unit SimplePort2u1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  SmallPort, StdCtrls, Spin, ExtCtrls;

type
  TForm1 = class(TForm)
    Button2: TButton;
    Button3: TButton;
    SmallPort1: TSmallPort;
    Label1: TLabel;
    Button1: TButton;
    SpinEdit1: TSpinEdit;
    Button4: TButton;
    Label2: TLabel;
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure Button1Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

// use "smport.vxd" driver with Win95/98,
// copy file to "Windows\System" directory or to directory of your application

// use "smport.sys" driver with WIN NT/2000,
// copy file to "WinNT\SYSTEM32" directory or to directory of your application

procedure TForm1.Button2Click(Sender: TObject);
begin
    SmallPort1.Port[$378]:=0;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
    SmallPort1.Port[$378]:=$ff;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
   SmallPort1.Opened:=true;
end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
   SmallPort1.Opened:=false;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
    SmallPort1.Port[$378]:=SpinEdit1.Value;
end;

procedure TForm1.Button4Click(Sender: TObject);
var
 Data: Byte;
 S : String;
begin
  Data := SmallPort1.Port[$378];
  Str(Data, S);
  Label2.Caption:=S;
end;

end.