unit TestMain;

{ Test application for the TKPComm serial communications component.       }
{ Form and all controls are created in code (no DFM required).            }

interface

uses
  SysUtils, Classes, WinTypes, WinProcs, Messages,
  Forms, Controls, StdCtrls, KPComm;

type
  TMainForm = class(TForm)
  private
    FComm:          TKPComm;
    FLabelPort:     TLabel;
    FEditPort:      TEdit;
    FLabelSettings: TLabel;
    FEditSettings:  TEdit;
    FBtnOpen:       TButton;
    FBtnClose:      TButton;
    FLabelStatus:   TLabel;
    FLabelRecv:     TLabel;
    FMemoRecv:      TMemo;
    FEditSend:      TEdit;
    FBtnSend:       TButton;
    FLabelInfo:     TLabel;
    procedure BtnCloseClick(Sender: TObject);
    procedure BtnOpenClick(Sender: TObject);
    procedure BtnSendClick(Sender: TObject);
    procedure CommEvent(Sender: TObject);
    procedure UpdateStatus;
  public
    constructor Create(AOwner: TComponent); override;
  end;

var
  MainForm: TMainForm;

implementation


procedure TMainForm.BtnCloseClick(Sender: TObject);
begin
  FComm.PortOpen := False;
  FMemoRecv.Lines.Add('--- Port closed ---');
  UpdateStatus;
end;


procedure TMainForm.BtnOpenClick(Sender: TObject);
begin
  try
    FComm.CommPort   := StrToInt(FEditPort.Text);
    FComm.Settings   := FEditSettings.Text;
    FComm.RThreshold := 1;
    FComm.PortOpen   := True;
    FMemoRecv.Lines.Add('--- Port opened on COM' +
      FEditPort.Text + ' at ' + FEditSettings.Text + ' ---');
  except
    on E: Exception do
      FMemoRecv.Lines.Add('Open failed: ' + E.Message);
  end;
  UpdateStatus;
end;


procedure TMainForm.BtnSendClick(Sender: TObject);
begin
  if Length(FEditSend.Text) = 0 then
    Exit;
  try
    FComm.Output := FEditSend.Text + #13;
    FMemoRecv.Lines.Add('TX: ' + FEditSend.Text);
    FEditSend.Text := '';
  except
    on E: Exception do
      FMemoRecv.Lines.Add('Send failed: ' + E.Message);
  end;
  UpdateStatus;
end;


procedure TMainForm.CommEvent(Sender: TObject);
var
  S: string;
begin
  case FComm.CommEvent of
    comEvReceive:
      begin
        S := FComm.Input;
        if Length(S) > 0 then
          FMemoRecv.Lines.Add('RX: ' + S);
      end;
    comEvCTS:
      FMemoRecv.Lines.Add('CTS changed');
    comEvDSR:
      FMemoRecv.Lines.Add('DSR changed');
    comEvCD:
      FMemoRecv.Lines.Add('CD changed');
    comEvRing:
      FMemoRecv.Lines.Add('Ring');
    comEvEOF:
      FMemoRecv.Lines.Add('EOF received');
    comEvtBreak:
      FMemoRecv.Lines.Add('Break received');
    comEvtFrame:
      FMemoRecv.Lines.Add('Framing error');
    comEvtOverrun:
      FMemoRecv.Lines.Add('Overrun error');
    comEvtRxOver:
      FMemoRecv.Lines.Add('RX buffer overflow');
    comEvtParity:
      FMemoRecv.Lines.Add('Parity error');
    comEvtTxFull:
      FMemoRecv.Lines.Add('TX buffer full');
  end;
  UpdateStatus;
end;


constructor TMainForm.Create(AOwner: TComponent);
begin
  inherited CreateNew(AOwner);

  Caption     := 'KPComm Test';
  Width       := 500;
  Height      := 380;
  BorderStyle := bsSingle;

  { Serial component }
  FComm := TKPComm.Create(Self);
  FComm.OnComm := CommEvent;

  { Row 1: Port and Settings }
  FLabelPort := TLabel.Create(Self);
  FLabelPort.Parent  := Self;
  FLabelPort.Left    := 8;
  FLabelPort.Top     := 12;
  FLabelPort.Caption := 'Port:';

  FEditPort := TEdit.Create(Self);
  FEditPort.Parent := Self;
  FEditPort.Left   := 44;
  FEditPort.Top    := 8;
  FEditPort.Width  := 32;
  FEditPort.Text   := '1';

