ADLINK PCI-7200 - Manual (Page 82)

70 C/C++ Libraries
5.24 _7200_DO_DMA_Start
@ Description
The function will perform digital output N times with DMA data
transfer by using the following four sampling modes:
1. Pacer trigger (internal timer trigger, TIME 1)
2. Internal timer pacer with O_REQ enabled
3. O_REQ & O_ACK handshaking
It takes place in the background which will not be stopped until the
Nth conversion has been completed or the program executes the
_7200_DO_DMA_Stop function to stop the process. After execut-
ing this function, it is necessary to check the status of the opera-
tion by using the function _7200_DO_DMA_Status.
@ Syntax
Visual C++ (Windows 95)
int W_7200_DO_DMA_Start (U8 mode, U32 count, U32
handle, Boolean repeat)
Visual Basic (Windows 95)
W_7200_DO_DMA_Start (ByVal mode As Byte, ByVal
count As Long, ByVal handle As Long, ByVal
repeat as Byte) As Long
C/C++ (DOS)
int _7200_DO_DMA_Start (U8 mode, U32 count, U32
*do_buffer, Boolean repeat)
@ Argument
mode: Digital output trigger modes
DO_MODE_0: Internal timer pacer (TIME 1)
DO_MODE_1: Internal timer pacer with O_REQ enable
DO_MODE_2: O_REQ & I_REQ handshaking
count:the sample number of digital output data (in samples, not in
bytes)
handle (Win 95): the handle of system DMA memory. In Windows
95, before calling W_7200_DO_DMA_Start,