[Khrushchev]

We have an application that will require:

1. the ability to count contact-closure events on 4 gpio inputs simultaneously, and counting those whose closure duration is within certain limits, say between 25 and 800 ms.

2. The ability to output a digital signal (a clock) via a PWM on a digital output gpio, and read back on an digital input gpio, data synchronous to the output clock. The maximum clock rate would be 2000Hz.

Can anybody suggest how the above might be done without interrupt driven events on the input gpio pins?

[Khrushchev]

What is the timetable for implementation of gpio interrupts? The gpio-notify driver implementation as used in other OpenEmbedded devices would be very helpful for our application, as looping to test status of a gpio input is very processor intensive. – k

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