mirror of
https://github.com/openharmony/drivers_peripheral.git
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梁鹏辉
229 lines
9.0 KiB
C
229 lines
9.0 KiB
C
/*
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @addtogroup Sensor
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* @{
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*
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* @brief Provides unified APIs for sensor services to access sensor drivers.
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*
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* A sensor service can obtain a sensor driver object or agent and then call APIs provided by this object or agent to
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* access different types of sensor devices based on the sensor IDs, thereby obtaining sensor information,
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* subscribing to or unsubscribing from sensor data, enabling or disabling a sensor,
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* setting the sensor data reporting mode, and setting sensor options such as the accuracy and measurement range.
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*
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* @since 2.2
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*/
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/**
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* @file sensor_if.h
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*
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* @brief Declares the APIs provided by the sensor module for obtaining sensor information, subscribing to or
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* unsubscribing from sensor data, enabling or disabling a sensor, setting the sensor data reporting mode,
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* and setting sensor options such as the accuracy and measurement range.
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*
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* @since 2.2
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* @version 1.0
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*/
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#ifndef SENSOR_IF_H
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#define SENSOR_IF_H
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#include <stdbool.h>
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#include "sensor_type.h"
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#ifdef __cplusplus
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#if __cplusplus
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extern "C" {
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#endif
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#endif /* __cplusplus */
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/**
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* @brief Defines the functions for performing basic operations on sensors.
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*
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* The operations include obtaining sensor information, subscribing to or unsubscribing from sensor data,
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* enabling or disabling a sensor, setting the sensor data reporting mode, and setting sensor options such as
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* the accuracy and measurement range.
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*/
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struct SensorInterface {
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/**
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* @brief Obtains information about all sensors in the system.
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*
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* @param sensorInfo Indicates the double pointer to the information about all sensors in the system.
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* The information about a sensor generally includes the sensor name, sensor vendor, firmware version,
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* hardware version, sensor type ID, sensor ID, maximum measurement range, accuracy, and power. For details,
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* see {@link SensorInformation}.
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* @param count Indicates the pointer to the total number of sensors in the system.
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* @return Returns <b>0</b> if the information is obtained; returns a negative value otherwise.
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*
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* @since 2.2
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* @version 1.0
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*/
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int32_t (*GetAllSensors)(struct SensorInformation **sensorInfo, int32_t *count);
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/**
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* @brief Enables the sensor available in the sensor list based on the specified sensor ID.
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* The subscriber can obtain the sensor data only after the sensor is enabled.
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*
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* @param sensorId Indicates the sensor ID. For details, see {@link SensorTypeTag}.
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* @return Returns <b>0</b> if the sensor is successfully enabled; returns a negative value otherwise.
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*
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* @since 2.2
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* @version 1.0
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*/
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int32_t (*Enable)(int32_t sensorId);
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/**
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* @brief Disables an enabled sensor.
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*
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* @param sensorId Indicates the sensor ID. For details, see {@link SensorTypeTag}.
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* @return Returns <b>0</b> if the sensor is successfully disabled; returns a negative value otherwise.
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*
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* @since 2.2
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* @version 1.0
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*/
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int32_t (*Disable)(int32_t sensorId);
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/**
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* @brief Sets the data sampling interval and data reporting interval for the specified sensor.
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*
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* @param sensorId Indicates the sensor ID. For details, see {@link SensorTypeTag}.
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* @param samplingInterval Indicates the sensor data sampling interval to set, in nanoseconds.
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* @param reportInterval Indicates the sensor data reporting interval, in nanoseconds.
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* @return Returns <b>0</b> if the setting is successful; returns a negative value otherwise.
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*
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* @since 2.2
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* @version 1.0
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*/
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int32_t (*SetBatch)(int32_t sensorId, int64_t samplingInterval, int64_t reportInterval);
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/**
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* @brief Sets the data reporting mode for the specified sensor.
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*
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* @param sensorId Indicates the sensor ID. For details, see {@link SensorTypeTag}.
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* @param mode Indicates the data reporting mode to set. For details, see {@link SensorModeType}.
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* @return Returns <b>0</b> if the sensor data reporting mode is successfully set;
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* returns a negative value otherwise.
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*
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* @since 2.2
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* @version 1.0
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*/
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int32_t (*SetMode)(int32_t sensorId, int32_t mode);
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/**
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* @brief Sets options for the specified sensor, including its measurement range and accuracy.
