FM3130_RTC_DAY
t->tm_wday = bcd2bin(fm3130->regs[FM3130_RTC_DAY] & 0x07) - 1;
buf[FM3130_RTC_DAY] = bin2bcd(t->tm_wday + 1);
tmp = bcd2bin(fm3130->regs[FM3130_RTC_DAY] & 0x7);