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extended documentation for hd44780 connection type ethlcd (Mariusz Bialonczyk)

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marschap
2008-10-15 09:17:20 +00:00
parent 5d61775108
commit 728d97f0b1
1 changed files with 65 additions and 14 deletions
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docs/lcdproc-user/drivers/hd44780.docbook
+65 -14
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@@ -162,6 +162,7 @@ HD44780 driver.
</para>
-->
<sect2 id="hd44780-connections">
<title>Connections</title>
@@ -1859,20 +1860,6 @@ please look at the driver source if you really need that.
</sect3>
<sect3 id="hd44780-ethlcd">
<title>ethlcd device</title>
<para>
ethlcd (<ulink url="http://manio.skyboo.net/ethlcd"></ulink>)
is a PoE powered device controlled via TCP. It has a 3-state (ON, HALF, OFF) backlight
control, 6 buttons and a beeper. The hardware and software are open source.
To use it, specify the device IP address or hostname, on which the ethlcd device is
accessible by setting in config file the <command>Device</command> value.
The default is <filename>ethlcd</filename>.
</para>
</sect3>
<sect3 id="hd44780-lis2">
<title>LIS2 USB device "lis2"</title>
@@ -2434,8 +2421,69 @@ off the address.
</sect3>
<sect3 id="hd44780-ethlcd">
<title>ethlcd device</title>
<para>
ethlcd (<ulink url="http://manio.skyboo.net/ethlcd"></ulink>) device is simply
an LCD display driven by an ATmega microcontroller, controlled and powered by
"home-made" Power over Ethernet. The hardware and software are open source.
<title>Features</title>
<itemizedlist>
<listitem><para>ethernet connection using ENC28J60 ethernet controller</para></listitem>
<listitem><para>Power over Ethernet (data and power using single UTP cable)</para></listitem>
<listitem><para>Atmel's ATmega168 microcontroller</para></listitem>
<listitem><para>6 buttons (MENU, UP, DOWN, LEFT, RIGHT, ENTER)</para></listitem>
<listitem><para>backlight control in three states: ON, Night-Mode (partialy ON) and OFF</para></listitem>
<listitem><para>beeper</para></listitem>
<listitem><para>device act as a TCP server - LCDproc driver is connecting to device just by creating
a TCP socket - no need to PC-side additional hardware besides NIC</para></listitem>
</itemizedlist>
</para>
<figure id="hd44780-connections-ethlcd.block-diagram">
<title>HD44780: ethlcd - block diagram</title>
<screen>
<![CDATA[
_____________________________________________________
| buttons |
| ^ |
| | |
| _________ ___________ ____________ |
| | | | | | | |
| | | | | | | |
| | LCD | | | SPI | ENC28J60 | | UTP cable
| | HD44780 |<--- | ATmega168 | <---> | ethernet |<========+------> PC running
| | | | | | controller | | | LCDproc
| | | | | | | | |
| |_________| |___________| |____________| | |
| | | |
| | | |
| beeper | |
|_____________________________________________________| |
ethlcd AC Adapter
]]>
</screen>
</figure>
<para>
The device is "visible" to LCDproc just like any other HD44780 device. The difference
is the wiring - instead of connecting the display directly to PC (via serial/parallel/usb port),
it is connected via ethernet and the communication is done over TCP connection.
The main feature is - that to power and control the LCD is needed single UTP cable.
To use the driver, specify the device IP address or hostname, on which the ethlcd device
is accessible by setting in config file the <command>Device</command> value.
The default is <filename>ethlcd</filename>.
</para>
</sect3>
</sect2>
<sect2 id="hd44780-compiling">
<title>Compiling</title>
@@ -2448,6 +2496,7 @@ This can be done by specifying <option>--enable-drivers=all</option> or by inclu
</sect2>
<!-- ## Hitachi HD44780 driver ## -->
<sect2 id="hd44780-config">
<title>Configuration in LCDd.conf</title>
@@ -2954,6 +3003,7 @@ This can be done by specifying <option>--enable-drivers=all</option> or by inclu
</sect2>
<!--
<sect2 id="hd44780-running">
<title>Running</title>
@@ -2983,6 +3033,7 @@ file anyway.
</sect2>
-->
<sect2 id="hd44780-miscellania">
<title>Miscellania</title>