You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
circuitpython/atmel-samd/shared_dma.h

47 lines
1.9 KiB

/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
*
* 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_ATMEL_SAMD_SHARED_DMA_H
#define MICROPY_INCLUDED_ATMEL_SAMD_SHARED_DMA_H
#include "asf/sam0/drivers/dma/dma.h"
extern struct dma_resource audio_dma;
extern struct dma_resource general_dma_tx;
extern struct dma_resource general_dma_rx;
volatile bool audio_dma_in_use;
void init_shared_dma(void);
enum status_code shared_dma_write(Sercom* sercom, const uint8_t* buffer, uint32_t length);
enum status_code shared_dma_read(Sercom* sercom, uint8_t* buffer, uint32_t length, uint8_t tx);
// Allocate a counter to track how far along we are in a DMA double buffer.
bool allocate_block_counter(void);
void switch_audiodma_trigger(uint8_t trigger_dmac_id);
#endif // MICROPY_INCLUDED_ATMEL_SAMD_SHARED_DMA_H