//*** TDLPortIO: DriverLINX Port IO Driver wrapper component DEMO ************
//** **
//** File: Main.pas **
//** **
//** Copyright (c) 1999 John Pappas (DiskDude). All rights reserved. **
//** This software is CardWare; if you use it, you must send me a **
//** PostCard - see the documentation, or contact me for more **
//** information. **
//** **
//** Please notify me if you make any changes to this file. **
//** Email: diskdude@poboxes.com **
//** **
//*** http://diskdude.cjb.net/ ***********************************************
unit Main;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
PortIO, StdCtrls;
//---------------------------------------------------------------------------
// Types
//---------------------------------------------------------------------------
type
TBase = (bDecimal, bHex);
TDataType = (dtByte, dtWord, dtDWord);
//---------------------------------------------------------------------------
// TMain_Win class
//---------------------------------------------------------------------------
type
TMain_Win = class(TForm)
QuitButton: TButton;
PortGroup: TGroupBox;
Label1: TLabel;
Label2: TLabel;
PortEdit: TEdit;
ReadButton: TButton;
WriteButton: TButton;
DataEdit: TEdit;
BaseGroup: TGroupBox;
Base10Radio: TRadioButton;
Base16Radio: TRadioButton;
TypeGroup: TGroupBox;
ByteRadio: TRadioButton;
WordRadio: TRadioButton;
DWordRadio: TRadioButton;
AboutButton: TButton;
DLPortIO: TDLPortIO;
procedure AboutButtonClick(Sender: TObject);
procedure Base10RadioClick(Sender: TObject);
procedure Base16RadioClick(Sender: TObject);
procedure QuitButtonClick(Sender: TObject);
procedure ReadButtonClick(Sender: TObject);
procedure WriteButtonClick(Sender: TObject);
procedure ByteRadioClick(Sender: TObject);
procedure WordRadioClick(Sender: TObject);
procedure DWordRadioClick(Sender: TObject);
private
{ Private declarations }
FBaseMode : TBase;
FDataType : TDataType;
public
{ Public declarations }
constructor Create(Owner : TComponent); override;
end;
var
Main_Win: TMain_Win;
implementation
{$R *.DFM}
//---------------------------------------------------------------------------
// Constructor for TMain_Win
//---------------------------------------------------------------------------
constructor TMain_Win.Create(Owner : TComponent);
begin
inherited Create(Owner);
FBaseMode:=bHex; // Hex mode as default
FDataType:=dtByte; // Byte mode as default
// Default port
PortEdit.Text:='$378'; // LPT1:
DataEdit.Text:='$00';
// Driver is in the same directory as the demo.exe file!
DLPortIO.DriverPath:=ExtractFileDir(ParamStr(0));
// Open the DriverLINX driver
DLPortIO.OpenDriver();
if (not DLPortIO.ActiveHW) then
begin
MessageDlg('Could not open the DriverLINX driver.', mtError, [mbOK], 0);
PortGroup.Enabled:=false;
BaseGroup.Enabled:=false;
TypeGroup.Enabled:=false;
end;
end;
//---------------------------------------------------------------------------
// Base10RadioClick()
// Change the base of the edit boxes to decimal
//---------------------------------------------------------------------------
procedure TMain_Win.Base10RadioClick(Sender: TObject);
begin
if (FBaseModebDecimal) then
begin
// Now in decimal mode
FBaseMode:=bDecimal;
try
PortEdit.Text:=IntToStr(StrToInt(PortEdit.Text));
except
PortEdit.Text:='0';
end;
try
DataEdit.Text:=IntToStr(StrToInt(DataEdit.Text));
except
DataEdit.Text:='0';
end;
end;
end;
//---------------------------------------------------------------------------
// Base16RadioClick()
// Change the base of the edit boxes to hex
//---------------------------------------------------------------------------
procedure TMain_Win.Base16RadioClick(Sender: TObject);
begin
if (FBaseModebHex) then
begin
