STM32F103中断嵌套进不去

只看该作者 · 2009-12-16 20:48

我按照下面设置：
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
// Enable the TIM2 global Interrupt
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

// Enable the TIM3 global Interrupt
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
其中TIM2为0.5ms中断，TIM3为10ms中断，但是我故意在TIM3中断服务程序中放了一个while(1);，然后在TIM2中断里设断点，看是否能正常进入，结果只进去一次就没了，停在TIM3的那个while上，中断嵌套不了？？不应该啊