46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
|
/* 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
|