/*
ChibiOS - Copyright (C) 2016..2018 Rocco Marco Guglielmi
This file is part of ChibiOS.
ChibiOS 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 3 of the License, or
(at your option) any later version.
ChibiOS 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/>.
*/
/**
* @file lps25h.h
* @brief LPS25H MEMS interface module header.
*
* @addtogroup LPS25H
* @ingroup EX_ST
* @{
*/
#ifndef _LPS25H_H_
#define _LPS25H_H_
#include "hal_barometer.h"
#include "hal_thermometer.h"
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/**
* @name Version identification
* @{
*/
/**
* @brief LPS25H driver version string.
*/
#define EX_LPS25H_VERSION "1.1.2"
/**
* @brief LPS25H driver version major number.
*/
#define EX_LPS25H_MAJOR 1
/**
* @brief LPS25H driver version minor number.
*/
#define EX_LPS25H_MINOR 1
/**
* @brief LPS25H driver version patch number.
*/
#define EX_LPS25H_PATCH 2
/** @} */
/**
* @brief LPS25H barometer subsystem characteristics.
* @note Sensitivity is expressed as hPa/LSB whereas hPa stand for
* hectopascal.
* @note Bias is expressed as hPa.
*
* @{
*/
#define LPS25H_BARO_NUMBER_OF_AXES 1U
#define LPS25H_BARO_SENS 0.00024414f
#define LPS25H_BARO_BIAS 0.0f
/** @} */
/**
* @brief LPS25H thermometer subsystem characteristics.
* @note Sensitivity is expressed as �C/LSB.
* @note Bias is expressed as �C.
*
* @{
*/
#define LPS25H_THERMO_NUMBER_OF_AXES 1U
#define LPS25H_THERMO_SENS 0.00208333f
#define LPS25H_THERMO_BIAS -42.5f
/** @} */
/**
* @name LPS25H communication interfaces related bit masks
* @{
*/
#define LPS25H_DI_MASK 0xFF
#define LPS25H_DI(n) (1 << n)
#define LPS25H_AD_MASK 0x3F
#define LPS25H_AD(n) (1 << n)
#define LPS25H_MS (1 << 6)
#define LPS25H_RW (1 << 7)
#define LPS25H_SUB_MS (1 << 7)
/** @} */
/**
* @name LPS25H register addresses
* @{
*/
#define LPS25H_AD_REF_P_XL 0x08
#define LPS25H_AD_REF_P_L 0x09
#define LPS25H_AD_REF_P_H 0x0A
#define LPS25H_AD_WHO_AM_I 0x0F
#define LPS25H_AD_RES_CONF 0x10
#define LPS25H_AD_CTRL_REG1 0x20
#define LPS25H_AD_CTRL_REG2 0x21
#define LPS25H_AD_CTRL_REG3 0x22
#define LPS25H_AD_CTRL_REG4 0x23
#define LPS25H_AD_INT_CFG 0x24
#define LPS25H_AD_INT_SRC 0x25
#define LPS25H_AD_STATUS_REG 0x27
#define LPS25H_AD_PRESS_OUT_XL 0x28
#define LPS25H_AD_PRESS_OUT_L 0x29
#define LPS25H_AD_PRESS_OUT_H 0x2A
#define LPS25H_AD_TEMP_OUT_L 0x2B
#define LPS25H_AD_TEMP_OUT_H 0x2C
#define LPS25H_AD_FIFO_CTRL 0x2E
#define LPS25H_AD_FIFO_SRC 0x2F
#define LPS25H_AD_THS_P_L 0x30
#define LPS25H_AD_THS_P_H 0x31
#define LPS25H_AD_RPDS_L 0x39
#define LPS25H_AD_RPDS_H 0x3A
/** @} */
/**
* @name LPS25H_CTRL_REG1 register bits definitions
* @{
*/
#define LPS25H_CTRL_REG1_MASK 0xFF
#define LPS25H_CTRL_REG1_SIM (1 << 0)
#define LPS25H_CTRL_REG1_RESET_AZ (1 << 1)
#define LPS25H_CTRL_REG1_BDU (1 << 2)
#define LPS25H_CTRL_REG1_DIFF_EN (1 << 3)
