Ultrasonic Distance Measurement Based on C8051F040 source code, I believe that for those familiar with the C8051F MCU and its use have great usefulness

F040超声测距
............\20-6 超声测距
............\.............\c8051F040.h
............\.............\mylcd.h
............\.............\PUTCHAR.C
............\.............\ultra_sonci.c

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