A conversion question (Integer to BCD-string to byte)

Posted on 2003-12-03
Last Modified: 2010-04-05
Hi all,

I'm currently stuck on a small problem....I know the solution should not be too hard to come by, but I just can't figure it out....

I'm working on an application that communicates with a piece of hardware through the serial port. The communication's up and running, no problems there. There is one problem though, I need to be able to set the time and date of the hardware, and the hardware expects that in bcd (binary coded decimal). The communication expects bytes.

I've written a conversion function, that takes an integer value, and returns a string, which contains a two-digit bcd code. What I want is to convert that string to a byte, and send that byte to the serialport, without any more calculation, to be sure I don't lose the bcd value.

If anyone can think of a better way, I'd love to hear it, this is getting silly!

In my opinion it should be possible to just create a byte out of the two sets of 4 bits the bcd code is made up of, but I'm creating my own blind spots or something...


Question by:Binsky
  • 2

Expert Comment

ID: 9868099
I don't understand yet what you want... So, you've done this:

LowBCD.Text := IntToHex(Display,4);

to get the BCD... Now you need which byte?

Author Comment

ID: 9872843

Actually, what I've done is this :

function TSetupForm.IntToBCD(Value : integer) : string;
   Result := IntToHex(Value div 10, 1) +IntToHex(Value mod 10, 1);

Now I've got a string containing the BCD translation of any integer, but what I want to have is one byte containing the same info...


Author Comment

ID: 9902341

I've answered the question myself...

The conversion is :

BCD := ((16*(DecimalValue div 10)) + (DecimalValue mod 10));
DEC := ((10*(BCDValue div 16))      + (BCDValue mod 16));


(Do I get the points myself?) ;-)

Accepted Solution

Computer101 earned 0 total points
ID: 9931963
PAQed, with points refunded (125)

E-E Admin

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
delphi exception 7 63
Delphi Form ownership 4 73
delphi parse string to params 3 100
Need Help Delphi 2010 CheckBox1 Stored value in memo 13 57
Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

895 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now