2013-01-08 22:40:58 +08:00
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/***************************************************************************//**
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* @file drv_dma.c
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* @brief DMA driver of RT-Thread RTOS for EFM32
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* COPYRIGHT (C) 2012, RT-Thread Development Team
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* @author onelife
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* @version 1.0
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*******************************************************************************
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* @section License
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* The license and distribution terms for this file may be found in the file
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* LICENSE in this distribution or at http://www.rt-thread.org/license/LICENSE
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*******************************************************************************
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* @section Change Logs
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* Date Author Notes
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* 2010-12-23 onelife Initial creation for EFM32
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******************************************************************************/
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/***************************************************************************//**
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* @addtogroup efm32
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* @{
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******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include "board.h"
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#include "drv_dma.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/** DMA control block, requires proper alignment. */
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#if defined (__ICCARM__)
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#pragma data_alignment=256
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DMA_DESCRIPTOR_TypeDef dmaControlBlock[DMA_CHAN_COUNT * 2];
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#elif defined (__CC_ARM)
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DMA_DESCRIPTOR_TypeDef dmaControlBlock[DMA_CHAN_COUNT * 2] __attribute__ ((aligned(256)));
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#elif defined (__GNUC__)
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DMA_DESCRIPTOR_TypeDef dmaControlBlock[DMA_CHAN_COUNT * 2] __attribute__ ((aligned(256)));
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#else
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#error Undefined toolkit, need to define alignment
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#endif
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/***************************************************************************//**
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* @brief
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* Initialize DMA hardware
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*
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* @details
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*
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* @note
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******************************************************************************/
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void rt_hw_dma_init(void)
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{
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DMA_Init_TypeDef dmaInit;
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/* Reset */
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DMA_Reset();
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dmaInit.hprot = 0;
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dmaInit.controlBlock = (DMA_DESCRIPTOR_TypeDef *)&dmaControlBlock;
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DMA_Init(&dmaInit);
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NVIC_SetPriority(DMA_IRQn, EFM32_IRQ_PRI_DEFAULT);
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}
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/***************************************************************************//**
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* @}
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******************************************************************************/
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