man8/cwrite2

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Name

cwrite2 - write a single command to an AccelNET device driver

Synopsis

cwrite2 <long args> <C> <N> <A> <F> <data>

Description

Write a command to an AccelNET device driver. The command can be any valid read or write command.

Long Arguments

Long argument processing is done using Unix long argument syntax.

The values of all the parameters listed here (whether or not they were supplied on the command line) are printed on stderr when the program starts.

--dev <dev>

The device pathname. If this argument is not supplied the default is "/dev/camac". If present the CWRITE_DEVICE environment variable is used.

--info

Retrieve the driver capability information and exit.

--loop

The command is executed in a loop until the program is exited.

--quiet

The command is executed quietly.

--verbose

Print option values and a sign on message to stderr.

--help

If this is used, the help message is printed to stderr and the program exits.

Normal Arguments

C - required

The CAMAC crate number if writing to a CAMAC driver.
The board number for many other drivers.
N - required

The CAMAC slot number within the crate (if writing to a CAMAC driver). The N value for most other drivers.

A - required

The CAMAC subaddress (if writing to a CAMAC driver). The A value for most other drivers.

F - required

The function code.

The function code may be specified as a number or a string value. The string values for the function code may be retrieved by using the --info option.

data - optional

The write function codes are commands requiring data. This value is the data used for the command.

Environment Variables

CWRITE_DEVICE may be used to override opening /dev/camac. For example:

export CWRITE_DEVICE=/dev/group3
cwrite2 1 1 0 0

Examples

This example reads from a Kinetic Systems 3471 located in crate 1 slot 4.

cwrite2 1 4 0 0

This example writes an alternating bit pattern to a Kinetic Systems 3074 located in crate 2 slot 5.

cwrite2 2 5 0 16 0x555555

Notes

This program supercedes cwrite(8) . cwrite is still available in order to prevent breakage of existing shell scripts and TCL programs but new software should use cwrite2.

Manual page revision

$Id: cwrite2.8,v 1.1 2008/08/05 15:25:26 kitchen Exp $

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