RTC 时区

RTC闹钟设置与本地之间差8小时

发布于 2022-04-24 16:15:43 浏览：1960 订阅该版

lchnu 2022-04-24

Witness, Understand, Skill

crystal266 2022-04-24

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crystal266 2022-06-08

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lchnu 2022-06-09

Witness, Understand, Skill

crystal266 2022-06-09

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4 个回答

crystal266 2022-04-24

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lchnu 2022-04-24

Witness, Understand, Skill

crystal266 2022-04-24

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crystal266 2022-04-24

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lchnu 2022-04-24

Witness, Understand, Skill

lchnu 2022-04-24

Witness, Understand, Skill

@crystal266

localtime_r返回的数据中，month是0 ~ 11, 所以打印时要+1, 年份要加1900。我刚刚也懵圈半天，你的结果是没有问题的，你这个大佬也掉坑里面去了，哈哈哈。

![image.png](https://oss-club.rt-thread.org/uploads/20220424/cb731434c6330ef8a6dabc4325b29e7a.png)

我的测试代码如下，就是对着你发布的图敲进去的。

```c
#include "time.h"
#include "drivers/alarm.h"

void user_alarm_callback(rt_alarm_t alarm, time_t timestamp)
{
    LOG_D("HAHA!");
}

int set_alarm(int argc, char *argv[])
{
    time_t curr_time;
    struct tm p_tm;
    struct rt_alarm_setup setup;
    rt_alarm_t alarm;
    set_date(2022, 04, 24);
    set_time(13, 15, 12);
    curr_time = time(NULL) + 5;
    localtime_r(&curr_time, &p_tm);
    LOG_D("now time: %04d-%02d-%02d %02d:%02d:%02d", p_tm.tm_year,
            p_tm.tm_mon, p_tm.tm_mday, p_tm.tm_hour,p_tm.tm_min,p_tm.tm_sec);

setup.flag = RT_ALARM_SECOND;
    setup.wktime.tm_year = p_tm.tm_year;
    setup.wktime.tm_mon = p_tm.tm_mon;
    setup.wktime.tm_mday = p_tm.tm_mday;
    setup.wktime.tm_wday = p_tm.tm_wday;
    setup.wktime.tm_hour = p_tm.tm_hour;
    setup.wktime.tm_min = p_tm.tm_min;
    setup.wktime.tm_sec = p_tm.tm_sec;

alarm = rt_alarm_create(RT_NULL, &setup);

if (RT_NULL != alarm)
    {
        rt_alarm_start(alarm);
    }
    else
    {
        LOG_E("rtc alarm create failed");
    }
}
MSH_CMD_EXPORT(set_alarm, set_alarm)
```

把`rt_alarm_create`的回调函数设置为`user_alarm_callback`， 也能看到HAHA的log。

![image.png](https://oss-club.rt-thread.org/uploads/20220424/c7e33aa366d25f842c7d9419523c95e5.png)

想不到，咱俩回调函数起的名字都是一样的，我测试玩儿的时候写的函数名是`HAHA`。