Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

hal/dma_api.h@1:3deb71413561, 2017-07-20 (annotated)

Committer:
xuaner
Date:
Thu Jul 20 14:26:57 2017 +0000
Revision:
1:3deb71413561
Parent:
0:f269e3021894 
mbed_os

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1
elessair 0:f269e3021894 2 /** \addtogroup hal */
elessair 0:f269e3021894 3 /** @{*/
elessair 0:f269e3021894 4 /* mbed Microcontroller Library
elessair 0:f269e3021894 5 * Copyright (c) 2014-2015 ARM Limited
elessair 0:f269e3021894 6 *
elessair 0:f269e3021894 7 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 8 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 9 * You may obtain a copy of the License at
elessair 0:f269e3021894 10 *
elessair 0:f269e3021894 11 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 12 *
elessair 0:f269e3021894 13 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 14 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 16 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 17 * limitations under the License.
elessair 0:f269e3021894 18 */
elessair 0:f269e3021894 19 #ifndef MBED_DMA_API_H
elessair 0:f269e3021894 20 #define MBED_DMA_API_H
elessair 0:f269e3021894 21
elessair 0:f269e3021894 22 #include <stdint.h>
elessair 0:f269e3021894 23
elessair 0:f269e3021894 24 #define DMA_ERROR_OUT_OF_CHANNELS (-1)
elessair 0:f269e3021894 25
elessair 0:f269e3021894 26 typedef enum {
elessair 0:f269e3021894 27 DMA_USAGE_NEVER,
elessair 0:f269e3021894 28 DMA_USAGE_OPPORTUNISTIC,
elessair 0:f269e3021894 29 DMA_USAGE_ALWAYS,
elessair 0:f269e3021894 30 DMA_USAGE_TEMPORARY_ALLOCATED,
elessair 0:f269e3021894 31 DMA_USAGE_ALLOCATED
elessair 0:f269e3021894 32 } DMAUsage;
elessair 0:f269e3021894 33
elessair 0:f269e3021894 34 #ifdef __cplusplus
elessair 0:f269e3021894 35 extern "C" {
elessair 0:f269e3021894 36 #endif
elessair 0:f269e3021894 37
elessair 0:f269e3021894 38 void dma_init(void);
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 int dma_channel_allocate(uint32_t capabilities);
elessair 0:f269e3021894 41
elessair 0:f269e3021894 42 int dma_channel_free(int channelid);
elessair 0:f269e3021894 43
elessair 0:f269e3021894 44 #ifdef __cplusplus
elessair 0:f269e3021894 45 }
elessair 0:f269e3021894 46 #endif
elessair 0:f269e3021894 47
elessair 0:f269e3021894 48 #endif
elessair 0:f269e3021894 49
elessair 0:f269e3021894 50 /** @}*/