<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML ><HEAD ><TITLE >Connection to Keyboard</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="Linux Infrared HOWTO" HREF="index.html"><LINK REL="UP" TITLE="Specific Connections and IrDA - Protocols" HREF="infrared-howto-c-specific-connections.html"><LINK REL="PREVIOUS" TITLE="Connection to Docking Station" HREF="infrared-howto-s-docking-station-connection.html"><LINK REL="NEXT" TITLE="Connection via Serial Cable" HREF="infrared-howto-s-serial-cable-connection.html"></HEAD ><BODY CLASS="sect1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >Linux Infrared HOWTO</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="infrared-howto-s-docking-station-connection.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 3. Specific Connections and IrDA - Protocols</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="infrared-howto-s-serial-cable-connection.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="sect1" ><H1 CLASS="sect1" ><A NAME="infrared-howto-s-keyboard-connection" ></A >3.16. Connection to Keyboard</H1 ><P > The Linux/IrDA keyboard driver is now in user-space. Please see chapter Connection to Docking Station above. </P ><P > Lichen Wang: "The so called IrDA-D standard is designed to transfer Data. It is not suitable for IR Keyboard. IrDA-D is what Dag ported to Linux OS and what MS ported to Windows OS. </P ><P > The so called IrDA-C (Control) is designed for Keyboard, Joy-stick, etc. I am not aware that there is any product in the market that is using it yet. </P ><P > IrDA-D cannot talk to IrDA-C. IrDA-C cannot talk to IrDA-D either. Both the physical encoding/decoding and the software protocol are very different. </P ><P > It is possible to implement both IrDA-D and IrDA-C in the same device. Sharp says that IrDA-D and IrDA-C can coexist -- as long as both of them are not used at the same time in the same IR space. This sounds rather funny to me. According to this definition, anything can co-exist with anything as long as you do not destroy the universe permanently in the process ;-) </P ><P > Seriously, what SHARP says is that they can tailor the IrDA-D so that there are some unused time between the negotiated maximum turnaround time and the actual transmission. They then squeeze the IrDA-C frames in those unused time. The IrDA-D Primary and IrDA-C Master must be implemented in the same device. The keyboards will work, but mice and joysticks may be sluggish at times." </P ><P > For details about using external keyboards with Linux PDAs, see the PDA chapter below. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="infrared-howto-s-docking-station-connection.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="infrared-howto-s-serial-cable-connection.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Connection to Docking Station</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="infrared-howto-c-specific-connections.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Connection via Serial Cable</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
