RTC设备的疑问

发布于 2019-07-11 14:03:02 浏览：1505 订阅该版

3 个回答

wyzalpha 2019-07-11

这家伙很懒，什么也没写！

sgeeood 认证专家 2019-07-12

这家伙很懒，什么也没写！

不知道有没有帮助你参考下吧,之前写的驱动

static rt_err_t rtc_control(rt_device_t dev, int cmd, void *arg)
{
    stc_rtc_time_t  stcTime;
    struct tm *p_tm;
    struct tm now;

rt_enter_critical();
    /* converts calendar time time into local time. */
    p_tm = localtime((const time_t *) arg);
    memcpy(&now, p_tm, sizeof(struct tm));
    rt_exit_critical();

switch (cmd)
    {
        case RT_DEVICE_CTRL_RTC_SET_TIME:
        {
            Rtc_DisableFunc(RtcCount);
            stcTime.u8Year =   DEC2BCD(now.tm_year - 100);
            stcTime.u8Month =  DEC2BCD(now.tm_mon + 1);
            stcTime.u8Day =    DEC2BCD(now.tm_mday);
            stcTime.u8Hour =   DEC2BCD(now.tm_hour);
            stcTime.u8Minute = DEC2BCD(now.tm_min);
            stcTime.u8Second = DEC2BCD(now.tm_sec);
            stcTime.u8DayOfWeek = Rtc_CalWeek(&stcTime.u8Day);
            Rtc_WriteDateTime(&stcTime, TRUE, TRUE);
            Rtc_EnableFunc(RtcCount);
            break;
        }
        case RT_DEVICE_CTRL_RTC_GET_TIME:
        {
            Rtc_ReadDateTime(&stcReadTime);

now.tm_year = BCD2DEC(stcReadTime.u8Year) + 100; //rtc -1900 year is 2000+ because +100
            now.tm_mon  = BCD2DEC(stcReadTime.u8Month) - 1; //tm_mon: 0~11
            now.tm_mday = BCD2DEC(stcReadTime.u8Day);
            now.tm_hour = BCD2DEC(stcReadTime.u8Hour);
            now.tm_min  = BCD2DEC(stcReadTime.u8Minute);
            now.tm_sec  = BCD2DEC(stcReadTime.u8Second);

*((time_t *)arg) = mktime(&now);

//rt_kprintf("hg get datetiem!\n");
            break;
        }
        case RT_DEVICE_CTRL_RTC_SET_ALARM:
        {
            break;
        }
        case RT_DEVICE_CTRL_RTC_GET_ALARM:
        {
            break;
        }

}
    return RT_EOK;
}