8051 Program – ascii to bcd

; ASCII to BCD
; To convert ASCII to packed BCD,
; it is first converted to unpacked BCD(to mask 3) and
; then combined to make packed BCD.
; 40H = 34H ascii
; 41H = 35H ascii
; 42H = 45H bcd
	ORG 0H
	ADDR EQU 40H
	ASCII_1 EQU 34H
	ASCII_2 EQU 35H
MAIN:
MOV A, #ASCII_1	; fill memory with ascii
	MOV R0,#ADDR
	MOV @R0, A
	INC R0
	MOV A, #ASCII_2
	MOV @R0, A
	LCALL CONV
	SJMP MAIN
CONV:
	MOV R0,#ADDR	;R0=40h,Internal memory adress
	MOV A,@R0	;a=hex value of Ist ASCII number
	ANL A,#0FH	;mask upper nibble
	SWAP A	;swap upper and lower nibble of a
	MOV B,A	;save the number in B
	INC R0	;increment R0
	MOV A,@R0	;get the next number from memory
	ANL A,#0FH	;mask Higher nibble
	ORL A,B	;or a & B
	INC R0	;increment memory address to store the result
	MOV @R0,A	;move the content of A to internal RAM location
	RET
	END

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Related topics:
8051 Program - decimal to hex   |   8051 Program - hex to decimal 8bit   |   8051 Program - decimal to ascii   |   8051 Program - ascii to decimal   |   8051 Program - hex to ascii   |   8051 Program - ascii to hex   |   8051 Program - bcd to ascii   |   8051 Program - bcd to hex 8bit   |   8051 Program - hex to bcd 8bit   |   8051 Program - hex to bcd 12bit   |   8051 Program - memory subroutines   |   8051 Program - math subroutines   |   8051 Program - conversion subroutines

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List of topics: 8051

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