Date: Sat, 25 Oct 1997 00:11:34 +0900 From: Jun-ichiro itojun Itoh <itojun@itojun.org> To: William Bulley <web@merit.edu> Cc: mobile@FreeBSD.ORG Subject: Re: new topic! IR support Message-ID: <22060.877705894@coconut.itojun.org> In-Reply-To: web's message of Fri, 24 Oct 1997 10:18:46 -0400. <199710241418.KAA04444@ohm.merit.edu>
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>Does FreeBSD have any support for the IR hardware found on several >(most?) modern laptop units? I will admit publicly to not having >RTFM'd for this answer and I apologize in advance for wasting the >bandwidth if this turns out to be a simple RTFM issue... :-) If you configure BIOS setup and kernel config file properly, you can use IR port port as half-duplex serial port, on most machines (NOTE: baudrate for the IR port must be <= 1Mbps). However, the IR port has very strange behavior if we see it as a serial port: if the both party transmit a character at the same time, the character will be lost due to the shared medium nature. (yes, the air) Using IR port as over-1Mbps device (such as 4Mbps) requires some hack. In that case IR port must be used as HDLC device (varies by chipset, I believe). itojun
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