8051 Program – hex to ascii

; hex to ascii conversion
; input: 4000H
; output: 4001H-4002H
	ORG 0H
	HEX_ADDR EQU 4000H
	ASCII_ADDR EQU 4001H
MAIN:
	MOV DPTR,#HEX_ADDR	; fill memory
	MOV A,#0FBH
	MOVX @DPTR,A
	LCALL CONV
	SJMP MAIN
CONV:
	MOV R7, #2
	MOV DPTR,#HEX_ADDR
	MOVX A,@DPTR
	MOV B,A
	ANL A,#0F0H
	SWAP A
	MOV R6,A
	SJMP find
loop:	MOV A,B
	ANL A,#0FH
	MOV R6,A
find:	CLR C
	SUBB A,#0AH
	JC down	;if carry, jump to label down
	MOV A,R6
	ADD A,#37H	;add 37 to a
	sjmp store
down:	MOV A,R6
	ADD A, #30H	;add 30h to a
store:	INC DPTR	;increment dptr
	MOVX @DPTR,A	; move data from a to external memory location
	DJNZ R7,loop
	RET
	END

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List of topics: 8051

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