9113_Ad_Ffhf_Polling - NuDAQ PCI- 9113A User Manual

@ Argument
cardNo: the card number of PCI-9113A card initialized.
ch1: the IRQ status of INT1
ch2: the IRQ status of INT2
@ Return Code
None

6.29 _9113_AD_FFHF_Polling

@ Description
This function is used to perform the powerful AD data transfer by
applying half-full polling mode. This method checks the FIFO half full
signal every time calling this function. If the FIFO is not half-full, the
software does not read data. When the FIFO is full, the AD FIFO is
overrun. When the FIFO is half-full but not full, software reads the A/D
data, which is stored in FIFO, in size of one "block" (512 words). The
FIFO half-full polling method is the most powerful A/D data transfer
mode. Please refer to section 5.1.4 for the detailed description of
half-full polling mode.
@ Syntax
C/C++ (DOS)
U16 _9113_AD_FFHF_Polling (U16 cardNo, U16 far *ad_buf)
C/C++ (Windows 95)
U16 W_9113_AD_FFHF_Polling (U16 cardNo, U16 *ad_buf)
Visual Basic (Windows 95)
W_9113_AD_FFHF_Polling (ByVal cardNo As Integer, ad_buf As Integer)
As Integer
@ Argument
cardNo: The card number of PCI-9113A card initialized.
ad_buf:
can not be smaller than 512 words. The data format can be
referred to section 5.1.5 for the details.
@ Return Code
The buffer stores the A/D converted value. The size of ad_buf
C/C++ Software Library 59