Club Amiga de Montreal - CAM/CAM_CD_1.iso/files/502b.lha/PCQ_v1.2/PCQ_Examples/examples.LZH/Examples/SmallCom.p

Text File | 1991-02-09 | 10.1 KB | 463 lines

Program SmallCom;

{
    This program is a simplistic terminal program, which has
basically no features, but works reasonably well.  It is an ANSI
compatible terminal to the extent that the console.device is - it
simply passes incoming data, from the keyboard or the serial device,
to the console device.

    To gain some control over the program, you might want to take a look
at the translated characters (after the call to DeadKeyConvert), and
process a few (function keys, for example) instead of sending them on
to the console.device.
}

{$I "Include:Exec/Interrupts.i"}
{$I "Include:Exec/Libraries.i"}
{$I "Include:Exec/Ports.i"}
{$I "Include:Exec/IO.i"}
{$I "Include:Exec/Devices.i"}
{$I "Include:Devices/Console.i"}
{$I "Include:Utils/IOUtils.i"}
{$I "Include:Utils/ConsoleIO.i"}
{$I "Include:Intuition/Intuition.i"}
{$I "Include:Devices/InputEvent.i"}
{$I "Include:Utils/DeadKeyConvert.i"}
{$I "Include:Utils/BuildMenu.i"}
{$I "Include:Devices/Serial.i"}
{$I "Include:Exec/Memory.i"}
{$I "Include:Utils/StringLib.i"}


Type
    ParityType = (no_parity, even_parity, odd_parity);

Const
    w        : WindowPtr = Nil;
    SerialWrite    : IOExtSerPtr = Nil;
    SerialRead    : IOExtSerPtr = Nil;
    ConsoleWrite : IOStdReqPtr = Nil;

    WritingConsole    : Boolean = False;
    WritingSerial    : Boolean = False;

    SerialSendBuffer    : String = Nil;
    ConsoleSendBuffer    : String = Nil;
    SerialReceiveBuffer : String = Nil;
    TranslateBuffer    : String = Nil;

    BaudRate    : Integer = 2400;
    DataBits    : Byte = 8;
    Parity    : ParityType = no_parity;
    StopBits    : Byte = 1;
    HalfDuplex    : Boolean = False;

    QuitStopDie    : Boolean = False;

    BaudRates    : Array [0..5] of Integer = (300, 1200, 2400,
                         4800, 9600, 19200);

var
    IMessage    : IntuiMessage;
    Msg        : MessagePtr;
    TitleBuffer : Array [0..79] of Char;

Procedure MakeWindowTitle;
var
    TitlePtr : String;
    NumBuff  : Array [0..79] of Char;
    Error    : Integer;
begin
    TitlePtr := Adr(TitleBuffer);
    strcpy(TitlePtr, "SmallCom     ");
    Error := IntToStr(Adr(NumBuff), BaudRate);
    strcat(TitlePtr, Adr(NumBuff));
    NumBuff[0] := ' ';
    NumBuff[1] := Chr(DataBits + 48);
    case Parity of
      no_parity    : NumBuff[2] := 'N';
      even_parity : NumBuff[2] := 'E';
      odd_parity  : NumBuff[2] := 'O';
    end;
    NumBuff[3] := Chr(StopBits + 48);
    NumBuff[4] := '\0';
    strcat(TitlePtr, Adr(NumBuff));
    SetWindowTitles(w, TitlePtr, Nil);
end;

Function OpenTheWindow : Boolean;
var
    nw : NewWindowPtr;
begin
    new(nw);
    with nw^ do begin
    LeftEdge := 0;
    TopEdge := 0;
    Width := 320;
    Height := 200;

    DetailPen := -1;
    BlockPen  := -1;
    IDCMPFlags := RAWKEY_f + MENUPICK_f + CLOSEWINDOW_f;
    Flags := SMART_REFRESH + ACTIVATE + WINDOWSIZING + WINDOWDRAG +
            WINDOWDEPTH + WINDOWCLOSE + SIZEBBOTTOM;
    FirstGadget := Nil;
    CheckMark := Nil;
    Title := "";
    Screen := Nil;
    BitMap := Nil;
    MinWidth := 0;
    MaxWidth := -1;
    MinHeight := 0;
    MaxHeight := -1;
    WType := WBENCHSCREEN_f;
    end;

    w := OpenWindow(nw);
    dispose(nw);
    OpenTheWindow := w <> nil;
end;

Procedure AddTheMenus;
begin
    InitializeMenu(w);
    NewMenu("Project");
    NewItem("Quit",'Q');
    NewMenu("Serial");

