The circuit and program to display 1234 on 4 seven-segment LED digital tubes-EEWORLD

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The circuit and program to display 1234 on 4 seven-segment LED digital tubes

START:MOV P2,#11100001B

LCALL D2MS

MOV P2,#11010010B

LCALL D2MS

MOV P2,#10110011B

LCALL D2MS

MOV P2,#01110100B

LCALL D2MS

SJMP START

Thinking: Program to display 30H, 31H on 4 seven-segment LED digital tubes.

The contents of units 32H and 33H.

The circuit and program to display 1234 on 4 seven-segment LED digital tubes

START: MOV R0,#30H

MOV R7,#4

MOV R2, #0E0H

UP: MOV A,@R0

ENT A，R2

MOV P1,A

LCALL D2MS

INC R0

MOV A,R2

RL A

MOV R2,A

DJNZ R7,UP

SJMP START

The circuit and program to display 1234 on 4 seven-segment LED digital tubes

Example: Program to display the contents of 30H, 31H, 32H, and 33H units on four seven-segment LED digital tubes.

The circuit and program to display 1234 on 4 seven-segment LED digital tubes

START: MOV R0,#30H

MOV R7,#4

MOV R2,#0FEH

MOV DPTR,#TAB

UP: MOV A,@R0

MOVC A,@A+DPTR

MOV P1,A

MOV P3,R2

LCALL D2MS

INC R0

MOV A,R2

RL A

MOV R2,A

DJNZ R7,UP

SJMP START

TAB : DB 3FH,06H,5BH,4FH

DB 66H,6DH,7DH,07H

DB 7FH,6FH

Keywords：LED Reference address：The circuit and program to display 1234 on 4 seven-segment LED digital tubes

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