E015.D.011-FXLS90230/Drivers/SYSTEM/delay.c

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#include "delay.h"
#include "sys.h"
#include "main.h"

static uint32_t fac_us = 0;							//us<75><73>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
//hal<61><6C><EFBFBD>ṩ<EFBFBD><E1B9A9>ms<6D><73>ʱ __weak void HAL_Delay(uint32_t Delay)<29><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><C3BB>us<75><73>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>delay_usΪus<75><73>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>

/**
 * @brief	<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ӳٺ<EFBFBD><EFBFBD><EFBFBD>,SYSTICK<EFBFBD><EFBFBD>ʱ<EFBFBD>ӹ̶<EFBFBD>ΪAHBʱ<EFBFBD><EFBFBD>
 *
 * @param   SYSCLK	ϵͳʱ<EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD>  1us<EFBFBD><EFBFBD><EFBFBD><EFBFBD>fac_us<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 *
 * @return  void
 */
void delay_init(uint8_t SYSCLK)
{
    //HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);//SysTickƵ<6B><C6B5>ΪHCLK
    fac_us = SYSCLK;						//<2F><><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD>ʹ<EFBFBD><CAB9>OS,fac_us<75><73><EFBFBD><EFBFBD>Ҫʹ<D2AA><CAB9>

}

/**
 * @brief	<EFBFBD><EFBFBD>ʱ΢<EFBFBD><EFBFBD>(us)<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 *
 * @remark	nus:0~190887435(<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD>2^32/fac_us@fac_us=22.5)
 *
 * @param   nus		<EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>΢<EFBFBD><EFBFBD>
 *
 * @return  void
 */
void delay_us(uint32_t nus)
{
    uint32_t ticks;
    uint32_t told, tnow, tcnt = 0;
    uint32_t reload = SysTick->LOAD;				//LOAD<41><44>ֵ
    ticks = nus * fac_us; 						//<2F><>Ҫ<EFBFBD>Ľ<EFBFBD><C4BD><EFBFBD><EFBFBD><EFBFBD>
    told = SysTick->VAL;        				//<2F>ս<EFBFBD><D5BD><EFBFBD>ʱ<EFBFBD>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD>ֵ

    while(1)
    {
        tnow = SysTick->VAL;

        if(tnow != told)
        {
            if(tnow < told)
				tcnt += told - tnow;	//<2F><><EFBFBD><EFBFBD>ע<EFBFBD><D7A2>һ<EFBFBD><D2BB>SYSTICK<43><4B>һ<EFBFBD><D2BB><EFBFBD>ݼ<EFBFBD><DDBC>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϳ<EFBFBD><CDBF><EFBFBD><EFBFBD><EFBFBD>.
            else 
				tcnt += reload - tnow + told;
			
            told = tnow;
            if(tcnt >= ticks)break;			//ʱ<>䳬<EFBFBD><E4B3AC>/<2F><><EFBFBD><EFBFBD>Ҫ<EFBFBD>ӳٵ<D3B3>ʱ<EFBFBD><CAB1>,<2C><><EFBFBD>˳<EFBFBD>.
        }
    }
}


/**
 * @brief	<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>(ms)<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 *
 * @param   nms		<EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ٺ<EFBFBD><EFBFBD><EFBFBD>
 *
 * @return  void
 */
void delay_ms(uint16_t nms)
{
    uint32_t i;

    for(i = 0; i < nms; i++) delay_us(1000);
}


//RCC_ClocksTypeDef RCC_Clockss;

//void delay_us(uint32_t time)
//{
//  uint16_t i;
//  for (i = 2; i <( time*0.07); i++);
// // for (i = 2; i <( time*0.082); i++);  
//}

//void delay_ms(uint32_t time)
//{
//      uint32_t i,j;
//      for(i = time;i>0;i--)  
//      for(j = 1220;j>0;j--);
//}


// 

////<2F><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>ʱϵͳ<CFB5><CDB3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΪCPUƵ<55><C6B5>
//void DelayInit()
//{
//	RCC_GetClocksFreq(&RCC_Clockss);

////<2F><><EFBFBD><EFBFBD>CYCCNT<4E><54><EFBFBD><EFBFBD>,<2C><><EFBFBD>Ѽ<EFBFBD><D1BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㣬<EFBFBD><E3A3AC><EFBFBD><EFBFBD><EFBFBD>򿪼<EFBFBD><F2BFAABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>cpuʱ<75>ӽ<EFBFBD><D3BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϼ<EFBFBD><CFBC><EFBFBD>
//    DEM_CR         |=  DEM_CR_TRCENA; 
////    DWT_CYCCNT      = 0u;    //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԣ<EFBFBD><D4A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫʹ<D2AA><CAB9>CYCCNTʱע<CAB1>͵<EFBFBD><CDB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><D6B1><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 
//    DWT_CR         |= DWT_CR_CYCCNTENA;
//}


// 

// //<2F><>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA>Ҫ<EFBFBD><D2AA>ʱ<EFBFBD><CAB1>΢<EFBFBD><CEA2><EFBFBD><EFBFBD>

//void Delayus(u32 usec)
//{
//     u32 startts,endts,ts;
//  //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뺯<EFBFBD><EBBAAF>ʱ<EFBFBD>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD>ֵ
//     startts = DWT_CYCCNT;
//     ts =  (usec-5) * (RCC_Clockss.SYSCLK_Frequency /(1000*1000) );        //<2F><><EFBFBD><EFBFBD><EFBFBD>ﵽ<EFBFBD><EFB5BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱֵ<CAB1><D6B5>cpuʱ<75><CAB1><EFBFBD><EFBFBD>,^-^<5E><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD>ȷ<EFBFBD>˴<EFBFBD><CBB4><EFBFBD><EFBFBD>Լ<EFBFBD>ȥ<EFBFBD><C8A5><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
//     endts = startts + ts;           //<2F><><EFBFBD><EFBFBD><EFBFBD>ﵽ<EFBFBD><EFB5BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱʱ<CAB1><CAB1><EFBFBD><EFBFBD>DWT_CYCCNT<4E><54><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>32bit<69><74><EFBFBD>ܱ<EFBFBD><DCB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ2<D6B5><32>32<33>η<EFBFBD>-1<><31><EFBFBD>Զ<EFBFBD><D4B6>ƻض<C6BB><D8B6><EFBFBD><EFBFBD><EFBFBD>λ
//      if(endts > startts)            //<2F>ж<EFBFBD><D0B6>Ƿ<EFBFBD><C7B7><EFBFBD>Խ<EFBFBD><D4BD><EFBFBD><EFBFBD>ֵ<EFBFBD>߽<EFBFBD>
//      {
//          while(DWT_CYCCNT < endts);        //<2F>ȵ<EFBFBD><C8B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱֵ<CAB1><D6B5>cpuʱ<75><CAB1><EFBFBD><EFBFBD>ֵ
//       }
//       else
//      {
//           while(DWT_CYCCNT > endts);       //<2F>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD>32bit<69><74><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5>2<EFBFBD><32>32<33>η<EFBFBD>-1
//           while(DWT_CYCCNT < endts);        //<2F>ȵ<EFBFBD><C8B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱֵ<CAB1><D6B5>cpuʱ<75><CAB1><EFBFBD><EFBFBD>ֵ
//      }

//}