STM32 延時函數(shù)封裝

/*---------------------------------

延時模塊函數(shù)

說明：只需在工程中加入delay.c和delay.h

文件，即可用 Delayms(__IO uint32_t nTime);

Delayus(__IO uint32_t nTime)

-----------------------------------*/

#ifndef __DELAY_H

#define __DELAY_H

#include "stm32f10x.h"

/*---------------------------------

描 述：參數(shù)1即為1ms，1000即為1s;只有幾

us的誤差;

-----------------------------------*/

extern void Delayms(__IO uint32_t nTime);

/*---------------------------------

描 述：參數(shù)1即為1us，1000即為1ms;只有幾

us的誤差;

-----------------------------------*/

extern void Delayus(__IO uint32_t nTime);

/*---------------------------------

函數(shù)名：延時調(diào)整形式的delaynus函數(shù),

描 述：參數(shù)1即為1us，1000即為1ms;

-----------------------------------*/

extern void delay_nus(unsigned long n);

/*---------------------------------

函數(shù)名：延時調(diào)整形式的delaynms函數(shù),

描 述：參數(shù)1即為1ms，1000即為1s;

-----------------------------------*/

extern void delay_nms(unsigned long n);

#endif

C 函數(shù)

/*---------------------------------

延時模塊函數(shù)

說明：只需在工程中加入delay.c和delay.h

文件，即可用 Delayms(__IO uint32_t nTime);

Delayus(__IO uint32_t nTime)

-----------------------------------*/

#include"delay.h"

static __IO uint32_t TimingDelay;

/* Private function prototypes -----------------------------------------------*/

/*---------------------------------

函數(shù)名：ms延時函數(shù)

描 述：參數(shù)1即為1ms，1000即為1s;只有幾

us的誤差;

-----------------------------------*/

void Delayms(__IO uint32_t nTime)

{

while(SysTick_Config(SystemCoreClock/1000));

TimingDelay = nTime;

while(TimingDelay != 0);

SysTick->CTRL=0x00; //關(guān)閉計數(shù)器

SysTick->VAL =0X00; //清空計數(shù)器

}

/*---------------------------------

函數(shù)名：us延時函數(shù)

描 述：參數(shù)1即為1us，1000即為1ms;只有幾

us的誤差;

-----------------------------------*/

void Delayus(__IO uint32_t nTime)

{

while(SysTick_Config(SystemCoreClock/1000000));

TimingDelay = nTime;

while(TimingDelay != 0);

SysTick->CTRL=0x00; //關(guān)閉計數(shù)器

SysTick->VAL =0X00; //清空計數(shù)器

}

/*---------------------------------

函數(shù)名：延時輔助函數(shù)

描 述：

-----------------------------------*/

void TimingDelay_Decrement(void)

{

if (TimingDelay != 0x00)

{

TimingDelay--;

}

}

/*---------------------------------

函數(shù)名：systick的中斷函數(shù)

描 述：參數(shù)1即為1us，1000即為1ms;只有幾

us的誤差;

-----------------------------------*/

void SysTick_Handler(void)

{

TimingDelay_Decrement();

}

/*---------------------------------

函數(shù)名：延時調(diào)整形式的delaynus函數(shù),

描 述：參數(shù)1即為1us，1000即為1ms;

-----------------------------------*/

void delay_nus(unsigned long n)

{

unsigned long j;

while(n--)

{

j=12;

while(j--);

}

}

/*---------------------------------

函數(shù)名：延時調(diào)整形式的delaynms函數(shù),

描 述：參數(shù)1即為1ms，1000即為1s;

-----------------------------------*/

void delay_nms(unsigned long n)

{

while(n--)

delay_nus(1030);

}