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marschap
2007-11-11 18:41:53 +00:00
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docs/lcdproc-user/drivers/hd44780.docbook
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<title>The HD44780 Driver</title>
<para>
There are several ways of wiring up the HD44780 devices. Your choice
will probably be governed largely by your ability to wire up each one
and/or a desire to use the device with other programs.
The HD44780 has become the de-facto standard of alphanumeric character displays.
Although the original Hitachi HD44780 is long out of production, its command
set has survived in a variety of (fully or nearly) compatible LCD, VFD and
even OLED displays sold by a broad range of manufacturers all over the world.
To name ony a few: KS0066, KS0070, KS0076, LC7985, NT3881, SED1278, ST7066 ...
</para>
<para>
The LCDproc HD44780 driver supports the following connections on a
parallel port:
The command set of these displays, which sometimes are advertised as being
"industry standards compatible", is thus the workhorse of controllers for
displays ranging from 8x1 to 20x4 or 40x2 characters.
There are even displays with larger dimensions sporting two controllers,
one for each half of the display.
</para>
<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.
</para>
<para>
On a parallel port, probably the first interface type HD44780 devices were
historically connected to, the driver supports the connection types:
</para>
<itemizedlist>
<listitem><para>4bit</para></listitem>
<listitem><para>8bit (winamp style)</para></listitem>
<listitem><para>extended 8bit (LCD + LED bargraph)</para></listitem>
<listitem><para>serial LPT</para></listitem>
<listitem>
<link linkend="hd44780-4bit">4bit</link>:
4bit Wiring
</listitem>
<listitem>
<link linkend="hd44780-8bit-lcdtime">8bit</link>:
8bit Wiring ("lcdtime")
</listitem>
<listitem>
<link linkend="hd44780-8bit-winamp">winamp</link>:
8bit Wiring "winamp" Style
</listitem>
<listitem>
<link linkend="hd44780-seriallpt">serialLpt</link>:
Serial LPT Wiring
</listitem>
</itemizedlist>
<para>
It also supports the following connections:
For serial RS-232 ports you can choose among these connection types:
</para>
<itemizedlist>
<listitem><para>A PIC-an-LCD or LCD serializer connected to a serial port</para></listitem>
<listitem><para>A I<superscript>2</superscript>C port expander connected to an I<superscript>2</superscript>C port</para></listitem>
<listitem><para>USB connection via a FTDI FT2232D chip in bitbang mode</para></listitem>
<listitem>
<link linkend="hd44780-picanlcd">picanlcd</link>:
PIC-an-LCD serial device
</listitem>
<listitem>
<link linkend="hd44780-lcdserializer">lcdserializer</link>:
LCD serializer
</listitem>
<listitem>
<link linkend="hd44780-los-panel">los-panel</link>:
LCD on Serial panel device (<ulink url="http://www.xs4all.nl/~mlf/los/"></ulink>)
</listitem>
<listitem>
<link linkend="hd44780-vdr-lcd">vdr-lcd</link>:
VDR LCD serial device
</listitem>
<listitem>
<link linkend="hd44780-vdr-wakeup">vdr-wakeup</link>:
VDR-Wakeup module
</listitem>
</itemizedlist>
<para>
In recent years, with with parallel ports and serial ports being declared legacy
and on the demise on modern computers, the USB connection types get
more important. Here are the USB connection types the HD44780 driver supports:
</para>
<itemizedlist>
<listitem>
<link linkend="hd44780-pertelian">pertelian</link>:
Pertelian X2040 LCD display (<ulink url="http://pertelian.com/joomla/index.php?option=com_content&amp;task=view&amp;id=43&amp;Itemid=48"></ulink>)
</listitem>
<listitem>
<link linkend="hd44780-bwctusb">bwctusb</link>:
BWCT USB LCD module (<ulink url="http://www.bwct.de/lcd.html"></ulink>)
</listitem>
<listitem>
<link linkend="hd44780-lcd2usb">lcd2usb</link>:
Tim Harbaum's LCD2USB (<ulink url="http://www.harbaum.org/till/lcd2usb/"></ulink>)
</listitem>
<listitem>
<link linkend="hd44780-lis2">lis2</link>:
LIS2 from VLSystem (<ulink url="http://www.vlsys.co.kr"></ulink>)
</listitem>
<listitem>
<link linkend="hd44780-mplay">mplay</link>:
MPlay Blast from VLSystem (<ulink url="http://www.vlsys.co.kr"></ulink>)
</listitem>
<listitem>
<link linkend="hd44780-ftdi">ftdi</link>:
Display connected to a dual channel FTDI 2232D USB chip
</listitem>
</itemizedlist>
<para>
Last but not least, for special purposes, there are even more connection types:
</para>
<itemizedlist>
<listitem>
<link linkend="hd44780-i2c">i2c</link>:
LCD driven by PCF8574(A)/PCA9554(A) connected via I<superscript>2</superscript>C
</listitem>
</itemizedlist>
<para>
The driver also lets you use multiple displays as a single virtual
display. For example, a 4, 2 and 1 line display can be used to form a
@@ -106,7 +208,7 @@ There are several ways to get 5V:
black is GND).
