topic ADMA UART0 interrupt enable issue on lpuart_interrupt example (SDK_2.9.0_MIMX8QX5xxxFZ) in MCUXpresso SDK

ADMA UART0 interrupt enable issue on lpuart_interrupt example (SDK_2.9.0_MIMX8QX5xxxFZ)

emolina-ebers — Thu, 28 Oct 2021 06:47:23 GMT

Hello all,

This example by default uses CM4 UART, but I'm trying to modify code to work with ADMA UART0. So far, I have been hable to change code configuration to send and receive with blocking functions (lpuart_polling example).

Sadly I can't get the interrupt handle working in the example.

I have attached the whole project for more information (it can be opened and compiled with MCUXpresso IDE).

I'm very confused about how it works, because definition "#define DEMO_LPUART_IRQHandler ADMA_UART0_INT_IRQHandler" seem to reference to the fsl_adapter_lpuart.c component, however I am not sure if it compiles because ifdef.

In the unmodified example with M4 UART, which is working fine for me, what I mention about fsl_adapter_lpuart.c looks similar.

In the example code only uses "LPUART_EnableInterrupts" and "EnableIRQ" to configure interrupt. There is no any mention to the handler except in a define.

If you could help me, it will be very appreciated.

Re: ADMA UART0 interrupt enable issue on lpuart_interrupt example (SDK_2.9.0_MIMX8QX5xxxFZ)

Juan-Rodarte — Mon, 06 Dec 2021 04:18:16 GMT

Hello.

If it works fine in the unmodified example you'd better use that one.
In the interrupt configuration you don't include the handler because you define it with the ADMA_UART0_INT_IRQHandler

Re: ADMA UART0 interrupt enable issue on lpuart_interrupt example (SDK_2.9.0_MIMX8QX5xxxFZ)

emolina-ebers — Thu, 09 Dec 2021 07:22:30 GMT

Thank you for you response.

Sorry, I forgot this topic, I found the solution time ago. Since ADMA is in other subsystem different from CortexM4, it is needed to use IRQSteer API.

/* Enable interrupt in irqsteer */
IRQSTEER_Init(IRQSTEER);
IRQSTEER_EnableInterrupt(IRQSTEER, ADMA_UART0_INT_IRQn);

If someone is struggling with this, maybe this mention could help.