配置SYSCLK分别为8MHz、20MHz、36MHz、48MHz和72MHz，通过配置main.h来选择频率
在文件stm32f10x_conf.h中可改变HSE的时钟值和等待溢出时间
开启时钟安全系统功能CSS，然后HSI为系统时钟。若HSE恢复正常工作，则会继续按照以前的
配置来正常为系统提供时钟
在PA.08引脚上输出HSE时钟，可作HSE校准作用
正常工作时：LED4(PC.03)亮
HSE失效时： LED1(PC.00)亮
HSE从失效到恢复正常时： LED8（PC.07)亮
RCC.zip_3RCcGtA_STM32F103 R_STM32F103 rcc_STM32F407-RCC配置_visual
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2022-09-21
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RCC.zip （92个子文件） 
3：RCC 
Readme.txt 393B library inc 
stm32f10x_spi.h 13KB stm32f10x_crc.h 2KB stm32f10x_tim.h 46KB stm32f10x_usart.h 14KB stm32f10x_dma.h 18KB stm32f10x_fsmc.h 18KB stm32f10x_type.h 3KB stm32f10x_i2c.h 15KB stm32f10x_dac.h 9KB stm32f10x_iwdg.h 3KB stm32f10x_nvic.h 19KB stm32f10x_systick.h 3KB stm32f10x_map.h 489KB stm32f10x_bkp.h 7KB stm32f10x_pwr.h 4KB stm32f10x_dbgmcu.h 3KB stm32f10x_exti.h 6KB stm32f10x_can.h 12KB stm32f10x_adc.h 18KB cortexm3_macro.h 2KB stm32f10x_rcc.h 14KB stm32f10x_rtc.h 4KB stm32f10x_flash.h 14KB stm32f10x_sdio.h 18KB stm32f10x_lib.h 3KB stm32f10x_wwdg.h 3KB stm32f10x_gpio.h 14KB src stm32f10x_adc.c 57KB stm32f10x_fsmc.c 40KB stm32f10x_flash.c 32KB stm32f10x_rcc.c 43KB stm32f10x_wwdg.c 7KB stm32f10x_tim.c 128KB stm32f10x_iwdg.c 6KB stm32f10x_gpio.c 22KB stm32f10x_dbgmcu.c 5KB stm32f10x_pwr.c 11KB stm32f10x_crc.c 5KB stm32f10x_lib.c 9KB stm32f10x_dac.c 17KB stm32f10x_sdio.c 38KB stm32f10x_can.c 31KB stm32f10x_bkp.c 11KB stm32f10x_rtc.c 12KB stm32f10x_systick.c 7KB stm32f10x_usart.c 43KB stm32f10x_i2c.c 47KB stm32f10x_spi.c 34KB stm32f10x_nvic.c 28KB stm32f10x_exti.c 9KB stm32f10x_dma.c 33KB project main.c 12KB stm32f10x_it.c 30KB stm32f10x_conf.h 6KB main.h 867B stm32f10x_it.h 4KB EWARM RCC.dep 9KB lnkarm_flash.xcl 8KB cortexm3_macro.s 10KB RCC.ewp 44KB lnkarm_ram.xcl 7KB RCC.ewd 31KB settings RCC.dni 658B RCC.wsdt 4KB RCC.cspy.bat 2KB RCC.dbgdt 5KB stm32f10x_vector.c 6KB Debug List stm32f10x_vector.lst 11KB main.lst 22KB stm32f10x_it.lst 53KB stm32f10x_nvic.lst 47KB stm32f10x_lib.lst 17KB RCC.map 62KB stm32f10x_gpio.lst 36KB stm32f10x_rcc.lst 67KB stm32f10x_flash.lst 50KB Exe RCC.d79 57KB RCC.elf 12KB RCC.hex 7KB RCC.sim 3KB Obj stm32f10x_nvic.r79 16KB stm32f10x_lib.r79 1KB stm32f10x_rcc.r79 18KB RCC.pbd 699B stm32f10x_flash.r79 3KB cortexm3_macro.r79 2KB main.r79 14KB stm32f10x_vector.r79 8KB stm32f10x_it.r79 17KB stm32f10x_gpio.r79 13KB RCC.eww 157B
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