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?
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Alex Hoppus
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1Check the state of the pin? E.G. a rising edge results in a state of `on`. – sawdust Oct 18 '17 at 23:31
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Bingo, the question is really dumb. You can post it as an answer if you would like to. Thank you. – Alex Hoppus Oct 19 '17 at 08:40
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how could I determine if the currently appeared interrupt was caused by RISING edge on GPIO or by FALLING edge?
Try checking the state of the pin.
A rising edge results in a on state, whereas a falling edge results in a off state.
So the current state of the pin implies the direction of the most-recent interrupt.
sawdust
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