Return to previous page ｜ Return to menu ｜ Go to next page

2.2 Data specifications

[Low level SCU] 

  Title  
 Data specifications 
  Data  
 DMA channel 
  Data name  
 None 
No
1

Use the following constants to specify the SCU DMA channel. 

 Constant 
 Description 
 DMA_SCU_CH0 
 Channel 0 
 DMA_SCU_CH1 
 Channel 1 
 DMA_SCU_CH2 
 Channel 2 

  Title  
 Data specifications 
  Data  
 Transfer parameters 
  Data name  
 DmaScuPrm 
No
2

The

transfer parameter has the following structure. 

struct      {
     Uint32 dxr; / * Read address * /
     Uint32 dxw; / * Export address * /
     Uint32 dxc; / * Number of bytes transferred * /
     Uint32 dxad_r; / * Read address addition value * /
     Uint32 dxad_w; / * Write address addition value * /
     Uint32 dxmod; / * Mode bit * /
     Uint32 dxrup; / * Read address update bit * /
     Uint32 dxwup; / * Write address update bit * /
     Uint32 dxft; / * Activation factor selection bit * /
     Uint32 msk; / * Mask bit * /
}DmaScuPrm;

The constants that can be used by each member are shown below. 

 dxad_r / * Read address addition value * / 

 Constant 
 Description 
 DMA_SCU_R0 
 Do not add 
 DMA_SCU_R4 
 Add 4 bytes

Return to previous page ｜ Return to menu ｜ Go to next page