LPC MicrocontrollersのトピックRe: LPC4357 NVIC

LPC4357 NVIC

hbxiao168 — Mon, 29 May 2023 09:50:04 GMT

NVIC_SetPriority(TIMER1_IRQn, NVIC_EncodePriority(0,1,0));

NVIC_SetPriority(TIMER0_IRQn, NVIC_EncodePriority(0,2,0));

but I try to use this function

NVIC_GetPriority(TIMER0_IRQn))；// return 0

NVIC_GetPriority(TIMER1_IRQn); // return 0

why ?

Ths！

Re: LPC4357 NVIC

Alice_Yang — Tue, 30 May 2023 06:47:31 GMT

Hello @hbxiao168

I tested with lpc4337(the same with lpc4357), use below code, it can works well:

Alice

Re: LPC4357 NVIC

hbxiao168 — Tue, 30 May 2023 07:29:17 GMT

Thanks @Alice_Yang

I will try，and i want know __NVIC_PRIO_BITS = ？in you code？

#define __NVIC_PRIO_BITS 7 /*!< Number of Bits used for Priority Levels */

Re: LPC4357 NVIC

hbxiao168 — Tue, 30 May 2023 07:31:00 GMT

how to set the __NVIC_PRIO_BITS?
the register AIRCR Interrupt priority group default configuration, and __NVIC_PRIO_BITS = 7 ?

Re: LPC4357 NVIC

Alice_Yang — Tue, 30 May 2023 09:18:17 GMT

Hello @hbxiao168

You can directly write the Interrupt priority.

If you want to use "NVIC_EncodePriority()", you need refer to the function code and ARM manual to check how to use it.

Alice