GIO Interrupt on both edges

Hi Christian,

The GIOINTDETx field of the INTDET register (offset 0x8) in the GIO module allows you to configure both a rising edge, and a falling edge, as interrupt conditions. This interrupt still needs to be enabled via the GIOENASET register.

Note that there is no debouncing built into the GIO input circuit, so any glitch filtering must be done externally in hardware, or in software.

Regards, Sunil

Hi there,

What register should I look into after the generation of the interrupt, to distinguish whether a rising or falling edge has triggered the interrupt?

Thanks!

Chuck,

If you have enabled interrupt generation on both edges, then you can read the pin level in the ISR to identify which edge caused the interrupt. This will work as long as the edges do not occur at a rate faster than the ISR handler execution.

Regards, Sunil

Since there is no register for this purpose, this workaround surely works.

Thank you!