| 1 | unit CommMark;
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| 2 |
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| 3 | interface
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| 4 |
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| 5 | uses
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| 6 | Classes, SysUtils, CommPin, SpecializedList;
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| 7 |
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| 8 | type
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| 9 |
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| 10 | { TCommMark }
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| 11 |
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| 12 | TCommMark = class(TCommNode)
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| 13 | private
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| 14 | FMarkIndex: Integer;
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| 15 | FFrameData: TListByte;
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| 16 | procedure RawDataReceive(Sender: TCommPin; Stream: TListByte);
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| 17 | procedure RawSetStatus(Sender: TCommPin; Status: Integer);
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| 18 | procedure FrameDataReceive(Sender: TCommPin; Stream: TListByte);
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| 19 | procedure FrameSetStatus(Sender: TCommPin; Status: Integer);
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| 20 | protected
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| 21 | procedure SetActive(const AValue: Boolean); override;
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| 22 | public
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| 23 | PinRaw: TCommPin;
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| 24 | PinFrame: TCommPin;
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| 25 | Mark: TListByte;
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| 26 | procedure Reset;
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| 27 | constructor Create(AOwner: TComponent); override;
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| 28 | destructor Destroy; override;
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| 29 | end;
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| 30 |
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| 31 | implementation
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| 32 |
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| 33 | { TCommMark }
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| 34 |
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| 35 | procedure TCommMark.RawDataReceive(Sender: TCommPin; Stream: TListByte);
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| 36 | var
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| 37 | I: Integer;
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| 38 | begin
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| 39 | for I := 0 to Stream.Count - 1 do
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| 40 | if (Mark.Count > 0) and (Stream[I] = Mark[FMarkIndex]) then begin
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| 41 | Inc(FMarkIndex);
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| 42 | if FMarkIndex >= Mark.Count then begin
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| 43 | PinFrame.Send(FFrameData);
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| 44 | FFrameData.Count := 0;
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| 45 | FMarkIndex := 0;
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| 46 | end;
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| 47 | end else begin
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| 48 | FFrameData.Count := FFrameData.Count + 1;
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| 49 | FFrameData[FFrameData.Count - 1] := Stream[I];
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| 50 | FMarkIndex := 0;
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| 51 | if Mark.Count = 0 then begin
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| 52 | PinFrame.Send(FFrameData);
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| 53 | FFrameData.Count := 0;
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| 54 | end;
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| 55 | end;
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| 56 | end;
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| 57 |
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| 58 | procedure TCommMark.RawSetStatus(Sender: TCommPin; Status: Integer);
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| 59 | begin
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| 60 | PinFrame.Status := Status;
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| 61 | end;
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| 62 |
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| 63 | procedure TCommMark.FrameDataReceive(Sender: TCommPin; Stream: TListByte);
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| 64 | begin
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| 65 | PinRaw.Send(Stream);
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| 66 | PinRaw.Send(Mark);
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| 67 | end;
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| 68 |
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| 69 | procedure TCommMark.FrameSetStatus(Sender: TCommPin; Status: Integer);
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| 70 | begin
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| 71 | PinRaw.Status := Status;
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| 72 | end;
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| 73 |
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| 74 | procedure TCommMark.SetActive(const AValue: Boolean);
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| 75 | begin
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| 76 | if FActive = AValue then Exit;
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| 77 | FActive := AValue;
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| 78 | if FActive then Reset;
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| 79 | inherited;
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| 80 | end;
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| 81 |
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| 82 | procedure TCommMark.Reset;
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| 83 | begin
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| 84 | FMarkIndex := 0;
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| 85 | FFrameData.Clear;
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| 86 | end;
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| 87 |
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| 88 | constructor TCommMark.Create(AOwner: TComponent);
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| 89 | begin
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| 90 | inherited;
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| 91 | PinRaw := TCommPin.Create;
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| 92 | PinRaw.OnReceive := RawDataReceive;
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| 93 | PinRaw.OnSetSatus := RawSetStatus;
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| 94 | PinRaw.Node := Self;
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| 95 | PinFrame := TCommPin.Create;
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| 96 | PinFrame.OnReceive := FrameDataReceive;
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| 97 | PinFrame.OnSetSatus := FrameSetStatus;
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| 98 | PinFrame.Node := Self;
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| 99 | Mark := TListByte.Create;
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| 100 | FMarkIndex := 0;
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| 101 | FFrameData := TListByte.Create;
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| 102 | end;
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| 103 |
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| 104 | destructor TCommMark.Destroy;
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| 105 | begin
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| 106 | FreeAndNil(FFrameData);
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| 107 | FreeAndNil(Mark);
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| 108 | FreeAndNil(PinRaw);
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| 109 | FreeAndNil(PinFrame);
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| 110 | inherited;
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| 111 | end;
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| 112 |
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| 113 | end.
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| 114 |
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