STM32F051 demo made by me，it s simple and esay to understand.

KeyBoard\Lib\CMSIS\Device\Include\stm32f0xx.h
........\...\.....\......\.......\system_stm32f0xx.h
........\...\.....\......\Source\startup_stm32f030.s
........\...\.....\......\......\startup_stm32f031.s
........\...\.....\......\......\startup_stm32f042.s
........\...\.....\......\......\startup_stm32f051.s
........\...\.....\......\......\startup_stm32f072.s
........\...\.....\......\......\startup_stm32f0xx.s
........\...\.....\......\......\startup_stm32f0xx_ld.s
........\...\.....\include\arm_math.h
........\...\.....\.......\core_cm0.h
........\...\.....\.......\core_cm0plus.h
........\...\STM32F0xx_StdPeriph_Driver\inc\stm32f0xx_adc.h
........\...\..........................\...\stm32f0xx_can.h
........\...\..........................\...\stm32f0xx_cec.h
........\...\..........................\...\stm32f0xx_comp.h
........\...\..........................\...\stm32f0xx_crc.h
........\...\..........................\...\stm32f0xx_crs.h
........\...\..........................\...\stm32f0xx_dac.h
........\...\..........................\...\stm32f0xx_dbgmcu.h
........\...\..........................\...\stm32f0xx_dma.h
........\...\..........................\...\stm32f0xx_exti.h
........\...\..........................\...\stm32f0xx_flash.h
........\...\..........................\...\stm32f0xx_gpio.h
........\...\..........................\...\stm32f0xx_i2c.h
........\...\..........................\...\stm32f0xx_iwdg.h
........\...\..........................\...\stm32f0xx_misc.h
........\...\..........................\...\stm32f0xx_pwr.h
........\...\..........................\...\stm32f0xx_rcc.h
........\...\..........................\...\stm32f0xx_rtc.h
........\...\..........................\...\stm32f0xx_spi.h
........\...\..........................\...\stm32f0xx_syscfg.h
........\...\..........................\...\stm32f0xx_tim.h
........\...\..........................\...\stm32f0xx_usart.h
........\...\..........................\...\stm32f0xx_wwdg.h
........\...\..........................\src\stm32f0xx_adc.c
........\...\..........................\...\stm32f0xx_can.c
........\...\..........................\...\stm32f0xx_cec.c
........\...\..........................\...\stm32f0xx_comp.c
........\...\..........................\...\stm32f0xx_crc.c
........\...\..........................\...\stm32f0xx_crs.c
........\...\..........................\...\stm32f0xx_dac.c
........\...\..........................\...\stm32f0xx_dbgmcu.c
........\...\..........................\...\stm32f0xx_dma.c
........\...\..........................\...\stm32f0xx_exti.c
........\...\..........................\...\stm32f0xx_flash.c
........\...\..........................\...\stm32f0xx_gpio.c
........\...\..........................\...\stm32f0xx_i2c.c
........\...\..........................\...\stm32f0xx_iwdg.c
........\...\..........................\...\stm32f0xx_misc.c
........\...\..........................\...\stm32f0xx_pwr.c
........\...\..........................\...\stm32f0xx_rcc.c
........\...\..........................\...\stm32f0xx_rtc.c
........\...\..........................\...\stm32f0xx_spi.c
........\...\..........................\...\stm32f0xx_syscfg.c
........\...\..........................\...\stm32f0xx_tim.c
........\...\..........................\...\stm32f0xx_usart.c
........\...\..........................\...\stm32f0xx_wwdg.c
........\MAIN\main.c
........\....\main.h
........\....\readme.txt
........\....\stm32f0xx_conf.h
........\....\stm32f0xx_it.c
........\....\stm32f0xx_it.h
........\....\system_stm32f0xx.c
........\Pro\MDK\JLinkLog.txt
........\...\...\JLinkSettings.ini
........\...\...\KeyBoard.map
........\...\...\KeyBoard.plg
........\...\...\KeyBoard.uvgui.Administrator
........\...\...\KeyBoard.uvgui_Administrator.bak
........\...\...\KeyBoard.uvopt
........\...\...\KeyBoard.uvproj
........\...\...\KeyBoard_Target 1.dep
........\...\...\KeyBoard_uvopt.bak
........\...\...\KeyBoard_uvproj.bak
........\...\...\startup_stm32f051.lst
........\...\...\startup_stm32f0xx.s
........\...\OUT\ExtDll.iex
........\...\...\K

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