    NewItem("Baud Rate",'\0');
    NewSubItem("  300", '1');
    NewSubItem(" 1200", '2');
    NewSubItem(" 2400", '3');
    NewSubItem(" 4800", '4');
    NewSubItem(" 9600", '5');
    NewSubItem("19200", '6');

    NewItem("Data Size", '\0');
    NewSubItem("7N2", '\0');
    NewSubItem("7E1", '\0');
    NewSubItem("7O1", '\0');
    NewSubItem("8N1", '\0');

    NewItem("Duplex   ", '\0');
    NewSubItem("Half", 'H');
    NewSubItem("Full", 'F');

    AttachMenu;
end;


Function CreateExtIO(ioReplyPort : MsgPortPtr; Size : Integer) : Address;
var
    Request : IOStdReqPtr;
begin
    if ioReplyPort = Nil then
    CreateExtIO := Nil;

    Request := AllocMem(Size, MEMF_CLEAR + MEMF_PUBLIC);
    if Request = Nil then
    CreateExtIO := Nil;

    with Request^.io_Message.mn_Node do begin
    ln_Type := NTMessage;
    ln_Pri := 0;
    end;
    Request^.io_Message.mn_ReplyPort := ioReplyPort;
    CreateExtIO := Request;
end;


Procedure DeleteExtIO(Request : Address; Size : Integer);
var
    Req : IOStdReqPtr;
begin
    Req := Request;
    with Req^ do begin
    io_Message.mn_Node.ln_Type := NodeType($FF);
    io_Device := Address(-1);
    io_Unit := Address(-1);
    end;
    FreeMem(Request, Size);
end;


Procedure Die;
var
    Error : Integer;
begin
    if SerialWrite <> Nil then begin
    if CheckIO(SerialRead) = Nil then begin
        Error := AbortIO(SerialRead);
        Error := WaitIO(SerialRead);
    end;
    CloseDevice(SerialWrite);
    DeleteExtIO(SerialWrite, SizeOf(IOExtSer));
    if SerialRead <> Nil then
        DeleteExtIO(SerialRead, SizeOf(IOExtSer));
    end;

    if ConsoleWrite <> Nil then begin
    CloseDevice(ConsoleWrite);
    DeleteStdIO(ConsoleWrite);
    end;
    if w <> Nil then begin
    DetachMenu;
    Forbid;
    while GetMsg(w^.UserPort) <> Nil do;
    Permit;
    CloseWindow(w);
    end;
    Exit(0);
end;

Procedure SendSerial(IO : IOExtSerPtr; Data : Address; Size : Integer);
var
    Error : Short;
begin
    with IO^.IOSer do begin
    io_Data := Data;
    io_Length := Size;
    io_Command := CMD_WRITE;
    end;
    Error := DoIO(IO);
end;

Procedure QueueSerialRead;
var
    Waiting : Integer;
begin
    with SerialRead^.IOSer do begin
    io_Command := SDCMD_QUERY;
    Waiting := DoIO(SerialRead);
    Waiting := io_Actual;
    if Waiting = 0 then
        Waiting := 1
    else if Waiting > 80 then
        Waiting := 80;
    io_Length := Waiting;
    io_Command := CMD_READ;
    io_Data := SerialReceiveBuffer;
    end;
    SendIO(SerialRead);
end;


Procedure SetSerialParams;
var
    Error : Short;
begin
    with SerialWrite^ do begin
    io_ReadLen    := DataBits;
    io_BrkTime    := 750000;
    io_Baud        := BaudRate;
    io_WriteLen    := DataBits;
    io_StopBits    := StopBits;
    io_RBufLen    := 4000;
    io_TermArray.TermArray0 := $51040303;
    io_TermArray.TermArray1 := $03030303;
    io_CtlChar    := SER_DEFAULT_CTLCHAR;
    case parity of
      no_parity    : io_SerFlags := 0;
      even_parity    : io_SerFlags := SERF_PARTY_ON;
      odd_parity    : io_SerFlags := SERF_PARTY_ON + SERF_PARTY_ODD;
    end;
    IOSer.io_Command := SDCMD_SETPARAMS;
    end;
    if CheckIO(SerialRead) = Nil then begin
    Error := AbortIO(SerialRead);
    Error := WaitIO(SerialRead);
    end;
    Error := DoIO(SerialWrite);
    QueueSerialRead;
    MakeWindowTitle;
end;


Function OpenSerialDevice : Boolean;
var
    Error : Short;
begin
    SerialWrite := CreateExtIO(w^.UserPort, SizeOf(IOExtSer));
    if SerialWrite = Nil then
    OpenSerialDevice := False;
    SerialRead := CreateExtIO(w^.UserPort, SizeOf(IOExtSer));
    if SerialWrite = Nil then begin
    DeleteExtIO(SerialWrite, SizeOf(IOExtSer));
    SerialWrite := Nil;
    OpenSerialDevice := False;
    end;

    with SerialWrite^ do begin
    io_ReadLen    := DataBits;
    io_BrkTime    := 750000;
    io_Baud        := BaudRate;
    io_WriteLen    := DataBits;
    io_StopBits    := StopBits;
    io_RBufLen    := 4000;
    io_SerFlags    := 0;
    io_SerFlags    := 0;
    end;

