323 lines
8.8 KiB
C++
323 lines
8.8 KiB
C++
#include "Time.h"
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#define TIME_Completion_IdleValue 0xFFFFFFFFFFFFFFFFull
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#define SYSTICK_MAXCOUNT SysTick_LOAD_RELOAD_Msk //((1<<24) - 1) /* SysTick MaxCount */
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#define SYSTICK_ENABLE SysTick_CTRL_ENABLE_Msk // 0 /* Config-Bit to start or stop the SysTick Timer */
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TTime::TTime()
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{
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Ticks = 0;
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//NextEvent = TIME_Completion_IdleValue;
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Microseconds = 0;
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_usTicks = 0;
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Milliseconds = 0;
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_msUs = 0;
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InterruptsPerSecond = 100;
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}
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TTime::~TTime()
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{
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Interrupt.Deactivate(SysTick_IRQn);
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// 关闭定时器
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SysTick->CTRL &= ~SYSTICK_ENABLE;
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}
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void TTime::Init()
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{
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//RCC_ClocksTypeDef clock;
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//RCC_GetClocksFreq(&clock); // 获得系统时钟频率。
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// 准备使用外部时钟，Systick时钟=HCLK/8
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uint clk = Sys.Clock / 8;
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// 48M时，每秒48M/8=6M个滴答，1us=6滴答
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// 72M时，每秒72M/8=9M个滴答，1us=9滴答
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// 96M时，每秒96M/8=12M个滴答，1us=12滴答
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// 120M时，每秒120M/8=15M个滴答，1us=15滴答
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// 168M时，每秒168M/8=21M个滴答，1us=21滴答
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//TicksPerSecond = Sys.Clock / 8; // 每秒的嘀嗒数
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//TicksPerMillisecond = TicksPerSecond / 1000; // 每毫秒的嘀嗒数
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TicksPerMicrosecond = clk / 1000000; // 每微秒的时钟滴答数
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/*SysTick->CTRL &= ~SysTick_CTRL_CLKSOURCE_Msk; // 选择外部时钟，每秒有个HCLK/8滴答
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SysTick->CTRL |= SysTick_CTRL_TICKINT_Msk; // 开启定时器减到0后的中断请求
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// 加载嘀嗒数，72M时~=0x00FFFFFF/9M=1864135us，96M时~=0x00FFFFFF/12M=1398101us
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SysTick->LOAD = SYSTICK_MAXCOUNT - 1;
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SysTick->VAL = 0;
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SysTick->CTRL |= SYSTICK_ENABLE; // SysTick使能*/
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// InterruptsPerSecond单位：中断每秒，clk单位：滴答每秒，ticks单位：滴答每中断
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// 默认100，也即是每秒100次中断，10ms一次
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uint ticks = clk / InterruptsPerSecond;
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// ticks为每次中断的嘀嗒数，也就是重载值
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assert_param(ticks > 0 && ticks < SYSTICK_MAXCOUNT);
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SysTick_Config(ticks);
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// 必须放在SysTick_Config后面，因为它设为不除以8
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//SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);
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// 本身主频已经非常快，除以8分频吧
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SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);
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// 需要最高优先级
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Interrupt.SetPriority(SysTick_IRQn, 0);
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Interrupt.Activate(SysTick_IRQn, OnHandler, this);
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}
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#if defined(STM32F0) || defined(STM32F4)
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#define SysTick_CTRL_COUNTFLAG SysTick_CTRL_COUNTFLAG_Msk
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#endif
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void TTime::OnHandler(ushort num, void* param)
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{
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SmartIRQ irq;
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//uint value = (SysTick->LOAD - SysTick->VAL);
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//SysTick->VAL = 0;
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// 此时若修改寄存器VAL，将会影响SysTick_CTRL_COUNTFLAG标识位
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// 累加计数
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if(SysTick->CTRL & SysTick_CTRL_COUNTFLAG)
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{
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uint value = SysTick->LOAD + 1;
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Time.Ticks += value;
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Time._usTicks += value;
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uint us = Time._usTicks / Time.TicksPerMicrosecond;
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Time.Microseconds += us;
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Time._usTicks %= Time.TicksPerMicrosecond;
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Time._msUs += us;
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Time.Milliseconds += Time._msUs / 1000;
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Time._msUs %= 1000;
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if(Sys.OnTick) Sys.OnTick();
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}
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}
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/*void TTime::SetCompare(ulong compareValue)
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{
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SmartIRQ irq;
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NextEvent = compareValue;
