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在正點原子Mini開發板上實現HCSR04超聲波測距,親測可用

代碼片段和文件信息
/**************************************************************************//**
?*?@file?????core_cm3.c
?*?@brief????CMSIS?Cortex-M3?Core?Peripheral?Access?layer?Source?File
?*?@version??V1.30
?*?@date?????30.?October?2009
?*
?*?@note
?*?Copyright?(C)?2009?ARM?Limited.?All?rights?reserved.
?*
?*?@par
?*?ARM?Limited?(ARM)?is?supplying?this?software?for?use?with?Cortex-M?
?*?processor?based?microcontrollers.??This?file?can?be?freely?distributed?
?*?within?development?tools?that?are?supporting?such?ARM?based?processors.?
?*
?*?@par
?*?THIS?SOFTWARE?IS?PROVIDED?“AS?IS“.??NO?WARRANTIES?WHETHER?EXPRESS?IMPLIED
?*?OR?STATUTORY?INCLUDING?BUT?NOT?LIMITED?TO?IMPLIED?WARRANTIES?OF
?*?MERCHANTABILITY?AND?FITNESS?FOR?A?PARTICULAR?PURPOSE?APPLY?TO?THIS?SOFTWARE.
?*?ARM?SHALL?NOT?IN?ANY?CIRCUMSTANCES?BE?LIABLE?FOR?SPECIAL?INCIDENTAL?OR
?*?CONSEQUENTIAL?DAMAGES?FOR?ANY?REASON?WHATSOEVER.
?*
?******************************************************************************/
#include?
/*?define?compiler?specific?symbols?*/
#if?defined?(?__CC_ARM???)
??#define?__ASM????????????__asm??????????????????????????????????????/*!??#define?__INLINE?????????__inline???????????????????????????????????/*!
#elif?defined?(?__ICCARM__?)
??#define?__ASM???????????__asm???????????????????????????????????????/*!??#define?__INLINE????????inline??????????????????????????????????????/*!
#elif?defined???(??__GNUC__??)
??#define?__ASM????????????__asm??????????????????????????????????????/*!??#define?__INLINE?????????inline?????????????????????????????????????/*!
#elif?defined???(??__TASKING__??)
??#define?__ASM????????????__asm??????????????????????????????????????/*!??#define?__INLINE?????????inline?????????????????????????????????????/*!
#endif
/*?###################??Compiler?specific?Intrinsics??###########################?*/
#if?defined?(?__CC_ARM???)?/*------------------RealView?Compiler?-----------------*/
/*?ARM?armcc?specific?functions?*/
/**
?*?@brief??Return?the?Process?Stack?Pointer
?*
?*?@return?ProcessStackPointer
?*
?*?Return?the?actual?process?stack?pointer
?*/
__ASM?uint32_t?__get_PSP(void)
{
??mrs?r0?psp
??bx?lr
}
/**
?*?@brief??Set?the?Process?Stack?Pointer
?*
?*?@param??topOfProcStack??Process?Stack?Pointer
?*
?*?Assign?the?value?ProcessStackPointer?to?the?MSP?
?*?(process?stack?pointer)?Cortex?processor?register
?*/
__ASM?void?__set_PSP(uint32_t?topOfProcStack)
{
??msr?psp?r0
??bx?lr
}
/**
?*?@brief??Return?the?Main?Stack?Pointer
?*
?*?@return?Main?Stack?Pointer
?*
?*?Return?the?curren
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-04-15?11:01??超聲波測試\
?????目錄???????????0??2019-04-15?11:01??超聲波測試\CORE\
?????文件???????17273??2010-06-07?10:25??超聲波測試\CORE\core_cm3.c
?????文件???????85714??2011-02-09?14:59??超聲波測試\CORE\core_cm3.h
?????文件???????15503??2011-03-10?10:52??超聲波測試\CORE\startup_stm32f10x_hd.s
?????文件???????12765??2011-03-10?10:52??超聲波測試\CORE\startup_stm32f10x_md.s
?????目錄???????????0??2019-04-15?15:11??超聲波測試\HARDWARE\
?????目錄???????????0??2019-04-15?11:01??超聲波測試\HARDWARE\EXTI\
?????文件????????3740??2014-03-24?19:42??超聲波測試\HARDWARE\EXTI\exti.c
?????文件?????????582??2014-03-20?21:48??超聲波測試\HARDWARE\EXTI\exti.h
?????目錄???????????0??2019-04-15?11:01??超聲波測試\HARDWARE\KEY\
?????文件????????1977??2014-03-20?21:59??超聲波測試\HARDWARE\KEY\key.c
?????文件????????1013??2014-03-20?20:30??超聲波測試\HARDWARE\KEY\key.h
?????文件?????????953??2014-03-05?20:27??超聲波測試\HARDWARE\KEY\led.c
?????文件?????????695??2014-03-05?20:27??超聲波測試\HARDWARE\KEY\led.h
?????目錄???????????0??2019-04-15?11:01??超聲波測試\HARDWARE\LED\
?????文件????????1301??2014-03-20?20:15??超聲波測試\HARDWARE\LED\led.c
?????文件?????????640??2014-03-20?20:15??超聲波測試\HARDWARE\LED\led.h
?????目錄???????????0??2019-04-15?11:06??超聲波測試\HARDWARE\TIME\
?????文件????????1059??2019-04-15?11:06??超聲波測試\HARDWARE\TIME\timer.c
?????文件?????????113??2019-04-15?11:06??超聲波測試\HARDWARE\TIME\timer.h
?????目錄???????????0??2019-04-15?15:15??超聲波測試\HARDWARE\US\
?????文件?????????986??2019-04-15?15:13??超聲波測試\HARDWARE\US\timer2.c
?????文件????????2412??2019-04-15?15:20??超聲波測試\HARDWARE\US\us.c
?????文件?????????100??2019-04-15?15:16??超聲波測試\HARDWARE\US\us.h
?????目錄???????????0??2019-04-15?11:05??超聲波測試\HARDWARE\WAVE\
?????文件????????4818??2019-04-15?15:59??超聲波測試\HARDWARE\WAVE\wave.c
?????文件??????????99??2019-04-15?15:38??超聲波測試\HARDWARE\WAVE\wave.h
?????目錄???????????0??2019-04-15?11:01??超聲波測試\HARDWARE\WDG\
?????文件????????1978??2012-03-07?01:31??超聲波測試\HARDWARE\WDG\wdg.c
?????文件?????????703??2011-11-13?03:03??超聲波測試\HARDWARE\WDG\wdg.h
............此處省略147個文件信息
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