做网站为什么要用源码,wordpress page width,wordpress膜版教程视频,做视频网站利润如何处理一、什么是中断 中断是指计算机运行过程中#xff0c;出现某些意外情况需主机干预时#xff0c;机器能自动停止正在运行的程序并转入处理新情况的程序#xff0c;处理完毕后又返回原被暂停的程序继续运行。
二、中断优先级
任何中断的优先级都大于任务#xff01;
在我们…一、什么是中断 中断是指计算机运行过程中出现某些意外情况需主机干预时机器能自动停止正在运行的程序并转入处理新情况的程序处理完毕后又返回原被暂停的程序继续运行。
二、中断优先级
任何中断的优先级都大于任务
在我们的操作系统中断同样是具有优先级的并且我们也可以设置它的优先级但是他的优先级并不是从 0~15 默认情况下它是从 5~15 0~4 这 5 个中断优先级不是 FreeRTOS 控制的5是取决于 configMAX_SYSCALL_INTERRUPT_PRIORITY。
注意
1. 在中断中必需使用中断相关的函数
2. 中断服务函数运行时间越短越好快进快出
三、实操
3.1、需求 创建一个队列及一个任务按下按键 KEY1 触发中断在中断服务函数里向队列里发送数据任务则阻塞接收队列数据。
3.2、代码
3.2.1、中断
/* USER CODE BEGIN Header */
/********************************************************************************* file stm32f1xx_it.c* brief Interrupt Service Routines.******************************************************************************* attention** Copyright (c) 2024 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directory of this software component.* If no LICENSE file comes with this software, it is provided AS-IS.********************************************************************************/
/* USER CODE END Header *//* Includes ------------------------------------------------------------------*/
#include main.h
#include stm32f1xx_it.h
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include cmsis_os.h
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN TD *//* USER CODE END TD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD *//* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
extern osMessageQId myQueue01Handle;
/* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 *//* USER CODE END 0 *//* External variables --------------------------------------------------------*/
extern TIM_HandleTypeDef htim2;/* USER CODE BEGIN EV *//* USER CODE END EV *//******************************************************************************/
/* Cortex-M3 Processor Interruption and Exception Handlers */
/******************************************************************************/
/*** brief This function handles Non maskable interrupt.*/
void NMI_Handler(void)
{/* USER CODE BEGIN NonMaskableInt_IRQn 0 *//* USER CODE END NonMaskableInt_IRQn 0 *//* USER CODE BEGIN NonMaskableInt_IRQn 1 */while (1){}/* USER CODE END NonMaskableInt_IRQn 1 */
}/*** brief This function handles Hard fault interrupt.*/
void HardFault_Handler(void)
{/* USER CODE BEGIN HardFault_IRQn 0 *//* USER CODE END HardFault_IRQn 0 */while (1){/* USER CODE BEGIN W1_HardFault_IRQn 0 *//* USER CODE END W1_HardFault_IRQn 0 */}
}/*** brief This function handles Memory management fault.*/
void MemManage_Handler(void)
{/* USER CODE BEGIN MemoryManagement_IRQn 0 *//* USER CODE END MemoryManagement_IRQn 0 */while (1){/* USER CODE BEGIN W1_MemoryManagement_IRQn 0 *//* USER CODE END W1_MemoryManagement_IRQn 0 */}
}/*** brief This function handles Prefetch fault, memory access fault.*/
void BusFault_Handler(void)
{/* USER CODE BEGIN BusFault_IRQn 0 *//* USER CODE END BusFault_IRQn 0 */while (1){/* USER CODE BEGIN W1_BusFault_IRQn 0 *//* USER CODE END W1_BusFault_IRQn 0 */}
}/*** brief This function handles Undefined instruction or illegal state.*/
void UsageFault_Handler(void)
{/* USER CODE BEGIN UsageFault_IRQn 0 *//* USER CODE END UsageFault_IRQn 0 */while (1){/* USER CODE BEGIN W1_UsageFault_IRQn 0 *//* USER CODE END W1_UsageFault_IRQn 0 */}
}/*** brief This function handles Debug monitor.*/
void DebugMon_Handler(void)
{/* USER CODE BEGIN DebugMonitor_IRQn 0 *//* USER CODE END DebugMonitor_IRQn 0 *//* USER CODE BEGIN DebugMonitor_IRQn 1 *//* USER CODE END DebugMonitor_IRQn 1 */
}/******************************************************************************/
/* STM32F1xx Peripheral Interrupt Handlers */
/* Add here the Interrupt Handlers for the used peripherals. */
/* For the available peripheral interrupt handler names, */
/* please refer to the startup file (startup_stm32f1xx.s). */
/******************************************************************************//*** brief This function handles EXTI line0 interrupt.*/
void EXTI0_IRQHandler(void)
