[Tinyos-help] Atm128 External Interrupt on any change

[Mark Kranz]

I'm trying to generate an interrupt on any logical change on the
atmega 128, (Port E, Pin 6 - INT6). According to the ATmega128
datasheet (pg 90):

ISCn1 ISCn0 Description
0     0     The low level of INTn generates an interrupt request.
0     1     Any logical change on INTn generates an interrupt request
1     0     The falling edge between two samples of INTn generates an
interrupt request.
1     1     The rising edge between two samples of INTn generates an
interrupt request.

Thus, we need something like:
    EICRB |= (1 << ISC60);
    EICRB &= ~(1 << ISC61);

Currently, the GpioInterrupt interface (and the underlying
HplAtm128InterruptPinP implementation) is only capable of handling the
00, 10, and 11 cases. I assume this is because interrupt pins 0..3
only support high-low and low-high transitions - so the interface is
kept general to handle *all* interrupt pins.

Are there any plans to introduce support for multiple transition types
at the GpioInterrupt level? Or shall I just stick with directly
writing to the register (messy)?

cheers

-Mark