Saturday, April 30, 2016

8051 Program – bcd to hex 8bit

; bcd to hex conversion
; input: 4000H
; output: 4001H
ORG 0H
BCD_ADDR EQU 4000H
MAIN:
MOV A, #ASCII_1 ; fill memory with ascii
MOV DPTR,#BCD_ADDR ; fill memory
MOV A, #15H
MOVX @DPTR,A
LCALL CONV
SJMP MAIN
CONV:
MOV DPTR,#BCD_ADDR
MOVX A,@DPTR
MOV R5,A
ANL A,#0F0H
SWAP A
MOV R1,A
MOV A,R5
ANL A,#0FH
MOV R2,A
MOV A,R1
MOV B,#0AH
MUL AB
ADD A,R2
INC DPTR
MOVX @DPTR,A
RET
END


Steps:
Separate the given 8bit packed bcd number in to two 4bit unpacked bcd nibbles (bcd1 and bcd2)
Multiply bcd2 with 10
Add bcd1 to the answer from above.

START
GET MOST SIGNIFICANT DIGIT (MSD)
MSD = MSD x 10
HEX DATA = MSD + LSD (LEAST SIGNIFICANT DIGIT)
STORE HEX DATA
STOP



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 - ascii to bcd   |   8051 Program - hex to bcd 8bit   |   8051 Program - hex to bcd 12bit   |   8051 Program - memory subroutines   |   8051 Program - math subroutines   |   8051 Program - conversion subroutines

List of topics: 8051

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