /* LIS3MDL_SHARED_I2C */
|
|
#endif /* LIS3MDL_USE_I2C */
|
|
/* Storing sensitivity information according to full scale value */
|
|
if(devp->config->fullscale == LIS3MDL_FS_4GA)
|
|
for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++)
|
|
devp->sensitivity[i] = LIS3MDL_SENS_4GA;
|
|
else if(devp->config->fullscale == LIS3MDL_FS_8GA)
|
|
for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++)
|
|
devp->sensitivity[i] = LIS3MDL_SENS_8GA;
|
|
else if(devp->config->fullscale == LIS3MDL_FS_12GA)
|
|
for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++)
|
|
devp->sensitivity[i] = LIS3MDL_SENS_12GA;
|
|
else if(devp->config->fullscale == LIS3MDL_FS_16GA)
|
|
for(i = 0; i < LIS3MDL_NUMBER_OF_AXES; i++)
|
|
devp->sensitivity[i] = LIS3MDL_SENS_16GA;
|
|
else
|
|
osalDbgAssert(FALSE, "lis3mdlStart(), compass full scale issue");
|
|
devp->state = LIS3MDL_READY;
|
|
}
|
|
|
|
/**
|
|
* @brief Deactivates the LIS3MDL Complex Driver peripheral.
|
|
*
|
|
* @param[in] devp pointer to the @p LIS3MDLDriver object
|
|
*
|
|
* @api
|
|
*/
|
|
void lis3mdlStop(LIS3MDLDriver *devp) {
|
|
|
|
osalDbgCheck(devp != NULL);
|
|
|
|
osalDbgAssert((devp->state == LIS3MDL_STOP) || (devp->state == LIS3MDL_READY),
|
|
"lis3mdlStop(), invalid state");
|
|
|
|
#if (LIS3MDL_USE_I2C)
|
|
if (devp->state == LIS3MDL_STOP) {
|
|
#if LIS3MDL_SHARED_I2C
|
|
i2cAcquireBus((devp)->config->i2cp);
|
|
i2cStart((devp)->config->i2cp,
|
|
(devp)->config->i2ccfg);
|
|
#endif /* LIS3MDL_SHARED_I2C */
|
|
lis3mdlI2CWriteRegister(devp->config->i2cp,
|
|
devp->config->slaveaddress,
|
|
LIS3MDL_AD_CTRL_REG3,
|
|
LIS3MDL_MD_POWER_DOWN);
|
|
i2cStop((devp)->config->i2cp);
|
|
#if LIS3MDL_SHARED_I2C
|
|
i2cReleaseBus((devp)->config->i2cp);
|
|
#endif /* LIS3MDL_SHARED_I2C */
|
|
}
|
|
#endif /* LIS3MDL_USE_I2C */
|
|
devp->state = LIS3MDL_STOP;
|
|
}
|
|
/** @} */
|