#define LPS25H_CTRL_REG1_ODR0 (1 << 4)
#define LPS25H_CTRL_REG1_ODR1 (1 << 5)
#define LPS25H_CTRL_REG1_ODR2 (1 << 6)
#define LPS25H_CTRL_REG1_PD (1 << 7)
/** @} */
/**
* @name LPS25H_CTRL_REG2 register bits definitions
* @{
*/
#define LPS25H_CTRL_REG2_MASK 0xF3
#define LPS25H_CTRL_REG2_ONE_SHOT (1 << 0)
#define LPS25H_CTRL_REG2_AUTO_ZERO (1 << 1)
#define LPS25H_CTRL_REG2_SWRESET (1 << 2)
#define LPS25H_CTRL_REG2_FIFO_MEAN_DEC (1 << 4)
#define LPS25H_CTRL_REG2_WTM_EN (1 << 5)
#define LPS25H_CTRL_REG2_FIFO_EN (1 << 6)
#define LPS25H_CTRL_REG2_BOOT (1 << 7)
/** @} */
/**
* @name LPS25H_CTRL_REG3 register bits definitions
* @{
*/
#define LPS25H_CTRL_REG3_MASK 0xC3
#define LPS25H_CTRL_REG3_INT_S1 (1 << 0)
#define LPS25H_CTRL_REG3_INT_S2 (1 << 1)
#define LPS25H_CTRL_REG3_PP_OD (1 << 6)
#define LPS25H_CTRL_REG3_INT_H_L (1 << 7)
/** @} */
/**
* @name LPS25H_CTRL_REG4 register bits definitions
* @{
*/
#define LPS25H_CTRL_REG4_MASK 0x0F
#define LPS25H_CTRL_REG4_P1_DRDY (1 << 0)
#define LPS25H_CTRL_REG4_P1_OVERRUN (1 << 1)
#define LPS25H_CTRL_REG4_P1_WTM (1 << 2)
#define LPS25H_CTRL_REG4_P1_EMPTY (1 << 3)
/** @} */
/**
* @name LPS25H_INT1_CFG register bits definitions
* @{
*/
#define LPS25H_INT1_CFG_MASK 0x07
#define LPS25H_INT1_CFG_PH_E (1 << 0)
#define LPS25H_INT1_CFG_PL_E (1 << 1)
#define LPS25H_INT1_CFG_LIR (1 << 2)
/** @} */
/**
* @name LPS25H_INT1_SRC register bits definitions
* @{
*/
#define LPS25H_INT1_SRC_MASK 0x07
#define LPS25H_INT1_SRC_PH (1 << 0)
#define LPS25H_INT1_SRC_PL (1 << 1)
#define LPS25H_INT1_SRC_IA (1 << 2)
/** @} */
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name Configuration options
* @{
*/
/**
* @brief LPS25H SPI interface switch.
* @details If set to @p TRUE the support for SPI is included.
* @note The default is @p FALSE.
*/
#if !defined(LPS25H_USE_SPI) || defined(__DOXYGEN__)
#define LPS25H_USE_SPI FALSE
#endif
/**
* @brief LPS25H shared SPI switch.
* @details If set to @p TRUE the device acquires SPI bus ownership
* on each transaction.
* @note The default is @p FALSE. Requires SPI_USE_MUTUAL_EXCLUSION.
*/
#if !defined(LPS25H_SHARED_SPI) || defined(__DOXYGEN__)
#define LPS25H_SHARED_SPI FALSE
#endif
/**
* @brief LPS25H I2C interface switch.
* @details If set to @p TRUE the support for I2C is included.
* @note The default is @p TRUE.
*/
#if !defined(LPS25H_USE_I2C) || defined(__DOXYGEN__)
#define LPS25H_USE_I2C TRUE
#endif
/**
* @brief LPS25H shared I2C switch.
* @details If set to @p TRUE the device acquires I2C bus ownership
* on each transaction.
* @note The default is @p FALSE. Requires I2C_USE_MUTUAL_EXCLUSION.
*/
#if !defined(LPS25H_SHARED_I2C) || defined(__DOXYGEN__)
#define LPS25H_SHARED_I2C FALSE
#endif
/**
* @brief LPS25H advanced configurations switch.
* @details If set to @p TRUE more configurations are available.
* @note The default is @p FALSE.