// Now in hex mode
FBaseMode:=bHex;
try
PortEdit.Text:='$'+IntToHex(StrToInt(PortEdit.Text),0);
except
DataEdit.Text:='$0000';
end;
try
DataEdit.Text:='$'+IntToHex(StrToInt(DataEdit.Text),0);
except
DataEdit.Text:='$00';
end;
end;
end;
//---------------------------------------------------------------------------
// QuitButtonClick()
// Quit the demo
//---------------------------------------------------------------------------
procedure TMain_Win.QuitButtonClick(Sender: TObject);
begin
Close;
end;
//---------------------------------------------------------------------------
// ReadButtonClick()
// Reads a byte into the DataEdit box
//---------------------------------------------------------------------------
procedure TMain_Win.ReadButtonClick(Sender: TObject);
var
DataPort : Word; // Port to read data from
DataRead : Longword; // Data read from port
begin
// Get the data port address
try
DataPort:=Word(StrToInt(PortEdit.Text));
except
MessageDlg('You have specified an invalid port.'+#13+
'No action performed.',
mtError, [mbOK], 0);
Exit;
end;
// Read the data
case FDataType of
dtByte: DataRead:=DLPortIO.Port[DataPort];
dtWord: DataRead:=DLPortIO.PortW[DataPort];
dtDWord: DataRead:=DLPortIO.PortL[DataPort];
end;
if (FBaseMode=bDecimal) then
DataEdit.Text:=IntToStr(DataRead)
else
DataEdit.Text:='$'+IntToHex(DataRead, 0);
end;
//---------------------------------------------------------------------------
// WriteButtonClick()
// Writes a byte of data from DataEdit to PortEdit
//---------------------------------------------------------------------------
procedure TMain_Win.WriteButtonClick(Sender: TObject);
var
DataPort : Word; // Port to read data from
DataWrite : Longword; // Data to write to port
begin
// Get the data port address
try
DataPort:=Word(StrToInt(PortEdit.Text));
except
MessageDlg('You have specified an invalid port.'+#13+
'No action performed.',
mtError, [mbOK], 0);
Exit;
end;
// Get the data to write
try
DataWrite:=Longword(StrToInt(DataEdit.Text));
except
MessageDlg('You have specified an invalid port.'+#13+
'No action performed.',
mtError, [mbOK], 0);
Exit;
end;
// Write the data
case FDataType of
dtByte: DLPortIO.Port[DataPort]:=Byte(DataWrite and $FF);
dtWord: DLPortIO.PortW[DataPort]:=Word(DataWrite and $FFFF);
dtDWord: DLPortIO.PortL[DataPort]:=DataWrite;
end;
end;
//---------------------------------------------------------------------------
// ByteRadioClick()
// Set for Byte writing
//---------------------------------------------------------------------------
procedure TMain_Win.ByteRadioClick(Sender: TObject);
begin
FDataType:=dtByte;
end;
//---------------------------------------------------------------------------
// WordRadioClick()
// Set for Word writing
//---------------------------------------------------------------------------
procedure TMain_Win.WordRadioClick(Sender: TObject);
begin
FDataType:=dtWord;
end;
//---------------------------------------------------------------------------
// DWordRadioClick()
// Set for Double Word writing
//---------------------------------------------------------------------------
procedure TMain_Win.DWordRadioClick(Sender: TObject);
begin
FDataType:=dtDWord;
end;
//---------------------------------------------------------------------------
// AboutButtonClick()
// Shows the about dialog box
//---------------------------------------------------------------------------
procedure TMain_Win.AboutButtonClick(Sender: TObject);
begin
MessageDlg(
'DriverLINX driver wrapper component Demo'+#13+
'Copyright (c) 1999 John Pappas (DiskDude). All rights reserved.'+#13+#13+
'See http://diskdude.cjb.net/ for the latest version.',
mtInformation,
[mbOK],
0);
end;
end.
