test
Diff: dma_api.h
- Revision:
- 0:e1a608bb55e8
diff -r 000000000000 -r e1a608bb55e8 dma_api.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/dma_api.h Thu Apr 07 18:33:58 2016 +0100 @@ -0,0 +1,45 @@ +/* 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