Nokia N900

開啟工程模式(RD Mode)


What R&D mode does
1. sudo gainroot in the console can be used, without installing anything to gain a root shell.
2. The power button turns on the tablet with a shortpress press as opposed to the longpress normally required.
3. The keyboard backlight behind the left and right side of the keyboard flickers in response to system activity.

You can enable some R&D mode flags (flasher-3.5 --set-rd-flags=) for various features:

Flag Description
no-omap-wd Disables the watchdog on the OMAP processor.
no-retu-wd Disables the watchdog on retu
no-lifeguard-reset Disables the lifeguard process (lifeguard reboots the device when an important system process crashes).
serial-console Enables the serial console (the serial port pins are next to the battery) and causes a shorter battery life.
no-usb-timeout Unknown
sti-console Unknown
no-charging Disables charging via the USB port. bme will still be running in the background.
force-power-key Omap bootreason will be always pwr_key. Maemo system will not see any reboots or watchdog resets. Instead Maemo will think that device was started by power key.

running the command without parameters gives a list of available modes: flasher-3.5 --set-rd-flags

開啟工程模式(RD Mode)

C:\Program Files\maemo\flasher-3.5>flasher-3.5.exe --enable-rd-mode
flasher v2.5.2 (Sep 24 2009)

Suitable USB device not found, waiting.
USB device found found at bus bus-0, device address \\.\libusb0-0001--0x0421-0x0
105.
Found device RX-51, hardware revision 2204
NOLO version 1.4.14
Version of 'sw-release': RX-51_2009SE_21.2011.38-1_PR_MR0
The device is now in R&D mode

設定UART輸出

C:\Program Files\maemo\flasher-3.5>flasher-3.5.exe --set-rd-flags=serial-console
flasher v2.5.2 (Sep 24 2009)

Suitable USB device not found, waiting.
USB device found found at bus bus-0, device address \\.\libusb0-0001--0x0421-0x0
105.
Found device RX-51, hardware revision 2204
NOLO version 1.4.14
Version of 'sw-release': RX-51_2009SE_21.2011.38-1_PR_MR0


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