Debian udev

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Revision as of 07:24, 22 June 2006

Why is there a problem while installing udev ?

Installing udev on the kurobox debian will lead to a problem with AVR device initialisation (and if you do not initialise the AVR device, the kurobox will shut down few minutes after power up) !

The problem is that the AVR device can be accessed using /dev/AVR00, but udev will not create this device ! You have to use /dev/ttyS1 instead ! The problem is that when you're not running udev, /dev/ttyS1 does not point to the AVR device !

How to solve the problem

To solve this, you have to update the following files :

• /etc/init.d/halt :

replace

echo -n "EEEE" > /dev/AVR00

with

if [ -e /dev/AVR00 ]; then
  echo -n "EEEE" > /dev/AVR00
else
  echo -n "EEEE" > /dev/ttyS1
fi

• /etc/init.d/reboot :

replace

echo -n "EEEE" > /dev/AVR00

with

if [ -e /dev/AVR00 ]; then
  echo -n "EEEE" > /dev/AVR00
else
  echo -n "EEEE" > /dev/ttyS1
fi

• /etc/init.d/kuro_boot :

replace

  echo -n "AVR00 port init : "
  stty -F /dev/AVR00 10:1:9f0d:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0
  echo -n "AVR init string send"
  echo -n "AAAAFFFFJJJJ>>>>VVVV>>>>ZZZZVVVVKKKK" > /dev/AVR00

with

if [ -e /dev/AVR00 ]; then
  echo -n "AVR00 port init : "
  stty -F /dev/AVR00 10:1:9f0d:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0
  echo -n "AVR init string send"
  echo -n "AAAAFFFFJJJJ>>>>VVVV>>>>ZZZZVVVVKKKK" > /dev/AVR00
else
  echo -n "ttyS1 port init : "
  stty -F /dev/ttyS1 10:1:9f0d:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0
  echo -n "AVR init string send"
  echo -n "AAAAFFFFJJJJ>>>>VVVV>>>>ZZZZVVVVKKKK" > /dev/ttyS1
fi

• /etc/init.d/kuroevtd (If you're not willing to install avr_evtd instead of kuroevtd)

replace both entries (in start & restart) of

start-stop-daemon --start --quiet --exec /usr/sbin/kuroevtd /dev/AVR00

with

if [ -e /dev/AVR00 ]; then
  start-stop-daemon --start --quiet --exec /usr/sbin/kuroevtd /dev/AVR00
else
  start-stop-daemon --start --quiet --exec /usr/sbin/kuroevtd /dev/ttyS1
fi

Conclusion

Now you can make a

apt-get install udev

and the kurobox will no more shutdown few minutes after startup !

--Sylver 10:03, 14 June 2006 (CDT)