Information/HGAVR

From NAS-Central Buffalo - The Linkstation Wiki

This article Based on work by Frontalot at Linkstationwiki.org
The AVR controls much of the LinkStation hardware, including the power button and LED indicator. It is controlled by the commands sent to /dev/ttyS1. To send commands to the AVR:

echo -n "commands" > /dev/ttyS1

Command	Action/Code
\30\30\30\30	Stops smbd and atalkd if /dev/hda3 is not mounted to /mnt. Sent by /www/script/melsub_diskcheck.sh.
[[[[	Starts slowly blinking power LED (sleep).
]]]]	High-speed cooling fan rotation.
\\\\	Low-speed cooling fan rotation.
>>>>	Unknown. Sent by ppc_uartd on boot.
AAAA	Unknown. Sent by ppc_uartd on boot.
CCCC	Sent by shutdown -r now (reboot).
EEEE	Sent by shutdown -h now (halt).
FFFF	Unknown. Sent by ppc_uartd on boot.
JJJJ	Unknown. Sent by ppc_uartd on boot.
KKKK	Unknown. Sent by ppc_uartd on boot.
QQQQ	Unknown. Sent by ppc_uartd on set timer.
RRRR	End of clear flash memory.
SSSS	Start of clear flash memory and /www/script/melsub_init.sh. Sent by /www/script/melsub_flash.sh.
TTTT	Flash memory update completed (stops blinking power, disk full, and diagnostic LEDs).
UUUU	Flash memory update started (starts blinking power, disk full, and diagnostic LEDs).
VVVV	Turns off disk full LED.
WWWW	Turns on disk full LED.
XXXX	Stops blinking disk full LED.
YYYY	Starts blinking disk full LED.
ZZZZ	Stops slowly blinking power LED. Sent by ppc_uartd.
gggg	Diagnostic LED blinks 3 times and system shutdown (partition error).
iiii	Diagnostic LED blinks 4 times and system shutdown (cooling fan error).
kkkk	Diagnostic LED blinks 5 times and system powers off (flash memory error).
mmmm	Diagnostic LED blinks 6 times and system shutdown (hard drive or ppc_uartd error).
oooo	Diagnostic LED blinks 7 times and system shutdown (RAM, NIC, or HDD controller error).

Most of this information courtesy of http://www.yamasita.jp/linkstation.en/index.html.