关于定时器回调问题。

发布于 2020-01-13 12:26:10 浏览：1056 订阅该版

我设置了一个静态的定时器，定时器周期为200ms，我在定时器回调函数中打印了一个cnt，cnt每进入一次会+1，现在发现，每500ms就会少进来一次。
**static struct rt_timer timer1_hander;
static void time_eff_sure(void *parameter)
{
    static int cnt;
    rt_kprintf("cnt = %d <br>",cnt++);
}

int radar_timer_init(void)
{
    /* 创建定时器1  周期定时器 */
    rt_timer_init(&timer1_hander,
                  "timer1", time_eff_sure,
                  RT_NULL, 200,
                  RT_TIMER_FLAG_PERIODIC | RT_TIMER_FLAG_SOFT_TIMER);
    /* 启动定时器1 */
    rt_timer_start(&timer1_hander);
    return 0;
}**

串口输出数据：
[12:24:21.870] cnt = 2053[12:24:21.870] cnt = 2054[12:24:22.072] cnt = 2055[12:24:22.270] [12:24:22.470] cnt = 2056[12:24:22.470] cnt = 2057[12:24:22.670] cnt = 2058[12:24:22.870] [12:24:23.070] cnt = 2059[12:24:23.070] cnt = 2060[12:24:23.271] cnt = 2061[12:24:23.470] [12:24:23.670] cnt = 2062[12:24:23.670] cnt = 2063[12:24:23.870] cnt = 2064[12:24:24.070] [12:24:24.269] cnt = 2065[12:24:24.269] cnt = 2066[12:24:24.469] cnt = 2067[12:24:24.669] [12:24:24.869] cnt = 2068[12:24:24.869] cnt = 2069[12:24:25.069] cnt = 2070[12:24:25.269] [12:24:25.469] cnt = 2071[12:24:25.469] cnt = 2072[12:24:25.669] cnt = 2073[12:24:25.869] [12:24:26.069] cnt = 2074[12:24:26.069] cnt = 2075[12:24:26.269] cnt = 2076[12:24:26.469] [12:24:26.669] cnt = 2077[12:24:26.669] cnt = 2078[12:24:26.869] cnt = 2079[12:24:27.069] [12:24:27.269] cnt = 2080[12:24:27.269] cnt = 2081[12:24:27.469] cnt = 2082[12:24:27.669] [12:24:27.869] cnt = 2083[12:24:27.869] cnt = 2084[12:24:28.068] cnt = 2085[12:24:28.269] [12:24:28.469] cnt = 2086[12:24:28.469] cnt = 2087[12:24:28.669] cnt = 2088[12:24:28.869]