/**
??******************************************************************************
??*?@file????system_stm32f1xx.c
??*?@author??MCD?Application?Team
??*?@version?V4.2.0
??*?@date????31-March-2017
??*?@brief???CMSIS?Cortex-M3?Device?Peripheral?Access?layer?System?Source?File.
??*?
??*?1.??This?file?provides?two?functions?and?one?global?variable?to?be?called?from?
??*?????user?application:
??*??????-?SystemInit（）:?Setups?the?system?clock?（System?clock?source?PLL?Multiplier
??*??????????????????????factors?AHB/APBx?prescalers?and?Flash?settings）.?
??*??????????????????????This?function?is?called?at?startup?just?after?reset?and?
??*??????????????????????before?branch?to?main?program.?This?call?is?made?inside
??*??????????????????????the?“startup_stm32f1xx_xx.s“?file.
??*
??*??????-?SystemCoreClock?variable:?Contains?the?core?clock?（HCLK）?it?can?be?used
??*??????????????????????????????????by?the?user?application?to?setup?the?SysTick?
??*??????????????????????????????????timer?or?configure?other?parameters.
??*?????????????????????????????????????
??*??????-?SystemCoreClockUpdate（）:?Updates?the?variable?SystemCoreClock?and?must
??*?????????????????????????????????be?called?whenever?the?core?clock?is?changed
??*?????????????????????????????????during?program?execution.
??*
??*?2.?After?each?device?reset?the?HSI?（8?MHz）?is?used?as?system?clock?source.
??*????Then?SystemInit（）?function?is?called?in?“startup_stm32f1xx_xx.s“?file?to
??*????configure?the?system?clock?before?to?branch?to?main?program.
??*
??*?4.?The?default?value?of?HSE?crystal?is?set?to?8?MHz?（or?25?MHz?depending?on
??*????the?product?used）?refer?to?“HSE_VALUE“.?
??*????When?HSE?is?used?as?system?clock?source?directly?or?through?PLL?and?you
??*????are?using?different?crystal?you?have?to?adapt?the?HSE?value?to?your?own
??*????configuration.
??*????????
??******************************************************************************
??*?@attention
??*
??*?
©?COPYRIGHT（c）?2017?STMicroelectronics

??*
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??*?are?permitted?provided?that?the?following?conditions?are?met:
??*???1.?Redistributions?of?source?code?must?retain?the?above?copyright?notice
??*??????this?list?of?conditions?and?the?following?disclaimer.
??*???2.?Redistributions?in?binary?form?must?reproduce?the?above?copyright?notice
??*??????this?list?of?conditions?and?the?following?disclaimer?in?the?documentation
??*??????and/or?other?materials?provided?with?the?distribution.
??*???3.?Neither?the?name?of?STMicroelectronics?nor?the?names?of?its?contributors
??*??????may?be?used?to?endorse?or?promote?products?derived?from?this?software
??*??????without?specific?prior?written?permission.
??*
??*?THIS?SOFTWARE?IS?PROVIDED?BY?THE?COPYRIGHT?HOLDERS?AND?CONTRIBUTORS?“AS?IS“
??*?AND?ANY?EXPRESS?OR?IMPLIED?WARRANTIES?INCLUDING?BUT?NOT?LIMITED?TO?THE
??*?IMPLIED?WARRANTIE

?屬性????????????大小?????日期????時間???名稱
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?????目錄???????????0??2019-05-29?11:23??STM32F103_sim800tcp_basic\
?????文件????????5762??2019-05-20?09:57??STM32F103_sim800tcp_basic\.mxproject
?????目錄???????????0??2019-05-20?09:57??STM32F103_sim800tcp_basic\Drivers\
?????目錄???????????0??2019-05-20?09:57??STM32F103_sim800tcp_basic\Drivers\CMSIS\
?????目錄???????????0??2019-05-20?09:57??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\
?????目錄???????????0??2019-05-20?09:57??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\
?????目錄???????????0??2019-05-20?09:57??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\
?????文件????????5114??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_abs_f32.c
?????文件????????5458??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_abs_q15.c
?????文件????????4431??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_abs_q31.c
?????文件????????5090??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_abs_q7.c
?????文件????????4891??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_add_f32.c
?????文件????????4423??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_add_q15.c
?????文件????????4553??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_add_q31.c
?????文件????????4226??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_add_q7.c
?????文件????????4613??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_dot_prod_f32.c
?????文件????????4912??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_dot_prod_q15.c
?????文件????????5000??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_dot_prod_q31.c
?????文件????????5408??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_dot_prod_q7.c
?????文件????????5582??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_mult_f32.c
?????文件????????5306??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_mult_q15.c
?????文件????????5201??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_mult_q31.c
?????文件????????4530??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_mult_q7.c
?????文件????????4574??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_negate_f32.c
?????文件????????4621??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_negate_q15.c
?????文件????????4178??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_negate_q31.c
?????文件????????4104??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_negate_q7.c
?????文件????????5095??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_offset_f32.c
?????文件????????4534??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_offset_q15.c
?????文件????????4425??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_offset_q31.c
?????文件????????4462??2019-05-16?10:48??STM32F103_sim800tcp_basic\Drivers\CMSIS\DSP_Lib\Source\BasicMathFunctions\arm_offset_q7.c
............此處省略632個文件信息