中断优先级的问题

2万 · 2015-9-29 21:04

[size=11.818181991577148px]stm32程序中两个中断一个是串口中断另一个是红外触发中断
[size=11.818181991577148px]  串口中断函数
[size=11.818181991577148px]    void NVIC_Configuration1(void)
[size=11.818181991577148px]{
[size=11.818181991577148px]       NVIC_InitTypeDef NVIC_InitStructure;
[size=11.818181991577148px]       /* Configure the NVIC Preemption Priority Bits */
[size=11.818181991577148px]       NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
[size=11.818181991577148px]
[size=11.818181991577148px]       /* Enable the USARTy Interrupt */
[size=11.818181991577148px]       NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
[size=11.818181991577148px]       NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
[size=11.818181991577148px]       NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
[size=11.818181991577148px]       NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
[size=11.818181991577148px]       NVIC_Init(&NVIC_InitStructure);
}

红外接收中断
static void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  /* Configure one bit for preemption priority */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

  /* ÅäÖÃP[A|B|C|D|E]11ÎªÖÐ¶ÏÔ´ */
  NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 5;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}
红外线的触发中断优先级大于串口的啊？怎么红外的触发不好使呢
PS:当串口配置
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART3, USART_IT_TXE, ENABLE);
这俩句取消之后，红外线的中断就可以这是什么原因呢，有需要怎么设置呢，
请教下各位

2万 · 2015-9-29 21:04

红外与串口硬件部分冲突了吧

2万 · 2015-9-29 21:04

改成串口1，与这俩句无关。
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART3, USART_IT_TXE, ENABLE);
但是我吧中断的串口中断优先级改为
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
而红外的的中断改为
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 5;
也不响应，哪里出错了呢

2万 · 2015-9-29 21:05

串口中断都关了也不响应吗？

2万 · 2015-9-29 21:05

我把TM2，串口2（后改的），红外中断
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);                                              //1组抢占优先级
TIM 2          抢占优先为0 ，相应优先为1
红外中断    抢占优先为0 ，相应优先为0
串口2       抢占优先为1，相应优先为2
但是红外中断没反应
可是还把串口2的
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART2, USART_IT_TXE, ENABLE);
这两句屏蔽就能相应红外中断，我想不明白，  不像是优先级设置的问题，

2万 · 2015-9-29 21:06

试过不管串口2的优先级比红外的高于低

2万 · 2015-9-29 21:06

试过，没用

只看该作者 · 2015-9-29 21:58

红外与串口硬件部分冲突？