【AT-START-L021测评】FreeRTOS挂起和恢复任务
代码：#include "at32l021_board.h"
#include "at32l021_clock.h"
#include "FreeRTOS.h"
#include "task.h"
/** @addtogroup UTILITIES_examples
* @{
*/
/** @addtogroup FreeRTOS_demo
* @{
*/
TaskHandle_t led2_handler;
TaskHandle_t led3_handler;
/* led2 task */
void led2_task_function(void *pvParameters);
/* led3 task */
void led3_task_function(void *pvParameters);
/**
* @briefmain function.
* @paramnone
* @retval none
*/
int main(void)
{
system_clock_config();
/* init led2 and led3 */
at32_led_init(LED2);
at32_led_init(LED3);
/* init usart1 */
uart_print_init(115200);
/* enter critical */
taskENTER_CRITICAL();
/* create led2 task */
if(xTaskCreate((TaskFunction_t )led2_task_function,
(const char* )"LED2_task",
(uint16_t )512,
(void* )NULL,
(UBaseType_t )2,
(TaskHandle_t*)&led2_handler) != pdPASS)
{
printf("LED2 task could not be created as there was insufficient heap memory remaining.\r\n");
}
else
{
printf("LED2 task was created successfully.\r\n");
}
/* create led3 task */
if(xTaskCreate((TaskFunction_t )led3_task_function,
(const char* )"LED3_task",
(uint16_t )512,
(void* )NULL,
(UBaseType_t )2,
(TaskHandle_t*)&led3_handler) != pdPASS)
{
printf("LED3 task could not be created as there was insufficient heap memory remaining.\r\n");
}
else
{
printf("LED3 task was created successfully.\r\n");
}
/* exit critical */
taskEXIT_CRITICAL();
/* start scheduler */
vTaskStartScheduler();
}
/* led2 task function */
void led2_task_function(void *pvParameters)
{
static int i=0;
static int num=0;
while(1)
{
i++;
if(i==5)
{
printf("在任务中挂起task3\r\n");
vTaskSuspend(led3_handler);
}
else if(i==10)
{
printf("在任务中恢复task3\r\n");
vTaskResume(led3_handler);
}
printf("task2_num:%d\r\n",++num);/* 打印数值 */
vTaskDelay(1000);
}
}
/* led3 task function */
void led3_task_function(void *pvParameters)
{
static int num=0;
while(1)
{
printf("task3_num:%d\r\n",++num);/* 打印数值 */
vTaskDelay(500);
}
}
运行效果图：
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