getevent.pas

16 relay output channels and 16 isolated digital input channels LED indicators to show activated

unit GetEvent;

interface

uses
  Classes, Windows, Driver;

type
  TGetEvent = class(TThread)
  private
    { Private declarations }
  protected
    procedure Execute; override;

    procedure adInterruptEvent;
    procedure adBufChangeEvent;
    procedure adOverrunEvent;
    procedure adTerminateEvent;
  end;

implementation
uses Main;

{ Important: Methods and properties of objects in VCL or CLX can only be used
  in a method called using Synchronize, for example,

      Synchronize(UpdateCaption);

  and UpdateCaption could look like,

    procedure TGetEvent.UpdateCaption;
    begin
      Form1.Caption := 'Updated in a thread';
    end; }

{ TGetEvent }

procedure TGetEvent.Execute;
var
  usEventType: SHORT;
  ptCheckEvent: PT_CheckEvent;   { Check event }
begin
  { Place thread code here }
  while (bThreadloop) do
  begin
    { Check message }
    with ptCheckEvent do
    begin
      EventType := @usEventType;
      Milliseconds := 100;
    end;

    bThreadflag := TRUE;
    DRV_CheckEvent(DriverHandle, ptCheckEvent);

    { Process interrupt event } 
    if (usEventType and ADS_EVT_INTERRUPT <> 0) then
      adInterruptEvent();

    { Process buffer change event }
    if (usEventType and ADS_EVT_BUFCHANGE <> 0) then
      adBufChangeEvent();

    { Process terminate event }
    if (usEventType = ADS_EVT_TERMINATED ) then
      adTerminateEvent();

    { Process overrun event }
    if (usEventType and ADS_EVT_OVERRUN <> 0) then
      adOverrunEvent();

    bThreadflag := FALSE;
  end;
end;

procedure TGetEvent.adInterruptEvent();
begin
  exit;
end;

procedure TGetEvent.adBufChangeEvent();
begin
  exit;
end;

procedure TGetEvent.adOverrunEvent();
begin
  exit;
end;

procedure TGetEvent.adTerminateEvent();
begin
  bThreadloop := FALSE;

  { Disable stop button }
  FrmMain.Stop.Enabled := FALSE;
  
  exit;
end;

end.