OSTimeDlyHMSM函数中的时分秒，ms转换为ticks的问题

caokangchun · 发表于 2017-8-25 10:41:30

INT8U  OSTimeDlyHMSM (INT8U hours, INT8U minutes,INT8U seconds, INT16U  ms)
{
   .......................
   .......................

ticks = ((INT32U)hours * 3600uL + (INT32U)minutes * 60uL + (INT32U)seconds) * OS_TICKS_PER_SEC
      + OS_TICKS_PER_SEC * ((INT32U)ms + 500uL / OS_TICKS_PER_SEC) / 1000uL;
   .......................
}
就是红色字这里，加上是有什么意义呢？如果ms=500  ,    200*(500+500/200)/1000  = 200*(500+2)/1000