8051 LED Interfacing

8051 port pins can be used to interface LED’s. We can control the LED by programming the IO pins.

Program to toggle bits in 8255 output ports:

	ORG 0H
	MOV P0, 00H
	MOV A, #55H
AGAIN:
	MOV P0, A
	ACALL DELAY
	CPL A
	SJMP AGAIN
DELAY:	MOV R3, #100
HERE1:	MOV R4, #255
HERE2:	DJNZ R4, HERE2
	DJNZ R3, HERE1
	RET
	END

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Related topics:
8051 External Program Memory Interfacing   |   8051 External Data Memory Interfacing   |   8051 Memory Mapped IO   |   8051 Switch Interfacing   |   8051 Keyboard Interfacing   |   8051 7-Segment Display Interfacing   |   8051 LCD Interfacing   |   8051 ADC Interfacing   |   8051 DAC Interfacing   |   8051 Relay Interfacing   |   8051 Sensor Interfacing   |   8051 Stepper Motor Interfacing   |   8051 DC Motor Interfacing

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List of topics: 8051

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