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msh_dma.h File Reference

DMA functions. More...

Data Structures
struct	_dma_t
Defines
#define	dma(channel, dst, src, length, attr)   DMA(channel, dst, src, length, attr)
#define	set_dma_src(channel, src)   SET_DMA_SRC(channel, src)
#define	set_dma_dst(channel, dst)   SET_DMA_DST(channel, dst)
#define	set_dma_cnt_l(channel, cnt_l)   SET_DMA_CNT_L(channel, cnt_l)
#define	set_dma_cnt_h(channel, cnt_h)   SET_DMA_CNT_H(channel, cnt_h)
#define	set_dma_irq(channel, irq)   SET_DMA_IRQ(channel, irq)
#define	get_dma_irq(channel)   GET_DMA_IRQ(channel)
#define	dmemcpy(channel, dst, src, size)   DMEMCPY(channel, dst, src, size)

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Detailed Description

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Define Documentation

#define DMA (  channel, dst, src, length, attr    )

Value: {GET_DMA_DST(channel) = (u32)(dst); \ GET_DMA_SRC(channel) = (u32)(src); \ GET_DMA_CNT_L(channel) = (length); \ GET_DMA_CNT_H(channel) = (attr);}

#define SET_DMA_IRQ (  channel, irq    )

Value: {GET_DMA_CNT_H(channel) &= _DMA_IRQ_MASK; \ GET_DMA_CNT_H(channel) |= (irq) << _DMA_IRQ_POS;}

#define DMEMCPY (  channel, dst, src, size    )

Value: {if ((channel) <= 3) { \ DMACPY16(channel, dst, src, (size) >> 1) \ } else { \ memcpy(dst, src, size); \ }}

#define DMASET16 (  channel, dst, val, size    )

Value: {_dmaset16_value = (val); \ DMA(channel, dst, &_dmaset16_value, size, DMA_SRC_UNMOD | DMA_SIZE_16 | DMA_ENABLE | DMA_START_NOW);}

#define DMASET32 (  channel, dst, val, size    )

Value: {_dmaset32_value = (val); \ DMA(channel, dst, &_dmaset32_value, size, DMA_SRC_UNMOD | DMA_SIZE_32 | DMA_ENABLE | DMA_START_NOW);}

#define dma (  channel, dst, src, length, attr    )     DMA(channel, dst, src, length, attr)

Parameters: channel  u8 [0..3] DMA Channel dst  void* Destination Address src  void* Source Address length  u16 Number of 16/32 bit values to copy attr  u16 [DMA] DMA Control Attributes Add multiple DMA attributes using the bitwise OR operator. DMA Attribute defines: */ #define DMA_DST_INC #define DMA_DST_DEC #define DMA_DST_UNMOD #define DMA_DST_INCRL #define DMA_SRC_INC #define DMA_SRC_DEC #define DMA_SRC_UNMOD #define DMA_REPEAT #define DMA_SIZE_16 #define DMA_SIZE_32 #define DMA_START_NOW #define DMA_START_VBL #define DMA_START_HBL #define DMA_START_FIFO #define DMA_IRQ #define DMA_ENABLE

#define set_dma_src (  channel, src    )     SET_DMA_SRC(channel, src)

Parameters: channel  u8 [0..3] DMA Channel src  void* Source Address

#define set_dma_dst (  channel, dst    )     SET_DMA_DST(channel, dst)

Parameters: channel  u8 [0..3] DMA Channel dst  void* Destination Address

#define set_dma_cnt_l (  channel, cnt_l    )     SET_DMA_CNT_L(channel, cnt_l)

Parameters: channel  u8 [0..3] DMA Channel cnt_l  u16 Number of 16/32 bit values to copy

#define set_dma_cnt_h (  channel, cnt_h    )     SET_DMA_CNT_H(channel, cnt_h)

Parameters: channel  u8 [0..3] DMA Channel cnt_h  u16 [DMA] DMA Control Attributes Add multiple DMA attributes using the bitwise OR operator. DMA Attribute defines: */ #define DMA_DST_INC #define DMA_DST_DEC #define DMA_DST_UNMOD #define DMA_DST_INCRL #define DMA_SRC_INC #define DMA_SRC_DEC #define DMA_SRC_UNMOD #define DMA_REPEAT #define DMA_SIZE_16 #define DMA_SIZE_32 #define DMA_START_NOW #define DMA_START_VBL #define DMA_START_HBL #define DMA_START_FIFO #define DMA_IRQ #define DMA_ENABLE

#define set_dma_irq (  channel, irq    )     SET_DMA_IRQ(channel, irq)

Parameters: channel  u8 [0..3] DMA Channel irq  bool [TRUE or FALSE] Enable/Disable IRQ

#define get_dma_irq (  channel    )     GET_DMA_IRQ(channel)

Parameters: channel  u8 [0..3] DMA Channel Returns: bool [TRUE or FALSE] Enable/Disable IRQ

#define dmemcpy (  channel, dst, src, size    )     DMEMCPY(channel, dst, src, size)

Parameters: channel  u8 [CPY] Copy type dst  void* Destination Address src  void* Source Address size  u32 Number of bytes to copy Copies data using a DMA channel or using memcpy() if the channel is set to CPY_MEMCPY. size must be a multiple of 2 if using DMA. dmemcpy() type defines: These are Mushroom specific, not GBA values. */ #define CPY_DMA0 #define CPY_DMA1 #define CPY_DMA2 #define CPY_DMA3 #define CPY_MEMCPY

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