[FreeRTOS] FreeRTOS学习笔记：通过任务参数传入需要打印输出的文本

caizhiwei 2015-4-22 14:43 楼主

#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "croutine.h"
#include "bsp.h"
/*
**********************************************************************************************************
函数声明
**********************************************************************************************************
*/
static void AppTaskCreate (void);
extern void vSetupTimerTest( void );
/*
**********************************************************************************************************
变量声明
**********************************************************************************************************
*/
xTaskHandle xHandleTask3;
int8_t pcWriteBuffer[500];
/*
*********************************************************************************************************
* 函数名: main
* 功能说明: 标准c程序入口。
* 形参：无
* 返回值: 无
*********************************************************************************************************
*/
static const char *pcTextForTask1 ="Task 1 is running\r\n";
static const char *pcTextForTask2 ="Task 2 is running\t\n";
int main(void)
{
/* 硬件初始化 */
bsp_Init();
/* 创建任务 */
AppTaskCreate();
vSetupTimerTest();
/* 启动调度，开始执行任务 */
vTaskStartScheduler();
/*
If all is well we will never reach here as the scheduler will now be
running. If we do reach here then it is likely that there was insufficient
heap available for the idle task to be created.
*/
while (1);
}
/*
*********************************************************************************************************
* 函数名: vTask1
* 功能说明: LED闪烁
* 形参：pvParameters 是在创建该任务时传递的形参
* 返回值: 无
*********************************************************************************************************
*/
void vTask1( void *pvParameters )
{
portTickType xDelay, xNextTime;
//char *pcTaskName = (char*)pvParameters;
xNextTime = xTaskGetTickCount () + ( portTickType ) 1000;
while(1)
{
bsp_LedToggle(LED1);
//printf("\r\n%s",pcTaskName);
printf("\r\n%s",(char*)(pvParameters));
/* 用vTaskDelay实现vTaskDelayUntil() */
xDelay = xNextTime - xTaskGetTickCount ();
xNextTime += ( portTickType ) 1000;
if( xDelay <= ( portTickType ) 1000 )
{
vTaskDelay( xDelay );
}
}
}
/*
*********************************************************************************************************
* 函数名: vTask2
* 功能说明: LED闪烁
* 形参：pvParameters 是在创建该任务时传递的形参
* 返回值: 无
*********************************************************************************************************
*/
void vTask2( void *pvParameters )
{
portTickType xLastWakeTime;
const portTickType xFrequency = 100;
// Initialise the xLastWakeTime variable with the current time.
xLastWakeTime = xTaskGetTickCount();
while(1)
{
bsp_LedToggle(LED2); // Wait for the next cycle.
vTaskDelayUntil( &xLastWakeTime, xFrequency );
}
}
/*
*********************************************************************************************************
* 函数名: vTask3
* 功能说明: LED闪烁
* 形参：pvParameters 是在创建该任务时传递的形参
* 返回值: 无
*********************************************************************************************************
*/
void vTask3( void *pvParameters )
{
while(1)
{
/* 挂起自己，可以写NULL或者xHandleTask3句柄，都可以的 */
vTaskSuspend( NULL );
bsp_LedToggle(LED3);
}
}
/*
*********************************************************************************************************
* 函数名: vTask4
* 功能说明: LED闪烁
* 形参：pvParameters 是在创建该任务时传递的形参
* 返回值: 无
*********************************************************************************************************
*/
void vTask4( void *pvParameters )
{
portTickType xLastWakeTime;
const portTickType xFrequency = 1000;
// Initialise the xLastWakeTime variable with the current time.
xLastWakeTime = xTaskGetTickCount();
while(1)
{
vTaskResume(xHandleTask3);
vTaskList((char *)&pcWriteBuffer);
printf("%s\r\n", pcWriteBuffer);
vTaskGetRunTimeStats(( char *)&pcWriteBuffer);
printf("%s\r\n", pcWriteBuffer);
vTaskDelayUntil( &xLastWakeTime, xFrequency );
}
}
/*
*********************************************************************************************************
* 函数名: AppTaskCreate
* 功能说明: 创建应用任务
* 形参：无
* 返回值: 无
*********************************************************************************************************
*/
static void AppTaskCreate (void)
{
/* Create one task. */
xTaskCreate( vTask1, /* Pointer to the function that implements the task. */
"Task 1", /* Text name for the task. This is to facilitate debugging only. */
500, /* Stack depth in words. */
(void*)pcTextForTask1, /*通过任务参数传入需要打印输出的文本. */
1, /* This task will run at priority 1. */
NULL ); /* We are not using the task handle. */
/* Create one task. */
xTaskCreate( vTask2, /* Pointer to the function that implements the task. */
"Task 2", /* Text name for the task. This is to facilitate debugging only. */
500, /* Stack depth in words. */
NULL, /* We are not using the task parameter. */
2, /* This task will run at priority 2. */
NULL ); /* We are not using the task handle. */
/* Create one task. */
xTaskCreate( vTask3, /* Pointer to the function that implements the task. */
"Task 3", /* Text name for the task. This is to facilitate debugging only. */
500, /* Stack depth in words. */
NULL, /* We are not using the task parameter. */
3, /* This task will run at priority 2. */
&xHandleTask3 );
/* Create one task. */
xTaskCreate( vTask4, /* Pointer to the function that implements the task. */
"Task 4", /* Text name for the task. This is to facilitate debugging only. */
500, /* Stack depth in words. */
NULL, /* We are not using the task parameter. */
4, /* This task will run at priority 2. */
NULL ); /* We are not using the task handle. */
}

gitee/casy

回复评论（2）

沙发 caizhiwei

实验结果：

gitee/casy

点赞 2015-4-22 14:44

板凳我无聊

printf("\r\n%s",(char*)(pvParameters));

原码在哪？如何改为其他串口？

点赞 2016-5-14 15:18

[FreeRTOS] FreeRTOS学习笔记：通过任务参数传入需要打印输出的文本

回复评论 （2）

沙发 caizhiwei

板凳 我无聊

回复评论（2）

板凳我无聊