#include?“SysTick.h“

static?u8??fac_us=0;												//us延時(shí)倍乘數(shù)			???
		???
/*-?滴答定時(shí)器初始化?-*/
void?SysTick_init（u8?SYSCLK）
{
?	SysTick_CLKSourceConfig（SysTick_CLKSource_HCLK_Div8）;?
	fac_us=SYSCLK/8;??
}								????
/*-?微秒延時(shí)?-*/
void?delay_us（u32?nus）
{		
	u32?temp;	????	?
	SysTick->LOAD=nus*fac_us;?								//時(shí)間加載	??		?
	SysTick->VAL=0x00;????????								//清空計(jì)數(shù)器
	SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk?;?	//開(kāi)始倒數(shù)?	?
	do
	{
		temp=SysTick->CTRL;
	}while（（temp&0x01）&&!（temp&（1<<16）））;			//等待時(shí)間到達(dá)???
	SysTick->CTRL&=~SysTick_CTRL_ENABLE_Msk;?	//關(guān)閉計(jì)數(shù)器
	SysTick->VAL?=0X00;???????								//清空計(jì)數(shù)器?
}
/*-毫秒延時(shí)?-*/
void?delay_ms（u16?nms）
{
	u32?i;
	for（i=0;i}

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----

?????文件??????????4??2016-07-20?12:32??UART4\Doc\讀我.txt

?????文件????????452??2016-08-28?17:21??UART4\HARDWARE\LED.C

?????文件?????????95??2016-07-20?12:21??UART4\HARDWARE\LED.h

?????文件????????759??2016-08-28?16:15??UART4\HARDWARE\SysTick.c

?????文件????????220??2016-07-20?13:11??UART4\HARDWARE\SysTick.h

?????文件???????2356??2016-08-29?14:14??UART4\HARDWARE\usart.c

?????文件????????188??2016-08-29?14:04??UART4\HARDWARE\usart.h

?????文件????????399??2015-07-04?15:01??UART4\keilkill.bat

?????文件?????884127??2015-10-22?23:19??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Include\stm32f4xx.h

?????文件???????2234??2015-10-21?00:41??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Include\system_stm32f4xx.h

?????文件??????43833??2015-10-23?17:45??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Release_Notes.html

?????文件??????25816??2015-05-18?22:16??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f401xx.s

?????文件??????29693??2015-05-18?22:16??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f40xx.s

?????文件??????29604??2015-05-18?22:16??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f40_41xxx.s

?????文件??????19188??2015-10-21?01:02??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f410xx.s

?????文件??????26516??2015-05-18?22:16??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f411xe.s

?????文件??????31053??2015-05-18?22:16??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f427x.s

?????文件??????30978??2015-05-18?22:16??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f427_437xx.s

?????文件??????32301??2015-10-20?17:39??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f429_439xx.s

?????文件??????31403??2015-05-18?22:16??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f446xx.s

?????文件??????30928??2015-10-21?01:02??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\arm\startup_stm32f469_479xx.s

?????文件??????20645??2015-10-21?01:03??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\gcc_ride7\startup_stm32f401xx.s

?????文件??????24091??2015-10-21?01:03??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\gcc_ride7\startup_stm32f40xx.s

?????文件??????24192??2015-10-21?01:03??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\gcc_ride7\startup_stm32f40_41xxx.s

?????文件??????25816??2015-10-21?01:03??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\gcc_ride7\startup_stm32f427x.s

?????文件??????25733??2015-10-21?01:03??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\gcc_ride7\startup_stm32f427_437xx.s

?????文件??????25733??2015-10-21?01:03??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\gcc_ride7\startup_stm32f429_439xx.s

?????文件??????21525??2015-10-21?01:02??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\iar\startup_stm32f401xx.s

?????文件??????25430??2015-10-21?01:02??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\iar\startup_stm32f40xx.s

?????文件??????25342??2015-10-21?01:02??UART4\Libraries\CMSIS\Device\ST\STM32F4xx\Source\Templates\iar\startup_stm32f40_41xxx.s

............此處省略148個(gè)文件信息