255e997345
* read() is now readinto() and takes the buffer to write into. * readinto() returns the number of valid samples. * readinto() can be interrupted by ctrl-c. * readinto() API doesn't support signed numbers because it never did. * sample_rate is now required in the constructor because supported values will vary per-port. * 16 bit values are full range. 12 bit samples from RP2040 are stretched in the same way they are for AnalogIn. Fixes #7226
50 lines
2.0 KiB
C
50 lines
2.0 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* SPDX-FileCopyrightText: Copyright (c) 2022 Lee Atkinson, MeanStride Technology, Inc.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2021 Raspberry Pi (Trading) Ltd.
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* https://github.com/raspberrypi/pico-examples/blob/master/adc/dma_capture/dma_capture.c
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGBUFIO_BUFFEREDIN_H
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#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGBUFIO_BUFFEREDIN_H
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#include "common-hal/microcontroller/Pin.h"
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#include "src/rp2_common/hardware_dma/include/hardware/dma.h"
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#include "py/obj.h"
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// This is the analogbufio object
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typedef struct {
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mp_obj_base_t base;
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const mcu_pin_obj_t *pin;
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uint8_t chan;
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uint dma_chan;
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dma_channel_config cfg;
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} analogbufio_bufferedin_obj_t;
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#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGBUFIO_BUFFEREDIN_H
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