f103vct6 外部中断运行一段时间后无法进入

bro0310

搞了几天了，找不到原因，不知各路大神是否有遇到类似问题，指导一下，问题描述如下：
根据外部中断EXTI0、EXTI1来改变某PD8的输出电平，当此IO输出电平持续在低电平1ms以上时，触发定时器6,当PD8为低电位时，外部电路隔一段时间后会触发EXTI0, 当PD8为高电位时，又会触发EXTI1 中断，理论上开启后如果不关闭外部中断，会输出PD8循环振荡，单工作一段时间后，输出停止了

1. void EXTI_Configuration()
   
2. {
   
3.     EXTI_InitTypeDef EXTI_InitStructure;
   
4.     NVIC_InitTypeDef NVIC_InitStructure;
   
5. #ifdef   VECT_TAB_RAM
   
6.     /* Set the Vector Table base location at 0x20000000 */
   
7.     NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
   
8. #else   /* VECT_TAB_FLASH   */
   
9.     /* Set the Vector Table base location at 0x08000000 */
   
10.     NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
    
11. #endif
    
12. 
    
13.     /* Configure the NVIC Preemption Priority Bits */  
    
14.     NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
    
15. 
    
16. 
    
17.     EXTI_ClearITPendingBit(EXTI_Line0);
    
18.     EXTI_ClearITPendingBit(EXTI_Line1);
    
19.     GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource0);
    
20.     GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource1);
    
21.     EXTI_InitStructure.EXTI_Line = EXTI_Line0 | EXTI_Line1;     //选择中断线路0 1
    
22. 
    
23. 
    
24.     EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;         //设置为中断请求，非事件请求
    
25.     EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;     //设置中断触发方式为下降沿触发
    
26.     EXTI_InitStructure.EXTI_LineCmd = ENABLE;                   //外部中断使能
    
27.     EXTI_Init(&EXTI_InitStructure);
    
28.     EXTI->IMR&=~(1|1<<1);
    
29. 
    
30.     /*允许EXTI0中断 */
    
31.     NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
    
32.     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    
33.     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    
34.     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    
35.     NVIC_Init(&NVIC_InitStructure);
    
36. 
    
37.     /*允许EXTI1中断 */
    
38.     NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
    
39.     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    
40.     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    
41.     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    
42.     NVIC_Init(&NVIC_InitStructure);
    
43. ｝
    
44. 
    
45. void EXTI0_IRQHandler(void)
    
46. {
    
47. if (RESET!=(EXTI->PR&EXTI_Line0))
    
48. {
    
49.         EXTI->PR = EXTI_Line0;
    
50.         if (RESET!=(EXTI->IMR&EXTI_Line0))
    
51.         {
    
52.             TAG.FbCurcuit1 = 1;
    
53.             GPIOD->BSRR = GPIO_Pin_8;
    
54.             if (0==Hall1)
    
55.             {
    
56.                 EXTI->IMR&=~(EXTI_Line0);
    
57.                 TIM6->SR = (uint16_t)~TIM_IT_Update;
    
58.                 TIM6->CR1 &= ((uint16_t)~TIM_CR1_CEN);
    
59.                 Hall1 = 1;
    
60.             }
    
61.             else
    
62.             {
    
63.                 TIM6->CNT = 0;
    
64.                 TIM6->SR = (uint16_t)~TIM_IT_Update;
    
65.                 TIM6->CR1 |= TIM_CR1_CEN;
    
66.             }
    
67.         }
    
68.         EXTI->PR = EXTI_Line0;
    
69.     }
    
70. }
    
71. 
    
72. void EXTI1_IRQHandler(void)
    
73. {
    
74.     if (RESET!=(EXTI->PR&EXTI_Line1))
    
75.     {
    
76.         EXTI->PR = EXTI_Line1;
    
77.         if (RESET!=(EXTI->IMR&EXTI_Line1))
    
78.         {
    
79.             GPIOD->BRR = GPIO_Pin_8;
    
80.             TIM6->SR = (uint16_t)~TIM_IT_Update;
    
81.             TIM6->CR1 &= ((uint16_t)~TIM_CR1_CEN);
    
82.         }
    
83.         EXTI->PR = EXTI_Line1;
    
84.     }
    
85. }
    

复制代码

启动这个功能后，运行一段时间后，会进入定时器6的中断，跟踪发现是某个EXTI1中断没有得到执行，检查了所有相关的配置以及设计到相关IO操作的地方，没有发现异常，现贴出部分跟踪数据：


在TIM6中断服务程序入口处设置断点，从上面截图中可以看到 EXTI1 中断标志位PR1 是有被置位的， 但EXTI0 EXTI1 最后一次触发时间是418.00248863,  ，而TIM6触发是在 418.00408187, , 可见是因为EXTI1未得到执行从而导致TIM6未关闭而进入了TIM6中断，此时外部中断PR1已经是置位的，为什么EXTI1有发生中断却进不了中断函数呢，而开始是可以进去的呢

上图是PE0和PE1的输入，黄色是PE0，新人没分，还请大神们不吝赐教
补充一下  exti0服务程序中  Hall1分支各位看官可以忽略，  进入前其值为1

三叶草

中断优先级怎么配置的，看看配置是否合理

bro0310

三叶草 发表于 2020-11-13 16:22
中断优先级怎么配置的，看看配置是否合理

    /* Enable the USART1 Interrupt */
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
        
    /* Enable the UART4 Interrupt */
    NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
               
    /* Enable the TIM2 global Interrupt */
    NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;   //抢断优先级3
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;                     //响应优先级0
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;                                //允许中断
    NVIC_Init(&NVIC_InitStructure);                                                                //写入设置


    /* Enable the TIM3 global Interrupt */
    NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    /* Enable the TIM4 global Interrupt */
    NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);        

     /*允许EXTI0中断 */
    NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    /*允许EXTI1中断 */
    NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
    /* Enable the TIM6 global Interrupt */
    NVIC_InitStructure.NVIC_IRQChannel = TIM6_IRQn;       
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

bro0310

谢谢关注，花了好长时间单步  刚执行完exti0中断   就进入了tim6中断  而exti0 中断里面清了tim6计数和挂起标识，然后才开启的计数器，从我贴的波形图可以看出，外部中断的周期很准确的在20us左右，而tim6定时为1000us, 按理来说tim6不会触发中断(虽然说单步确实进去了，但我对单步结果持怀疑态度，毕竟时序和真实情况不一样)，单步的时候真实情况是tim6的ARR为0xC8, 而从exti0中断单步出来时，并没有进其它中断子程序的情况下， tim6的CNT值是不等的值，最大为A9，按理来说刚出来应为0了。