Gan likun / mbed1-dev

001

hal/dma_api.h@0:13413ea9a877, 2022-06-12 (annotated)

Committer:
ganlikun
Date:
Sun Jun 12 14:02:44 2022 +0000
Revision:
0:13413ea9a877
00

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ganlikun 0:13413ea9a877 1
ganlikun 0:13413ea9a877 2 /** \addtogroup hal */
ganlikun 0:13413ea9a877 3 /** @{*/
ganlikun 0:13413ea9a877 4 /* mbed Microcontroller Library
ganlikun 0:13413ea9a877 5 * Copyright (c) 2014-2015 ARM Limited
ganlikun 0:13413ea9a877 6 *
ganlikun 0:13413ea9a877 7 * Licensed under the Apache License, Version 2.0 (the "License");
ganlikun 0:13413ea9a877 8 * you may not use this file except in compliance with the License.
ganlikun 0:13413ea9a877 9 * You may obtain a copy of the License at
ganlikun 0:13413ea9a877 10 *
ganlikun 0:13413ea9a877 11 * http://www.apache.org/licenses/LICENSE-2.0
ganlikun 0:13413ea9a877 12 *
ganlikun 0:13413ea9a877 13 * Unless required by applicable law or agreed to in writing, software
ganlikun 0:13413ea9a877 14 * distributed under the License is distributed on an "AS IS" BASIS,
ganlikun 0:13413ea9a877 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ganlikun 0:13413ea9a877 16 * See the License for the specific language governing permissions and
ganlikun 0:13413ea9a877 17 * limitations under the License.
ganlikun 0:13413ea9a877 18 */
ganlikun 0:13413ea9a877 19 #ifndef MBED_DMA_API_H
ganlikun 0:13413ea9a877 20 #define MBED_DMA_API_H
ganlikun 0:13413ea9a877 21
ganlikun 0:13413ea9a877 22 #include <stdint.h>
ganlikun 0:13413ea9a877 23
ganlikun 0:13413ea9a877 24 #define DMA_ERROR_OUT_OF_CHANNELS (-1)
ganlikun 0:13413ea9a877 25
ganlikun 0:13413ea9a877 26 typedef enum {
ganlikun 0:13413ea9a877 27 DMA_USAGE_NEVER,
ganlikun 0:13413ea9a877 28 DMA_USAGE_OPPORTUNISTIC,
ganlikun 0:13413ea9a877 29 DMA_USAGE_ALWAYS,
ganlikun 0:13413ea9a877 30 DMA_USAGE_TEMPORARY_ALLOCATED,
ganlikun 0:13413ea9a877 31 DMA_USAGE_ALLOCATED
ganlikun 0:13413ea9a877 32 } DMAUsage;
ganlikun 0:13413ea9a877 33
ganlikun 0:13413ea9a877 34 #ifdef __cplusplus
ganlikun 0:13413ea9a877 35 extern "C" {
ganlikun 0:13413ea9a877 36 #endif
ganlikun 0:13413ea9a877 37
ganlikun 0:13413ea9a877 38 void dma_init(void);
ganlikun 0:13413ea9a877 39
ganlikun 0:13413ea9a877 40 int dma_channel_allocate(uint32_t capabilities);
ganlikun 0:13413ea9a877 41
ganlikun 0:13413ea9a877 42 int dma_channel_free(int channelid);
ganlikun 0:13413ea9a877 43
ganlikun 0:13413ea9a877 44 #ifdef __cplusplus
ganlikun 0:13413ea9a877 45 }
ganlikun 0:13413ea9a877 46 #endif
ganlikun 0:13413ea9a877 47
ganlikun 0:13413ea9a877 48 #endif
ganlikun 0:13413ea9a877 49
ganlikun 0:13413ea9a877 50 /** @}*/
ganlikun 0:13413ea9a877 51