freertos Uart example NVIC_setPriority question

Seongyon_Jeong — Mon, 28 Aug 2023 04:05:16 GMT

IMX RT1020-EVK board. SDK info (SDK_2.x_EVK-MIMXRT1020, SDK version 2.13.0)

After import SDK example - Generated project evkmimxrt1020_freertos_lpuart

In this project, Why NVIC_setPriority func is needed ??

If I do not call this func , Does LPUART1_IRQn has priority 0 ?? ,

Why this make program running- Down ? (exactly, Once interruprt TX_IDLE Occur, and Stopped(blocked?) )

and If set priority 2 or 3,4,5... , it woks well.

but , IRQ priority is not set in Other SDK Example projects, for example, xxxx_lpuart_interrupt , xxxx_lpuart_interrupt _rb_transfer, ..

so, Why , Only evkmimxrt1020_freertos_lpuart - this Example, do I need to set priority ?

Re: freertos Uart example NVIC_setPriority question

Miguel04 — Mon, 28 Aug 2023 18:34:46 GMT

Hi @Seongyon_Jeong

If you are using FreeRTOS, it is needed to set the priority manually.

"Therefore, any interrupt service routine that uses an RTOS API function must have its priority manually set to a value that is numerically equal to or greater than the configMAX_SYSCALL_INTERRUPT_PRIORITY setting."

This information is from: freertos NVIC priority and FreeRTOS priority?.

Best Regards, Miguel.

i.MX Processorsのトピックfreertos Uart example NVIC_setPriority question

freertos Uart example NVIC_setPriority question

Re: freertos Uart example NVIC_setPriority question