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<sect1 id="serialPOS-howto">
<title>The serialPOS Driver</title>
<para>
This section talks about using LCDproc with a point of sale ("POS") character-display.
</para>
<para>
The <code>serialPOS</code> driver is currently working with the AEDEX emulation protocol,
and may support Epson ESC/POS and Logic Controls. It can be extended to work with various
other protocol displays.
</para>
<para>
The driver should operate most character POS displays with a serial (RS-232) input.
Because these displays use a standardized protocol, if the protocol is
supported by your display, it should work as expected.
Feedback is welcome.
<table id="serialPOS-howto.status">
<title>serialPOS: Emulation Protocol Status</title>
<tgroup cols="4">
<thead>
<row>
<entry>Protocol</entry>
<entry>Display tested</entry>
<entry>Currently Supported</entry>
<entry>Remark</entry>
</row>
</thead>
<tbody>
<row>
<entry>AEDEX</entry>
<entry>Emax</entry>
<entry>Yes</entry>
<entry> </entry>
</row>
<row>
<entry>IEE</entry>
<entry> </entry>
<entry>No</entry>
<entry> </entry>
</row>
<row>
<entry>Epson</entry>
<entry>No</entry>
<entry>Yes</entry>
<entry> </entry>
</row>
<row>
<entry>Emax</entry>
<entry> </entry>
<entry>No</entry>
<entry> </entry>
</row>
<row>
<entry>IBM</entry>
<entry> </entry>
<entry>No</entry>
<entry> </entry>
</row>
<row>
<entry>Logic Controls</entry>
<entry>No</entry>
<entry>Yes</entry>
<entry> </entry>
</row>
<row>
<entry>Ultimate</entry>
<entry> </entry>
<entry>No</entry>
<entry> </entry>
</row>
</tbody>
</tgroup>
</table>
<literal>(</literal>…<literal>)</literal>: Feature not tested.
</para>
<sect2 id="serialPOS-connections">
<title>Connecting The Display</title>
<para>
Connecting the display should consist of simply plugging it into your computer's
RS-232 serial port. Because these displays typically support full RS-232, no additional
wiring is needed. If your computer does not have such a port (many newer computers don't),
you can use a USB to serial adapter with a driver provided by the adapter manufacturer.
</para>
<para>
If your display supports a <emphasis>pass-through</emphasis> function, you can connect
an RS-232 keyboard or terminal to the pass-through port. This will allow you to input
keystrokes to LCDproc and control features and menus. Use the pass-through keyboard's
arrow, delete, and return keys by default.
</para>
<note>
<para>
If your display supports a <emphasis>pass-through</emphasis> function,
but you do not have another RS-232 device connected to the pass-through port,
you may experience hangs if an improperly formatted command sneaks through.
This is because the display is waiting for the pass-through device to accept
the data and a blocking state is created within the display.
You can either connect another RS-232 device or use a wire to jumper the CTS and RTS
pins together within the display.
</para>
</note>
</sect2>
<!-- ## Serial POS driver ## -->
<sect2 id="serialPOS-config">
<title>Configuration in LCDd.conf</title>
<sect3 id="serialPOS-config-section">
<title>[serialPOS]</title>
<variablelist>
<varlistentry>
<term>
<property>Device</property> =
<parameter><replaceable>DEVICE</replaceable></parameter>
</term>
<listitem><para>
Device to use in serial mode. Usual values are <filename>/dev/ttyS0</filename> or
<filename>/dev/cu.usbserial</filename>. Default is <filename>/dev/lcd</filename>.
</para></listitem>
</varlistentry>
<varlistentry>
<term>
<property>Size</property> = ¶meters.size;
</term>
<listitem><para>
Specifies the size of the VFD in characters.
If not given, it defaults to <literal>16x2</literal>.
</para></listitem>
</varlistentry>
<varlistentry>
<term>
<property>Type</property> =
{
<parameter><literal>IEE</literal></parameter> |
<emphasis><parameter><literal>AEDEX</literal></parameter></emphasis> |
<parameter><literal>Epson</literal></parameter> |
<parameter><literal>Emax</literal></parameter> |
<parameter><literal>IBM</literal></parameter> |
<parameter><literal>LogicControls</literal></parameter> |
<parameter><literal>Ultimate</literal></parameter>
}
</term>
<listitem><para>
Set the communication protocol to use with the POS display.
If not specified it defaults to <literal>AEDEX</literal>.
Currently, only AEDEX is supported.
</para></listitem>
</varlistentry>
<varlistentry>
<term>
<property>Speed</property> =
{
<parameter><literal>1200</literal></parameter> |
<parameter><literal>2400</literal></parameter> |
<emphasis><parameter><literal>9600</literal></parameter></emphasis> |
<parameter><literal>19200</literal></parameter> |
<parameter><literal>115200</literal></parameter>
}
</term>
<listitem><para>
Set the the baud rate communication with the POS display.
If not given the default of <literal>9600</literal> is used.
</para></listitem>
</varlistentry>
</variablelist>
</sect3>
</sect2>
</sect1>
|
