Difference between revisions of "IrDA"

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== ThinkPad IrDA configuration ==
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{| width="100%"
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|style="vertical-align:top;padding-right:20px;width:10px;" | [[Image:irda.png|192px]] __NOTOC__
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|style="vertical-align:top" |
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<div style="margin: 0; margin-right:10px; border: 1px solid #dfdfdf; padding: 0em 1em 1em 1em; background-color:#F8F8FF; align:right;">
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===IrDA===
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IrDA is a technology which uses Infrared waves to receive and transmit information. It was convenient for data transfer (back then) as it did not require wires to be used, till it was eventually superseded by Bluetooth. It offered much greater convenience than IrDA as it was capable of transmitting and receiving data in all directions, unlike IrDA that required a direct line-of-sight to work.
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</div>
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|}
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==Overview==
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Some models have an integrated IrDA transceiver that can be used in one of two modes, SIR (IrDA 1.0 and 1.1) or FIR (IrDA 1.1).
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*SIR is limited to serial data rates up to 115.2Kb/s
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*FIR is the preferred mode of IrDA 1.1 and operates at a bandwidth of 4 Mbps
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A newer VFIR standard exists, which supports speeds up to 16 Mbps. However, no models support this.
  
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IrDA can be used to communicate using Infrared to other IrDA compliant devices, such as other Notebooks, PDA's and mobile phones.
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===Linux support===
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See the [[How to make use of IrDA]] page.
  
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All IBM ThinkPads manufactured in the last years have integrated IrDA that can be used in one of two modes, SIR or FIR.
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===External sources===
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Some very old ThinkPads only support SIR mode, or might not have IrDA support at all.
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*[http://irda.sourceforge.net/ Linux-IrDA Project]
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*[http://pcmcia-cs.sourceforge.net/ Linux PCMCIA Project]
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*[http://tpctl.sourceforge.net/ tpctl homepage]
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*[http://www.lirc.org/ Linux Infrared Remote Control]
  
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The purpose of this document is to get the IrDA hardware in your ThinkPad operational, setting up communication to other devices is not covered. However, the external links section can prove useful for this.
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==Models featuring this technology==
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===IrDA 1.0===
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* {{365C}}, {{365CD}}, {{365CS}}, {{365CSD}}, {{365E}}, {{365ED}}, {{365X}}, {{365XD}}
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* {{535}}, {{535E}}, {{560}}
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* {{755CD}}, {{755CDV}}, {{755CE}}, {{755CSE}}, {{755CV}}, {{755CX}}, {{760C}}, {{760CD}}, {{760E}}, {{760ED}}, {{760EL}}, {{760ELD}}, {{760L}}, {{760LD}}, {{760XD}}, {{760XL}}, {{765D}}, {{765L}}
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* {{PC110}}
  
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=== Serial IR (SIR) ===
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===IrDA 1.1===
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SIR is limited to serial datarates up to 115.2Kb/s
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* {{i1124}}, {{i1157}}, {{i1700}}, {{i1720}}, {{i1721}}, {{i1780}}, {{i1781}}
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* {{240}}, {{240X}}, {{240Z}}
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* {{380}}, {{380D}}, {{380E}}, {{380ED}}, {{380XD}}, {{380Z}}, {{385D}}, {{385ED}}, {{385XD}}, {{390}}, {{390E}}, {{390X}}
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* {{535X}}, {{560E}}, {{560X}}, {{560Z}}, {{570}}, {{570E}}
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* {{6 Series}}
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* {{770}}, {{770E}}, {{770ED}}, {{770X}}, {{770Z}}
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* {{A20m}}, {{A20p}}, {{A21e}}, {{A21m}}, {{A21p}}, {{A22e}}, {{A22m}}, {{A22p}}, {{A30}}, {{A30p}}, {{A31}}, {{A31p}}
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* {{T20}}, {{T21}}, {{T22}}, {{T23}}, {{T30}}, {{T40}}, {{T40p}}, {{T41}}, {{T41p}}, {{T42}}, {{T42p}}, {{T43}}, {{T43p}}, {{T60}}, {{T60p}}
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* {{X22}}, {{X23}}, {{X24}}, {{X30}}, {{X31}}, {{X32}}, {{X40}}, {{X41}}, {{X41 Tablet}}, {{X60}}, {{X60s}}, {{X60 Tablet}}
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* {{R30}}, {{R31}}, {{R32}}, {{R40}}, {{R50}}, {{R50p}}, {{R51}}, {{R52}}, {{R60}}
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* {{Z60t}}, {{Z61t}}, {{Z60m}}, {{Z61m}}, {{Z61p}}
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* {{TransNote}}
  
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to-be-done
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[[Category:Glossary]] [[Category:Ports, Connectors and Slots]]
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=== Fast IR (FIR) ===
 
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FIR is the prefered mode and operates at 4Mb/s
 
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Main problem here is that the chips FIR mode needs to be activated. On A, G, R, T and X model ThinkPads the easiest way to achieve this, is by entering the BIOS setup during BOOT by pressing F1 when prompted.
 
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Then select 'Config' followed by 'Infrared'. Here you will need to Enable Infrared. Be sure to save the changes, and then Exit.
 
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Note: Changing these BIOS settings does not effect Windows 2000 or XP, but might cause resource problems under older windows versions, or other legacy Operating Systems.
 
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If changing BIOS settings in not an option, or the settings cannot be altered as on some older ThinkPad, the FIR mode can be activated from the running Linux OS with one of the following:
 
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* setpnp as part of the old pcmcia-utils source package
 
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* tpctl, but only for some old ThinkPads
 
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If the FIR mode is not activated, attempts to load the nsc-ircc module will result in an error in syslog of "Wrong chip version ff".
 
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==== Linux 2.4 kernel config ====
 
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Edit /etc/modules.conf and add the following lines
 
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      alias irda0 nsc-ircc
 
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      options nsc-ircc dongle_id=0x09 io=0x2f8 irq=3
 
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      pre-install nsc-ircc setserial /dev/ttyS1 uart none port 0 irq 0
 
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==== Linux 2.6 kernel config ====
 
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Edit /etc/modprobe.conf and add the following lines
 
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      alias irda0 nsc-ircc
 
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      options nsc-ircc dongle_id=0x09 io=0x2f8 irq=3
 
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      install nsc-ircc /bin/setserial /dev/ttyS1 uart none port 0 irq 0; /sbin/modprobe --ignore-install nsc-ircc
 
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== External links ==
 
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[http://irda.sourceforge.net/ Linux-IrDA Project] (External)
 
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[http://pcmcia-cs.sourceforge.net/ Linux PCMCIA Project] (External)
 
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[http://tpctl.sourceforge.net/ tpctl homepage] (External)
 

Latest revision as of 13:24, 22 November 2020

Irda.png

IrDA

IrDA is a technology which uses Infrared waves to receive and transmit information. It was convenient for data transfer (back then) as it did not require wires to be used, till it was eventually superseded by Bluetooth. It offered much greater convenience than IrDA as it was capable of transmitting and receiving data in all directions, unlike IrDA that required a direct line-of-sight to work.

Overview

Some models have an integrated IrDA transceiver that can be used in one of two modes, SIR (IrDA 1.0 and 1.1) or FIR (IrDA 1.1).

  • SIR is limited to serial data rates up to 115.2Kb/s
  • FIR is the preferred mode of IrDA 1.1 and operates at a bandwidth of 4 Mbps

A newer VFIR standard exists, which supports speeds up to 16 Mbps. However, no models support this.

Linux support

See the How to make use of IrDA page.

External sources

Models featuring this technology

IrDA 1.0

IrDA 1.1

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