MCXA153VLH LPUART INTERRUPT

[_Ferrari_]

I'm developing a project based on the MCXA153VLH microprocessor.

It needs to receive data serially using the LPUART1 peripheral in interrupt mode.

_Ferrari__0-1754062818351.png

Upon receiving data, a dedicated interrupt routine named Rs485Interrupt should be called.

_Ferrari__1-1754062881026.png

I've debugged the code, and the interrupt handler is called correctly,

_Ferrari__2-1754062913014.png

but the s_lpuartIsr array is not initialized, and the program crashes.

_Ferrari__4-1754063033454.png

Have you experienced a similar issue? How did you solve it?

Thank you very much for your help and cooperation

regards

[Habib_MS]

Hello @_Ferrari_,

You need to redefine the IRQ, as explained in the tooltip that appears when you hover over the option:

Habib_MS_0-1754339824589.png

To help with this, you can use the name that you assign to the IRQ handler. for example, the default name "LPUART1_SERIAL_RX_TX_IRQHANDLER", which can be found in peripherals.h:

Habib_MS_1-1754339834965.png

Additionally, I recommend see the SDK (version 25.6) example titled "lpuart_interrupt". It demonstrates how to properly configure an interrupt and provides a good reference for understanding how it works.

BR
Habib.

[_Ferrari_ · Accepted solution]

Thanks for your help, Habib_MS. I found the solution to the problem. It was because my interrupt handling routine was in a .cpp file.

Changing the file extension from .cpp to .c solved the issue.