DMA_DES

struct DMA_Des_s {
    BYTE DD_Flags;       // channel width; see below
    BYTE DD_Alloc_Chan;  // allocated channel number
    BYTE DD_Req_Mask;    // mask of requested channels; see below
    BYTE DD_Reserved;    // reserved; do not use
};
typedef struct DMA_Des_s DMA_DES;
 

Contains information about DMA descriptors.

Members

DD_Flags

Channel width flags. Can be one of these values.

fDD_BYTE	8-bit channel
fDD_WORD	16-bit channel
fDD_DWORD	32-bit channel

DD_Req_Mask

Mask of requested DMA channels. Bit 0 is set to request channel 0, bit 1 to request channel 1, and so on. More than one bit is set to indicate alternative channel allocations.