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C/C++ Library

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5.10 _8216_AD_Set_Range

@ Description

This function is used to set the A/D range by means of writing data to

the A/D range control register. There are two factors will change the

analog input range- Gain and Input type. The Gain can be choice from

1,2,4 and 8. The initial value of gain is '1' which is set by the ACL-8216

hardware. The relationship between analog input range and gain is

specified by following tables:

Input

Range (V)

Gain Range

Code

±5 V

X 1 0

±2.5 V

X 2 1

±1.25 V

X 4 2

±0.625 V

X 8 3

@ Syntax

int _8216_AD_Set_Range( int range_code )

@ Argument

range_code:

the programmable range of A/D

conversion, the possible values.

@ Return Code

ERR_NoError

ERR_BoardNoInit

ERR_AD_InvalidGain

@ Example

#include "8216.h"

main()

{

_8216_Initial( CARD_1, 0x220 );

/* Assume NoError when Initialize ACL-8216 */

_8216_AD_Set_Range( 1 );

printf( "The A/D analog input range is +/-5V.\n" );

…

}

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