*/
#if !defined(LPS25H_USE_ADVANCED) || defined(__DOXYGEN__)
#define LPS25H_USE_ADVANCED FALSE
#endif
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if !(LPS25H_USE_SPI ^ LPS25H_USE_I2C)
#error "LPS25H_USE_SPI and LPS25H_USE_I2C cannot be both true or both false"
#endif
#if LPS25H_USE_SPI && !HAL_USE_SPI
#error "LPS25H_USE_SPI requires HAL_USE_SPI"
#endif
#if LPS25H_SHARED_SPI && !SPI_USE_MUTUAL_EXCLUSION
#error "LPS25H_SHARED_SPI requires SPI_USE_MUTUAL_EXCLUSION"
#endif
#if LPS25H_USE_I2C && !HAL_USE_I2C
#error "LPS25H_USE_I2C requires HAL_USE_I2C"
#endif
#if LPS25H_SHARED_I2C && !I2C_USE_MUTUAL_EXCLUSION
#error "LPS25H_SHARED_I2C requires I2C_USE_MUTUAL_EXCLUSION"
#endif
/**
* @todo Add support for LPS25H over SPI.
*/
#if LPS25H_USE_SPI
#error "LPS25H over SPI still not supported"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @name LPS25H data structures and types.
* @{
*/
/**
* @brief Structure representing a LPS25H driver.
*/
typedef struct LPS25HDriver LPS25HDriver;
/**
* @brief LPS25H slave address
*/
typedef enum {
LPS25H_SAD_GND = 0x5C, /**< Slave Address when SA0 is to GND */
LPS25H_SAD_VCC = 0x5D /**< Slave Address when SA0 is to VCC */
}lps25h_sad_t;
/**
* @brief LPS25H output data rate and bandwidth.
*/
typedef enum {
LPS25H_ODR_ONE_SHOT = 0x00, /**< One shot. */
LPS25H_ODR_1HZ = 0x10, /**< Output data rate 1 Hz. */
LPS25H_ODR_7HZ = 0x20, /**< Output data rate 7 Hz. */
LPS25H_ODR_12P5HZ = 0x30, /**< Output data rate 12.5 Hz. */
LPS25H_ODR_25HZ = 0x40 /**< Output data rate 25 Hz. */
}lps25h_odr_t;
/**
* @brief LPS25H pressure resolution.
*/
typedef enum {
LPS25H_AVGP_8 = 0x00, /**< Number of internal average is 8. */
LPS25H_AVGP_32 = 0x01, /**< Number of internal average is 32. */
LPS25H_AVGP_128 = 0x02, /**< Number of internal average is 128. */
LPS25H_AVGP_512 = 0x03, /**< Number of internal average is 512. */
}lps25h_avgp_t;
/**
* @brief LPS25H temperature resolution.
*/
typedef enum {
LPS25H_AVGT_8 = 0x00, /**< Number of internal average is 8. */
LPS25H_AVGT_32 = 0x04, /**< Number of internal average is 32. */
LPS25H_AVGT_128 = 0x08, /**< Number of internal average is 128. */
LPS25H_AVGT_512 = 0x0C, /**< Number of internal average is 512. */
}lps25h_avgt_t;
/**
* @brief LPS25H block data update.
*/
typedef enum {
LPS25H_BDU_CONTINUOUS = 0x00, /**< Block data continuously updated. */
LPS25H_BDU_BLOCKED = 0x40 /**< Block data updated after reading. */
}lps25h_bdu_t;
/**
* @brief Driver state machine possible states.
*/
typedef enum {
LPS25H_UNINIT = 0, /**< Not initialized. */
LPS25H_STOP = 1, /**< Stopped. */
LPS25H_READY = 2, /**< Ready. */
} lps25h_state_t;
/**
* @brief LPS25H configuration structure.
*/
typedef struct {
#if LPS25H_USE_SPI || defined(__DOXYGEN__)
/**
* @brief SPI driver associated to this LPS25H.
*/
SPIDriver *spip;
/**
* @brief SPI configuration associated to this LPS25H.
*/
const SPIConfig *spicfg;
#endif /* LPS25H_USE_SPI */
#if LPS25H_USE_I2C || defined(__DOXYGEN__)
/**
* @brief I2C driver associated to this LPS25H.
*/
I2CDriver *i2cp;
/**
* @brief I2C configuration associated to this LPS25H.
*/
const I2CConfig *i2ccfg;
/**
* @brief LPS25H slave address
*/
lps25h_sad_t slaveaddress;
#endif /* LPS25H_USE_I2C */
/**
* @brief LPS25H barometer subsystem initial sensitivity.
*/
float *barosensitivity;
/**
* @brief LPS25H barometer subsystem initial bias.
*/
float *barobias;
/**
* @brief LPS25H thermometer subsystem initial sensitivity.
*/
float *thermosensitivity;
/**
* @brief LPS25H thermometer subsystem initial bias.
*/
float *thermobias;
/**
* @brief LPS25H output data rate selection.
