stc89c52rc 超声波测距
.....................\DS1302.LST
.....................\DS1302.OBJ
.....................\DS1302.c
.....................\DS1302.h
.....................\DS18B20.LST
.....................\DS18B20.OBJ
.....................\DS18B20.c
.....................\DS18B20.h
.....................\LCD1602.LST
.....................\LCD1602.OBJ
.....................\LCD1602.c
.....................\LCD1602.h
.....................\keyscan.LST
.....................\keyscan.OBJ
.....................\keyscan.c
.....................\keyscan.h
.....................\时钟超声波测距
.....................\时钟超声波测距.M51
.....................\时钟超声波测距.hex
.....................\时钟超声波测距.lnp
.....................\时钟超声波测距.plg
.....................\超声波测距
.....................\超声波测距.LST
.....................\超声波测距.M51
.....................\超声波测距.OBJ
.....................\超声波测距.__i
.....................\超声波测距.bak
.....................\超声波测距.c
.....................\超声波测距.hex
.....................\超声波测距.lnp
.....................\超声波测距.plg
.....................\超声波测距.uvopt
.....................\超声波测距.uvproj
.....................\超声波测距_uvopt.bak
.....................\超声波测距_uvproj.bak
原理图和PCB（使用PROTEL软件打开文件里面后缀为SCH和PCB的文件）
.............................................................\带语音播报的超声波测距系统.pcb
.............................................................\带语音播报的超声波测距系统.pcbPreview
.............................................................\带语音播报的超声波测距系统.sch
.............................................................\带语音播报的超声波测距系统.schPreview