28642ab10d
This evolves the API from 2.x (and breaks it). Playback devices are now separate from the samples themselves. This allows for greater playback flexibility. Two sample sources are audioio.RawSample and audioio.WaveFile. They can both be mono or stereo. They can be output to audioio.AudioOut or audiobusio.I2SOut. Internally, the dma tracking has changed from a TC counting block transfers to an interrupt generated by the block event sent to the EVSYS. This reduces the overhead of each DMA transfer so multiple can occure without using up TCs. Fixes #652. Fixes #522. Huge progress on #263
64 lines
2.7 KiB
C
64 lines
2.7 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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* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
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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_ATMEL_SAMD_SHARED_DMA_H
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#define MICROPY_INCLUDED_ATMEL_SAMD_SHARED_DMA_H
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#include <stdbool.h>
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#include <stdint.h>
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#include "include/sam.h"
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// We allocate DMA resources for the entire lifecycle of the board (not the
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// vm) because the general_dma resource will be shared between the REPL and SPI
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// flash. Both uses must block each other in order to prevent conflict.
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#define AUDIO_DMA_CHANNEL_COUNT 3
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#define DMA_CHANNEL_COUNT (AUDIO_DMA_CHANNEL_COUNT + 2)
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#define SHARED_TX_CHANNEL (DMA_CHANNEL_COUNT - 2)
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#define SHARED_RX_CHANNEL (DMA_CHANNEL_COUNT - 1)
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volatile bool audio_dma_in_use;
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void init_shared_dma(void);
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#ifdef SAMD51
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int32_t qspi_dma_write(uint32_t address, const uint8_t* buffer, uint32_t length);
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int32_t qspi_dma_read(uint32_t address, uint8_t* buffer, uint32_t length);
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#endif
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int32_t sercom_dma_write(Sercom* sercom, const uint8_t* buffer, uint32_t length);
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int32_t sercom_dma_read(Sercom* sercom, uint8_t* buffer, uint32_t length, uint8_t tx);
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int32_t sercom_dma_transfer(Sercom* sercom, const uint8_t* buffer_out, uint8_t* buffer_in, uint32_t length);
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void dma_configure(uint8_t channel_number, uint8_t trigsrc, bool output_event);
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void dma_enable_channel(uint8_t channel_number);
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void dma_disable_channel(uint8_t channel_number);
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bool dma_channel_enabled(uint8_t channel_number);
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uint8_t dma_transfer_status(uint8_t channel_number);
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DmacDescriptor* dma_descriptor(uint8_t channel_number);
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#endif // MICROPY_INCLUDED_ATMEL_SAMD_SHARED_DMA_H
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