*/
lps25h_odr_t outputdatarate;
#if LPS25H_USE_ADVANCED || defined(__DOXYGEN__)
/**
* @brief LPS25H block data update.
*/
lps25h_bdu_t blockdataupdate;
/**
* @brief LPS25H barometer subsystem resolution.
*/
lps25h_avgp_t baroresolution;
/**
* @brief LPS25H thermometer subsystem resolution.
*/
lps25h_avgt_t thermoresolution;
#endif
} LPS25HConfig;
/**
* @brief @p LPS25H specific methods.
* @note No methods so far, just a common ancestor interface.
*/
#define _lps25h_methods_alone
/**
* @brief @p LPS25H specific methods with inherited ones.
*/
#define _lps25h_methods \
_base_object_methods \
_lps25h_methods_alone
/**
* @extends BaseObjectVMT
*
* @brief @p LPS25H virtual methods table.
*/
struct LPS25HVMT {
_lps25h_methods
};
/**
* @brief @p LPS25HDriver specific data.
*/
#define _lps25h_data \
/* Driver state.*/ \
lps25h_state_t state; \
/* Current configuration data.*/ \
const LPS25HConfig *config; \
/* Barometer subsystem axes number.*/ \
size_t baroaxes; \
/* Barometer subsystem current sensitivity.*/ \
float barosensitivity; \
/* Barometer subsystem current bias .*/ \
float barobias; \
/* Thermometer subsystem axes number.*/ \
size_t thermoaxes; \
/* Thermometer subsystem current sensitivity.*/ \
float thermosensitivity; \
/* Thermometer subsystem current bias.*/ \
float thermobias;
/**
* @brief LPS25H 2-axis barometer/thermometer class.
*/
struct LPS25HDriver {
/** @brief Virtual Methods Table.*/
const struct LPS25HVMT *vmt;
/** @brief Base barometer interface.*/
BaseBarometer baro_if;
/** @brief Base thermometer interface.*/
BaseThermometer thermo_if;
_lps25h_data
};
/** @} */
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @brief Return the number of axes of the BaseBarometer.
*
* @param[in] devp pointer to @p LPS25HDriver.
*
* @return the number of axes.
*
* @api
*/
#define lps25hBarometerGetAxesNumber(devp) \
barometerGetAxesNumber(&((devp)->baro_if))
/**
* @brief Retrieves raw data from the BaseBarometer.
* @note This data is retrieved from MEMS register without any algebraical
* manipulation.
* @note The axes array must be at least the same size of the
* BaseBarometer axes number.
*
* @param[in] devp pointer to @p LPS25HDriver.
* @param[out] axes a buffer which would be filled with raw data.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
* @retval MSG_RESET if one or more I2C errors occurred, the errors can
* be retrieved using @p i2cGetErrors().
* @retval MSG_TIMEOUT if a timeout occurred before operation end.
*
* @api
*/
#define lps25hBarometerReadRaw(devp, axes) \
barometerReadRaw(&((devp)->baro_if), axes)
/**
* @brief Retrieves cooked data from the BaseBarometer.
* @note This data is manipulated according to the formula
* cooked = (raw * sensitivity) - bias.
* @note Final data is expressed as hPa.
* @note The axes array must be at least the same size of the
* BaseBarometer axes number.
*
* @param[in] devp pointer to @p LPS25HDriver.
* @param[out] axes a buffer which would be filled with cooked data.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
* @retval MSG_RESET if one or more I2C errors occurred, the errors can
* be retrieved using @p i2cGetErrors().
* @retval MSG_TIMEOUT if a timeout occurred before operation end.
*
* @api
*/
#define lps25hBarometerReadCooked(devp, axes) \
barometerReadCooked(&((devp)->baro_if), axes)
/**
* @brief Set bias values for the BaseBarometer.
* @note Bias must be expressed as hPa.
* @note The bias buffer must be at least the same size of the
* BaseBarometer axes number.
*
* @param[in] devp pointer to @p LPS25HDriver.
* @param[in] bp a buffer which contains biases.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
*
* @api
*/
#define lps25hBarometerSetBias(devp, bp) \
barometerSetBias(&((devp)->baro_if), bp)
/**
* @brief Reset bias values for the BaseBarometer.
* @note Default biases value are obtained from device datasheet when
* available otherwise they are considered zero.
*
* @param[in] devp pointer to @p LPS25HDriver.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
*
* @api
*/
#define lps25hBarometerResetBias(devp) \
barometerResetBias(&((devp)->baro_if))
/**
* @brief Set sensitivity values for the BaseBarometer.
