我师傅写的中端初始化函数，我觉得不对吧？

贵在坚持

void NVIC_Configuration(void)

{

NVIC_InitTypeDef NVIC_InitStructure;

// NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);

/* Configure one bit for preemption priority */

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

/*UART2*/

NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

/*UART3*/

NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

/*TIM*/

NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);
}

这样所有中断的优先级都一样可以吗？万一要是两个中断同时发生了会发生什么后果？

正点原子

回复【楼主位】贵在坚持:
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是可以这么设置的，如果同时发生了，那就按固定的编号来决定优先级，向量号越小，优先级越高。

贵在坚持

回复【2楼】正点原子:
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stm32给了那么多不同的优先级不用岂不是很浪费啊，对于上边的代码给他们分出不同的优先级来是不是比这样更合理点？

贵在坚持

回复【2楼】正点原子:
---------------------------------同一个抢占优先级、不同响应优先级的两个中断，那么那个响应优先级高的中断能否打断响应优先级低的中断？

不会起名的小伙

回复【4楼】贵在坚持:
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当抢占优先级一样时，响应优先级不同时，是要分情况的
1.当这两个中断同时发生时，则响应优先级高的先进行。优先级低的会被悬挂
2.当一个中断正在发生，另一个中断来时。无论来的中断响应优先级有多高，都会被悬挂
你师父的代码的意思是：中断同时来时由硬件决定谁先执行。