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ulong curTicks = CurrentTicks();
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uint diff;
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// 如果已经超过计划比较值，那么安排最小滴答，准备马上中断
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if(curTicks >= NextEvent)
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diff = 1;
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// 计算下一次中断的间隔，最大为SYSTICK_MAXCOUNT
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else if((compareValue - curTicks) > SYSTICK_MAXCOUNT)
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diff = SYSTICK_MAXCOUNT;
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else
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diff = (uint)(compareValue - curTicks);
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// 把时钟里面的剩余量累加到g_Ticks
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Ticks = CurrentTicks();
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// 重新设定重载值，下一次将在该值处中断
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SysTick->LOAD = diff;
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SysTick->VAL = 0x00;
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}*/
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ulong TTime::CurrentTicks()
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{
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//SmartIRQ irq;
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uint value = (SysTick->LOAD - SysTick->VAL);
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return Ticks + value;
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}
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// 当前微秒数
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ulong TTime::Current()
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{
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uint value = (SysTick->LOAD - SysTick->VAL);
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return Microseconds + value / TicksPerMicrosecond;
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}
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void TTime::SetTime(ulong us)
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{
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SmartIRQ irq;
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SysTick->VAL = 0;
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SysTick->CTRL &= ~SysTick_CTRL_COUNTFLAG;
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Ticks = us * TicksPerMicrosecond;
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// 修改系统启动时间
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Sys.StartTime += us - Microseconds;
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Microseconds = us;
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_usTicks = 0;
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Milliseconds = us / 1000;
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_msUs = us % 1000;
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}
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#define STM32_SLEEP_USEC_FIXED_OVERHEAD_CLOCKS 3
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void TTime::Sleep(uint us)
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{
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// 睡眠时间太短
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if(us <= STM32_SLEEP_USEC_FIXED_OVERHEAD_CLOCKS) return ;
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// 自己关闭中断，简直实在找死！
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// Sleep的时候，尽量保持中断打开，否则g_Ticks无法累加，从而造成死循环
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// 记录现在的中断状态
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SmartIRQ irq(true);
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// 时钟滴答需要采用UINT64
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ulong maxDiff = (ulong)us * TicksPerMicrosecond;
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ulong current = CurrentTicks();
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//ulong maxDiff = (ulong)us;
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//ulong current = Current();
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// 减去误差指令周期，在获取当前时间以后多了几个指令
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if(maxDiff <= STM32_SLEEP_USEC_FIXED_OVERHEAD_CLOCKS)
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maxDiff = 0;
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else
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maxDiff -= STM32_SLEEP_USEC_FIXED_OVERHEAD_CLOCKS;
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maxDiff += current;
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while(CurrentTicks() <= maxDiff);
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//while(Current() <= maxDiff);
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}
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/// 我们的时间起点是 1/1/2000 00:00:00.000.000 在公历里面1/1/2000是星期六
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#define BASE_YEAR 2000
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#define BASE_YEAR_LEAPYEAR_ADJUST 484
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#define BASE_YEAR_DAYOFWEEK_SHIFT 6 // 星期偏移
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const int CummulativeDaysForMonth[13] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365};
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#define IS_LEAP_YEAR(y) (((y % 4 == 0) && (y % 100 != 0)) || (y % 400 == 0))
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#define NUMBER_OF_LEAP_YEARS(y) ((((y - 1) / 4) - ((y - 1) / 100) + ((y - 1) / 400)) - BASE_YEAR_LEAPYEAR_ADJUST) // 基于基本年1601的闰年数，不包含当年
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#define NUMBER_OF_YEARS(y) (y - BASE_YEAR)
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#define YEARS_TO_DAYS(y) ((NUMBER_OF_YEARS(y) * 365) + NUMBER_OF_LEAP_YEARS(y))
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#define MONTH_TO_DAYS(y, m) (CummulativeDaysForMonth[m - 1] + ((IS_LEAP_YEAR(y) && (m > 2)) ? 1 : 0))
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SystemTime& SystemTime::Parse(ulong us)
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{
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SystemTime& st = *this;
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// 分别计算毫秒、秒、分、时，剩下天数
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uint time = us % 60000000; // 此时会削去高位，ulong=>uint
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st.Microsecond = time % 1000;
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time /= 1000;
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st.Millisecond = time % 1000;
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time /= 1000;
