Configure the Rx_Data_Register_Full Interrupt for ADMA LPUART0 on the CM4 core.
Here’s what I’ve tried:
All A35 cores have been disabled via U-Boot, so only the CM4 core is active.
ADMA LPUART0 operates correctly in polling mode for both reading and writing.
Although the interrupt has been configured, it is not triggering.
Questions:
How can this issue be resolved?
Could you please provide an example code for configuring this interrupt? (Note: An example for the CM4 dedicated UART is not needed.)
Is it necessary to configure IRQSTEER for this interrupt? If so, when and where should IRQSTEER be configured? Please include a demonstration code if possible.
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Hello,
To configure the Rx Data Register Full interrupt for ADMA LPUART0 on the CM4 core of the iMX8X Colibri module, you need to ensure that the interrupt is correctly set up and routed. Here are some steps and considerations:
IRQSTEER Configuration: The iMX8X architecture uses an interrupt steering module (IRQSTEER) to route interrupts from peripherals to the appropriate core. For the CM4 core to handle the LPUART0 interrupt, you may need to configure IRQSTEER to ensure the interrupt is routed correctly.
Example Configuration: Typically, you would configure IRQSTEER in your initialization code. Ensure that the interrupt source for LPUART0 is enabled in the IRQSTEER registers. This might involve setting the appropriate bits in the IRQSTEER control registers to allow the CM4 core to receive the interrupt.
Interrupt Setup: Ensure that the interrupt is enabled and prioritized correctly on the CM4 core.
Use LPUART_EnableInterrupts(ADMA__LPUART0, kLPUART_RxDataRegFullInterruptEnable); to enable the specific interrupt.
Use EnableIRQ(ADMA_UART0_INT_IRQn); to enable the interrupt in the NVIC.
Set the priority using NVIC_SetPriority(ADMA_UART0_INT_IRQn, 0x07); or another appropriate priority level.
Troubleshooting:
Verify that the CM4 core is correctly initialized and running.
Check that the LPUART0 peripheral is correctly configured and enabled.
Ensure that the interrupt vector table is correctly set up to point to your interrupt handler.
Confirm that no other parts of the system are inadvertently masking or disabling the interrupt.
While specific example code for IRQSTEER configuration is not provided here, these steps should guide you in resolving the issue. If the problem persists, reviewing the iMX8X reference manual for detailed register settings and further configuration options may be helpful.
Best regards,
Toradex AI Assistant.
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