C语言 日历转成utc时间戳

//=================================================================================================
const uint16_t Tab_MonthRelativeDay[12] = {0,31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
//=================================================================================================
uint32_t get_TimeStamp(uint32_t year, uint8_t mon, uint8_t day, uint8_t hour, uint8_t min, uint8_t sec)
{
uint8_t time_year = year-30;
uint32_t tm_T = time_year365; //Year
for(uint8_t i=0; i<time_year; i++)
{
if(i%4 == 0)
tm_T += 1;
}
tm_T += Tab_MonthRelativeDay[mon-1];
if((time_year%4==0) && (mon>2))
tm_T += 1;
tm_T += (day-1);
tm_T = (243600);
tm_T += ((hour60)+min) * 60 + sec;
tm_T += 946656000;//2000-01-01 00:00:00
//printf(“tm_T:%d\n”,tm_T);

//    printf("time1:  %d.%02d.%02d   %02d:%02d:%02d \n", (rtc_0.tm_year+1970), rtc_0.tm_mon, rtc_0.tm_mday,
//    rtc_0.tm_hour, rtc_0.tm_min, rtc_0.tm_sec);

return tm_T;

//return RTCCNT-28800; //-8h

}