135 lines
3.7 KiB
C++
135 lines
3.7 KiB
C++
#include "TTime.h"
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#include "Timer.h"
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#include "Platform\stm32.h"
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#define TIME_DEBUG 0
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/************************************************ TTime ************************************************/
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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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static TIM_TypeDef* const g_Timers[] = TIMS;
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void TTime::Init()
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{
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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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Ticks = clk / 1000000; // 每微秒的时钟滴答数
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//uint ticks = SYSTICK_MAXCOUNT;
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// ticks为每次中断的嘀嗒数，也就是重载值
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//SysTick_Config(ticks);
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// 上面的函数会打开中断
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uint ticks = Ticks * 1000; // 1000微秒，便于跟毫秒叠加
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SysTick->LOAD = ticks - 1;
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SysTick->VAL = 0;
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SysTick->CTRL = SysTick_CTRL_ENABLE_Msk;
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//Interrupt.Disable(SysTick_IRQn);
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TIM_TypeDef* tim = g_Timers[Index];
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/*#if defined(STM32F0) || defined(GD32F150)
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14, ENABLE);
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#else
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);
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#endif*/
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Timer::ClockCmd(Index, true);
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// 获取当前频率
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#if defined(STM32F0) || defined(GD32F150)
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uint prd = 1000;
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uint psc = Sys.Clock / 1000;
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#else
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clk = RCC_GetPCLK();
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if((uint)tim & 0x00010000) clk = RCC_GetPCLK2();
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clk <<= 1;
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// 120M时，分频系数必须是120K才能得到1k的时钟，超过了最大值64k
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// 因此，需要增加系数
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uint prd = 1000;
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uint psc = clk / 1000;
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Div = 0;
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while(psc > 0xFFFF)
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{
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prd <<= 1;
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psc >>= 1;
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Div++;
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}
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#endif
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// 配置时钟。1毫秒计时，1000毫秒中断
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TIM_TimeBaseInitTypeDef tr;
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TIM_TimeBaseStructInit(&tr);
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tr.TIM_Period = prd - 1;
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tr.TIM_Prescaler = psc - 1;
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//tr.TIM_ClockDivision = 0x0;
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tr.TIM_CounterMode = TIM_CounterMode_Up;
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TIM_TimeBaseInit(tim, &tr);
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// 打开中断
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TIM_ITConfig(tim, TIM_IT_Update, ENABLE);
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// 清除标志位 必须要有！！ 否则 开启中断立马中断给你看
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TIM_ClearFlag(tim, TIM_FLAG_Update);
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const byte irqs[] = TIM_IRQns;
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byte irq = irqs[Index];
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Interrupt.SetPriority(irq, 0);
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Interrupt.Activate(irq, OnHandler, tim);
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// 打开计数
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TIM_Cmd(tim, ENABLE);
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}
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#if !defined(TINY) && defined(STM32F0)
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#pragma arm section code = "SectionForSys"
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#endif
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#if defined(STM32F0) || defined(GD32F150) || 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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auto timer = (TIM_TypeDef*)param;
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if(!timer) return;
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// 检查指定的 TIM 中断发生
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if(TIM_GetITStatus(timer, TIM_IT_Update) == RESET) return;
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// 累加计数
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auto& time = (TTime&)Time;
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time.Seconds += 1;
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time.Milliseconds += 1000;
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// 必须清除TIMx的中断待处理位，否则会频繁中断
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TIM_ClearITPendingBit(timer, TIM_IT_Update);
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//debug_printf("TTime::OnHandler Seconds=%d Milliseconds=%d\r\n", Time.Seconds, (uint)Time.Milliseconds);
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// 定期保存Ticks到后备RTC寄存器
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if(time.OnSave) time.OnSave();
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//if(Sys.OnTick) Sys.OnTick();
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}
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// 当前滴答时钟
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uint TTime::CurrentTicks() const
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{
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return SysTick->LOAD - SysTick->VAL;
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}
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// 当前毫秒数
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UInt64 TTime::Current() const
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{
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uint cnt = g_Timers[Index]->CNT;
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#if ! (defined(STM32F0) || defined(GD32F150))
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if(Div) cnt >>= Div;
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#endif
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return Milliseconds + cnt;
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}
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#pragma arm section code
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