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 elopes
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/*
* Copyright (C) 2014 Freie Universität Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup drivers_lps331ap LPS331AP Pressure Sensor Driver
* @ingroup drivers_sensors
* @brief Device driver for the LPS331AP pressure sensor
* @{
*
* @file
* @brief Device driver interface for the LPS331AP pressure sensor
*
* @note This driver uses the sensors I2C interface
*
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
*/
#ifndef LPS331AP_H
#define LPS331AP_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include "periph/i2c.h"
/**
* @brief The sensors default I2C address
*/
#define LPS331AP_DEFAULT_ADDRESS (0x5c)
/**
* @brief Device descriptor for LPS331AP sensors
*/
typedef struct {
i2c_t i2c; /**< I2C device the sensor is connected to */
uint8_t address; /**< I2C bus address of the sensor */
} lps331ap_t;
/**
* @brief Possible sampling rates for LPS331AP sensors
*/
typedef enum {
LPS331AP_RATE_1HZ = 1, /**< sample with 1Hz */
LPS331AP_RATE_7HZ = 5, /**< sample with 7Hz */
LPS331AP_RATE_12HZ5 = 6, /**< sample with 12.5Hz */
LPS331AP_RATE_25HZ = 7 /**< sample with 25Hz */
} lps331ap_rate_t;
/**
* @brief Struct holding all parameters needed for device initialization
*/
typedef struct {
i2c_t i2c; /**< I2C bus the sensor is connected to */
uint8_t addr; /**< the devices address on the bus */
lps331ap_rate_t rate; /**< tell sensor to sample with this rate */
} lps331ap_params_t;
/**
* @brief Initialize a given LPS331AP pressure sensor
*
* @param[out] dev device descriptor of the sensor
* @param[in] i2c I2C bus the sensor is connected to
* @param[in] address the sensor's address on the I2C bus
* @param[in] rate internal sampling rate of the sensor
*
* @return 0 on success
* @return -1 on error
*/
int lps331ap_init(lps331ap_t *dev, i2c_t i2c, uint8_t address, lps331ap_rate_t rate);
/**
* @brief Read a temperature value from the given sensor, returned in m°C
*
* @param[in] dev device descriptor of sensor to read from
*
* @return temperature value in m°C
*/
int lps331ap_read_temp(const lps331ap_t *dev);
/**
* @brief Read a pressure value from the given sensor, returned in mbar
*
* @param[in] dev device descriptor of sensor to read from
*
* @return pressure value in mbar
*/
int lps331ap_read_pres(const lps331ap_t *dev);
/**
* @brief Enable the given sensor
*
* @param[in] dev device descriptor of sensor to enable
*
* @return 0 on success
* @return -1 on error
*/
int lps331ap_enable(const lps331ap_t *dev);
/**
* @brief Disable the given sensor
*
* @param[in] dev device descriptor of sensor to disable
*
* @return 0 on success
* @return -1 on error
*/
int lps331ap_disable(const lps331ap_t *dev);
#ifdef __cplusplus
}
#endif
#endif /* LPS331AP_H */
/** @} */
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