LPC11C24 Interrupt Logic

[f_fiorini]

Hi all,

I'm developing some software for a PCB using the LPC11C24 board as MCU, and I have a doubt regarding the interrupt logic.
As far as I know, I can define a WAKEUP_IRQHandler and a PIOINT0_IRQHandler, the former responsible of waking up the MCU when in (Deep) Sleep mode, the latter just defines a routine whenever any GPIO pin in Port 0 gets triggered accordingly.
I'm currently using pin 0_11 in both WAKEUP logic and to switch between states when the MCU is awake, but I'm unsure of what to expect.

Is it possible to dynamically change the interrupt trigger (from FALLING to RISING edge) and therefore use the same pin for two different interrupt handlers, based on its current interrupt logic?
If so, is there some example I can refer to? Or just have a chat with someone who managed to get this working.

Thank you in advance, any help is appreciated.

Best,

Federico  

[kerryzhou]

Hi Federico Fiorini,

    About the falling or rising edge trigger, you still need to modify the control register to change the edge in your code.

   The chip don't have the hardware function to realize it dynamically, you need associated with your code to realize it.

    Actually, just change the STARTAPRP0 register configuration.

Wish it helps you!

If you still have question about it, please kindly let me know.

With is helps you!

Have a great day,
Kerry

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[f_fiorini]

Thanks for the prompt reply kerryzhou‌!
My original idea was to dynamically change the register configuration from within the interrupt handlers, so that further triggers will be handled in either of the two (WAKEUP_IRQn and PIOINT0_IRQn). 
Do you think this is going to be a proper solution?

Thank you in advance

[kerryzhou]

Hi Federico Fiorini,

     If your original interrupt is triggered, then enter the interrupt, I think you can modify the register in the interrupt handler.

   You can try it on your side, whether it works or not.

If you still have question about it, please kindly let me know.
Have a great day,
Kerry

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- We are following threads for 7 weeks after the last post, later replies are ignored
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