[PATCH 0/3] RFC: fix bug http://docs.openmoko.org/trac/ticket/1884

Werner Almesberger werner at openmoko.org
Fri Nov 14 15:32:30 CET 2008

Andy Green wrote:
> It's worth using the scope to confirm that the 1-bit mode was actually
> used at all.
> Another trick that might be interesting then would be now D1 is "clean"
> interrupt signal assuming the 1-bit thing worked, could be toggling a
> GPIO somewhere in the ISR, and looking at that and D1 on the scope.
> Assuming the D1 interrupts are happening at long intervals the
> relationship of any spamming in the ISR to D1 might give a clue.

Yup, that's exactly what I have in mind for my scope :-)

Already the first interrupt should actually give a clue. And the
logic can be reversed as well: trigger on the ISR and see what
happened in its vicinity.

- Werner

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