IDMA3_ChannelRec Struct Reference
[IDMA3 (C64P)]

DMA Channel Descriptor to logical DMA channels. More...

#include <idma3.h>

Collaboration diagram for IDMA3_ChannelRec:

[legend]

Data Fields
IDMA3_Handle	handle
Int	numTransfers
Int	numWaits
IDMA3_Priority	priority
IDMA3_ProtocolHandle	protocol
Bool	persistent

---

Detailed Description

DMA Channel Descriptor to logical DMA channels.

---

Field Documentation

IDMA3_Handle IDMA3_ChannelRec::handle

Handle to logical DMA channel

Int IDMA3_ChannelRec::numTransfers

Number of DMA transfers that are submitted using this logical channel handle. Single (==1) or Linked ( >= 2).

Int IDMA3_ChannelRec::numWaits

Number of individual transfers that can be waited in a linked start. (1 for single transfers or for waiting all)

IDMA3_Priority IDMA3_ChannelRec::priority

Relative priority recommendation: High, Medium, Low.

IDMA3_ProtocolHandle IDMA3_ChannelRec::protocol

When non-NULL, the protocol object provides interface for querying and initializing logical DMA channel for use by the given protocol. The protocol can be IDMA3_PROTOCOL_NULL in this case no 'env' is allocated

For example, when requesting a logical channel to be used with ACPY3 APIs, the protocol needs to be set to &ACPY3_PROTOCOL.

Bool IDMA3_ChannelRec::persistent

When persistent is set to TRUE, the PaRAMs and TCCs will be allocated exclusively for this channel. They cannot be shared with any other IDMA3 channel.

---

The documentation for this struct was generated from the following file:

• idma3.h