Using the MCU serial port to expand 16 LEDs-EEWORLD

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Title: Use the serial port of a single-chip microcomputer to expand 16 light-emitting diodes. Draw a circuit diagram and write a program to make the 16 light-emitting diodes emit light in different sequences (the time interval between light-emitting diodes is 1s).

Answer:

MOV SCON,#00H

CLR P1.1

MOV R7,#16

MOV A,#10000000B

LOOP: MOV SBUF,A

JNB TI,$

ACALL DELAY1S

R A

DJNZ R7,LOOP

RET

Picture 1

Keywords：MCU Reference address：Using the MCU serial port to expand 16 LEDs

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