1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
/* 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
|