  FLabelSettings := TLabel.Create(Self);
  FLabelSettings.Parent  := Self;
  FLabelSettings.Left    := 88;
  FLabelSettings.Top     := 12;
  FLabelSettings.Caption := 'Settings:';

  FEditSettings := TEdit.Create(Self);
  FEditSettings.Parent := Self;
  FEditSettings.Left   := 148;
  FEditSettings.Top    := 8;
  FEditSettings.Width  := 140;
  FEditSettings.Text   := '9600,N,8,1';

  { Row 2: Open/Close buttons and status }
  FBtnOpen := TButton.Create(Self);
  FBtnOpen.Parent  := Self;
  FBtnOpen.Left    := 8;
  FBtnOpen.Top     := 38;
  FBtnOpen.Width   := 65;
  FBtnOpen.Height  := 25;
  FBtnOpen.Caption := 'Open';
  FBtnOpen.OnClick := BtnOpenClick;

  FBtnClose := TButton.Create(Self);
  FBtnClose.Parent  := Self;
  FBtnClose.Left    := 80;
  FBtnClose.Top     := 38;
  FBtnClose.Width   := 65;
  FBtnClose.Height  := 25;
  FBtnClose.Caption := 'Close';
  FBtnClose.Enabled := False;
  FBtnClose.OnClick := BtnCloseClick;

  FLabelStatus := TLabel.Create(Self);
  FLabelStatus.Parent  := Self;
  FLabelStatus.Left    := 160;
  FLabelStatus.Top     := 44;
  FLabelStatus.Caption := 'Closed';

  { Receive area }
  FLabelRecv := TLabel.Create(Self);
  FLabelRecv.Parent  := Self;
  FLabelRecv.Left    := 8;
  FLabelRecv.Top     := 70;
  FLabelRecv.Caption := 'Received:';

  FMemoRecv := TMemo.Create(Self);
  FMemoRecv.Parent     := Self;
  FMemoRecv.Left       := 8;
  FMemoRecv.Top        := 86;
  FMemoRecv.Width      := 476;
  FMemoRecv.Height     := 186;
  FMemoRecv.ScrollBars := ssVertical;
  FMemoRecv.ReadOnly   := True;

  { Send row }
  FEditSend := TEdit.Create(Self);
  FEditSend.Parent := Self;
  FEditSend.Left   := 8;
  FEditSend.Top    := 280;
  FEditSend.Width  := 400;

  FBtnSend := TButton.Create(Self);
  FBtnSend.Parent  := Self;
  FBtnSend.Left    := 416;
  FBtnSend.Top     := 280;
  FBtnSend.Width   := 65;
  FBtnSend.Height  := 25;
  FBtnSend.Caption := 'Send';
  FBtnSend.Enabled := False;
  FBtnSend.OnClick := BtnSendClick;

  { Status info line }
  FLabelInfo := TLabel.Create(Self);
  FLabelInfo.Parent  := Self;
  FLabelInfo.Left    := 8;
  FLabelInfo.Top     := 316;
  FLabelInfo.Width   := 476;
  FLabelInfo.Caption := 'RX: 0  TX: 0  Event: 0';
end;


procedure TMainForm.UpdateStatus;
var
  S: string;
begin
  if FComm.PortOpen then
    FLabelStatus.Caption := 'Open'
  else
    FLabelStatus.Caption := 'Closed';

  FBtnOpen.Enabled  := not FComm.PortOpen;
  FBtnClose.Enabled := FComm.PortOpen;
  FBtnSend.Enabled  := FComm.PortOpen;
  FEditSend.Enabled := FComm.PortOpen;

  S := 'RX: ' + IntToStr(FComm.InBufferCount) +
       '  TX: ' + IntToStr(FComm.OutBufferCount);
  if FComm.PortOpen then
  begin
    if FComm.CTSHolding then
      S := S + '  CTS: On'
    else
      S := S + '  CTS: Off';
    if FComm.DSRHolding then
      S := S + '  DSR: On'
    else
      S := S + '  DSR: Off';
    if FComm.CDHolding then
      S := S + '  CD: On'
    else
      S := S + '  CD: Off';
  end;
  S := S + '  Event: ' + IntToStr(FComm.CommEvent);
  FLabelInfo.Caption := S;
end;


end.