Microcontroller

From NAS-Central Buffalo - The Linkstation Wiki

The Kurobox and the Kurobox HG use an Atmel AVR AT90S2313-4SC microcontroller.

Contents 1 Features 2 AVR Commands 3 Sending commands to the AVR 4 See Also

Features

• 2K bytes of Flash Memory
• 128 bytes of EEPROM!
• 128 bytes of Internal Ram
• 15 I/O lines
• one 8 bit timer/counter
• one16-bit timer/counter
• Full Duplex UART
• 10 bit PWM
• Analog Comparator
• on chip oscillator and clock circuitry

AVR Commands

The AVR controls the hardware of the Kurobox, such as the power button and LEDs. It is connected to /dev/ttyS1. To control the hardware, send commands to it.

When you push the power button or initialize button, a corresponding command is send to the AVR by the ppc_uartd daemon.

See here for a description on how to run the kurobox without ppc_uartd

Sending commands to the AVR

To send commands to the AVR,

linkstation # echo -n "commands" > /dev/ttyS1

Listof known commands

Command	Resp	Comments
\30\30\30\30	?	Send by /www/script/melsub_diskcheck.sh
[[[[	OK	POWER LED blinks slowly.
]]]]	OK	A cooling fan begins high-speed rotation.
\\\\	OK	A cooling fan begins low-speed rotation.
>>>>	?	ppc_uartd sends them on boot.
AAAA	?	ppc_uartd sends them on boot.
CCCC	OK	reboot send them before shutdown -r now / reboot.
EEEE	OK	shutdown send them before shutdown -h now.
FFFF	?	ppc_uartd sends them on boot.
JJJJ	?	ppc_uartd sends them on boot.
KKKK	?	ppc_uartd sends them on boot.
QQQQ	?	ppc_uartd sends them on set timer.
RRRR	?	end of clear flash memory.
SSSS	?	start of clear flash memory.
TTTT	OK	finish update flash memory stop blinking POWER, DISK FULL and DIAG LED.
UUUU	OK	Start update flash memory start blinking POWER, DISK FULL and DIAG LED.
VVVV	OK	Turn off DISK FULL LED
WWWW	OK	Turn on DISK FULL LED
XXXX	OK	DISK FULL LED stops blinking
YYYY	OK	DISK FULL LED starts blinking
ZZZZ	OK	POWER LED stops blinking slowly.
gggg	OK	DIAG LED starts 3 times blink(partition error) and shutdown.
iiii	OK	DIAG LED starts 4 times blink(problem in the cooling fan) and shutdown.
kkkk	OK	DIAG LED starts 5 times blink(problem in the flash memory) and cut power(not shutdown).
mmmm	OK	DIAG LED starts 6 times blink(problem in the hard drive) and shutdown.
oooo	OK	DIAG LED starts 7 times blink(problem in RAM/LAN/HDD controller) and shutdown.

Source: AVR commands

See Also

• Atmel AVR AT90S2313-4SC Official Data Sheet