I try to create bare metal application for TI am335x soc based board. One thing I need to do is to invoke callback1 on rising edge and callback2 on falling edge. From the datasheet I figured out, that simultaneous detection for rising and falling edge could be enabled by writing 1 << pin to RISINGDETECT and FALLINGDETECT GPIO registers. However, I can't understand (see no signs of it in datasheet), how could I determine if the currently appeared interrupt was caused by RISING edge on GPIO or by FALLING edge?
GPIO irq: Falling and Rising edge detection
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Try checking the state of the pin.
A rising edge results in a
onstate, whereas a falling edge results in aoffstate.So the current state of the pin implies the direction of the most-recent interrupt.