rt_inputcapture.h

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/*
 * Copyright (c) 2006-2023, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2019-08-13     balanceTWK   first version.
 */
 
#ifndef __RT_INPUT_CAPTURE_H__
#define __RT_INPUT_CAPTURE_H__
 
#include <rtthread.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* capture control command */
#define INPUTCAPTURE_CMD_CLEAR_BUF        (128 + 0)    /* clear capture buf */
#define INPUTCAPTURE_CMD_SET_WATERMARK    (128 + 1)    /* Set the callback threshold */
 
struct rt_inputcapture_data
{
    rt_uint32_t pulsewidth_us;
    rt_bool_t   is_high;
};
 
struct rt_inputcapture_device
{
    struct rt_device                    parent;
 
    const struct rt_inputcapture_ops    *ops;
    struct rt_ringbuffer                *ringbuff;
    rt_size_t                           watermark;
};

struct rt_inputcapture_ops
{
    rt_err_t (*init)(struct rt_inputcapture_device *inputcapture);
    rt_err_t (*open)(struct rt_inputcapture_device *inputcapture);
    rt_err_t (*close)(struct rt_inputcapture_device *inputcapture);
    rt_err_t (*get_pulsewidth)(struct rt_inputcapture_device *inputcapture, rt_uint32_t *pulsewidth_us);
};
 
void rt_hw_inputcapture_isr(struct rt_inputcapture_device *inputcapture, rt_bool_t level);
 
rt_err_t rt_device_inputcapture_register(struct rt_inputcapture_device *inputcapture,
                                         const char                    *name,
                                         void                          *data);
#ifdef __cplusplus
}
#endif
 
#endif /* __RT_INPUT_CAPTURE_H__ */