</para></listitem>
<listitem><para>
Get it from the V<subscript>CC</subscript> pin of an USB connector.
Get it from the V<subscript>CC</subscript> and GND pins of an USB connector.
</para></listitem>
<listitem><para>
Get it from a joystick port (pin 1 and 9 are 5V, 4, 5 and 12 are GND).
@@ -467,7 +569,7 @@ The BC327 transistor has the following connections:
<title>4bit</title>
<para>
This is originally based on "lcdtext" (by Matthias Prinke).
This wiring is originally based on "lcdtext" (by Matthias Prinke).
</para>
<table id="hd44780-4bit.base-mapping">
@@ -1999,7 +2101,7 @@ Refer to <link linkend="hd44780-lcdserializer-burning">burning section</link> in
<sect3 id="hd44780-bwctusb">
<title>BWCT USB device "bwctusb"</title>
<title>BWCT USB LCD module "bwctusb"</title>
<para>
The BWCT USB LCD module is also supported. It is not connected to an LPT port
@@ -2307,22 +2409,24 @@ This can be done by specifying <option>--enable-drivers=all</option> or by inclu
</row>
</thead>
<tbody>
<!-- parallel -->
<row>
<entry><literal><link linkend="hd44780-4bit">4bit</link></literal></entry>
<entry>HD44780 4bit Wiring (default)</entry>
<entry>4bit Wiring to parallel port(default)</entry>
</row>
<row>
<entry><literal><link linkend="hd44780-8bit-lcdtime">8bit</link></literal></entry>
<entry>HD44780 8bit Wiring ("lcdtime")</entry>
<entry>8bit Wiring to parallel port ("lcdtime")</entry>
</row>
<row>
<entry><literal><link linkend="hd44780-8bit-winamp">winamp</link></literal></entry>
<entry>HD44780 8bit Wiring "winamp" Style</entry>
<entry>8bit Wiring "winamp" Style to parallel port</entry>
</row>
<row>
<entry><literal><link linkend="hd44780-seriallpt">serialLpt</link></literal></entry>
<entry>HD44780 Serial LPT Wiring</entry>
<entry>Serial LPT Wiring</entry>
</row>
<!-- serial -->
<row>
<entry><literal><link linkend="hd44780-picanlcd">picanlcd</link></literal></entry>
<entry>PIC-an-LCD serial device "picanlcd"</entry>
@@ -2343,6 +2447,7 @@ This can be done by specifying <option>--enable-drivers=all</option> or by inclu
<entry><literal><link linkend="hd44780-vdr-wakeup">vdr-wakeup</link></literal></entry>
<entry>VDR-Wakeup module "vdr-wakeup"</entry>
</row>
<!-- USB -->
<row>
<entry><literal><link linkend="hd44780-pertelian">pertelian</link></literal></entry>
<entry>Pertelian X2040 LCD display (<ulink url="http://pertelian.com/joomla/index.php?option=com_content&amp;task=view&amp;id=43&amp;Itemid=48"></ulink>)</entry>
@@ -2363,14 +2468,15 @@ This can be done by specifying <option>--enable-drivers=all</option> or by inclu
<entry><literal><link linkend="hd44780-mplay">mplay</link></literal></entry>
<entry>MPlay Blast from VLSystem (<ulink url="http://www.vlsys.co.kr"></ulink>)</entry>
</row>
<row>
<entry><literal><link linkend="hd44780-i2c">i2c</link></literal></entry>
<entry>LCD driven by PCF8574(A)/PCA9554(A) connected via I<superscript>2</superscript>C</entry>
</row>
<row>
<entry><literal><link linkend="hd44780-ftdi">ftdi</link></literal></entry>
<entry>Display connected to a dual channel FTDI 2232D USB chip</entry>
</row>
<!-- I2C -->
<row>
<entry><literal><link linkend="hd44780-i2c">i2c</link></literal></entry>
<entry>LCD driven by PCF8574(A)/PCA9554(A) connected via I<superscript>2</superscript>C</entry>
</row>
</tbody>
</tgroup>
</informaltable>