Difference between revisions of "Unit DMA"

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Revision as of 06:52, 26 September 2016

Return to Unit Reference


Description

To be documented

Constants

To be documented

Type definitions

To be documented

Public variables

To be documented

Function declarations


Initialization functions

[Expand] 
procedure DMAInit;
Description: To be documented


DMA host functions

[Expand] 
function DMAHostStart(DMA:PDMAHost):LongWord;
Description: To be documented


[Expand] 
function DMAHostStop(DMA:PDMAHost):LongWord;
Description: To be documented


[Expand] 
function DMAHostReset(DMA:PDMAHost):LongWord;
Description: To be documented


[Expand] 
function DMAHostProperties(DMA:PDMAHost; Properties:PDMAProperties):LongWord;
Description: To be documented


[Expand] 
function DMAHostCreate:PDMAHost;
Description: Create a new DMA entry


[Expand] 
function DMAHostCreateEx(Size:LongWord):PDMAHost;
Description: Create a new DMA entry


[Expand] 
function DMAHostDestroy(DMA:PDMAHost):LongWord;
Description: Destroy an existing DMA entry


[Expand] 
function DMAHostRegister(DMA:PDMAHost):LongWord;
Description: Register a new DMA in the DMA host table


[Expand] 
function DMAHostDeregister(DMA:PDMAHost):LongWord;
Description: Deregister a DMA from the DMA host table


[Expand] 
function DMAHostFind(DMAId:LongWord):PDMAHost;
Description: To be documented


[Expand] 
function DMAHostEnumerate(Callback:TDMAEnumerate; Data:Pointer):LongWord;
Description: To be documented


[Expand] 
function DMAHostNotification(DMA:PDMAHost; Callback:TDMANotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: To be documented


DMA data functions

[Expand] 
function DMADataCount(Data:PDMAData):LongWord;
Description: Return the total number of data blocks in the linked list


[Expand] 
function DMADataFlags(Data:PDMAData):LongWord;
Description: Return the combined flags of the data blocks in the linked list


[Expand] 
function DMADataMaximum(Data:PDMAData):LongWord;
Description: Return the size of the largest data block in the linked list


DMA buffer functions

[Expand] 
function DMABufferAllocate(DMA:PDMAHost; Size:LongWord):Pointer; inline;
Description: Allocate a data buffer for a DMA request


[Expand] 
function DMABufferAllocateEx(DMA:PDMAHost; var Size:LongWord):Pointer;
Description: Allocate a data buffer for a DMA request


[Expand] 
function DMABufferValidate(DMA:PDMAHost; Buffer:Pointer; Size:LongWord):LongWord;
Description: Validate a data buffer for a DMA request against the DMA host requirements


[Expand] 
function DMABufferRelease(Buffer:Pointer):LongWord;
Description: Release a data buffer from a DMA request


DMA request functions

[Expand] 
function DMARequestAllocate(DMA:PDMAHost; Data:PDMAData; Callback:TDMARequestCompleted; DriverData:Pointer; Direction,Peripheral,Flags:LongWord):PDMARequest;
Description: Allocate a new DMA request


[Expand] 
function DMARequestRelease(Request:PDMARequest):LongWord;
Description: Release and destroy a DMA request


[Expand] 
function DMARequestSubmit(Request:PDMARequest):LongWord;
Description: Submit a DMA request to a DMA host


[Expand] 
function DMARequestCancel(Request:PDMARequest):LongWord;
Description: Cancel a DMA request previously submitted to a DMA host


[Expand] 
procedure DMARequestComplete(Request:PDMARequest);
Description: Called by a DMA host when a DMA request completes


DMA transfer functions

[Expand] 
function DMATransferRequest(DMA:PDMAHost; Data:PDMAData; Direction,Peripheral,Flags,Timeout:LongWord):LongWord;
Description: Perform a DMA transfer request with the supplied data blocks on the supplied host


[Expand] 
function DMATransferRequestEx(DMA:PDMAHost; Data:PDMAData; Callback:TDMARequestCompleted; DriverData:Pointer; Direction,Peripheral,Flags:LongWord):LongWord;
Description: Perform a DMA transfer request with the supplied data blocks on the supplied host


Return to Unit Reference

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