Re: gpioflicker

From: Poul-Henning Kamp (none@phk--phk.freebsd.dk.lh.bsd-dk.dk)
Date: Mon 13 Dec 2004 - 13:24:29 CET 

To: bsd-dk@bsd-dk.dk
Subject: Re: gpioflicker 
From: "Poul-Henning Kamp" <none@phk--phk.freebsd.dk.lh.bsd-dk.dk>
Date: Mon, 13 Dec 2004 13:24:29 +0100

In message <none@20041213121848.GA93696--peter.osted.lan.lh.bsd-dk.dk>, Peter Holm writes:
>On Fri, Dec 10, 2004 at 09:55:38PM +0100, Mark Rosenstand wrote:
>> Jeg kom lige forbi http://www.pro-bono-publico.de/openbsd/gpio/
>> og gav det selvfølgelig et forsøg på min net4501. Klart
>> anbefalelsesværdigt!
>>
>> --
>> .-. Mark Rosenstand (-.)
>> oo| cc )
>> /`'\ (+45) 255 31337 3-n-(
>> (\_;/) mark@geekworld.org _(|/`->
>
>På min FreeBSD:
>
>#!/bin/sh
>
># Soekris LED utility.
># Flash the error LED on new messages in /var/log/security
>
>tail -F /var/log/security | while read l; do
> echo "1" > /dev/led/error
> sleep 0.1
> echo "0" > /dev/led/error
>done

Du kan klare det sådan at det ikke giver problemer hvis der
kommer mere end 10 beskeder i sekundet:

        "sAa." > /dev/led/error

Og den helt rå metode er naturligvis:

        echo "m$l" > /dev/led/error

man 4 led :-) 

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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