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*
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* @param sensorId Indicates the sensor ID. For details, see {@link SensorTypeTag}.
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* @param option Indicates the options to set, such as the measurement range and accuracy.
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* @return Returns <b>0</b> if the options are successfully set; returns a negative value otherwise.
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*
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* @since 2.2
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* @version 1.0
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*/
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int32_t (*SetOption)(int32_t sensorId, uint32_t option);
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/**
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* @brief Registers the callback for reporting sensor data to the subscriber.
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*
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* @param groupId Indicates the sensor group ID.
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* The sensorId enumeration value range is 128-160, which means that the medical sensor service is subscribed.
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* It only needs to be subscribed once successfully, and there is no need to subscribe repeatedly.
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* The sensorId enumeration value range is not within 128-160, which means that the traditional sensor
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* is subscribed, and the subscription is successful once.
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* @param cb Indicates the callback to register. For details, see {@link RecordDataCallback}.
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* @return Returns <b>0</b> if the callback is successfully registered; returns a negative value otherwise.
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*
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* @since 2.2
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* @version 1.0
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*/
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int32_t (*Register)(int32_t groupId, RecordDataCallback cb);
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/**
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* @brief Deregisters the callback for reporting sensor data.
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*
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* @param groupId Indicates the sensor group ID.
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* The sensorId enumeration value range is 128-160, which means that the medical sensor service is subscribed.
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* It only needs to cancel the subscription once successfully, and there is no need to
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* cancel the subscription repeatedly. The sensorId enumeration value range is not within 128-160,
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* which means that the traditional sensor is subscribed. You can cancel the subscription once successfully.
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* @param cb Indicates the callback to register. For details, see {@link RecordDataCallback}.
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* @return Returns <b>0</b> if the callback is successfully deregistered; returns a negative value otherwise.
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*
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* @since 2.2
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* @version 1.0
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*/
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int32_t (*Unregister)(int32_t groupId, RecordDataCallback cb);
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/**
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* @brief Obtain the sensor event data in the small system.
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*
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* @param sensorId Indicates the sensor ID. For details, see {@link SensorTypeTag}.
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* @param event Indicates the vector of the sensor event data in the system.
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* The sensor event data includes the sensor ID, sensor algorithm version, data generation time,
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* data options (such as the measurement range and accuracy), data reporting mode, data address, and data length.
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* For details, see {@link HdfSensorEvents}.
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* @return Returns <b>0</b> if the event data is obtained; returns a negative value otherwise.
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*
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* @since 2.2
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* @version 1.0
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*/
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int32_t (*ReadData)(int32_t sensorId, struct SensorEvents *event);
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/**
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* @brief Obtain sensor information for SDC
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*
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* @param sdcSensorInfo Indicates the data of the SDC type.
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* @return Returns <b>0</b> if the event data is obtained; returns a negative value otherwise.
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*
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* @since 4.1
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* @version 2.0
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*/
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int32_t (*GetSdcSensorInfo)(struct SdcSensorInfo sdcSensorInfo[]);
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};
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/**
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* @brief Creates a <b>SensorInterface</b> instance.
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*
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* @param sensorId Indicates the sensor ID. For details, see {@link SensorTypeTag}.
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* You can use the instance to obtain sensor information, subscribe to or unsubscribe from sensor data,
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* enable or disable a sensor, set the sensor data reporting mode, and set the sensor options such as the accuracy and
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* measurement range.
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* @param cb Indicates the callback to register. For details, see {@link RecordDataCallback}.
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* @return Returns a non-zero value if the instance is successfully created; returns <b>0</b> otherwise.
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*
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* @since 2.2
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* @version 1.0
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*/
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const struct SensorInterface *NewSensorInterfaceInstance(void);
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/**
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* @brief Releases the <b>SensorInterface</b> instance.
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*
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* @return Returns <b>0</b> if the instance is successfully released; returns a negative value otherwise.
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*
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* @since 2.2
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* @version 1.0
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*/
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int32_t FreeSensorInterfaceInstance(void);
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#ifdef __cplusplus
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#if __cplusplus
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}
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#endif
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#endif /* __cplusplus */
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#endif /* SENSOR_IF_H */
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/** @} */
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