117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
/**
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*****************************************************************************
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* @file cmem7_dma.h
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*
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* @brief CMEM7 DMA header file
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*
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*
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* @version V1.0
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* @date 3. September 2013
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*
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* @note
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*
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*****************************************************************************
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* @attention
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*
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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* TIME. AS A RESULT, CAPITAL-MICRO SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*
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* <h2><center>© COPYRIGHT 2013 Capital-micro </center></h2>
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*****************************************************************************
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*/
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#ifndef __CMEM7_DMA_H
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#define __CMEM7_DMA_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "cmem7.h"
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#include "cmem7_conf.h"
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/** @defgroup DMA_Int
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* @{
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*/
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#define DMA_Int_TfrComplete 0x00000001
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#define DMA_Int_Err 0x00000002
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#define DMA_Int_All 0x00000003
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#define IS_DMA_INT(INT) (((INT) != 0) && (((INT) & ~DMA_Int_All) == 0))
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/**
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* @}
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*/
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/**
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* @brief Descriptor structure
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* @note DMA requires users provides a list of descriptors to operation.
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* Meanwhile, memory occupied by descriptors should be in physical
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* memory and keep valid during DMA transfer.
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*/
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typedef struct {
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uint32_t srcAddr; /*!< source address */
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uint32_t dstAddr; /*!< destination address */
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uint32_t number; /*!< block byte number, no more than 2K Bytes */
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uint32_t nextBlock; /*!< next block descriptor */
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uint32_t padding; /*!< Nonsense, only used to fill */
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} BLOCK_DESC;
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/**
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* @brief DMA initialization
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* @note This function should be called at first before any other interfaces.
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* @param None
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* @retval None
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*/
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void DMA_Init(void);
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/**
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* @brief Enable or disable DMA interrupt.
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* @param[in] Int interrupt mask bits, which can be the combination of @ref DMA_Int
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* @param[in] Enable The bit indicates if specific interrupts are enable or not
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* @retval None
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*/
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void DMA_EnableInt(uint32_t Int, BOOL enable);
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/**
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* @brief Check specific interrupts are set or not
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* @param[in] Int interrupt mask bits, which can be the combination of @ref DMA_Int
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* @retval BOOL The bit indicates if specific interrupts are set or not
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*/
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BOOL DMA_GetIntStatus(uint32_t Int);
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/**
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* @brief Clear specific interrupts
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* @param[in] Int interrupt mask bits, which can be the combination of @ref DMA_Int
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* @retval None
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*/
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void DMA_ClearInt(uint32_t Int);
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/**
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* @brief DMA transfer
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* @note Make sure that memory occupied by descriptors should be in physical
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* memory and keep valid before DMA transfer is finished (Return false by
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* calling DMA_IsBusy after DMA transfer started).
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* @param[in] blockList A pointer to header of list of BLOCK_DESC
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* @retval BOOL The bit indicates if DMA begins to transfer
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* @see DMA_IsBusy
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*/
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BOOL DMA_Transfer(BLOCK_DESC *blockList);
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/**
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* @brief DMA is busy or not
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* @param None
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* @retval BOOL The bit indicates if DMA is busy or not
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*/
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BOOL DMA_IsBusy(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __CMEM7_DMA_H */
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