顾名思义 免费的实时操作系统
用法基本和Linux下的多线程编程类似
探索者开发版实验
动态创建4个任务start_task task1 task2 task3 优先级依次为1 2 3 4 （注意优先级不能为0,0是空闲任务）
我的理解：主线程start_task 主线程 task1 task2 task3为子线程
#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "FreeRTOS.h"
#include "task.h"#define START_TASK_PRIO 1 //任务优先级
#define START_STK_SIZE 120 //任务堆栈
TaskHandle_t Start_Handler;
void start_task(void *pvParameters);#define Task1_TASK_PRIO 2 //任务优先级
#define Task1_STK_SIZE 120 //任务堆栈
TaskHandle_t Task1_Handler;
void task1_task(void *pvParameters);#define Task2_TASK_PRIO 3 //任务优先级
#define Task2_STK_SIZE 120 //任务堆栈
TaskHandle_t Task2_Handler;
void task2_task(void *pvParameters);#define Task3_TASK_PRIO 4 //任务优先级
#define Task3_STK_SIZE 120 //任务堆栈
TaskHandle_t Task3_Handler;
void task3_task(void *pvParameters);//*******************下面注释掉的代码是通过 位带 操作实现IO口控制**************************************int main(void)
{ uart_init(115200);delay_init(168); //初始化延时函数LED_Init(); //初始化LED端口while(1){xTaskCreate((TaskFunction_t) start_task,(char *) "start_task",(uint16_t) START_STK_SIZE,(void *) NULL,(UBaseType_t) START_TASK_PRIO,(TaskHandle_t *) &Start_Handler ); /*lint !e971 Unqualified char types are allowed for strings and single characters only. */vTaskStartScheduler();// 开启任务调度器 注意一定要开启}
}//创建开始任务
void start_task(void *pvParameters)
{//创建task1xTaskCreate((TaskFunction_t) task1_task,(char *) "task1_task",(uint16_t) Task1_STK_SIZE,(void *) NULL,(UBaseType_t) Task1_TASK_PRIO,(TaskHandle_t *) &Task1_Handler ); /*lint !e971 Unqualified char types are allowed for strings and single characters only. *///创建task2xTaskCreate((TaskFunction_t) task2_task,(char *) "task2_task",(uint16_t) Task2_STK_SIZE,(void *) NULL,(UBaseType_t) Task2_TASK_PRIO,(TaskHandle_t *) &Task2_Handler ); /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
//创建task3
xTaskCreate((TaskFunction_t) task3_task,(char *) "task3_task",(uint16_t) Task3_STK_SIZE,(void *) NULL,(UBaseType_t) Task3_TASK_PRIO,(TaskHandle_t *) &Task3_Handler ); /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
vTaskDelete(Start_Handler); }void task1_task(void *pvParameters)
{while(1){printf("task 1 is ok\r\n");vTaskDelay(500);}}
void task2_task(void *pvParameters)
{while(1){printf("task 2 is ok\r\n");vTaskDelay(800);}}
void task3_task(void *pvParameters)
{while(1){printf("task 3 is ok\r\n");vTaskDelay(1000);}
}
