/** * Copyright (c) 2017 - 2018, Nordic Semiconductor ASA * * All rights reserved. * * 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, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, 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 Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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. * */ #ifndef LPS22HB_H #define LPS22HB_H #include "nrf_twi_sensor.h" #include "lps22hb_internal.h" #ifdef __cplusplus extern "C" { #endif /** * @brief Possible sensor addresses. */ #define LPS22HB_BASE_ADDRESS_LOW 0x5CU #define LPS22HB_BASE_ADDRESS_HIGH 0x5DU // WHO_AM_I register value #define LPS22HB_WHO_AM_I 0xB1 // Minimum nrf_twi_sensor message buffer size and nrf_twi_mngr queue length. #define LPS22HB_MIN_QUEUE_SIZE 4 /** * @brief Sensor driver usage. * * Sensor instance has to be defined first in global context using @ref LPS22HB_INSTANCE DEF. * After that it has to be initialized using @ref lps22hb_init. * At this point sensor instance is ready and all other functions can be used. * * There are two ways in which sensor settings are set: * * First one are asynchronous macros, using them does not change real sensor settings * until @ref lps22hb_cfg_commit is called. * Example: * LPS22HB_DATA_CFG(m_sensor1, LPS22HB_ODR_POWERDOWN, false, false); * LPS22HB_FIFO_CFG(m_sensor1, LPS22HB_STREAM, true, false, 15); * lps22hb_cfg_commit(&m_sensor1); * * Second way are functions, functions schedule TWI operation using @ref nrf_twi_sensor module. * After calling function, setting will be automatically send to sensor when TWI bus is free. * Example: * lps22hb_low_power_enable(&m_sensor1, true); * lps22hb_offset_set(&m_sensor1, -27); * * There are designated functions to read status sensor registers e.g. @ref lps22hb_int_source_read * As parameters they receive function to be called after register is read, and pointer where * register value should be stored. From that value specific parameters can be extracted * using @ref NRF_TWI_SENSOR_REG_VAL_GET macro. * Example: * uint8_t ia = NRF_TWI_SENSOR_REG_VAL_GET(int_source_reg, LPS22HB_IA_MASK, LPS22HB_IA_POS); * * Other functions are self-explanatory or have description on their usage. */ /** * @brief Output data rate settings. */ typedef enum { LPS22HB_ODR_POWERDOWN, LPS22HB_ODR_1HZ, LPS22HB_ODR_10HZ, LPS22HB_ODR_25HZ, LPS22HB_ODR_50HZ, LPS22HB_ODR_75HZ } lps22hb_odr_t; /** * @brief Fifo mode settings. */ typedef enum { LPS22HB_BYPASS, LPS22HB_FIFO, LPS22HB_STREAM, LPS22HB_STREAM_TO_FIFO, LPS22HB_BYPASS_TO_STREAM, LPS22HB_RESERVED_FIFO, LPS22HB_DYNAMIC_STREAM, LPS22HB_BYPASS_TO_FIFO } lps22hb_fifo_mode_t; /** * @brief Low pass filter configuration. */ typedef enum { LPS22HB_LPFP_DISABLE = 1, LPS22HB_LPFP_ODR_DIV_9, LPS22HB_LPFP_ODR_DIV_20 } lps22hb_lpfp_t; /** * @brief Pressure and temperature output data. * * @note To get pressure in hPa it has to be divided by 4096. * To get temperature in degrees it has to be divided by 100. */ typedef struct { int32_t pressure; int16_t temperature; } lps22hb_data_t; /** * @brief Data callback prototype. * * @param[in] result Result of operation (NRF_SUCCESS on success, * otherwise a relevant error code). * @param[in] p_raw_data Pointer to raw sensor data structure. */ typedef void (* lps22hb_data_callback_t)(ret_code_t result, lps22hb_data_t * p_raw_data); /** * @brief Macro creating lps22hb sensor instance. * * @param[in] _lps22hb_inst_name Sensor instance name. * @param[in] _p_twi_sensor Pointer to common TWI sensor instance. * @param[in] _sensor_address Sensor base address. */ #define LPS22HB_INSTANCE_DEF(_lps22hb_inst_name, _p_twi_sensor, _sensor_address) \ LPS22HB_INTERNAL_INSTANCE_DEF(_lps22hb_inst_name, _p_twi_sensor, _sensor_address) /** * =============================================================================================== * @brief Sensor configuration macros. * * @note After setting configuration using these macros, it has to be committed to sensor * using @ref lps22hb_cfg_commit */ /** * @brief Macro for interrupt configuration. * * @param[in] _s Sensor instance. * @param[in] _diff_en Enable interrupt generation. True if enabled. * @param[in] _lir Latch interrupt request to INT_SOURCE register. True if enabled. * @param[in] _ple Enable interrupt generation on pressure low event. True if enabled. * @param[in] _phe Enable interrupt generation on pressure high event. True if enabled. */ #define LPS22HB_INT_CFG(_s, _diff_en, _lir, _ple, _phe)\ LPS22HB_INTERNAL_INT_CFG(_s, _diff_en, _lir, _ple, _phe) /** * @brief Macro for data acquisition configuration. * * @param[in] _s Sensor instance. * @param[in] _odr Desired output data rate. @ref lps22hb_odr_t * @param[in] _f_en Enables filter. True if enabled. * @param[in] _f_cfg Filter configuration. * @arg true Filter bandwidth is ODR/20 * @arg false Filter bandwidth is ODR/9 */ #define LPS22HB_DATA_CFG(_s, _odr, _f_en, _f_cfg)\ LPS22HB_INTERNAL_DATA_CFG(_s, _odr, _f_en, _f_cfg) /** * @brief Macro for FIFO configuration. * * @param[in] _s Sensor instance. * @param[in] _f_mode FIFO mode. @ref lps22hb_fifo_mode_t * @param[in] _f_en Enable FIFO. True if enabled. * @param[in] _f_stop Stop on FIFO watermark. True if enabled. * @param[in] _f_wtm FIFO watermark value. Between 0 and 31. