ADLINK ACL-8112 Series - Manual (Page 87)

C Language Library
• 79
7.20 _8112_AD_Timer
Description
This function is used to setup Timer #1 and Timer #2.
Timer #1 & #2 are used as frequency dividers for generating constant
A/D sampling rate. It is possible to stop the pacer trigger by setting any
one of the dividers to 0. The AD conversion rate is limited by the
conversion time of the AD converter, the highest sampling rate of the
ACL-8112 can not exceed 100KHz, thus the multiplication of the
dividers must be larger than 20.
Syntax
int _8112_AD_Timer( unsigned int c1 , unsigned int
c2 )
int _8112pg_AD_Timer( unsigned int c1 , unsigned int
c2 )
Argument:
c1: frequency divider of timer #1
c2: frequency divider of timer #2,
Note: The A/D sampling rate is equal to: 2MHz / (c1 * c2), if c1 = 0 or c2 =
0, the pacer trigger will be stopped.
Return Code:
ERR_NoError
ERR_BoardNoInit
ERR_InvalidTimerValue
Example:
main()
{
int
ErrCode;
_8112_Initial( CARD_1, A8112B_HG, 0x220 );
/* Assume ERR_NoError when Initialize ACL-8112 */
_8112_AD_Timer( 10 , 10 );
/* set AD sampling rate to 2MHz/(10*10) */
..
_8112_AD_Timer( 0 , 0 );
/* stop the pacer trigger */
}