IDMA3 (C64P)

Data Structures
struct	IDMA3_MemRec
	Record containing attributes of the IDMA3 Channel environment memory when (optionally) the IDMA3 Channel is requested with a non-NULL IDMA3_ProtocolObj. More...
struct	IDMA3_ChannelRec
	DMA Channel Descriptor to logical DMA channels. More...
struct	IDMA3_Fxns
	These fxns are used to query/grant the DMA resources requested by the algorithm at initialization time, and to change these resources at runtime. All these fxns are implemented by the algorithm, and called by the client of the algorithm. More...
struct	IDMA3_ProtocolObj
	These functions are used to determine memory requirements for and initialize the IDMA3 protocol's environment that will be allocated by the DMA manager. More...
struct	IDMA3_Obj
	IDMA3_Obj holds the private state associated with each logical DMA channel. More...
Defines
#define	IDMA3_PROTOCOL_NULL ((IDMA3_ProtocolHandle)NULL)
	NULL protocol definition.
Typedefs
typedef struct IDMA3_Obj *	IDMA3_Handle
	Handle to "logical" DMA channel.
typedef struct IDMA3_ProtocolObj *	IDMA3_ProtocolHandle
	Handle to IDMA3 protocol object.
Enumerations
enum	IDMA3_MemType { IDMA3_INTERNAL, IDMA3_EXTERNAL }
	Memory space descriptors for IDMA3_MemRec. More...
enum	IDMA3_Priority { IDMA3_PRIORITY_URGENT, IDMA3_PRIORITY_HIGH, IDMA3_PRIORITY_MEDIUM, IDMA3_PRIORITY_LOW }
	IDMA3 Priority Levels. More...

Detailed Description

The IDMA3 interface enables algorithms to request and receive handles representing private logical DMA resources.

Define Documentation

#define IDMA3_PROTOCOL_NULL ((IDMA3_ProtocolHandle)NULL)

NULL protocol definition.

The NULL protocol can be used when no protocol is needed, e.g. when the algorithm directly accesses the eDMA PaRAM registers, or when the DMA driver library used does not retain any state. When the NULL protocol is used 'env' buffer is not allocated