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ #define LPS22HB_FIFO_CFG(_s, _f_mode, _f_en, _f_stop, _f_wtm)\ LPS22HB_INTERNAL_FIFO_CFG(_s, _f_mode, _f_en, _f_stop, _f_wtm) /** * @brief Macro for INT_DRDY pin configuration. * @param[in] _s Sensor instance. * @param[in] _activ Active state. * @arg true Active low. * @arg false Active high. * @param[in] _pp_od Pin operation. * @arg true Open drain. * @arg false Push-pull. * @param[in] _fss FIFO full flag. True if enabled. * @param[in] _fth FIFO watermark status. True if enabled. * @param[in] _ovr FIFO overrun interrupt. True if enabled. * @param[in] _drdy Data Ready signal. True if enabled. * @param[in] _high Pressure higher than interrupt threshold. True if enabled. * @param[in] _low Pressure lower than interrupt threshold. True if enabled. */ #define LPS22HB_DRDY_CFG(_s, _activ, _pp_od, _fss, _fth, _ovr, _drdy, _high, _low)\ LPS22HB_INTERNAL_DRDY_CFG(_s, _activ, _pp_od, _fss, _fth, _ovr, _drdy, _high, _low) /** * =============================================================================================== */ /** * @brief Function for initializing lps22hb sensor. * * Writes configuration data in sensor instance to sensor. * * @param[in] p_instance Pointer to sensor instance created by macro * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t lps22hb_init(lps22hb_instance_t * p_instance); /** * @brief Function for enabling autorifp. * * @param[in] p_instance Pointer to sensor instance * @param[in] enable Autorifp setting. * @arg true Autorifp is enabled. * @arg false Autorifp is disabled and reset. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t lps22hb_autorifp_enable(lps22hb_instance_t * p_instance, bool enable); /** * @brief Function for enabling autozero. * * @param[in] p_instance Pointer to sensor instance * @param[in] enable Autozero setting. * @arg true Autozero is enabled. * @arg false Autozero is disabled and reset. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t lps22hb_autozero_enable(lps22hb_instance_t * p_instance, bool enable); /** * @brief Function performing software reset. * * @param[in] p_instance Pointer to sensor instance. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t lps22hb_sw_reset(lps22hb_instance_t * p_instance); /** * @brief Function performing boot. * * @param[in] p_instance Pointer to sensor instance. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t lps22hb_boot(lps22hb_instance_t * p_instance); /** * @brief Function setting oneshot. * * @param[in] p_instance Pointer to sensor instance. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t lps22hb_oneshot(lps22hb_instance_t * p_instance); /** * @brief Function for reading pressure and temperature data. * * @param[in] p_instance Pointer to sensor instance. * @param[in] user_callback Function to be called when data is gathered. * @param[out] p_out_data Pointer to raw data buffer. * @param[in] samples Number of data samples to read. * * @note Data can be read in two ways. With or without sensors FIFO. * FIFO mode depends on FIFO mode set using lps22hb_fifo_mode_set function. * FIFO is enabled using lps22hb_fifo_enable function. * Without FIFO only one sample can be acquired, p_out_data can be pointer to single variable. * With FIFO enabled, data can be read in burst mode, p_out_data table has to be same * or bigger than number of samples to read. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_reg_read */ ret_code_t lps22hb_data_read(lps22hb_instance_t * p_instance, lps22hb_data_callback_t user_callback, lps22hb_data_t * p_out_data, uint8_t samples); /** * @brief Function for converting raw sensor data to real. * * @param[in/out] p_data Pointer to data to be processed. * @param[in] samples Number of samples to be processed. * * @note After data is processed, structure contains pressure in hPa*4096 * and temperature in Celsius degrees*100 */ void lps22hb_data_decode(lps22hb_data_t * p_data, uint8_t samples); /** * @brief Function for setting reference pressure. * * @param[in] p_instance Pointer to sensor instance. * @param[in] pressure Reference pressure in hPa*4096 * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t lps22hb_ref_pressure_set(lps22hb_instance_t * p_instance, int32_t pressure); /** * @brief Function for setting pressure offset. * * @param[in] p_instance Pointer to sensor instance. * @param[in] offset Pressure offset in hPa. