DMA

Macros
#define	DMA_TRANSFER(_dst, _src, count, ch, mode)
	General purpose DMA transfer macro.

Functions
INLINE void	dma_cpy (void *dst, const void *src, uint count, uint ch, u32 mode)
	Generic DMA copy routine.
INLINE void	dma_fill (void *dst, volatile u32 src, uint count, uint ch, u32 mode)
	Generic DMA fill routine.
INLINE void	dma3_cpy (void *dst, const void *src, uint size)
	Specific DMA copier, using channel 3, word transfers.
INLINE void	dma3_fill (void *dst, volatile u32 src, uint size)
	Specific DMA filler, using channel 3, word transfers.

Detailed Description

Macro Definition Documentation

DMA_TRANSFER

#define DMA_TRANSFER	(		_dst,
			_src,
			count,
			ch,
			mode
	)

Value:

do {                                        \
    REG_DMA[ch].cnt= 0;                     \
    REG_DMA[ch].src= (const void*)(_src);   \
    REG_DMA[ch].dst= (void*)(_dst);         \
    REG_DMA[ch].cnt= (count) | (mode);      \
} while(0)

General purpose DMA transfer macro.

Parameters

_dst	Destination address.
_src	Source address.
count	Number of transfers.
ch	DMA channel.
mode	DMA mode.

Function Documentation

dma3_cpy()

INLINE void dma3_cpy	(	void *	dst,
		const void *	src,
		uint	size
	)

Specific DMA copier, using channel 3, word transfers.

Parameters

dst	Destination address.
src	Source address.
size	Number of bytes to copy

Note

size is the number of bytes

References dma_cpy().

dma3_fill()

INLINE void dma3_fill	(	void *	dst,
		volatile u32	src,
		uint	size
	)

Specific DMA filler, using channel 3, word transfers.

Parameters

dst	Destination address.
src	Source value.
size	Number of bytes to copy

Note

size is the number of bytes

References dma_fill().

dma_cpy()

INLINE void dma_cpy	(	void *	dst,
		const void *	src,
		uint	count,
		uint	ch,
		u32	mode
	)

Generic DMA copy routine.

Parameters

dst	Destination address.
src	Source address.
count	Number of copies to perform.
ch	DMA channel.
mode	DMA transfer mode.

Note

count is the number of copies, not the size in bytes.

References REG_DMA.

Referenced by dma3_cpy().

dma_fill()

INLINE void dma_fill	(	void *	dst,
		volatile u32	src,
		uint	count,
		uint	ch,
		u32	mode
	)

Generic DMA fill routine.

Parameters

dst	Destination address.
src	Source value.
count	Number of copies to perform.
ch	DMA channel.
mode	DMA transfer mode.

Note

count is the number of copies, not the size in bytes.

References DMA_SRC_FIXED, and REG_DMA.

Referenced by dma3_fill().