wake on touchscreen activity?

[Werner Almesberger]

Timo Juhani Lindfors wrote:
> I'd like my freerunner to wake on touchscreen activity. Should I just modify
[...]
> PCF50633_INT3_ADCRDY    = 0x40, /* ADC conversion finished */

The touch screen isn't connected to the PMU, so that won't work.

The touch screen interface in the CPU can generate an interrupt,
but as far as I can tell from the manual, that interrupt can't
wake the CPU from CPU.SLEEP.

What should work is to wire one of the touch screen signals to
a wakeup-capable interrupt (EINT0 through 15), set the internal
pull-down, output a H on the other axis, and trigger on a rising
edge.

- Werner