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st.Second = time % 60;
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//time /= 60;
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time = us / 60000000; // 用一次大整数除法，重新计算高位
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st.Minute = time % 60;
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time /= 60;
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st.Hour = time % 24;
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time /= 24;
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// 基本年的一天不一定是星期天，需要偏移BASE_YEAR_DAYOFWEEK_SHIFT
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st.DayOfWeek = (time + BASE_YEAR_DAYOFWEEK_SHIFT) % 7;
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st.Year = (ushort)(time / 365 + BASE_YEAR);
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// 按最小每年365天估算，如果不满当天总天数，年份减一
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int ytd = YEARS_TO_DAYS(st.Year);
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if (ytd > time)
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{
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st.Year--;
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ytd = YEARS_TO_DAYS(st.Year);
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}
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// 减去年份的天数
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time -= ytd;
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// 按最大每月31天估算，如果超过当月总天数，月份加一
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st.Month = (ushort)(time / 31 + 1);
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int mtd = MONTH_TO_DAYS(st.Year, st.Month + 1);
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if (time >= mtd) st.Month++;
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// 计算月份表示的天数
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mtd = MONTH_TO_DAYS(st.Year, st.Month);
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// 今年总天数减去月份天数，得到该月第几天
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st.Day = (ushort)(time - mtd + 1);
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return st;
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}
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uint SystemTime::TotalSeconds()
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{
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uint s = 0;
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s += YEARS_TO_DAYS(Year) + MONTH_TO_DAYS(Year, Month) + Day - 1;
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s = s * 24 + Hour;
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s = s * 60 + Minute;
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s = s * 60 + Second;
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return s;
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}
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ulong SystemTime::TotalMicroseconds()
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{
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ulong us = (ulong)TotalSeconds();
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us = us * 1000 + Millisecond;
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us = us * 1000 + Microsecond;
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return us;
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}
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// 默认格式化时间为yyyy-MM-dd HH:mm:ss
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/*
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d短日期 M/d/yy
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D长日期 yyyy-MM-dd
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t短时间 mm:ss
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T长时间 HH:mm:ss
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f短全部 M/d/yy HH:mm
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F长全部 yyyy-MM-dd HH:mm:ss
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*/
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const char* SystemTime::ToString(byte kind, string str)
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{
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//assert_param(str);
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if(!str) str = _Str;
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const SystemTime& st = *this;
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switch(kind)
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{
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case 'd':
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sprintf(str, "%d/%d/%02d", st.Month, st.Day, st.Year % 100);
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break;
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case 'D':
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sprintf(str, "%04d-%02d-%02d", st.Year, st.Month, st.Day);
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break;
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case 't':
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sprintf(str, "%02d:%02d", st.Hour, st.Minute);
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break;
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case 'T':
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sprintf(str, "%02d:%02d:%02d", st.Hour, st.Minute, st.Second);
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break;
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case 'f':
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sprintf(str, "%d/%d/%02d %02d:%02d", st.Month, st.Day, st.Year % 100, st.Hour, st.Minute);
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break;
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case 'F':
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sprintf(str, "%04d-%02d-%02d %02d:%02d:%02d", st.Year, st.Month, st.Day, st.Hour, st.Minute, st.Second);
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break;
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default:
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assert_param(false);
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break;
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}
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return str;
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}
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// 当前时间
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SystemTime& TTime::Now()
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{
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_Now.Parse(Current());
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return _Now;
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}
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