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/*
* Copyright (c) 2017 Samsung Electronics Co., Ltd.
*
* Contact: Jin Yoon <jinny.yoon@samsung.com>
* Geunsun Lee <gs86.lee@samsung.com>
* Eunyoung Lee <ey928.lee@samsung.com>
* Junkyu Han <junkyu.han@samsung.com>
*
* Licensed under the Flora License, Version 1.1 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://floralicense.org/license/
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __POSITION_FINDER_RESOURCE_ULTRASONIC_SENSOR_H__
#define __POSITION_FINDER_RESOURCE_ULTRASONIC_SENSOR_H__
/**
* @brief Reads the value of gpio connected ultrasonic sensor(HC-SR04).
* @param[in] trig_pin_num The number of the gpio pin connected to the trig of the ultrasonic sensor
* @param[in] echo_pin_num The number of the gpio pin connected to the echo of the ultrasonic sensor
* @param[in] cb A callback function to be invoked when the gpio interrupt is triggered
* @param[in] data The data to be passed to the callback function
* @return 0 on success, otherwise a negative error value
* @see If the gpio pin is not open, creates gpio handle before reading the value of gpio.
*/
extern int resource_read_ultrasonic_sensor(int trig_pin_num, int echo_pin_num, resource_read_cb cb, void *data);
#endif /* __POSITION_FINDER_RESOURCE_ULTRASONIC_SENSOR_H__ */
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