Aravind Vadali / mbed-src-RatRacerAV

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hal/dma_api.h

Committer:
mbed_official
Date:
2015-09-30
Revision:
636:a11c0372f0ba
Parent:
525:c320967f86b9

File content as of revision 636:a11c0372f0ba:

/* mbed Microcontroller Library
 * Copyright (c) 2014-2015 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef MBED_DMA_API_H
#define MBED_DMA_API_H

#include <stdint.h>

#define DMA_ERROR_OUT_OF_CHANNELS (-1)

typedef enum {
    DMA_USAGE_NEVER,
    DMA_USAGE_OPPORTUNISTIC,
    DMA_USAGE_ALWAYS,
    DMA_USAGE_TEMPORARY_ALLOCATED,
    DMA_USAGE_ALLOCATED
} DMAUsage;

#ifdef __cplusplus
extern "C" {
#endif

void dma_init(void);

int dma_channel_allocate(uint32_t capabilities);

int dma_channel_free(int channelid);

#ifdef __cplusplus
}
#endif

#endif