[Lazarus] Usage of Serial in a testing program?

[Bo Berglund]

On Sun, 23 Sep 2018 08:39:52 +0200, Bo Berglund via Lazarus
<lazarus at lists.lazarus-ide.org> wrote:

>I have now come as far in my application as I can test the way the
>Serial unit opens and closes com ports.
>It turns out that on Windows there are two port name syntaxes:
>
>Ports 1..9:     COM1 to COM9 will work
>Ports 10..255:  Only \\.\COM10 to \\.\COM255 will work
>
>But one does not need to use different naming depending on the port
>number, the second syntax \\.\COMx works also for ports 1..9

Forgot to add a question regarding making this a cross-platform
program:

If I add a check for the platform inside my program, how sghould it
look like to work on both Windows and Linux?

Something like this:

function TWiFiCommTester.ConnectSerial(Port: byte; Baud: integer):
boolean;
var
  ComportName: string;
  Flags: TSerialFlags;
begin
  FLastError := '';
  {$IFDEF WINDOWS}
  ComPortName:= '\\.\COM' + IntToStr(Port);
  {$ENDIF}
  {$IFDEF UNIX}
     //What goes here?
     ComPortName := ????
  {$ENDIF}
  FSerial := SerOpen(ComPortName);
  ....


-- 
Bo Berglund
Developer in Sweden