VTech Alphabert s Magic Readport User Manual download pdf (Page 57)

BM Dept., Govt. Engg. College, Gandhinagar Page 57

INC DPTR

SJMP CHECK_C

GET_CODE: CLR A

MOVC A,@A+dptr

MOV P0,A

LJMP REL

DELAY: MOV R7,#0FFh

DLOOP: MOV R6,#0FFh

D_LOOP: DJNZ R6,D_LOOP

DJNZ R7,DLOOP

RET

KCODE0: DB '0','1','2','3' ;These codes are for LCDs

KCODE1: DB '4','5','6','7' ;Replace this code by seven

KCODE2: DB '8','9','A','B' ;segment code as per your

KCODE3: DB 'C','D','E','F' ;Circuit.

:: WORKSHEET ::

Exercise:

A. Prepare seven segment code for common anode seven segment display and replace it

with ASCII code in look up table as shown in the program. Run the program and see the

result.

Memory

Location

HEX

code

Label Opcode Operands Comments

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 ... 79 80

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VTech Alphabert s Magic Readport User Manual Page 57