how to convert binary to BCD or decimal in assembly

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mohamed saleh

Joined: 26 Aug 2006
Posts: 64

05 Sep 2006 21:35 binary to bcd assembly code

i want to know how to convert binary to BCD or decimal in assembly

i want a code

thanks

Ave_Rapina

Joined: 06 Jan 2004
Posts: 121
Helped: 14
Location: Po

05 Sep 2006 22:05 convert bcd to decimal

Hello

In assembly you can use an instruction that is DA that means Decimal adjust.

Regards

16F676

Joined: 14 Aug 2006
Posts: 44
Helped: 3

05 Sep 2006 22:17 binary to bcd assembly

This is the routine to convert 16bit binary to BCD in assembly
for pic micro.

Code:

CBLOCK 0X20

BCDvalH
BCDvalM
BCDvalL
MCount
NumbHi
NumbLo
ENDC

;
; Binary to BCD conversion routine
; 16 bit number to convert is in NumbHi, NumbLo
; result is set in BCDval HML
;
HexBCD movlw d'16'
movwf MCount
clrf BCDvalH
clrf BCDvalM
clrf BCDvalL
bcf STATUS,C

loop16 rlf NumbLo,F
rlf NumbHi,F
rlf BCDvalL,F
rlf BCDvalM,F
rlf BCDvalH,F

decf MCount,F
btfsc STATUS,Z
return

adjDEC movlw BCDvalL
movwf FSR
call adjBCD
movlw BCDvalM
movwf FSR
call adjBCD
movlw BCDvalH
movwf FSR
call adjBCD
goto loop16

adjBCD movlw d'3'
addwf INDF,W
movwf Temp
btfsc Temp,3
movwf INDF
movlw 30h
addwf INDF,W
movwf Temp
btfsc Temp,7
movwf INDF
return
end

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05 Sep 2006 22:17 Ads

khaled_shaheen

Joined: 05 Sep 2006
Posts: 6

05 Sep 2006 22:51 hex to bcd assembly

mohamed saleh wrote:

i want to know how to convert binary to BCD or decimal in assembly

i want a code

thanks

you can use simble method for converting 8 bit binary number into decimal equivelt stored in 3 memory locations
code for 8051 family( let r0 contain the binary number and r1,r2,r3 contain decimal equavelent)

BIN_DEC: MOV A,R0
MOV B,#100
DIV AB
MOV R3,A ; R3 CONTAIN HUNDRED NUMBER
MOV A,B
MOV B,#10
DIV AB
MOV R2,A ; R2 CONTAIN TENTH NUMBER
MOV R1,B ; R1 CONTAIN LEFT DECIMAL NUMBER
RET