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Bearbeitungen
LittlePrinter: Unterschied zwischen den Versionen
add pictures and chip names
HKay (Diskussion | Beiträge) (Explain how to gain access to the bridge via SSH) |
HKay (Diskussion | Beiträge) (add pictures and chip names) |
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=== Hardware ===
[[Datei:Little_printer_bridge_v1.4_top.jpeg|200px|thumb|right|top of bridge v1.4 PCB]]
[[Datei:Little_printer_bridge_v1.4_bot.jpeg|200px|thumb|left|top of bridge v1.4 PCB]]
Right from the start the board offers several unpopulated pinheaders for JTAG and SERIAL. A quick check with the Oscilloscope reveals the pinout. And a logic analyser tells us the required baud settings. Baudrate: 115200 8N1 of course no hardware flow control. The voltage levels are 3.3 volts.
The board contains the following ICs
RAM: 48LC16M16A2 - 256 Mbit
FLASH: 29F2G08ABAEA - 2Gb 16bit blocks
CPU: ATMEL AT91SAM9620
Ethernet tranceiver: KSZ8041NL
ZigBee Module: ETRX357
The rest is voltage regulation and logic
Here is the boot chatter of the bridge.
The system is a AT91SAM9G20 at a clockspeed of 396 MHz running Linux with a kernel version of 2.6.36.4 in April of 2013
It has access to 32
The boot process finishes in a login prompt.
The obvious passwords default passwords don't work.
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