te
Copyright (c) 1993, Sun Microsystems, Inc.
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
syncinit - set serial line interface operating parameters

/usr/sbin/syncinit device
 [ [baud_rate] | [keyword=value,]... | [single-word option]]

The syncinit utility allows the user to modify some of the hardware operating modes common to synchronous serial lines. This can be useful in troubleshooting a link, or necessary to the operation of a communications package.

If run without options, syncinit reports the options as presently set on the port. If options are specified, the new settings are reported after they have been made.

Options to syncinit normally take the form of a keyword, followed by an equal sign and a value. The exception is that a baud rate may be specified as a decimal integer by itself. Keywords must begin with the value shown in the options table, but may contain additional letters up to the equal sign. For example, loop= and loopback= are equivalent.

The following options are supported:

Keyword Value Effect

loop yes

Set the port to operate in internal loopback mode. The receiver is electrically disconnected from the DCE receive data input and tied to the outgoing transmit data line. Transmit data is available to the DCE. The Digital Phase-Locked Loop (DPLL) may not be used as a clock source in this mode. If no other clocking options have been specified, perform the equivalent of txc=baud and rxc=baud.

no

Disable internal loopback mode. If no other clocking options have been specified, perform the equivalent of txc=txc and rxc=rxc.

echo yes

Set the port to operate in auto-echo mode. The transmit data output is electrically disconnected from the transmitter and tied to the receive data input. Incoming receive data is still visible. Use of this mode in combination with local loopback mode has no value, and should be rejected by the device driver. The auto-echo mode is useful to make a system become the endpoint of a remote loopback test.

no Disable auto-echo mode.

nrzi yes

Set the port to operate with NRZI data encoding.

no

Set the port to operate with NRZ data encoding.

txc txc

Transmit clock source will be the TxC signal (pin 15).

rxc

Transmit clock source will be the RxC signal (pin 17).

baud

Transmit clock source will be the internal baud rate generator.

pll

Transmit clock source will be the output of the DPLL circuit.

rxc rxc

Receive clock source will be the RxC signal (pin 17).

txc

Receive clock source will be the TxC signal (pin 15).

baud

Receive clock source will be the internal baud rate generator.

pll

Receive clock source will be the output of the DPLL circuit.

speed integer

Set the baud rate to integer bits per second.

There are also several single-word options that set one or more parameters at a time:

Keyword Equivalent to Options:

external txc=txc rxc=rxc loop=no

sender txc=baud rxc=rxc loop=no

internal txc=pll rxc=pll loop=no

stop speed=0

Example 1 Using syncinit

The following command sets the first CPU port to loop internally, using internal clocking and operating at 38400 baud:

example# syncinit zsh0 38400 loop=yes
device: /dev/zsh ppa: 0
speed=38400, loopback=yes, echo=no, nrzi=no, txc=baud, rxc=baud

The following command sets the same port's clocking, local loopback and baud rate settings to their default values:

example# syncinit zsh0 stop loop=no
device: /dev/zsh ppa: 0
speed=0, loopback=no, echo=no, nrzi=no, txc=txc, rxc=rxc

Intro (2), ioctl (2), attributes (7), syncloop (8), syncstat (8) device missing minor device number bad speed: arg Bad arg: arg ioctl failure code = errno Do not use syncinit on an active serial link, unless needed to resolve an error condition. Do not use this command casually or without being aware of the consequences.