ADLINK PCI-7300A - Manual (Page 83)

C/C++ Libraries 71
5.12 _7300_Alloc_DMA_Mem
@ Description
Contact Windows 95 system to allocate a memory for DMA trans-
fer. This function is only available in Windows 95 version.
@ Syntax
Visual C/C++ (Windows 95)
int W_7300_Alloc_DMA_Mem (U32 buf_size, HANDLE
*memID, U32 *linearAddr)
Visual Basic (Windows 95)
W_7300_Alloc_DMA_Mem (ByVal buf_size As Long,
memID As Long, linearAddr As Long) As Long
@ Argument
buf_size:Bytes to allocate. Please be careful, the unit of this
argument is BYTE, not SAMPLE.
memID:If the memory allocation is successful, driver returns the ID
of that memory in this argument. Use this memory ID in
W_7300_DI_DMA_Start or W_7300_DO_DMA_Start function call.
linearAddr:The linear address of the allocated DMA memory.
You can use this linear address as a pointer in C/C++ to access
(read/write) the DMA data.
@ Return Code
NoError
AllocDMAMemFailed