circuitpython/ports/atmel-samd/common-hal/pulseio/PulseIn.h

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_PULSEIO_PULSEIN_H
#define MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_PULSEIO_PULSEIN_H

#include "common-hal/microcontroller/Pin.h"

#include "py/obj.h"

typedef struct {
    mp_obj_base_t base;
    uint8_t channel;
    uint8_t pin;
    uint16_t *buffer;
    uint16_t maxlen;
    bool idle_state;
    volatile uint16_t start;
    volatile uint16_t len;
    volatile bool first_edge;
    volatile uint32_t last_overflow;
    volatile uint16_t last_count;
    volatile bool errored_too_fast;
} pulseio_pulsein_obj_t;

void pulsein_reset(void);

void pulsein_interrupt_handler(uint8_t channel);
void pulsein_timer_interrupt_handler(uint8_t index);
#ifdef SAMD21
void rtc_start_pulse(void);
void rtc_end_pulse(void);
#endif


#endif // MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_PULSEIO_PULSEIN_H