1 /* 2 * Copyright (c) 2023 Huawei Device Co., Ltd. 3 * 4 * HDF is dual licensed: you can use it either under the terms of 5 * the GPL, or the BSD license, at your option. 6 * See the LICENSE file in the root of this repository for complete details. 7 */ 8 9 #ifndef HUMIDITY_AHT20_H 10 #define HUMIDITY_AHT20_H 11 12 #include "sensor_config_parser.h" 13 #include "sensor_humidity_driver.h" 14 15 /* Humidity registers addr */ 16 #define AHT20_HUM_STATUS_ADDR 0x71 // Status 17 #define AHT20_HUM_RESET_ADDR 0xBA 18 19 #define AHT20_HUM_MEASURE_ADDR 0xAC // Measure 20 #define AHT20_HUM_MEASURE_ARG0 0x33 21 #define AHT20_HUM_MEASURE_ARG1 0x00 22 23 #define AHT20_HUM_CALIBRATION_ADDR 0xBE // Calibration 24 #define AHT20_HUM_CALIBRATION_ARG0 0x08 25 #define AHT20_HUM_CALIBRATION_ARG1 0x00 26 27 /* Humidity data */ 28 #define AHT20_HUM_DATA_BUF_LEN 6 29 #define AHT20_HUM_VALUE_IDX_ZERO 0 30 #define AHT20_HUM_VALUE_IDX_ONE 1 31 #define AHT20_HUM_VALUE_IDX_TWO 2 32 #define AHT20_HUM_VALUE_IDX_THREE 3 33 #define AHT20_HUM_VALUE_IDX_FOUR 4 34 #define AHT20_HUM_VALUE_IDX_FIVE 5 35 36 #define AHT20_HUM_BUSY_SHIFT 7 37 #define AHT20_HUM_BUSY_MASK (0x1 << AHT20_HUM_BUSY_SHIFT) 38 #define AHT20_HUM_IS_BUSY(status) (((status) & AHT20_HUM_BUSY_MASK) >> AHT20_HUM_BUSY_SHIFT) 39 40 #define AHT20_HUM_CALI_SHIFT 3 41 #define AHT20_HUM_CALI_MASK (0x1 << AHT20_HUM_CALI_SHIFT) 42 #define AHT20_HUM_IS_CALI(status) (((status) & AHT20_HUM_CALI_MASK) >> AHT20_HUM_CALI_SHIFT) 43 44 #define AHT20_HUM_DELAY_MS 80 45 #define AHT20_HUM_STARTUP_MS 20 46 #define AHT20_HUM_CALIBRATION_MS 40 47 48 #define AHT20_HUM_SHFIT_FOUR_BITS 4 49 #define AHT20_HUM_SHFIT_EIGHT_BITS 8 50 #define AHT20_HUM_MASK 0xF0 51 52 #define AHT20_HUM_SLOPE 10000 // 100 * 100.0 53 #define AHT20_HUM_RESOLUTION (0x1 << 20) 54 #define AHT20_HUM_RETRY_TIMES 5 55 56 struct Aht20DrvData { 57 struct IDeviceIoService ioService; 58 struct HdfDeviceObject *device; 59 struct SensorCfgData *sensorCfg; 60 }; 61 62 #endif /* HUMIDITY_AHT20_H */ 63