C language using ultrasonic communication system is completed through the use of half-duplex transceiver mode, both send and receive ultrasound system to send text messages using the keyboard mode or character, through LCD sending and receiving ends are the same.

Ultrasonic Communication\ADC12\ADC12.c
........................\.....\ADC12.h
........................\CLK_INIT\CLK_INIT.C
........................\........\CLK_INIT.H
........................\.RC\CRC.C
........................\...\CRC.H
........................\Debug\Exe\ultrasonic1.0.d43
........................\.....\Obj\CRC.r43
........................\.....\...\Global.r43
........................\.....\...\main.r43
........................\.....\...\udf_lcd.r43
........................\.....\...\ultrasonic1.pbd
........................\display\display.c
........................\.......\display.h
........................\DS18B20\DS18B20.c
........................\.......\DS18B20.h
........................\Global\Global.c
........................\......\Global.h
........................\keyboard\keyboard.c
........................\........\keyboard.h
........................\main.c
........................\settings\ultrasonic1.0.dbgdt
........................\........\ultrasonic1.0.wsdt
........................\........\ultrasonic1.cspy.bat
........................\........\ultrasonic1.dni
........................\UART\UART.C
........................\....\UART.H
........................\udf_lcd\udf_lcd.c
........................\.......\udf_lcd.h
........................\ultrasonic1.0.dep
........................\ultrasonic1.0.ewd
........................\ultrasonic1.0.ewp
........................\ultrasonic1.0.eww
........................\Debug\Exe
........................\.....\Obj
........................\.....\List
........................\ADC12
........................\CLK_INIT
........................\CRC
........................\Debug
........................\display
........................\DS18B20
........................\Global
........................\keyboard
........................\settings
........................\UART
........................\udf_lcd
Ultrasonic Communication

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