Processor Expert Software中的主题 MCXA153VLH LPUART INTERRUPT

MCXA153VLH LPUART INTERRUPT

_Ferrari_ — Fri, 01 Aug 2025 15:45:19 GMT

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

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

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

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

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

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

Thank you very much for your help and cooperation

regards

Re: MCXA153VLH LPUART INTERRUPT

Habib_MS — Mon, 04 Aug 2025 20:38:18 GMT

Hello @_Ferrari_,

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

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:

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.

Re: MCXA153VLH LPUART INTERRUPT

_Ferrari_ — Tue, 05 Aug 2025 21:56:22 GMT

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.