rt-thread/examples/kernel/timer_control.c

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/*
*
*
* 1
*/
#include <rtthread.h>
#include "tc_comm.h"
/* 定时器的控制块 */
static rt_timer_t timer1;
static rt_uint8_t count;
/* 定时器超时函数 */
static void timeout1(void* parameter)
{
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rt_tick_t timeout = 50;
rt_kprintf("periodic timer is timeout\n");
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count ++;
/* 停止定时器自身 */
if (count >= 8)
{
/* 控制定时器然后更改超时时间长度 */
rt_timer_control(timer1, RT_TIMER_CTRL_SET_TIME, (void *)&timeout);
count = 0;
}
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}
void timer_control_init()
{
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/* 创建定时器1 */
timer1 = rt_timer_create("timer1", /* 定时器名字是 timer1 */
timeout1, /* 超时时回调的处理函数 */
RT_NULL, /* 超时函数的入口参数 */
10, /* 定时长度以OS Tick为单位即10个OS Tick */
RT_TIMER_FLAG_PERIODIC); /* 周期性定时器 */
/* 启动定时器 */
if (timer1 != RT_NULL)
rt_timer_start(timer1);
else
tc_stat(TC_STAT_END | TC_STAT_FAILED);
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}
#ifdef RT_USING_TC
static void _tc_cleanup()
{
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/* 调度器上锁,上锁后,将不再切换到其他线程,仅响应中断 */
rt_enter_critical();
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/* 删除定时器对象 */
rt_timer_delete(timer1);
timer1 = RT_NULL;
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/* 调度器解锁 */
rt_exit_critical();
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/* 设置TestCase状态 */
tc_done(TC_STAT_PASSED);
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}
int _tc_timer_control()
{
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/* 设置TestCase清理回调函数 */
tc_cleanup(_tc_cleanup);
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/* 执行定时器例程 */
count = 0;
timer_control_init();
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/* 返回TestCase运行的最长时间 */
return 100;
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}
/* 输出函数命令到finsh shell中 */
FINSH_FUNCTION_EXPORT(_tc_timer_control, a timer control example);
#else
/* 用户应用入口 */
int rt_application_init()
{
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timer_control_init();
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return 0;
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}
#endif