RTC

关于STM32的RTC设置年份不正确的问题

发布于 2018-04-30 00:38:56 浏览：4195

本人在调试stm32f051发现需要正确设置WeekDay才能显示正确年份。

代码主要从f4xx-hal的rtc驱动修改而来：

static rt_err_t rt_rtc_control(rt_device_t dev, int cmd, void *args)
{
    struct tm *tm_now;
    struct tm now;
    RTC_TimeTypeDef sTime;
    RTC_DateTypeDef sDate;

rt_enter_critical();
    /* converts calendar time time into local time. */
    tm_now = localtime((const time_t *)args);
    /* copy the statically located variable */
    memcpy(&now, tm_now, sizeof(struct tm));
    /* unlock scheduler. */
    rt_exit_critical();

switch (cmd)
    {
    case RT_DEVICE_CTRL_RTC_GET_TIME:
    {

RTC_GetTime(RTC_Format_BIN, &sTime);
        RTC_GetDate(RTC_Format_BIN, &sDate);

now.tm_hour = sTime.RTC_Hours;
        now.tm_min = sTime.RTC_Minutes;
        now.tm_sec = sTime.RTC_Seconds;
        now.tm_year = sDate.RTC_Year + 100;
        now.tm_mon = sDate.RTC_Month - 1;
        now.tm_mday = sDate.RTC_Date;

*((time_t *)args) = mktime(&now);
    }
    break;

case RT_DEVICE_CTRL_RTC_SET_TIME:
    {
        sTime.RTC_Hours = now.tm_hour;
        sTime.RTC_Minutes = now.tm_min;
        sTime.RTC_Seconds = now.tm_sec;

RTC_SetTime(RTC_Format_BIN, &sTime);
        sDate.RTC_Year = now.tm_year - 100;
        sDate.RTC_Month = now.tm_mon + 1;
        sDate.RTC_Date = now.tm_mday;
        //notice weekday!
        sDate.RTC_WeekDay = now.tm_wday + 1;

RTC_SetDate(RTC_Format_BIN, &sDate);
    }
    break;
    }

return RT_EOK;
}