> For the complete documentation index, see [llms.txt](https://nxp.gitbook.io/nxp-cup/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nxp.gitbook.io/nxp-cup/2024-fall-2025-nxp-cup-bare-metal-drivers/s32-design-studio-usage-tips/using-interrupts.md).

# Using interrupts

### Using interrupts

To set up an interrupt, you must add it in the **Platform** RTD driver. In the Interrupt Controller tab, add a new entry to the table. In the **Interrupt Name** column you must select the hardware interrupt you want to use. In the **Handler** column you need to put the isr name the driver expects.

<figure><img src="/files/aZks1hQX9BnSHHPFMEce" alt=""><figcaption></figcaption></figure>

To find the isr name the driver expects, you must search for it in the RTD driver source code.&#x20;

<figure><img src="/files/tuuX0sSxlLymJT0nZG9b" alt=""><figcaption><p>Path to the RTD drivers</p></figcaption></figure>

For example, if you want an interrupt on a PWM channel that is using a FTM hardware instance, you must look in **Ftm\_Pwm\_Ip\_Irq.h**

<figure><img src="/files/zmIOGh97M97aTwd3N7BA" alt=""><figcaption><p>Path to the file Ftm_Pwm_Irq.h</p></figcaption></figure>

Inside the file, search for ***ISR(*** with any app you want using **Ctrl + f**. In this example you can see the search in Notepad++.

<figure><img src="/files/62VO8QvIGGJJgRcHcy62" alt=""><figcaption><p>Search results are displayed on the bottom</p></figcaption></figure>

Search for the name of the isr that you need and copy it. For example, to setup an interrupt on a rising/falling edge of a PWM signal using FTM instance 1 channel 1, copy the name **FTM\_1\_CH\_0\_CH\_1\_ISR.** Go back to the Platform driver and paste the name in the **Handler** column.