circuitpython/ports/raspberrypi/common-hal/analogio/AnalogFastIn.h

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * SPDX-FileCopyrightText: Copyright (c) 2022 Lee Atkinson, MeanStride Technology, Inc.
 * Taken from AnalogIn by Scott Shawcroft for Adafruit Industries
 * Also from DMA_Capture by Luke Wren of Raspberry Pi (Trading) Ltd.
 *
 * 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_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGFASTIN_H
#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGFASTIN_H

#include "common-hal/microcontroller/Pin.h"
#include "src/rp2_common/hardware_dma/include/hardware/dma.h"

#include "py/obj.h"

// We can extend the struct without impact to existing code
typedef struct {
    mp_obj_base_t base;
    const mcu_pin_obj_t *pin;
    uint8_t *buffer;
    uint32_t len;
    uint8_t bytes_per_sample;
    bool samples_signed;
    mp_float_t sample_rate;
    uint8_t chan;
    uint dma_chan;
    dma_channel_config cfg;
} analogio_analogfastin_obj_t;

void analogfastin_init(void);

#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGFASTIN_H