User`s guide

64 • C/C++ Libraries
PCICardNumErr
PCICardNotInit
5.21 _7300_DO_PG_Start
@ Description
The function will perform pattern generation with the data stored in buff_ptr. It
will takes place in the background which will not be stop until your program
execute
_7300_DO_PG_Stop
function to stop the process.
@ Syntax
Visual C/C++ (Windows 95)
int W_7300_DO_PG_Start (int card_number, void *buff_ptr, U32
count)
Visual Basic (Windows 95)
W_7300_DO_PG_Start (ByVal card_number As Long, buff_ptr As Any,
ByVal count As Long) As Long
C/C++ (DOS)
int _7300_DO_PG_Start (int card_number, void *buff_ptr, U32
count)
@ Argument
card_number: The card number of the PCI-7300A card.
buff_ptr: the start address of the memory buffer to store
the output data of pattern generation.
** This memory should be double-word alignment
count: the total number of pattern generation samples.
The size of the sample depends on the port
configuration. For example, if port is set as DO32,
each sample contains 4 bytes; if port is set as
DI16DO8 or DI8DO8, each sample is 1 byte.
@ Return Code
NoError
PCICardNumErr
PCICardNotInit
DMATransferNotAllowed
InvalidDIOCount
BufNotDWordAlign
DMADscrBadAlign