RTC_CONTROL
RTC_PRINT(RTC_CONTROL);
RTC_PRINT(RTC_CONTROL);
reg = RTC_CONTROL;
rtc_write(RTC_CONTROL, rtc_read(RTC_CONTROL) & ~RTC_START);
rtc_write(RTC_CONTROL, rtc_read(RTC_CONTROL) | RTC_START);
rtc_write(RTC_CONTROL, rtc_read(RTC_CONTROL) & ~RTC_START);
rtc_write(RTC_CONTROL, rtc_read(RTC_CONTROL) | RTC_START);