Decimal to 2 digit hex conversion

Question

1.00/5 (1 vote)

See more:

In my code label26 is "CHOL" and i'm converting it to hex as "43484f4c" using below code and storing it in my database MS ACCESS using VB6 but now i want to save it as 2-digit hex code i want to allocate it only 2 bytes how is it possible

Thank You

What I have tried:

str = Label26.Caption
bytes = StrConv(str, vbFromUnicode)
str = ""
For i = LBound(bytes) To UBound(bytes)
str = str & Format$(Hex$(bytes(i)), "00") Next i
Label26.Caption = str
str = StrConv(bytes, vbUnicode)
rs.Fields("NameofTest").Value = Label26.Caption

Posted 12-Feb-18 20:44pm

ramadevi82

Updated 12-Feb-18 21:48pm

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2018-02-12T21:40:00

Solution 1

It isn't. The problem is that - at the very least - that is four alphabetic characters: 'A' to 'Z' in each place. That means that there are 26 possible values for each of the four characters that make up your code (or 36 if you also permit digits).
Two bytes can only hold four * 16 values - 0 to 65535 - and four * 26 requires 0 to 456875 which will not physically fit in two bytes.

Posted 12-Feb-18 21:40pm

OriginalGriff

Comments

ramadevi82 13-Feb-18 4:46am

or can i store in packet format?
if yes,can u help me in coding

OriginalGriff 13-Feb-18 4:53am

How would I know? I have no information about what you are doing other than exactly what you have typed, and so far that's just asking for something that isn't physically possible!
I have no idea why you are trying to do this, what your code is used for, anything.

ramadevi82 13-Feb-18 5:18am

my code is used for biomedical machine.we perform some tests in it.to run a test we need some parameter values.previously we used to store the values manually using keypad but now i'm trying to store the values in pc and send them through rs232 to the machine.
for example,we have temperature as 37 degC,Test name as "CHOL"(cholesterol),aspiration volume etc...to those fields i have to save values

OriginalGriff 13-Feb-18 5:26am

So the first thing you need to do is look at the communications with the machine, and what it accepts, and how it accepts them - because until you know exactly what you can send (and how you can send it) there is no point at all in starting to code, or even starting to design code - you can't change what the machine does, so you need to work round that. And that means fully understand the communications to it, and testing what you want to do using something like Hyperterminal to prove the concept before you start coding.

ramadevi82 13-Feb-18 5:45am

i have to send the code in hex format and already the code has been developed earlier in C code now according to that i have to set parameters

ramadevi82 13-Feb-18 5:20am

through VB6 programming i have to send parameter values

ramadevi82 13-Feb-18 5:45am

and the communication is through rs232

OriginalGriff 13-Feb-18 6:01am

Oh good grief...
RS232 is a physical layer communication specification: it specifies the electrical characteristics of the communication link in terms of voltages and whether they mean a "1" or a "0" in bit terms. It doesn't specify what those "1"'s and "0"'s mean to either end of the link, how fast they should be sent, or what interpretation should be put on them. Heck, it doesn't even define if the link is synchronous, asynchronous, or how big a character is (or even if characters are used at all).
If you have C code which you should be following - because it works - then read that and see what it does. Because "sending parameters" is not an RS232 function: it's about layer 2 of the 7 layer model of which RS232 is layer seven, right at the bottom!

ramadevi82 13-Feb-18 6:05am

Ok thank you i'll check and one more doubt..i said previously that i'm converting the parameters to hex so "CHOL" is converted to "43484f4c" and saved in database but can i form it as a packet structure with RS-232 Frame as (1 start bit, 7 data bits, 1 parity bits, and 2 stop bits).