AM2634: Triggering Interrupt from GPIO input

Sue A

Part Number: AM2634

Tool/software:

Hi TI Experts,

I am looking to set up an interrupt in software that is triggered based on a GPIO input.
When I looked through the tech manual XBAR section, INTXBAR does not take input from GPIO to set up an interrupt. It looks like I have to get the GPIO input from INPUTXBAR, then route it to another driver which will trigger an interrupt through INTXBAR.

Could you please confirm if my understanding is correct or let me know if there is a way to set up an interrupt that triggers directly from GPIO input?
Thank you!

over 1 year ago

0 Sue A over 1 year ago

Intellectual 320 points

Hello!
I see there is GPIO XBAR Interrupt Router for triggering interrupts from GPIOs, so please disregard my earlier question.

I have few questions related to GPIO INT XBAR -
1) Can we configure only 4 interrupts per core from GPIOs?
2) I want to have an ISR that is triggered from 6 different GPIO pins. However, these pins are in two different GPIO banks. Could you please advice how I can set up only 1 interrupt that is triggered from 6 different GPIO input pins that are spread across two different GPIO banks?

If you can share an example code, that will be much appreciated. Thanks!

0 Brennan Hartigan over 1 year ago in reply to Sue A

TI__Genius 13629 points

Hi Sue,

For your initial question, please reference this E2E thread with a similar issue:

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1423589/lp-am263p-am263p-input-interrupt-not-triggering-gpio_input_interrupt_am263px

I will get back to you on your follow up question shortly.

Regards,

Brennan

0 Akshit Pareek over 1 year ago in reply to Brennan Hartigan

TI__Expert 4230 points

Hi Sue,

Please refer to the following faq to understand how to Configure GPIO Interrupts in AM263x.
[FAQ] MCU-PLUS-SDK-AM263X: Configuring GPIO Interrupts

Regards,
Akshit

0 Sue A over 1 year ago in reply to Akshit Pareek

Intellectual 320 points

Hi Akshit,

I have been through this page. I know we can configure an interrupt per GPIO bank or for an individual GPIO pin. However, I want to configure one interrupt for 6 GPIO pins that are in two different GPIO banks. Please let me know if this is possible?
Thanks!

0 Akshit Pareek over 1 year ago in reply to Sue A

TI__Expert 4230 points

Hi Sue,

Unfortunately, same interrupt can't be used for GPIO pins on different banks, due to different internal hardware routing of the pins of same banks to their interrupts.

Regards,
Akshit

0 Sue A over 1 year ago in reply to Akshit Pareek

Intellectual 320 points

Thank you for confirming, Akshit.

Is it possible to group 6 GPIO inputs into one INPUT XBAR output? Or is there any other way I could group these 6 GPIO inputs together?

Thanks!

0 Akshit Pareek over 1 year ago in reply to Sue A

TI__Expert 4230 points

Hi Sue,

Apologies for the delay!

Let me try to figure out a way and get back to you on this.

Regards,
Akshit

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AM2634: Triggering Interrupt from GPIO input