FreeRTOS中断测试

朱雀 2022-06-02 04:21 150阅读 0赞

**configMAX\_SYSCALL\_INTERRUPT\_PRIORITY**  
高于此优先级的中断，不能被禁止

#ifdef __NVIC_PRIO_BITS
        #define configPRIO_BITS __NVIC_PRIO_BITS
    #else
        #define configPRIO_BITS 4 
    #endif
    
    #define configLIBRARY_LOWEST_INTERRUPT_PRIORITY 15 //中断最低优先级
    #define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY 5 //系统可管理的最高中断优先级
    #define configKERNEL_INTERRUPT_PRIORITY ( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
    #define configMAX_SYSCALL_INTERRUPT_PRIORITY ( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )

![1][]  
**测试举例**

int main(void)
    {
        NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);//设置系统中断优先级分组4
    
        TIM3_Int_Init(10000-1,7200-1);      //初始化定时器3，定时器周期1S
        TIM5_Int_Init(10000-1,7200-1);      //初始化定时器5，定时器周期1S
    
        //创建中断测试任务
        xTaskCreate((TaskFunction_t )interrupt_task,            //任务函数
                    (const char*    )"interrupt_task",          //任务名称
                    (uint16_t       )INTERRUPT_STK_SIZE,        //任务堆栈大小
                    (void*          )NULL,                      //传递给任务函数的参数
                    (UBaseType_t    )INTERRUPT_TASK_PRIO,       //任务优先级
                    (TaskHandle_t*  )&INTERRUPTTask_Handler);   //任务句柄
    }
    
    //中断测试任务函数 
    void interrupt_task(void *pvParameters)
    {
        static u32 total_num=0;
        while(1)
        {
            total_num+=1;
            if(total_num==5) 
            {
                printf("关闭中断.............\r\n");
                portDISABLE_INTERRUPTS();               //关闭中断
                delay_xms(5000);                        //延时5s
                printf("打开中断.............\r\n");    //打开中断
                portENABLE_INTERRUPTS();
            }
            vTaskDelay(1000);
        }
    }

**测试效果**  
![1][1 1]

[1]: /images/20220602/ac2c5ef2c0584dc78e0ecc83a82e011b.png
[1 1]: /images/20220602/0ce1324cb8ff414ebf0ac29ee0ed5b56.png