Difference between revisions of "Unit DMA"

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! '''Buffer'''
 
! '''Buffer'''
 
| The buffer to be released
 
| The buffer to be released
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<br />
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'''DMA helper functions'''
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function DMAGetCount:LongWord; inline;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current DMA host count</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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! '''Note'''
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| None documented
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<pre style="border: 0; padding-bottom:0px;">function DMAHostGetDefault:PDMAHost; inline;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current default DMA host</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! '''Note'''
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| None documented
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function DMAHostSetDefault(DMA:PDMAHost):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Set the current default DMA device</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! '''Note'''
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| None documented
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function DMAHostCheck(DMA:PDMAHost):PDMAHost;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check if the supplied DMA is in the DMA host table</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! '''Note'''
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| None documented
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|-
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|}
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">procedure DMALog(Level:Integer; DMA:PDMAHost; const AText:String);</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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! '''Note'''
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| None documented
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<pre style="border: 0; padding-bottom:0px;">procedure DMALogInfo(DMA:PDMAHost; const AText:String);</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! '''Note'''
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| None documented
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">procedure DMALogError(DMA:PDMAHost; const AText:String);</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! '''Note'''
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| None documented
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">procedure DMALogDebug(DMA:PDMAHost;const AText:String);</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! '''Note'''
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| None documented
 
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Revision as of 04:45, 30 November 2016

Return to Unit Reference


Description

To be documented

Constants


[Expand]
DMA specific constants DMA_*


[Expand]
DMA host type constants DMA_TYPE_*


[Expand]
DMA host state constants DMA_STATE_*


[Expand]
DMA host flag constants DMA_FLAG_*


[Expand]
DMA request flag constants DMA_REQUEST_FLAG_*


[Expand]
DMA logging constants DMA_LOG_*


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


[Expand] 
procedure DMATransferRequestComplete(Request:PDMARequest);
Description: Called when a DMA transfer request completes


RTL DMA functions

[Expand] 
function SysDMAAvailable:Boolean;
Description: Check if a DMA host is available


[Expand] 
function SysDMATransfer(Data:PDMAData; Direction,Peripheral:LongWord):LongWord;
Description: Perform a DMA transfer using the list of DMA data blocks provided


[Expand] 
function SysDMAFillMemory(Dest:Pointer; Size:LongWord; Value:Byte):LongWord;
Description: Fill memory at the destination address using DMA


[Expand] 
function SysDMACopyMemory(Source,Dest:Pointer; Size:LongWord):LongWord;
Description: Copy memory from the source to the destination address using DMA


[Expand] 
function SysDMAReadPeripheral(Address,Dest:Pointer; Size,Peripheral:LongWord):LongWord;
Description: Read from a periperal address to the destination address using DMA


[Expand] 
function SysDMAWritePeripheral(Source,Address:Pointer; Size,Peripheral:LongWord):LongWord;
Description: Write to a peripheral address from the source address using DMA


[Expand] 
function SysDMAAllocateBuffer(Size:LongWord):Pointer;
Description: Allocate a buffer compatible with DMA memory reads or writes


[Expand] 
function SysDMAAllocateBufferEx(var Size:LongWord):Pointer;
Description: Allocate a buffer compatible with DMA memory reads or writes


[Expand] 
function SysDMAReleaseBuffer(Buffer:Pointer):LongWord;
Description: Release a buffer allocated with DMAAllocateBuffer


DMA helper functions

[Expand] 
function DMAGetCount:LongWord; inline;
Description: Get the current DMA host count


[Expand] 
function DMAHostGetDefault:PDMAHost; inline;
Description: Get the current default DMA host


[Expand] 
function DMAHostSetDefault(DMA:PDMAHost):LongWord;
Description: Set the current default DMA device


[Expand] 
function DMAHostCheck(DMA:PDMAHost):PDMAHost;
Description: Check if the supplied DMA is in the DMA host table


[Expand] 
procedure DMALog(Level:Integer; DMA:PDMAHost; const AText:String);
Description: To be documented


[Expand] 
procedure DMALogInfo(DMA:PDMAHost; const AText:String);
Description: To be documented


[Expand] 
procedure DMALogError(DMA:PDMAHost; const AText:String);
Description: To be documented


[Expand] 
procedure DMALogDebug(DMA:PDMAHost;const AText:String);
Description: To be documented


Return to Unit Reference

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