    Error := OpenDevice("serial.device", 0, SerialWrite, 0);

    if Error = 0 then begin
    SerialRead^ := SerialWrite^;
    QueueSerialRead;
    SetSerialParams;
    OpenSerialDevice := True;
    end else begin
    DeleteExtIO(SerialWrite, SizeOf(IOExtSer));
    DeleteExtIO(SerialRead, SizeOf(IOExtSer));
    SerialWrite := Nil;
    OpenSerialDevice := False;
    end;
end;


Function OpenConsoleDevice : Boolean;
var
    Error : Short;
begin
    ConsoleWrite := CreateStdIO(w^.UserPort);
    if ConsoleWrite = Nil then
    OpenConsoleDevice := False;

    with ConsoleWrite^ do begin
    io_Data := w;
    io_Length := SizeOf(Window);
    end;

    Error := OpenDevice("console.device", 0, ConsoleWrite, 0);
    if Error = 0 then
    ConsoleBase := ConsoleWrite^.io_Device
    else
    DeleteStdIO(ConsoleWrite);
    OpenConsoleDevice := Error = 0;
end;


Procedure OpenEverything;
begin
    SerialSendBuffer    := AllocString(80);
    ConsoleSendBuffer    := AllocString(80);
    SerialReceiveBuffer := AllocString(80);
    TranslateBuffer    := AllocString(80);

    if not OpenTheWindow then
    Die;

    AddTheMenus;

    if not OpenConsoleDevice then
    Die;

    if not OpenSerialDevice then
    Die;
end;


Procedure ProcessIntuitionMsg;
var
    IMessage    : IntuiMessage;
    IPtr    : IntuiMessagePtr;

    Procedure ProcessMenu;
    var
    MenuNumber    : Short;
    ItemNumber    : Short;
    SubItemNumber    : Short;
    begin
    if IMessage.Code = MENUNULL then
        return;

    MenuNumber := MenuNum(IMessage.Code);
    ItemNumber := ItemNum(IMessage.Code);
    SubItemNumber := SubNum(IMessage.Code);

    case MenuNumber of
      0 : if ItemNumber = 0 then
         QuitStopDie := True;
      1 : begin
          case ItemNumber of
            0 : BaudRate := BaudRates[SubItemNumber];
            1 : case SubItemNumber of
              0 : begin
                  DataBits := 7;
                  Parity   := no_parity;
                  StopBits := 2;
                  end;
              1 : begin
                  DataBits := 7;
                  Parity   := even_parity;
                  StopBits := 1;
                  end;
              2 : begin
                  DataBits := 7;
                  Parity   := odd_parity;
                  StopBits := 1;
                  end;
              3 : begin
                  DataBits := 8;
                  Parity   := no_parity;
                  StopBits := 1;
                  end;
            end;
            2 : HalfDuplex := SubItemNumber = 0;
          end;
          if ItemNumber < 2 then
              SetSerialParams;
          end;
    end;
    end;


    Procedure ProcessKeypress;
    var
    Length    : Short;
    Buffer    : Array [0..79] of Char;
    begin
    if IMessage.Code < 128 then begin
        Length := DeadKeyConvert(Adr(IMessage), TranslateBuffer, 79, Nil);
        if Length > 0 then begin
        if HalfDuplex then
            ConWrite(ConsoleWrite, TranslateBuffer, Length);
        SendSerial(SerialWrite, TranslateBuffer, Length);
        end;
    end;
    end;

begin
    IPtr := IntuiMessagePtr(Msg);
    IMessage := IPtr^;
    ReplyMsg(Msg);

    case IMessage.Class of
      MENUPICK_f : ProcessMenu;
      RAWKEY_f   : ProcessKeypress;
      CLOSEWINDOW_f : QuitStopDie := True;
    end;
end;

Procedure ProcessSerialInput;
begin
    with SerialRead^.IOSer do begin
    if io_Actual > 0 then
        ConWrite(ConsoleWrite, SerialReceiveBuffer, io_Actual);
    end;
    QueueSerialRead;
end;

begin
    OpenEverything;
    repeat
    Msg := WaitPort(w^.UserPort);
    Msg := GetMsg(w^.UserPort);
    if Msg = MessagePtr(SerialRead) then
        ProcessSerialInput
    else
        ProcessIntuitionMsg;
    until QuitStopDie;
    Die;
end.