The measured sound (2.5 meters), the ultrasonic ranging+ serial port output+ 595 four digital tube display+ 1602

超声波++
........\1602.c
........\1602.h
........\74HC595.c
........\74HC595.h
........\LIST
........\....\1602.lst
........\....\74HC595.lst
........\....\SEG.lst
........\....\UR04.m51
........\....\delay.lst
........\....\main.lst
........\....\uart.lst
........\OBJ
........\...\1602.obj
........\...\74HC595.obj
........\...\SEG.obj
........\...\UR04
........\...\UR04.hex
........\...\UR04.lnp
........\...\UR04.plg
........\...\delay.obj
........\...\main.obj
........\...\uart.obj
........\SEG.c
........\SEG.h
........\UR04.plg
........\UR04.uvgui.Administrator
........\UR04.uvopt
........\UR04.uvproj
........\UR04_Opt.Bak
........\UR04_Uv2.Bak
........\UR04_uvopt.bak
........\UR04_uvproj.bak
........\config.h
........\delay.c
........\delay.h
........\main.c
........\main.h
........\uart.c
........\usart.h

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