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t lps22hb_offset_set(lps22hb_instance_t * p_instance, int16_t offset); /** * @brief Function for setting interrupt threshold. * * @param[in] p_instance Pointer to sensor instance. * @param[in] threshold Interrupt threshold in hPa. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t lps22hb_threshold_set(lps22hb_instance_t * p_instance, uint16_t threshold); /** * @brief Function for enabling low power mode. * * @param[in] p_instance Pointer to sensor instance. * @param[in] enable Enable low power mode. True if enabled. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t lps22hb_low_power_enable(lps22hb_instance_t * p_instance, bool enable); /** * @brief Function for setting sensor configuration. * * @param[in] p_instance Pointer to sensor instance. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t lps22hb_cfg_commit(lps22hb_instance_t * p_instance); /** * @brief Function for resetting filter. * * @param[in] p_instance Pointer to sensor instance. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ __STATIC_INLINE ret_code_t lps22hb_reset_filter(lps22hb_instance_t * p_instance); /** * @brief Function for reading who am i register. * * @param[in] p_instance Pointer to sensor instance. * @param[in] user_cb Function to be called after register is read. * @param[out] reg_val Register value, single uint8_t. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_reg_read */ __STATIC_INLINE ret_code_t lps22hb_who_am_i_read(lps22hb_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val); /** * @brief Function for reading interrupt source register. * * @param[in] p_instance Pointer to sensor instance. * @param[in] user_cb Function to be called after register is read. * @param[out] reg_val Register value, single uint8_t. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_reg_read */ __STATIC_INLINE ret_code_t lps22hb_int_source_read(lps22hb_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val); /** * @brief Function for reading fifo status register. * * @param[in] p_instance Pointer to sensor instance. * @param[in] user_cb Function to be called after register is read. * @param[out] reg_val Register value, single uint8_t. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_reg_read */ __STATIC_INLINE ret_code_t lps22hb_fifo_status_read(lps22hb_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val); /** * @brief Function for reading status register. * * @param[in] p_instance Pointer to sensor instance. * @param[in] user_cb Function to be called after register is read. * @param[out] reg_val Register value, single uint8_t. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_reg_read */ __STATIC_INLINE ret_code_t lps22hb_status_read(lps22hb_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val); #ifndef SUPPRESS_INLINE_IMPLEMENTATION __STATIC_INLINE ret_code_t lps22hb_reset_filter(lps22hb_instance_t * p_instance) { ASSERT(p_instance != NULL); static uint8_t temp; return nrf_twi_sensor_reg_read(p_instance->p_sensor_data, p_instance->sensor_addr, LPS22HB_REG_LPFP_RES, NULL, &temp, 1); } __STATIC_INLINE ret_code_t lps22hb_who_am_i_read(lps22hb_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val) { ASSERT(p_instance != NULL); return nrf_twi_sensor_reg_read(p_instance->p_sensor_data, p_instance->sensor_addr, LPS22HB_REG_WHO_AM_I, user_cb, reg_val, 1); } __STATIC_INLINE ret_code_t lps22hb_int_source_read(lps22hb_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val) { ASSERT(p_instance != NULL); return nrf_twi_sensor_reg_read(p_instance->p_sensor_data, p_instance->sensor_addr, LPS22HB_REG_INT_SOURCE, user_cb, reg_val, 1); } __STATIC_INLINE ret_code_t lps22hb_fifo_status_read(lps22hb_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val) { ASSERT(p_instance != NULL); return nrf_twi_sensor_reg_read(p_instance->p_sensor_data, p_instance->sensor_addr, LPS22HB_REG_FIFO_STATUS, user_cb, reg_val, 1); } __STATIC_INLINE ret_code_t lps22hb_status_read(lps22hb_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val) { ASSERT(p_instance != NULL); return nrf_twi_sensor_reg_read(p_instance->p_sensor_data, p_instance->sensor_addr, LPS22HB_REG_STATUS, user_cb, reg_val, 1); } #endif //SUPPRESS_INLINE_IMPLEMENTATION #ifdef __cplusplus } #endif #endif // LPS22HB_H