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DMAIssueRawTransfer (Windows Embedded CE 6.0)

  • Article

1/6/2010

This function sets up map descriptor registers for a channel to map a DMA transfer from a locked-down buffer. This function fails if there are other DMA transfers queued in the DMA channel.

Syntax

BOOL DMAIssueRawTransfer (
  DMA_TRANSFER_HANDLE *phDmaHandle,
  HANDLE hDmaChannel,
  PVOID lpInPtr,
  DWORD nInLen,
  HANDLE hNotifyHandle,
  PVOID NotifyContext1,
  PVOID NotifyContext2
);

Parameters

  • phDmaHandle
    [in, out] point to a HANDLE that returns DMA_TRANSFER_HANDLE on success
  • hDmaChannel
    [in, out] When DMAIssueRawTransfer returns TRUE, for success, term is a pointer to a DMA_TRANSFER_HANDLE.
  • lpInPtr
    [in] Long pointer to a buffer that contains the data required to perform the operation. This pointer is set to NULL if the dwIoControlCode parameter specifies an operation that does not require input data.
  • nInLen
    [in] Size, in bytes, of the buffer pointed to by lpInBuffer.
  • hNotifyHandle
    [in] Event Handle used when SetEvent is called after the DMA transfer finishes. If this handle is NULL then no call to SetEvent is made when the transfer is finished.
  • NotifyContext1
    [in] Context1 allows a User to attach content to the DMA transfer. The content is retrieved using DMAGetContexts and a valid DMA Handle.
  • NotifyContext2
    [in] Context2 allows a User to attach content to the DMA transfer. The content is retrieved using DMAGetContexts and a valid DMA Handle.

Return Value

Returns TRUE on success. Returns FALSE on failure.

Requirements

Header oaldma.h
Library CEDDK.lib
Windows Embedded CE Windows Embedded CE 6.0 and later

See Also

Reference

CEDDK Dynamic-Link Library DMA Functions
CEDDK Dynamic-Link Library DMA Structures