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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 HTS221_H #define HTS221_H #include "nrf_twi_sensor.h" #include "hts221_internal.h" #ifdef __cplusplus extern "C" { #endif /** * @brief Possible sensor addresses. */ #define HTS221_BASE_ADDRESS 0x5FU // Who am I default value. #define HTS221_WHO_AM_I 0xBC // Minimal TWI Manager queue size needed for sensor. #define HTS221_MIN_QUEUE_SIZE 4 /** * @brief Sensor driver usage. * * Sensor instance has to be defined first in global context using @ref HTS221_INSTANCE_DEF. * After that it has to be initialized using @ref hts221_init. * At this point sensor instance is ready and all other functions can be used. * * Configuration 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. * * There are designated functions to read status sensor registers e.g. @ref hts221_status_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 h_da = NRF_TWI_SENSOR_REG_VAL_GET(status, HTS221_H_DA_MASK, HTS221_H_DA_POS); * * Other functions are self-explanatory or have description on their usage. */ /** * @brief Temperature average setting. */ typedef enum { HTS221_TEMP_SAMPLES_2, HTS221_TEMP_SAMPLES_4, HTS221_TEMP_SAMPLES_8, HTS221_TEMP_SAMPLES_16, HTS221_TEMP_SAMPLES_32, HTS221_TEMP_SAMPLES_64, HTS221_TEMP_SAMPLES_128, HTS221_TEMP_SAMPLES_256 } hts221_temp_avg_samples_t; /** * @brief Humidity average setting. */ typedef enum { HTS221_HUMIDITY_SAMPLES_4, HTS221_HUMIDITY_SAMPLES_8, HTS221_HUMIDITY_SAMPLES_16, HTS221_HUMIDITY_SAMPLES_32, HTS221_HUMIDITY_SAMPLES_64, HTS221_HUMIDITY_SAMPLES_128, HTS221_HUMIDITY_SAMPLES_256, HTS221_HUMIDITY_SAMPLES_512 } hts221_hum_avg_samples_t; /** * @brief Output data rate settings. */ typedef enum { HTS221_ODR_ONESHOT, HTS221_ODR_1HZ, HTS221_ODR_7HZ, HTS221_ODR_12_5HZ, } hts221_odr_t; /** * @brief Data callback prototype. * * @param[in] result Return error code from TWI manager and underlying drivers. * @param[in] p_data Pointer to sensor data. */ typedef void (* hts221_data_callback_t)(ret_code_t result, int16_t * p_data); /** * @brief Macro creating hts221 sensor instance. * * @param[in] _hts221_inst_name Sensor instance name. * @param[in] _p_twi_sensor Pointer to common TWI sensor instance. @ref NRF_TWI_SENSOR_DEF * @param[in] _sensor_address Sensor base address. */ #define HTS221_INSTANCE_DEF(_hts221_inst_name, _p_twi_sensor, _sensor_address) \ HTS221_INTERNAL_INSTANCE_DEF(_hts221_inst_name, _p_twi_sensor, _sensor_address) /** * @brief Function initializing hts221 sensor * * Writes configuration from sensor instance into sensor. * * @param[in] p_instance Pointer to sensor instance created by macro * * @note TWI manager queue size has to be at least * HTS221_MIN_QUEUE_SIZE element long. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t hts221_init(hts221_instance_t * p_instance); /** * @brief Function for setting average configuration. * * @param[in] p_instance Pointer to sensor instance. * @param[in] temp_avg Number of temperature average samples. * @param[in] hum_avg Number of humidity average samples. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t hts221_avg_cfg(hts221_instance_t * p_instance, hts221_temp_avg_samples_t temp_avg, hts221_hum_avg_samples_t hum_avg); /** * @brief Function for setting power down mode * * @param[in] p_instance Pointer to sensor instance. * @param[in] enable True if device is powered, false if power down. * * @note Changes made by this function don't take effect before @ref hts221_cfg_commit */ ret_code_t hts221_pd_enable(hts221_instance_t * p_instance, bool enable); /** * @brief Function for rebooting sensor. * * @param[in] p_instance Pointer to sensor instance. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t hts221_boot(hts221_instance_t * p_instance); /** * @brief Function for setting heater. * * @param[in] p_instance Pointer to sensor instance. * @param[in] enable True if heater is on. * * @note Changes made by this function don't take effect before @ref hts221_cfg_commit */ ret_code_t hts221_heater_enable(hts221_instance_t * p_instance, bool enable); /** * @brief Function for setting one shot mode * * @param[in] p_instance Pointer to sensor instance. * @param[in] enable True if one shot mode is on. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t hts221_oneshot(hts221_instance_t * p_instance); /** * @brief Function for setting sensor_data ready output signal. * * @param[in] p_instance Pointer to sensor instance. * @param[in] active_low True if active low, false if active high. * @param[in] open_drain True if open drain, false if push-pull. * @param[in] drdy_enable True if pin is enabled. * * @note Changes made by this function don't take effect before @ref hts221_cfg_commit */ ret_code_t hts221_drdy_pin_cfg(hts221_instance_t * p_instance, bool active_low, bool operation, bool drdy_enable); /** * @brief Function for setting output data rate. * * @param[in] p_instance Pointer to sensor instance. * @param[in] odr Desired output data rate. * * @note Changes made by this function don't take effect before @ref hts221_cfg_commit */ ret_code_t hts221_data_rate_cfg(hts221_instance_t * p_instance, hts221_odr_t odr); /** * @brief Function for reading sensors temperature. * * @param[in] p_instance Pointer to sensor instance. * @param[in] user_callback Function to be called when sensor data is gathered. * @param[out] p_temp Pointer for raw temperature value, single int16_t. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_reg_read */ ret_code_t hts221_temp_read(hts221_instance_t * p_instance, hts221_data_callback_t user_callback, int16_t * p_temp); /** * @brief Function for calculating temperature based on sensors calibration data. * * @param[in] p_instance Pointer to sensor instance. * @param[in] raw_temp Raw temperature in. * * @return Temperature * 8 */ int16_t hts221_temp_process(hts221_instance_t * p_instance, int16_t raw_temp); /** * @brief Function for reading sensors humidity. * * @param[in] p_instance Pointer to sensor instance. * @param[in] user_callback Function to be called when data is gathered. * @param[out] p_hum Pointer for raw humidity value, single int16_t. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_reg_read */ ret_code_t hts221_hum_read(hts221_instance_t * p_instance, hts221_data_callback_t user_callback, int16_t * p_hum); /** * @brief Function for calculating humidity based on sensors calibration data. * * @param[in] p_instance Pointer to sensor instance. * @param[in] raw_hum Raw humidity in. * * @return Humidity * 2 */ int16_t hts221_hum_process(hts221_instance_t * p_instance, int16_t raw_hum); /** * @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 hts221_who_am_i_read(hts221_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 hts221_status_read(hts221_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val); #ifdef __cplusplus } #endif #endif // HTS221_H