                åɥåޡ󥿡ե

                Alan Cox <alan@lxorguk.ukuu.org.uk> 
                  <ayamagat@phys.metro-u.ac.jp> 

                Linux ɥ饤Сȥץ೫ȯδ


ߡʲΥåɥåɥ饤СƤޤ:

        ICS     WDT501-P
        ICS     WDT501-P (ե󡦥᡼ʤ)
        ICS     WDT500-P
        եȥΤ

4 ƤΥ󥿡ե /dev/watchdog ޤΥǥХ
եΥץ󤫤 1 ʬְ˽񤭹ߤʤȷ׻֡Ȥ
ޤ񤭹िӤ˥֡Ȥλ郎 1 ʬֱĹޤեȥ
åɥåξ硤֡ȤΤϷ׻ȳߤξ֤˰¸ޤ
ϡɥܡɤϷ׻򥪥ܡɡޡʪŪ˰Υ
ĤǤ֡Ȥޤ

WDT501P ɤǤϡ٤ƻ뤹 2 Υ󥿡եѤǤ
/dev/temperature ޤϷ׻βڻᲹ٤Ǥɤ߹
िӤ˲٤򼨤 1 ХȤ֤ޤ

 3 Υ󥿡եղŪٹŪ٥Ȥ˴ؤ륫ͥ롦å
Ͽޤ

ɸŪʥͥǤϡեȥȥϡɥξΥåɥå
饤СѤǤޤեȥåɥå򤪻Ȥʤ顤
֡Ȼΰ "panic=60" ɲäƤ褤Ǥ礦

ǽ
----
                        WDT501P         WDT500P        եȥ
֡ȡޡ         X               X                X
֡               X               X                o
                       X               o                o
ե󡦥ԡ           X               o                o
ѥ           X               o                o
ѥС           X               o                o
Сҡ             X               o                o

 WDT ܡɾγ٥ȡ󥿡եϥݡȤƤ
󡥤ʤ餽ΤΥޥʡֹϳƤƤޤ


åɥåɥ饤С
----------------------------

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

int main(int argc, const char *argv[])
{
        int fd=open("/dev/watchdog",O_WRONLY);
        if(fd==-1)
        {
                perror("watchdog");
                exit(1);
        }
        while(1)
        {
                write(fd,"\0",1);
                sleep(10);
        }
}


Ϣ

WDT åɥåޡϡɥˤĤƤΤ礻³Ƥ
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