66 lines
2.8 KiB
C
66 lines
2.8 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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void dma_suspend_channel(uint8_t channel_number);
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void dma_resume_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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