Direct Memory Access Abstraction PDD Functions (Windows Embedded CE 6.0)
1/6/2010
The following table shows the Direct Memory Access (DMA) abstraction platform dependent driver (PDD) functions.
| Programming element | Description |
|---|---|
This function allows the PDD to update the CE_DMA_ADAPTER structure. |
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This function is used by the PDD to create a DMA_PDD_CHANNEL_CONTEXT structure. |
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This function frees a DMA_PDD_CHANNEL_CONTEXT structure created by LPAllocateChannel. |
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This function is a callback function used when the system is suspended and when it resumes. |
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This function allocates a DMA adapter specific driver. A similar function is HalAllocateCommonBuffer. |
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This function frees a DMA adapter specific driver. A similar function is HalFreeCommonBuffer. |
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This PDD function is called during power on reset. |
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This function determines if the DMA channel requested by the user is suitable. |
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This function updates the transfer flags required by the user and masks any flags the PDD does not support. |
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This function checks whether the physical address specified for the DMA transfer is usable. |
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This function is used by the model device driver (MDD) to determine whether a DMA transfer can be armed. |
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This function arms a DMA transfer. |
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This function terminates a DMA transfer that was armed by the PDD. |
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This function starts an armed DMA transfer, if the DMA transfer is not marked as auto start. |
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This function polls to determine if a DMA transfer is complete. |
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This function polls to determine the current status of a DMA transfer. |
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This function creates a DMA_PDD_TRANFER_CONTEXT structure. This entry is optional. If it exists, it is called when DMAIssueTransfer is called by the user. |
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This function creates a vendor specific DMA transfer. This entry is only required when the PDD supports vendor specific DMA transfers. |
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This function frees the DMA_PDD_TRANFER_CONTEXT structure created by LPCreateDmaPDDTransfer. This entry is optional. |
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This function is called when the user issues a call to DMARawTransferControl. |