File list (Check if you may need any files):
HC_SR_04\HCSR04_lib\hcsr04.c
........\..........\hcsr04.h
........\KeilC\hc_sr04.uvgui.anh vuong
........\.....\hc_sr04.uvgui_anh vuong.bak
........\.....\hc_sr04.uvopt
........\.....\hc_sr04.uvproj
........\.....\hc_sr04_hc_sr04.dep
........\.....\hc_sr04_lcd_test.dep
........\.....\list\lcd1602test.map
........\.....\....\startup_stm32f40_41xxx.lst
........\.....\obj\hcsr04.crf
........\.....\...\hcsr04.d
........\.....\...\hcsr04.o
........\.....\...\lcd.crf
........\.....\...\lcd.d
........\.....\...\lcd.o
........\.....\...\lcd1602test.axf
........\.....\...\lcd1602test.build_log.htm
........\.....\...\lcd1602test.htm
........\.....\...\lcd1602test.lnp
........\.....\...\lcd1602test.sct
........\.....\...\main.crf
........\.....\...\main.d
........\.....\...\main.o
........\.....\...\misc.crf
........\.....\...\misc.d
........\.....\...\misc.o
........\.....\...\reprintf.crf
........\.....\...\reprintf.d
........\.....\...\reprintf.o
........\.....\...\startup_stm32f40_41xxx.d
........\.....\...\startup_stm32f40_41xxx.o
........\.....\...\stm32f4xx_gpio.crf
........\.....\...\stm32f4xx_gpio.d
........\.....\...\stm32f4xx_gpio.o
........\.....\...\stm32f4xx_it.crf
........\.....\...\stm32f4xx_it.d
........\.....\...\stm32f4xx_it.o
........\.....\...\stm32f4xx_rcc.crf
........\.....\...\stm32f4xx_rcc.d
........\.....\...\stm32f4xx_rcc.o
........\.....\...\stm32f4_delay.crf
........\.....\...\stm32f4_delay.d
........\.....\...\stm32f4_delay.o
........\.....\...\system_stm32f4xx.crf
........\.....\...\system_stm32f4xx.d
........\.....\...\system_stm32f4xx.o
........\LCD_lib\lcd.c
........\.......\lcd.h
........\.......\reprintf.c
........\.......\reprintf.h
........\User\main.c
........\....\stm32f4xx_conf.h
........\....\stm32f4xx_it.c
........\....\stm32f4xx_it.h
........\....\stm32f4_delay.c
........\....\stm32f4_delay.h
........\....\system_stm32f4xx.c
........\KeilC\list
........\.....\obj
........\HCSR04_lib
........\KeilC
........\LCD_lib
........\User
HC_SR_04