* @note Sensitivity must be expressed as hPa/LSB.
* @note The sensitivity buffer must be at least the same size of the
* BaseBarometer axes number.
*
* @param[in] devp pointer to @p LPS25HDriver.
* @param[in] sp a buffer which contains sensitivities.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
*
* @api
*/
#define lps25hBarometerSetSensitivity(devp, sp) \
barometerSetSensitivity(&((devp)->baro_if), sp)
/**
* @brief Reset sensitivity values for the BaseBarometer.
* @note Default sensitivities value are obtained from device datasheet.
*
* @param[in] devp pointer to @p LPS25HDriver.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
*
* @api
*/
#define lps25hBarometerResetSensitivity(devp) \
barometerResetSensitivity(&((devp)->baro_if))
/**
* @brief Return the number of axes of the BaseThermometer.
*
* @param[in] devp pointer to @p LPS25HDriver.
*
* @return the number of axes.
*
* @api
*/
#define lps25hThermometerGetAxesNumber(devp) \
thermometerGetAxesNumber(&((devp)->thermo_if))
/**
* @brief Retrieves raw data from the BaseThermometer.
* @note This data is retrieved from MEMS register without any algebraical
* manipulation.
* @note The axes array must be at least the same size of the
* BaseThermometer axes number.
*
* @param[in] devp pointer to @p LPS25HDriver.
* @param[out] axes a buffer which would be filled with raw data.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
* @retval MSG_RESET if one or more I2C errors occurred, the errors can
* be retrieved using @p i2cGetErrors().
* @retval MSG_TIMEOUT if a timeout occurred before operation end.
*
* @api
*/
#define lps25hThermometerReadRaw(devp, axes) \
thermometerReadRaw(&((devp)->thermo_if), axes)
/**
* @brief Retrieves cooked data from the BaseThermometer.
* @note This data is manipulated according to the formula
* cooked = (raw * sensitivity) - bias.
* @note Final data is expressed as °C.
* @note The axes array must be at least the same size of the
* BaseThermometer axes number.
*
* @param[in] devp pointer to @p LPS25HDriver.
* @param[out] axes a buffer which would be filled with cooked data.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
* @retval MSG_RESET if one or more I2C errors occurred, the errors can
* be retrieved using @p i2cGetErrors().
* @retval MSG_TIMEOUT if a timeout occurred before operation end.
*
* @api
*/
#define lps25hThermometerReadCooked(devp, axes) \
thermometerReadCooked(&((devp)->thermo_if), axes)
/**
* @brief Set bias values for the BaseThermometer.
* @note Bias must be expressed as °C.
* @note The bias buffer must be at least the same size of the
* BaseThermometer axes number.
*
* @param[in] devp pointer to @p LPS25HDriver.
* @param[in] bp a buffer which contains biases.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
*
* @api
*/
#define lps25hThermometerSetBias(devp, bp) \
thermometerSetBias(&((devp)->thermo_if), bp)
/**
* @brief Reset bias values for the BaseThermometer.
* @note Default biases value are obtained from device datasheet when
* available otherwise they are considered zero.
*
* @param[in] devp pointer to @p LPS25HDriver.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
*
* @api
*/
#define lps25hThermometerResetBias(devp) \
thermometerResetBias(&((devp)->thermo_if))
/**
* @brief Set sensitivity values for the BaseThermometer.
* @note Sensitivity must be expressed as °C/LSB.
* @note The sensitivity buffer must be at least the same size of the
* BaseThermometer axes number.
*
* @param[in] devp pointer to @p LPS25HDriver.
* @param[in] sp a buffer which contains sensitivities.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
*
* @api
*/
#define lps25hThermometerSetSensitivity(devp, sp) \
thermometerSetSensitivity(&((devp)->thermo_if), sp)
/**
* @brief Reset sensitivity values for the BaseThermometer.
* @note Default sensitivities value are obtained from device datasheet.
*
* @param[in] devp pointer to @p LPS25HDriver.
*
* @return The operation status.
* @retval MSG_OK if the function succeeded.
*
* @api
*/
#define lps25hThermometerResetSensitivity(devp) \
thermometerResetSensitivity(&((devp)->thermo_if))
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void lps25hObjectInit(LPS25HDriver *devp);
void lps25hStart(LPS25HDriver *devp, const LPS25HConfig *config);
void lps25hStop(LPS25HDriver *devp);
#ifdef __cplusplus
}
#endif
#endif /* _LPS25H_H_ */
/** @} */