check out my wiring diagram, i think itll accomplish exactly what you're looking to do.
http://www.raspberrypi.org/phpBB3/viewt ... =35&t=9686
In theory yes. Trouble is we are almost stateless at this point. I sleep before sdram has been enabled, and this is just after a reset.
It turns out there is a register (the one written to in the kernel power down function) that does maintain a few bits of state over the reset, so I can distiguish a power on/reboot from a halt.
There's not enough information to set a wakeup alarm duration, or GPIO interrupt pin.
Possibly we could say, a rising ede on GPIOn (for a fixed n) wakes us up again. (Maybe even the HDMI hotplug line, so you could possibly provoke it by powering on your TV).
Although whatever you choose, someone will grumble...
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