1 /* 2 * Copyright (c) 2021, Leonard Pollak 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 /** 8 * @file 9 * @brief Extended public API for Sensirion's SHT4X T/RH sensors 10 * 11 * This exposes an API to the on-chip heater which is specific to 12 * the application/environment and cannot be expressed within the 13 * sensor driver abstraction. 14 */ 15 16 #ifndef ZEPHYR_INCLUDE_DRIVERS_SENSOR_SHT4X_H_ 17 #define ZEPHYR_INCLUDE_DRIVERS_SENSOR_SHT4X_H_ 18 19 #ifdef __cplusplus 20 extern "C" { 21 #endif 22 23 #include <zephyr/drivers/sensor.h> 24 25 /* Maximum temperature above which the heater should not be used */ 26 #define SHT4X_HEATER_MAX_TEMP 65 27 28 enum sensor_attribute_sht4x { 29 /* Heater Power: 0, 1, 2 -> high, med, low */ 30 SENSOR_ATTR_SHT4X_HEATER_POWER = SENSOR_ATTR_PRIV_START, 31 /* Heater Duration: 0, 1 -> long, short */ 32 SENSOR_ATTR_SHT4X_HEATER_DURATION 33 }; 34 35 /** 36 * @brief Fetches data using the on-chip heater. 37 * 38 * Measurement is always done with "high" repeatability. 39 * 40 * @param dev Pointer to the sensor device 41 * 42 * @return 0 if successful, negative errno code if failure. 43 */ 44 int sht4x_fetch_with_heater(const struct device *dev); 45 46 #ifdef __cplusplus 47 } 48 #endif 49 50 #endif /* ZEPHYR_INCLUDE_DRIVERS_SENSOR_SHT4X_H_ */ 51
