User`s guide

56 • C/C++ Libraries
@ Syntax
Visual C/C++ (Windows 95)
int W_7300_AUX_DO_Channel (int card_number, int do_ch_no, int
do_data)
Visual Basic (Windows 95)
W_7300_AUX_DO_Channel (ByVal card_number As Long, ByVal do_ch_no
As Long, ByVal do_data As Long) As Long
C/C++ (DOS)
int _7300_AUX_DO_Channel (int card_number, int do_ch_no, int
do_data)
@ Argument
card_number: The card number of the PCI-7300A card.
do_ch_no: the DO channel number, the value has to be set
within 0 and 3.
do_data: either 0 (OFF) or 1 (ON).
@ Return Code
NoError
PCICardNumErr
PCICardNotInit
InvalidDIOChNum
InvalidDOData
5.12 _7300_Alloc_DMA_Mem
@ Description
Contact Windows 95 system to allocate a memory for DMA transfer. 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.