freertos 软件定时器

最新推荐文章于 2025-03-18 10:59:13 发布

terastudio

最新推荐文章于 2025-03-18 10:59:13 发布

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本文链接：https://blog.youkuaiyun.com/terastudio/article/details/106302873

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本文介绍了如何在FreeRTOS中创建和使用软件定时器。通过示例代码展示了如何创建两个定时器，设置不同周期，并定义回调函数处理定时器事件。定时器的启动、停止和活动状态检查等功能也得到了演示。

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TimerHandle_t xTTimerHd1;
TimerHandle_t xTTimerHd2;
void vTimerCallback(void)
{
static u32 a = 1;
u32 b = 0;
printf(“fast：%d\r\n”,a++);
//xTimerReset( xTTimerHd2, 0 );
if(a==5)
xTimerStop(xTTimerHd2,0);
b = xTimerIsTimerActive(xTTimerHd2);
printf(“b is：%d\r\n”,b);
b = xTimerIsTimerActive(xTTimerHd1);

}

void vTimerCallback2(void)
{
static u8 a = 1;
printf(“slow：%d\r\n”,a++);
}

xTTimerHd1 = xTimerCreate( /* Just a text name, not used by the RTOS kernel. /
“Timer1”,
/ The timer period in ticks, must be greater than 0. /
1000/portTICK_PERIOD_MS,
/ The timers will auto-reload themselves when they
expire. /
pdTRUE,
/ The ID is used to store a count of the number of
times the timer has expired, which is initialized to 0. /
( void * ) 0,
/ Each timer calls the same callback when it expires. /
vTimerCallback );
xTTimerHd2= xTimerCreate( / Just a text name, not used by the RTOS kernel. /
“Timer3”,
/ The timer period in ticks, must be greater than 0. /
2000/portTICK_PERIOD_MS,
/ The timers will auto-reload themselves when they
expire. /
pdTRUE,
/ The ID is used to store a count of the number of
times the timer has expired, which is initialized to 0. /
( void * ) 0,
/ Each timer calls the same callback when it expires. */
vTimerCallback2 );