The Low Level CAMAC Interface

The functions which are described in this section perform raw CAMAC I/O. They are intended to be used for debugging purposes or for testing new hardware.

Table 8.1: Raw CAMAC Functions

name	Explanation	Example
cmcrd	Read	$ret = cmcrd( $n, $f, $a);
cmcrdbcd	Read binary coded decimals	$ret = cmcrdbcd( $n, $f, $a);
cmcrdbcdc	Read complementary binary coded decimals	$ret = cmcrdbcdc( $n, $f, $a);
cmcwd	Write	$ret = cmcwd( $n, $f, $a, $data);
cmcci	Clear inhibit	$ret = cmcci();
cmcsi	Set inhibit	$ret = cmcsi();
cmcdc	Data way clear	$ret = cmcdc();
cmcdz	Data way zero	$ret = cmcdz();
cmcsc	Select crate	$ret = cmcsc( $crate);

The following example code demonstrates how data is read/written from/to an input/output register.

#!/bin/perl

use Spectra; 

$n = 9; 
$f = 0; 
$a = 0; 
$status = cmcrd( $n, $f, $a);
print " cmcrd: Got $status \n"; 

$n = 8; 
$f = 16; 
$a = 0; 
$date = 15; 
$status = cmcwd( $n, $f, $a, $data);
print " cmcwd status: $status \n";