How to configure GPIO9 pins as input with interrupt in i.MX RT1170

[sanjana291]

Hello,
I am working on the i.MX RT1170.
In my project, I have some pins from GPIO9 configured as inputs.
However, in the SDK examples, I do not see a dedicated IRQ handler for GPIO9 (like GPIO9_Combined_x_y_IRQHandler).

I want to enable interrupts for these GPIO9 input pins, but I am not sure:

1. Which IRQ number/handler should I use for GPIO9 in the i.MX RT1170?

2. If GPIO9 does not have its own IRQ, is it combined with another port's IRQ?

[mayliu1]

Hi @sanjana291 ,

Thank you so much for your interest in our products and for using our community.

Regarding your question "Which IRQ number/handler should I use for GPIO9 in the i.MX RT1170? " and  "If GPIO9 does not have its own IRQ, is it combined with another port's IRQ?"

In RT1170 chip, GPIO9 can use  interrupt number 99.

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

Wish you a nice day!

Best Regards
MayLiu

[sanjana291]

I'm asking about GPIO9, can we use GPIO3's IRQ for this instead? but GPIO9 has an IRQ on the CM4

[mayliu1 · Accepted solution]

I suggest you refer to the following link.

https://blog.csdn.net/Oushuwen/article/details/121994692

There are more detail description about GPIO interrupt in RT1170.

Best Regards