{/* USER CODE BEGIN EXTI0_IRQn 0 *//* USER CODE END EXTI0_IRQn 0 */HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_0);/* USER CODE BEGIN EXTI0_IRQn 1 *//* USER CODE END EXTI0_IRQn 1 */
}/*** brief This function handles TIM2 global interrupt.*/
void TIM2_IRQHandler(void)
{/* USER CODE BEGIN TIM2_IRQn 0 *//* USER CODE END TIM2_IRQn 0 */HAL_TIM_IRQHandler(htim2);/* USER CODE BEGIN TIM2_IRQn 1 *//* USER CODE END TIM2_IRQn 1 */
}/* USER CODE BEGIN 1 */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) /*中断回调函数*/
{uint32_t rev 2;xQueueSendFromISR(myQueue01Handle ,rev ,NULL) ; /*中断中写队列*/
}
/* USER CODE END 1 */3.2.2、freertos.c
/* USER CODE BEGIN Header */
/********************************************************************************* File Name : freertos.c* Description : Code for freertos applications******************************************************************************* attention** Copyright (c) 2024 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directory of this software component.* If no LICENSE file comes with this software, it is provided AS-IS.********************************************************************************/
/* USER CODE END Header *//* Includes ------------------------------------------------------------------*/
#include FreeRTOS.h
#include task.h
#include main.h
#include cmsis_os.h/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include stdio.h
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD *//* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN Variables *//* USER CODE END Variables */
osThreadId defaultTaskHandle;
osMessageQId myQueue01Handle;/* Private function prototypes -----------------------------------------------*/
/* USER CODE BEGIN FunctionPrototypes *//* USER CODE END FunctionPrototypes */void StartDefaultTask(void const * argument);void MX_FREERTOS_Init(void); /* (MISRA C 2004 rule 8.1) *//* GetIdleTaskMemory prototype (linked to static allocation support) */
void vApplicationGetIdleTaskMemory( StaticTask_t **ppxIdleTaskTCBBuffer, StackType_t **ppxIdleTaskStackBuffer, uint32_t *pulIdleTaskStackSize );/* USER CODE BEGIN GET_IDLE_TASK_MEMORY */
static StaticTask_t xIdleTaskTCBBuffer;
static StackType_t xIdleStack[configMINIMAL_STACK_SIZE];void vApplicationGetIdleTaskMemory( StaticTask_t **ppxIdleTaskTCBBuffer, StackType_t **ppxIdleTaskStackBuffer, uint32_t *pulIdleTaskStackSize )
{*ppxIdleTaskTCBBuffer xIdleTaskTCBBuffer;*ppxIdleTaskStackBuffer xIdleStack[0];*pulIdleTaskStackSize configMINIMAL_STACK_SIZE;/* place for user code */
}
/* USER CODE END GET_IDLE_TASK_MEMORY *//*** brief FreeRTOS initialization* param None* retval None*/
void MX_FREERTOS_Init(void) {/* USER CODE BEGIN Init *//* USER CODE END Init *//* USER CODE BEGIN RTOS_MUTEX *//* add mutexes, ... *//* USER CODE END RTOS_MUTEX *//* USER CODE BEGIN RTOS_SEMAPHORES *//* add semaphores, ... *//* USER CODE END RTOS_SEMAPHORES *//* USER CODE BEGIN RTOS_TIMERS *//* start timers, add new ones, ... *//* USER CODE END RTOS_TIMERS *//* Create the queue(s) *//* definition and creation of myQueue01 */osMessageQDef(myQueue01, 16, uint16_t);myQueue01Handle osMessageCreate(osMessageQ(myQueue01), NULL);/* USER CODE BEGIN RTOS_QUEUES *//* add queues, ... *//* USER CODE END RTOS_QUEUES *//* Create the thread(s) *//* definition and creation of defaultTask */osThreadDef(defaultTask, StartDefaultTask, osPriorityNormal, 0, 128);defaultTaskHandle osThreadCreate(osThread(defaultTask), NULL);/* USER CODE BEGIN RTOS_THREADS *//* add threads, ... *//* USER CODE END RTOS_THREADS */}/* USER CODE BEGIN Header_StartDefaultTask */
/*** brief Function implementing the defaultTask thread.* param argument: Not used* retval None*/
/* USER CODE END Header_StartDefaultTask */
void StartDefaultTask(void const * argument)
{/* USER CODE BEGIN StartDefaultTask */uint32_t rev 0;/* Infinite loop */for(;;){if(xQueueReceive(myQueue01Handle ,rev ,portMAX_DELAY) pdTRUE) /*读队列*/printf(rev %d\r\n,rev);osDelay(1);}/* USER CODE END StartDefaultTask */
}/* Private application code --------------------------------------------------*/
/* USER CODE BEGIN Application *//* USER CODE END Application */
