This chapter describes the wienercamac Tcl loadable package. wienercamac allows Tcl scripts to perform CAMAC operations on CAMAC crates that are connected to A VME crate via a Wiener VC32/CC32 board set. This board set is a single crate CAMAC controller solution. In order to provide compatibility with the camac package, each crate is considered to be a CAMAC Branch that has a single crate installed.
The remainder of this chapter describes:
How to incorporate this package in your scripts.
How to use the package itself, with some notes about how to physically set up the VC32 module and how to manage branch and crate addressing.
Reference material is available at wienercamac(3tcl).
Incorporating wienercamac in your scripts is a two step process:
The NSCLDAQ Tcl package repository must be added to the Tcl interpreter's package search path.
The wienercamac package must be loaded into the interpreter via an explicit package require command.
There are two ways to manipulate the Tcl interpreter package load
search path. The environment variable
is a space separated set of additionall directories to search for packages.
The Tcl global variable
auto_path is one of the
several Tcl variables that control the package search path.
From now on we will assume that the environment variable
DAQROOT has been defined to point to the
top level of the NSCLDAQ installation directory tree.
A bash shell script fragment that shows how to append the
NSCLDAQ Tcl package repository to the
environment variable is shown below:
Similarly the code to add the NSCLDAQ Tcl package repository to
auto_path interpreter global is shown
Once the NSCLDAQ Tcl package repository has been added to the repository search path, an explicit package require as shown below must be issued prior to using the package commands:
The commands defined by wienercamac are defined in the ::wienercamac:: namespace. The examples in the next section will use fully qualified command names (e.g. ::wienercamac::cdreg 1 1). It is also possible to import the commands from that namespace using the namespace import command. If you are also using the camac package this is not advisable as both packages share many of the same command names.