211 lines
4.0 KiB
C++
211 lines
4.0 KiB
C++
#include "TTime.h"
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#include "Core\Environment.h"
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#if defined(__CC_ARM)
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#include <time.h>
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#else
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#include <ctime>
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#endif
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#define TIME_DEBUG 0
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#define UTC true // utc 从1970/1/1 开始计时
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#define UTC_CALIBRATE 946684800UL // 2000/1/1 - 1970/1/1 秒值
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#ifdef UTC
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#define BASE_YEAR_US 62135596800UL // (63082281600UL-UTC_CALIBRATE) // 从0 到 2000-01-01的所有秒数
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#else
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#define BASE_YEAR_US 63082281600UL // 从0 到 2000-01-01的所有秒数
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#endif
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/************************************************ TTime ************************************************/
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TTime::TTime()
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{
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Seconds = 0;
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//Ticks = 0;
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#if defined(STM32F0) || defined(GD32F150)
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Index = 13;
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#else
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Div = 0;
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if (Sys.FlashSize > 0x80)
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Index = 5;
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else
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Index = 1; // 错开开关的 TIM3 背光
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#endif
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BaseSeconds = 0;
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OnInit = nullptr;
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OnLoad = nullptr;
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OnSave = nullptr;
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OnSleep = nullptr;
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}
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void TTime::SetTime(UInt64 sec)
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{
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if (sec >= BASE_YEAR_US) sec -= BASE_YEAR_US;
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BaseSeconds = (int)(sec - Seconds);
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#if DEBUG
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/*DateTime dt(sec);
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debug_printf("TTime::SetTime 设置时间 ");
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dt.Show(true);*/
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#endif
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// 保存到RTC
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if (OnSave) OnSave();
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}
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// 关键性代码，放到开头
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INROOT void TTime::Sleep(int ms, bool* running) const
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{
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// 睡眠时间太短
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if (ms <= 0) return;
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// 结束时间
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UInt64 end = Current() + ms;
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// 较大的睡眠时间直接让CPU停下来
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if (OnSleep && ms >= 10)
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{
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while (ms >= 10)
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{
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OnSleep(ms);
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// 判断是否需要继续
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if (running != nullptr && !*running) break;
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// 重新计算剩下的时间
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ms = (int)(end - Current());
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}
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}
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// 睡眠时间太短
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if (!ms || (running && !*running)) return;
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// 空转
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while (true)
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{
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if (Current() >= end) break;
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if (running != nullptr && !*running) break;
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}
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}
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INROOT void TTime::Delay(int us) const
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{
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// 睡眠时间太短
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if (us <= 0) return;
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// 当前函数耗时1~3us
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if (us > 100) us -= 1;
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UInt64 end = Current();
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if (us >= 1000)
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{
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// 拆分毫秒和微秒
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int ms = us / 1000;
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end += ms;
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us %= 1000;
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}
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// 微秒转为滴答
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uint ticks = CurrentTicks() + UsToTicks(us);
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// 结束嘀嗒数有可能超过1000
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uint max = UsToTicks(1000 - 1);
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if (ticks >= max)
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{
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end++;
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ticks -= max;
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}
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// 等待目标时间
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while (true)
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{
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// 首先比较毫秒数
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int n = (int)(Current() - end);
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if (n > 0) break;
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if (n == 0 && CurrentTicks() >= ticks) break;
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}
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}
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extern "C"
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{
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#ifndef _MSC_VER
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// 获取系统启动后经过的毫秒数
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clock_t clock(void)
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{
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return Time.Current();
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}
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// 实现C函数库的time函数
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time_t time(time_t* sec)
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{
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uint s = Time.BaseSeconds + Time.Seconds;
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if (sec) *sec = s;
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return s;
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}
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#endif
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}
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/************************************************ TimeWheel ************************************************/
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TimeWheel::TimeWheel(uint ms)
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{
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Sleep = 0;
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Reset(ms);
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}
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void TimeWheel::Reset(uint ms)
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{
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Expire = Time.Current() + ms;
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}
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// 是否已过期
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bool TimeWheel::Expired()
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{
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UInt64 now = Time.Current();
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if (now > Expire) return true;
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// 睡眠，释放CPU
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if (Sleep) Sys.Sleep(Sleep);
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return false;
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}
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/************************************************ TimeCost ************************************************/
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TimeCost::TimeCost()
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{
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Reset();
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}
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void TimeCost::Reset()
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{
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Start = Time.Current();
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StartTicks = Time.CurrentTicks();
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}
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// 逝去的时间，微秒
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int TimeCost::Elapsed() const
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{
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int ts = (int)(Time.CurrentTicks() - StartTicks);
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int ms = (int)(Time.Current() - Start);
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// 有可能滴答部分不是完整的一圈
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if (ts > 0) return ms * 1000 + Time.TicksToUs(ts);
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// 如果毫秒部分也没有，那么可能是微小错误偏差
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if (ms <= 0) return 0;
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// 如果滴答是负数，则干脆减去
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return ms * 1000 - Time.TicksToUs(-ts);
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}
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void TimeCost::Show(cstring format) const
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{
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if (!format) format = "执行 %dus\r\n";
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debug_printf(format, Elapsed());
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}
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