183 lines
3.8 KiB
HTML
183 lines
3.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>Connection to Keyboard</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Linux Infrared HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Specific Connections and IrDA - Protocols"
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HREF="infrared-howto-c-specific-connections.html"><LINK
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REL="PREVIOUS"
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TITLE="Connection to Docking Station"
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HREF="infrared-howto-s-docking-station-connection.html"><LINK
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REL="NEXT"
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TITLE="Connection via Serial Cable"
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HREF="infrared-howto-s-serial-cable-connection.html"></HEAD
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><BODY
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CLASS="sect1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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><TR
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COLSPAN="3"
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ALIGN="center"
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>Linux Infrared HOWTO</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 3. Specific Connections and IrDA - Protocols</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="sect1"
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><H1
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CLASS="sect1"
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><A
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NAME="infrared-howto-s-keyboard-connection"
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></A
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>3.16. Connection to Keyboard</H1
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><P
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> The Linux/IrDA keyboard driver is now in user-space. Please see
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chapter Connection to Docking Station above.
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</P
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><P
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> Lichen Wang: "The so called IrDA-D standard is designed to transfer
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Data. It is not suitable for IR Keyboard. IrDA-D is what Dag ported to
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Linux OS and what MS ported to Windows OS.
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</P
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><P
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> The so called IrDA-C (Control) is designed for Keyboard, Joy-stick,
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etc. I am not aware that there is any product in the market that is
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using it yet.
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</P
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><P
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> IrDA-D cannot talk to IrDA-C. IrDA-C cannot talk to IrDA-D either.
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Both the physical encoding/decoding and the software protocol are very
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different.
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</P
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><P
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> It is possible to implement both IrDA-D and IrDA-C in the same device.
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Sharp says that IrDA-D and IrDA-C can coexist -- as long as both of
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them are not used at the same time in the same IR space. This sounds
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rather funny to me. According to this definition, anything can
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co-exist with anything as long as you do not destroy the universe
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permanently in the process ;-)
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</P
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><P
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> Seriously, what SHARP says is that they can tailor the IrDA-D so that
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there are some unused time between the negotiated maximum turnaround
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time and the actual transmission. They then squeeze the IrDA-C frames
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in those unused time. The IrDA-D Primary and IrDA-C Master must be
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implemented in the same device. The keyboards will work, but mice and
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joysticks may be sluggish at times."
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</P
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><P
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> For details about using external keyboards with Linux PDAs, see
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the PDA chapter below.
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</P
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></DIV
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><DIV
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><TR
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="infrared-howto-s-docking-station-connection.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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WIDTH="34%"
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VALIGN="top"
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HREF="index.html"
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>Home</A
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HREF="infrared-howto-s-serial-cable-connection.html"
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ACCESSKEY="N"
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>Next</A
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Connection to Docking Station</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="infrared-howto-c-specific-connections.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>Connection via Serial Cable</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |