Converting float or negative integer to hexadecimal in Borland Delphi

Question

Ive written a program that communicate with some hardware using a serial connection. It sends a lot of hexadecimal values my way (sensor readings) and every once in a while it s

Answer 1

to convert a hex string into a integer, you can use the StrToInt Function , also you can check the TryStrToInt function (wich returns False if string does not represent a valid number).

uses
SysUtils;

var
ivalue : integer;
begin
ivalue:=StrToInt('$FFFFF5D6'); // Hexadecimal values start with a '$' in Delphi

..
end;

For the Hexadecimal representation of a float number, you can check theses articles.

• http://www.merlyn.demon.co.uk/pas-type.htm#Str
• http://www.merlyn.demon.co.uk/pas-real.htm
• http://www.merlyn.demon.co.uk/programs/hexfloat.pas (source code example)