source:
EcnlProtoTool/trunk/asp3_dcre/mbed/hal/dma_api.h
Last change on this file was 429, checked in by , 4 years ago | |
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1 | |
2 | /** \addtogroup hal */ |
3 | /** @{*/ |
4 | /* mbed Microcontroller Library |
5 | * Copyright (c) 2014-2015 ARM Limited |
6 | * |
7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
8 | * you may not use this file except in compliance with the License. |
9 | * You may obtain a copy of the License at |
10 | * |
11 | * http://www.apache.org/licenses/LICENSE-2.0 |
12 | * |
13 | * Unless required by applicable law or agreed to in writing, software |
14 | * distributed under the License is distributed on an "AS IS" BASIS, |
15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
16 | * See the License for the specific language governing permissions and |
17 | * limitations under the License. |
18 | */ |
19 | #ifndef MBED_DMA_API_H |
20 | #define MBED_DMA_API_H |
21 | |
22 | #include <stdint.h> |
23 | |
24 | #define DMA_ERROR_OUT_OF_CHANNELS (-1) |
25 | |
26 | typedef enum { |
27 | DMA_USAGE_NEVER, |
28 | DMA_USAGE_OPPORTUNISTIC, |
29 | DMA_USAGE_ALWAYS, |
30 | DMA_USAGE_TEMPORARY_ALLOCATED, |
31 | DMA_USAGE_ALLOCATED |
32 | } DMAUsage; |
33 | |
34 | #ifdef __cplusplus |
35 | extern "C" { |
36 | #endif |
37 | |
38 | void dma_init(void); |
39 | |
40 | int dma_channel_allocate(uint32_t capabilities); |
41 | |
42 | int dma_channel_free(int channelid); |
43 | |
44 | #ifdef __cplusplus |
45 | } |
46 | #endif |
47 | |
48 | #endif |
49 | |
50 | /** @}*/ |
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