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tiny fixes to hd44780 docs

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marschap
2007-11-24 21:20:04 +00:00
parent 7854a826b0
commit bd12240266
1 changed files with 29 additions and 24 deletions
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docs/lcdproc-user/drivers/hd44780.docbook
+29 -24
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@@ -20,7 +20,8 @@ one for each half of the display.
<para>
The HD44780 driver supports various ways of connecting HD44780 devices
to your system.
Each of these different ways is called a connection type of the driver.
Each of these different ways is called a <emphasis>connection type</emphasis>
of the driver.
</para>
<para>
@@ -2130,12 +2131,17 @@ But you can set the display's contrast using software
(see the <command>Constrast=</command> configuration parameter).
</para>
<sect4 id="hd44780-bwctusb-config">
<title>Special configuration options</title>
<para>
If there is more than one BWCT USB module connected to the system,
the <command>SerialNumber=</command> configuration parameters allows
selecting which display is used in LCDd.
</para>
</sect4>
</sect3>
@@ -2144,39 +2150,39 @@ selecting which display is used in LCDd.
<para>
<ulink url="http://www.harbaum.org/till/lcd2usb/">LCD2USB</ulink>
is a cheap but powerful do-it-yourself interface to connect HD44780 based displays via USB,
consisting of easily available parts only.
The device supports software adjustable contrast and backlight as well as dual controller displays
(required for 4*27 and 4*40).
is a cheap but powerful do-it-yourself interface to connect HD44780
based displays via USB, consisting of easily available parts only.
The device supports software adjustable contrast and backlight
as well as dual controller displays (required for 4*27 and 4*40).
</para>
<para>
It is based upon Atmel AVR Mega8 CPU with a pure software implementation of the USB protocol
for the Atmel AVR microcontroller series.
It is based upon an Atmel AVR Mega8 CPU with a pure software implementation
of the USB protocol for the Atmel AVR microcontroller series.
</para>
<para>
The whole interface incl. the hardware layout is under a GPL like license.
This means that you can take these schematics and use it as a basis for your own interface
e.g. for a graphic LCD.
This means that you can take these schematics and use it as a basis
for your own interface e.g. for a graphic LCD.
</para>
<para>
Two keys can be connected to the LCD2USB interface board.
They can generate three key events that can be mapped to key names using
the <command>DirectKey_1=</command> to <command>DirectKey_3=</command> commands:
one for each key and the third if the keys are pressed simultaneously.
With this 3-key setup, menus can be used (see example below).
</para>
<sect4 id="hd44780-lcd2usb-config">
<title>Special config options</title>
<para>
Two keys can be connected to the LCD2USB interface board. They can generate three key events
that can be mapped to key names using the <command>DirectKey_1=</command> to
<command>DirectKey_3=</command> commands:
one for each key and one if the keys are pressed simultaneously.
With this 3-key setup, menus can be used (see example below).
</para>
<title>Special configuration options</title>
<para>
Besides the standard configuration options for <code>hd44780</code> displays, the
<code>lcd2usb</code> connection type supports three additional options:
<command>Contrast=</command> to set the display's contrast,
<command>Brightness=</command> to set the display's brightness when is backlight is switched on and
<command>Brightness=</command> to set the display's brightness when the backlight is switched on and
<command>OffBrightness=</command> to set the display's brightness when is backlight is switched off.
Both options expect a number in the range from <literal>0</literal> to <literal>1000</literal>.
</para>
@@ -2205,7 +2211,6 @@ KeyDirect_3=Escape
</screen>
</example>
<tip>
<para>
In order to make the <code>lcd2usb</code> connection type work with a 2-controller display
@@ -2375,7 +2380,7 @@ This can be done by specifying <option>--enable-drivers=all</option> or by inclu
<arg choice="plain"><replaceable>PORT</replaceable></arg>
</term>
<listitem><para>
Specify the address of the parallel port the LCD is connected to.
For parallel connections, specify the address of the parallel port the LCD is connected to.
Common values for <replaceable>PORT</replaceable> are <literal>0x278</literal>,
<literal>0x378</literal> and <literal>0x3BC</literal>.
If not given, the default is <literal>0x378</literal>.
@@ -2388,9 +2393,9 @@ This can be done by specifying <option>--enable-drivers=all</option> or by inclu
<arg choice="plain"><replaceable>DEVICE</replaceable></arg>
</term>
<listitem><para>
If you are using a serial connection, you must
set this parameter to the device your LCD is connected to. For
example, if the display is connected to the first serial port,
If you are using a serial or I<superscript>2</superscript>C connection,
you need to set this parameter to the device your LCD is connected to.
For example, if the display is connected to the first serial port,
you have to set it to <filename>/dev/ttyS0</filename>.
The default value is <filename>/dev/lcd</filename>.
</para></listitem>