binary to bcd

[jimbob jones]

I need to convert a 8 bit binary output to 2 bcd numbers for driving 2 seven seg displaysfrom an 8051.If anyone could tell me how to do this as a software solution in the mcs 51 assembler language.

 

[Electrix]

:idea: Have a Look-Up Table

 

[jimbob jones]

binary to bcd

POST DELETED BY MODERATOR!

 

[Electrix]

come again ?


U disgusting worm
** MODS please step in **

 

[jimbob jones]

biary tto bcd

I must apologise for my comment, a friend of mine was messing about and wrote that. I hope no one was offended by those silly remarks. Still is there anyone proficient in mcs 51 assembler language that can help me with the original problem.

 

[kinjalgp]

Here is how you do it:

;********************************************************************
; FUNCTION: BIN2BCD8
; PURPOSE:  CONVERTS 8-BIT NUMBER TO TWO BCD DIGITS
; INPUT:    A HAS 8-BIT NUMBER TO BE CONVERTED TO BCD
; OUTPUT:   BCD1 = HIGH NIBBLE
;           BCD0 = LOW NIBBLE
;********************************************************************
BIN2BCD8:
    MOV     R0,A
    ANL     A,#0FH
    ADD     A,#0F6H
    JNC     BB2
    ADD     A,#07H
BB2:ADD     A,#3AH
    XCH     A,R0
    SWAP    A
    ANL     A,#0FH
    ADD     A,#0F6H
    JNC     BB3
    ADD     A,#07H
BB3:ADD     A,#3AH
    MOV     BCD1, A
    MOV     BCD0, R0
    RET

 

[jimbob jones]

binary to bcd

Good man. Thanks for the help, i was going to use a binary to bcd converter ,a 74185 but couldnt get one. Much better to do it with software. I am only beginning assembler so i was'nt fully familiar with all the instructions.