pulse_counter.h

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/*
 * Copyright (C) 2017 UC Berkeley
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once

 
#include <stdint.h>
#ifdef __cplusplus
#include "c11_atomics_compat.hpp"
#else
#include <stdatomic.h>
#endif
#include "periph/gpio.h"
 
#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    gpio_t       gpio;         
    gpio_flank_t gpio_flank;   
} pulse_counter_params_t;

typedef struct {
    atomic_uint_least16_t pulse_count;  
} pulse_counter_t;

int pulse_counter_init(pulse_counter_t *dev, const pulse_counter_params_t *params);

int16_t pulse_counter_read_with_reset(pulse_counter_t *dev);

int16_t pulse_counter_read_without_reset(pulse_counter_t *dev);

void pulse_counter_reset(pulse_counter_t *dev);
 
#ifdef __cplusplus
}
#endif