5.13 _9112_AD_Aquire

uDescription

This function is used to poll the AD conversion data. It will trigger the AD conversion, and read the 12-bit A/D data until the data is ready ('data ready' bit becomes low).

uSyntax

Visual C++ (Windows-95)

int W_9112_AD_Aquire (int card_number, int *ad_data)

Visual Basic (Windows-95)

W_9112_ AD_Aquire (ByVal card_number As Long, ad_data As Long )As Integer

C/C++ ( DOS)

int _9112_AD_Aquire (int card_number, int *ad_data )

uArgument

card_number

:

the card number of PCI-9112

ad_data

:

 

12-bit A/D converted value, the value should be

within 0 to

4095.

Bit

0

~

Bit

3

: is the converted channel number

Bit

4

~

Bit

15 : is the converted A/D data.

uReturn Code :

ERR_NoError, ERR_BoardNoInit

ERR_AD_AquireTimeOut

uExample

#include “9112.h” main()

{

int ad_data;

int errCode;

Int baseAddr, irqNo;

_9112_Initial( CARD_1, &baseAddr, &irqNo);

/* Assume NoError when Initialize PCI-9112 */

/* Set to software trigger at first*/ _9112_AD_Set_Mode(CARD_1, AD_MODE_0 ); /* then trigger the AD */ _9112_AD_Soft_Trig(CARD_1);

/* wait for AD data ready then read it */ errCode = _9112_AD_Aquire(CARD_1, &ad_data);

if( errCode == ERR_NoError )

printf( "The AD value is %d.\n", ad_data ); else

printf( "AD conversion error happen\n" );

}Also See Demo Program 'AD_DEMO1.C'

50 ∙ C/C++ Library