[RTT routine exercises] 4.4 Timer control

The timer can pass throughrt_timer_control() To change some features of the timer, such as the timer time.

Here, the scheduled cycle starts from 100 and is used in the program

rt_tick_get()-tick

To check whether the scheduled cycle is as scheduled. After 8 times, usert_timer_control(), Change the scheduled period to 3000. The actual effect can be verified by printed tick information and intuitive feelings.

Program:

#include <rtthread.h>static rt_timer_t timer1;//static rt_timer_t timer2;static rt_uint8_t count;static rt_tick_t tick;static void timeout1(void* parameter){    rt_tick_t timeout = 3000;    rt_kprintf("periodic timer is timeout\n");        rt_kprintf("the time set is %d\n", (rt_tick_get()-tick));    tick = rt_tick_get();    count ++;       if (count >= 8)    {        rt_timer_control(timer1, RT_TIMER_CTRL_SET_ONESHOT, (void *)&timeout);            rt_timer_control(timer1, RT_TIMER_CTRL_SET_TIME, (void *)&timeout);        count = 0;    }}int rt_application_init(){    timer1 = rt_timer_create("timer1",        timeout1,        RT_NULL,        100,        RT_TIMER_FLAG_PERIODIC);        if (timer1 != RT_NULL)        rt_timer_start(timer1);      return 0;}

Result:

periodic timer is timeoutthe time set is 100periodic timer is timeoutthe time set is 100periodic timer is timeoutthe time set is 100periodic timer is timeoutthe time set is 100periodic timer is timeoutthe time set is 100periodic timer is timeoutthe time set is 100periodic timer is timeoutthe time set is 100periodic timer is timeoutthe time set is 100periodic timer is timeoutthe time set is 3000periodic timer is timeoutthe time set is 3000periodic timer is timeoutthe time set is 3000periodic timer is timeoutthe time set is 3000