Description: SysTick (System Timer): SysTick timer is tied up in the NVIC, used to generate a SysTick exception (exception number: 15). In the past, the operating system and all systems using the time base must have a hardware timer to produce the desired " tick" interrupt, as the time base for the entire system. Tick interrupt the operating system is particularly important. For example, the operating system can assign multiple tasks for a different number of time slices, to ensure that no one task can occupy the system or a time range for each timer cycle given specific tasks, various timing functions provided by the operating system are related to this ticking timer. Therefore, you need a timer to generate periodic interrupts, and preferably also allows users to freely access the program can not register it, in order to maintain the operating system " heartbeat" of the rhythm.
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7、SysTick（系统定时器）\Doc\readme.txt
........................\keilkill.bat
........................\Libraries\CMSIS\core_cm3.c
........................\.........\.....\core_cm3.h
........................\.........\.....\startup\startup_stm32f10x_cl.s
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........................\.........\.....\stm32f10x.h
........................\.........\.....\system_stm32f10x.c
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........................\.........\FWlib\inc\misc.h
........................\.........\.....\...\stm32f10x_adc.h
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........................\.........\.....\...\stm32f10x_can.h
........................\.........\.....\...\stm32f10x_cec.h
........................\.........\.....\...\stm32f10x_crc.h
........................\.........\.....\...\stm32f10x_dac.h
........................\.........\.....\...\stm32f10x_dbgmcu.h
........................\.........\.....\...\stm32f10x_dma.h
........................\.........\.....\...\stm32f10x_exti.h
........................\.........\.....\...\stm32f10x_flash.h
........................\.........\.....\...\stm32f10x_fsmc.h
........................\.........\.....\...\stm32f10x_gpio.h
........................\.........\.....\...\stm32f10x_i2c.h
........................\.........\.....\...\stm32f10x_iwdg.h
........................\.........\.....\...\stm32f10x_pwr.h
........................\.........\.....\...\stm32f10x_rcc.h
........................\.........\.....\...\stm32f10x_rtc.h
........................\.........\.....\...\stm32f10x_sdio.h
........................\.........\.....\...\stm32f10x_spi.h
........................\.........\.....\...\stm32f10x_tim.h
........................\.........\.....\...\stm32f10x_usart.h
........................\.........\.....\...\stm32f10x_wwdg.h
........................\.........\.....\src\misc.c
........................\.........\.....\...\stm32f10x_adc.c
........................\.........\.....\...\stm32f10x_bkp.c
........................\.........\.....\...\stm32f10x_can.c
........................\.........\.....\...\stm32f10x_cec.c
........................\.........\.....\...\stm32f10x_crc.c
........................\.........\.....\...\stm32f10x_dac.c
........................\.........\.....\...\stm32f10x_dbgmcu.c
........................\.........\.....\...\stm32f10x_dma.c
........................\.........\.....\...\stm32f10x_exti.c
........................\.........\.....\...\stm32f10x_flash.c
........................\.........\.....\...\stm32f10x_fsmc.c
........................\.........\.....\...\stm32f10x_gpio.c
........................\.........\.....\...\stm32f10x_i2c.c
........................\.........\.....\...\stm32f10x_iwdg.c
........................\.........\.....\...\stm32f10x_pwr.c
........................\.........\.....\...\stm32f10x_rcc.c
........................\.........\.....\...\stm32f10x_rtc.c
........................\.........\.....\...\stm32f10x_sdio.c
........................\.........\.....\...\stm32f10x_spi.c
........................\.........\.....\...\stm32f10x_tim.c
........................\.........\.....\...\stm32f10x_usart.c
........................\.........\.....\...\stm32f10x_wwdg.c
........................\..sting\startup_stm32f10x_hd.lst
........................\.......\流水灯.map
........................\Output\bsp_led.crf
........................\......\bsp_led.d
........................\......\bsp_led.o
........................\......\bsp_systick.crf
........................\......\bsp_systick.d
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