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In order to allow applications to use the power button, the keypad handler
will wait half a second if the key is pressed and hold, until the power
is turned off. This way the application does not need to handle it.
The power off function will then wait until the button is released, so the
phone will not start again while the button is still pressed.
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Since the powerbutton on the Pirelli DP-L10 doesn't seem to be
connected to the keypad scan matrix at all, we're using Iota's
PWON interrupt to determine if the powerbutton has been pressed,
and power off the phone after it has been released again.
This also affects the Compal phones, since the interrupt happens
quite some time before the keypad driver notices the keypress.
The code in the keypad driver that has been used so far to power
off the phone will remain as a backup when running without
interrupts at all (e.g. the loader application).
Signed-off-by: Steve Markgraf <steve@steve-m.de>
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This means we can even send and receive in the same TDMA frame,
provided we keep the usual 3 timeslot distance between DL and UL.
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If we perform the downlink calibration too early, the TRF6151 might
not yet provide a stable signal and we'll not be able to receive
anything.
From the desired "BDLENA" time, we subtract all the delays and
latencies to determine the point in time at which the calibration
process should start.
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