49 lines
2.1 KiB
C
49 lines
2.1 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 "asf/sam0/drivers/dma/dma.h"
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extern struct dma_resource audio_dma;
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extern struct dma_resource general_dma_tx;
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extern struct dma_resource general_dma_rx;
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volatile bool audio_dma_in_use;
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void init_shared_dma(void);
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enum status_code shared_dma_write(Sercom* sercom, const uint8_t* buffer, uint32_t length);
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enum status_code shared_dma_read(Sercom* sercom, uint8_t* buffer, uint32_t length, uint8_t tx);
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enum status_code shared_dma_transfer(Sercom* sercom, uint8_t* buffer_out, uint8_t* buffer_in, uint32_t length, uint8_t tx);
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// Allocate a counter to track how far along we are in a DMA double buffer.
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bool allocate_block_counter(void);
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void switch_audiodma_trigger(uint8_t trigger_dmac_id);
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#endif // MICROPY_INCLUDED_ATMEL_SAMD_SHARED_DMA_H
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