VTech Alphabert s Magic Readport User Manual download pdf (Page 31)

BM Dept., Govt. Engg. College, Gandhinagar Page 31

EXPERIMENT NO. 8

Aim: Interface seven segment display with Port P1. Write program to display number 0 to 9 on

the seven segment display. Use delay between two counts.

Program 1: Display Count value on seven segment display.

Circuit diagram:

Program:

 ORG 00h

AJMP start

ORG 03h

RETI

start:

MOV P1,#00h ;Configure port 1 as output port

again: MOV DPTR,#CODE ;Initialize DPTR as a base address for code

next: CLR A

MOVC A,@A+DPTR ; Get seven segment code

JZ AGAIN

MOV P1,A ;Display count value

ACALL DELAY

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 79 80

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VTech Alphabert s Magic Readport User Manual Page 31