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当前函数耗时1~3us

This commit is contained in:
大石头 2017-03-16 23:21:46 +08:00
parent da5c2f0d43
commit 50ece19701
1 changed files with 8 additions and 11 deletions
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17
Kernel/Time.cpp
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@ -95,24 +95,21 @@ INROOT void TTime::Delay(int us) const
// 睡眠时间太短 // 睡眠时间太短
if (us <= 0) return; if (us <= 0) return;
/*// 较大的时间，按毫秒休眠 // 当前函数耗时1~3us
if (us > 100) us -= 1;
UInt64 end = Current();
if (us >= 1000) if (us >= 1000)
{ {
Sleep(us / 1000);
us %= 1000;
}
// 睡眠时间太短
if (!us) return;*/
// 无需关闭中断，也能实现延迟
// 拆分毫秒和微秒 // 拆分毫秒和微秒
int ms = us / 1000; int ms = us / 1000;
end += ms;
us %= 1000; us %= 1000;
}
// 微秒转为滴答 // 微秒转为滴答
uint ticks = CurrentTicks() + UsToTicks(us); uint ticks = CurrentTicks() + UsToTicks(us);
UInt64 end = Current() + ms;
// 结束嘀嗒数有可能超过1000 // 结束嘀嗒数有可能超过1000
uint max = UsToTicks(1000 - 1); uint max = UsToTicks(1000 - 1);
if (ticks >= max) if (ticks >= max)