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Add a mini example about using cu(1) to connect to a serial port.

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Requested by:	   Soeren Straarup <xride@x12.dk>
Assisted by:	   Daniel Gerzo <danger@rulez.sk>
This commit is contained in:
Giorgos Keramidas 2006-08-12 15:27:06 +00:00
parent 73ca3a5496
commit 35bea87f0c
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=28448
1 changed files with 36 additions and 0 deletions
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36
en_US.ISO8859-1/books/handbook/serialcomms/chapter.sgml
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@ -746,6 +746,42 @@ sio3: type 16550A</screen>
spouse is busy working on your FreeBSD system's console, you can do
some text-only work at the same time from a less powerful personal
computer hooked up as a terminal to the FreeBSD system.</para>
<para>There are at least two utilities in the base-system of
&os; that can be used to work through a serial connection:
&man.cu.1; and &man.tip.1;.</para>
<para>To connect from a client system that runs &os; to the
serial connection of another system, you can use:</para>
<screen>&prompt.root; <userinput>cu -l <replaceable>serial-port-device</replaceable></userinput></screen>
<para>Where <quote>serial-port-device</quote> is the name a
special device file denoting a serial port of your system.
These device files are called
<devicename>/dev/cuaa<replaceable>N</replaceable></devicename>
for &os; versions older than 6.0, and
<devicename>/dev/cuad<replaceable>N</replaceable></devicename>
for 6.0 and later versions.</para>
<para>The <quote>N</quote>-part of a device name is the serial
port number.</para>
<note>
<para>Note that device numbers in &os; start from zero and not
one (like they do, for instance in DOS-derived systems).
This means that what DOS-based systems
call <quote>COM1</quote> is
usually <filename>/dev/cuad0</filename> in &os;.</para>
</note>
<note>
<para>Some people prefer to use other programs, available
through the Ports Collection. The Ports include quite a few
utilities which can work in ways similar to &man.cu.1; and
&man.tip.1;,
i.e. <filename role="package">comms/minicom</filename>.</para>
</note>
</sect3>
<sect3 id="term-x">