#include?“delay.h“

u32?my_us?=?21;
u32?my_ms?=?21000;

void?Delay_Init（void）
{
	//Systick定時(shí)器初始化?SysTick定時(shí)器時(shí)鐘頻率：168/8?=?21MHZ
	SysTick_CLKSourceConfig（SysTick_CLKSource_HCLK_Div8）;

}


//nus取值范圍：1~798915

void?delay_us（int?nus）
{
	
	u32?temp;
	
	//設(shè)置計(jì)數(shù)器為0
	SysTick->VAL?=?0x00?;
	
	//設(shè)置重裝值寄存器
	SysTick->LOAD?=?my_us*nus?-?1;
	
	
	//啟動(dòng)定時(shí)器?計(jì)數(shù)器開始倒數(shù)
	SysTick->CTRL?|=?（0x01<<0）;
	//SysTick->CTRL

	do
	{
		temp?=?SysTick->CTRL;??//將寄存器的值賦值給temp通過判斷temp的16是否為1
	????????//定時(shí)器是否開的?????????16位是否為1
	}while（?（temp?&?（0x01<<0）?）?&&?!（temp?&?（0x01<<16））?）;

	//關(guān)閉定時(shí)器?
	SysTick->CTRL?&=?~（0x01<<0）;

}


void?delay_ms（int?nms）
{
	
	u32?temp;
	
	//設(shè)置計(jì)數(shù)器為0
	SysTick->VAL?=?0x00?;
	
	//設(shè)置重裝值寄存器
	SysTick->LOAD?=?my_ms*nms?-?1;
	
	
	//啟動(dòng)定時(shí)器?計(jì)數(shù)器開始倒數(shù)
	SysTick->CTRL?|=?（0x01<<0）;
	//SysTick->CTRL

	do
	{
		temp?=?SysTick->CTRL;??//將寄存器的值賦值給temp通過判斷temp的16是否為1
	????????//定時(shí)器是否開的?????????16位是否為1
	}while（?（temp?&?（0x01<<0）?）?&&?!（temp?&?（0x01<<16））?）;

	//關(guān)閉定時(shí)器?
	SysTick->CTRL?&=?~（0x01<<0）;

}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2020-08-03?17:23??智能門鎖\
?????文件?????????339??2020-07-17?15:10??智能門鎖\EventRecorderStub.scvd
?????文件???????85650??2020-08-03?16:34??智能門鎖\JlinkLog.txt
?????文件?????????755??2020-07-13?17:27??智能門鎖\JlinkSettings.ini
?????文件?????????399??2020-07-13?10:36??智能門鎖\keilkilll.bat
?????目錄???????????0??2020-08-03?12:22??智能門鎖\Listings\
?????文件???????82564??2020-08-03?12:22??智能門鎖\Listings\startup_stm32f40_41xxx.lst
?????文件??????200391??2020-08-03?16:33??智能門鎖\Listings\Template.map
?????目錄???????????0??2020-08-03?09:22??智能門鎖\MYCODE\
?????文件???????20702??2020-08-03?09:05??智能門鎖\MYCODE\codetab.h
?????文件????????1186??2020-07-21?11:37??智能門鎖\MYCODE\delay.c
?????文件?????????179??2020-07-30?15:54??智能門鎖\MYCODE\delay.h
?????文件????????3226??2020-07-22?14:15??智能門鎖\MYCODE\dht11.c
?????文件?????????237??2020-07-30?10:45??智能門鎖\MYCODE\dht11.h
?????文件????????2107??2020-07-31?20:07??智能門鎖\MYCODE\exti.c
?????文件?????????111??2020-07-16?14:14??智能門鎖\MYCODE\exti.h
?????文件???????15428??2020-08-02?23:08??智能門鎖\MYCODE\finger.c
?????文件????????1472??2020-08-02?22:12??智能門鎖\MYCODE\finger.h
?????文件????????3733??2020-08-02?18:42??智能門鎖\MYCODE\key.c
?????文件?????????483??2020-08-01?13:52??智能門鎖\MYCODE\key.h
?????文件????????1192??2020-08-03?11:25??智能門鎖\MYCODE\led.c
?????文件?????????213??2020-07-15?14:35??智能門鎖\MYCODE\led.h
?????文件???????12373??2020-08-03?16:59??智能門鎖\MYCODE\main.c
?????文件????????5342??2020-07-31?19:03??智能門鎖\MYCODE\malloc.c
?????文件????????1978??2020-07-31?19:02??智能門鎖\MYCODE\malloc.h
?????文件???????14806??2020-08-03?12:36??智能門鎖\MYCODE\MFRC522.c
?????文件????????6414??2020-08-03?12:36??智能門鎖\MYCODE\MFRC522.h
?????文件???????15656??2020-08-03?12:30??智能門鎖\MYCODE\OLED_I2C.c
?????文件?????????888??2020-07-25?09:29??智能門鎖\MYCODE\OLED_I2C.h
?????文件????????2025??2020-07-21?14:43??智能門鎖\MYCODE\sr04.c
?????文件?????????127??2020-07-30?15:54??智能門鎖\MYCODE\sr04.h
............此處省略97個(gè)文件信息