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- 5th February 2005, 05:36 #1

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## hex to bcd

hi people

can anybody help me out for how to convert a hexadecimal number into BCD format.for eg: i have a counter having count 504 .in hex it is 1F8h .now what will be its BCD code?

please help

thanks

- 5th February 2005, 05:36

- 5th February 2005, 05:54 #2

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## bcd to hex

If 504 is the decimal, convert the 5 and the 0 and the 4 to four bit binary numbers and string them together. 0101 0000 0100 is the answer. Or without spaces 010100000100

- 5th February 2005, 06:26 #3

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## hex to bcd conversion

**hi**

BCD code of every number is completely like decimal and does't depend

on hex fomat, it means that when you have the number 504 in decimal, it's BCD code has 4 bit for digit 4, 4 bit for digit 0 and 4 bit for the digit 5 ( and BCD has no digit more than 9), so in every 8 bit register, you have 2 BCD numbers, so your number will be

0000'0101 0000'0100

**masoud**

- 5th February 2005, 12:12 #4

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## hexadecimal to bcd

Salam,

Hex2BCD Converter using 8051

Code:; ;**************************************************************************** ; ; Description: ; Convert Value In Acc From Hex To BCD. ; ; Entry Requirements: ; Acc Has Value In Binary To Convert To BCD ; ; On Exit: ; Acc Has Entry Value Converted To BCD ; ; Affected: ; PSW.CY, PSW.Z, PSW.P, Acc ; ; Stack: ; 1 Bytes, Not Including Space Used By Called Routines ; ; Comments: ; Values Greater Than 99 Will Not Work Properly. ; ;**************************************************************************** UTIL_BINTOBCD proc push b ; Save B mov b,#10 ; Divide By 10 div ab ; Do Divide swap a ; Move Result To High Of A orl a,b ; OR In Remainder pop b ; Recover B ret ; Return To Caller endproc

- 5th February 2005, 12:12

- 5th February 2005, 13:51 #5

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## hex to bcd converter

thanks for replying but if i have a 16bit value or a 32 bit value in that case how will the code be written with 8051 microcontroller. cause the value in the programming will be hexadecimal .suppose the value in hex is 2ED(h) then how to convert this to BCD form.

- 5th February 2005, 14:48 #6

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## convert hex to bcd

Salam,

You will find a code here

http://www.piclist.com/techref/micro...adix/index.htm

in PIC but you can convert it to 8051 becuase it use simple Bitwise instructions

Bye

- 7th February 2005, 19:17 #7

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## bcd to hex conversion

Originally Posted by**garg29**

- 22nd November 2009, 14:07 #8

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## Re: conversion hex to bcd

in that program 16 bit hex convert to bcd. I dont know the algorithm exactly but the result is right every time.if you have any problem you can ask me...

1 members found this post helpful.

- 4th February 2010, 15:12 #9

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## Re: conversion hex to bcd

sorry wrong post i got entered in....

- 4th February 2010, 20:51 #10

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## conversion hex to bcd

It seems that lot of people have problem with BCD.

BCD stands for Binary Coded Decimal. As we all know decimal numbers have range from 0 to 9, thanslated to binary it is 0b0000 to 0b1001. As the decimal digit occupies no more than 4 bits any 8 bit variable (or register) can contain TWO decimal digits in it's two 4-bit chunks called nibbles.

If you take some datasheets for RTC chips, that's the way of keeping Hours, Minutes, Secinds in only 3 bytes.

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