CopyFrom method copies sample data from the DMA channel's common buffer to the specified destination buffer.
- Destination [in, out]
Pointer to the destination buffer
- Source [in]
Pointer to the source buffer, which is located in the DMA channel's common buffer.
- ByteCount [in]
Specifies the number of bytes to be copied.
The Source and Destination pointers are both kernel-mode virtual addresses. The IDmaChannel::SystemAddress call returns the virtual address of a DMA channel's common buffer.
The Source parameter points to the beginning of the source buffer, which occupies ByteCount contiguous bytes in the DMA channel's common buffer.