#include?“systick.h“
#include?“public.h“
/*******************************************************************************
*?函?數?名?????????:?delay_us
*?函數功能		???:?延時函數，延時us
*?輸????入?????????:?i
*?輸????出?????????:?無
*******************************************************************************/
void?delay_us（u32?i）
{
	u32?temp;
	SysTick->LOAD=9*i;		?//設置重裝數值?72MHZ時
	SysTick->CTRL=0X01;		?//使能，減到零是無動作，采用外部時鐘源
	SysTick->VAL=0;		???	?//清零計數器
	do
	{
		temp=SysTick->CTRL;		???//讀取當前倒計數值
	}
	while（（temp&0x01）&&（!（temp&（1<<16））））;	?//等待時間到達
	SysTick->CTRL=0;	//關閉計數器
	SysTick->VAL=0;		//清空計數器
}

/*******************************************************************************
*?函?數?名?????????:?delay_ms
*?函數功能		???:?延時函數，延時ms
*?輸????入?????????:?i
*?輸????出?????????:?無
*******************************************************************************/
void?delay_ms（u32?i）
{
	u32?temp;
	SysTick->LOAD=9000*i;	??//設置重裝數值?72MHZ時
	SysTick->CTRL=0X01;		//使能，減到零是無動作，采用外部時鐘源
	SysTick->VAL=0;			//清零計數器
	do
	{
		temp=SysTick->CTRL;	???//讀取當前倒計數值
	}
	while（（temp&0x01）&&（!（temp&（1<<16））））;	//等待時間到達
	SysTick->CTRL=0;	//關閉計數器
	SysTick->VAL=0;		//清空計數器
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-03-08?11:40??usart2_dma\
?????文件???????59715??2014-12-09?16:24??usart2_dma\1.uvopt
?????目錄???????????0??2018-11-22?14:28??usart2_dma\APP\
?????目錄???????????0??2018-11-21?17:31??usart2_dma\APP\SysTick\
?????文件????????1333??2017-12-11?14:52??usart2_dma\APP\SysTick\systick.c
?????文件?????????121??2014-12-09?16:09??usart2_dma\APP\SysTick\systick.h
?????目錄???????????0??2019-03-08?10:31??usart2_dma\APP\usartDMA\
?????文件????????5696??2019-03-08?10:31??usart2_dma\APP\usartDMA\usart_dma.c
?????文件?????????166??2019-03-08?10:29??usart2_dma\APP\usartDMA\usart_dma.h
?????文件?????????497??2015-06-05?10:54??usart2_dma\Jlink?Regs?CM3.txt
?????文件?????????285??2014-12-11?16:01??usart2_dma\JlinkSettings.ini
?????文件?????????399??2011-04-23?10:24??usart2_dma\keilkilll.bat
?????目錄???????????0??2018-11-21?17:31??usart2_dma\Libraries\
?????目錄???????????0??2018-11-21?17:31??usart2_dma\Libraries\CMSIS\
?????目錄???????????0??2018-11-21?17:31??usart2_dma\Libraries\CMSIS\CM3\
?????目錄???????????0??2018-11-21?17:31??usart2_dma\Libraries\CMSIS\CM3\CoreSupport\
?????文件???????17273??2010-06-07?10:25??usart2_dma\Libraries\CMSIS\CM3\CoreSupport\core_cm3.c
?????文件???????85714??2011-02-09?14:59??usart2_dma\Libraries\CMSIS\CM3\CoreSupport\core_cm3.h
?????目錄???????????0??2018-11-21?17:31??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\
?????目錄???????????0??2018-11-21?17:31??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\
?????目錄???????????0??2018-11-21?17:31??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x\
?????文件???????26297??2011-03-14?12:31??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x\Release_Notes.html
?????目錄???????????0??2018-11-21?17:31??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x\startup\
?????目錄???????????0??2018-11-21?17:31??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x\startup\arm\
?????文件???????15766??2011-03-10?10:52??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x\startup\arm\startup_stm32f10x_cl.s
?????文件???????15503??2011-03-10?10:52??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x\startup\arm\startup_stm32f10x_hd.s
?????文件???????15692??2011-03-10?10:52??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x\startup\arm\startup_stm32f10x_hd_vl.s
?????文件???????12376??2011-03-10?10:52??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x\startup\arm\startup_stm32f10x_ld.s
?????文件???????13656??2011-03-10?10:52??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x\startup\arm\startup_stm32f10x_ld_vl.s
?????文件???????12765??2011-03-10?10:52??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x\startup\arm\startup_stm32f10x_md.s
?????文件???????14073??2011-03-10?10:51??usart2_dma\Libraries\CMSIS\CM3\DeviceSupport\ST\STM32F10x\startup\arm\startup_stm32f10x_md_vl.s
............此處省略164個文件信息