請教各位前輩  

unit Unit1;    interface    uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, SPComm, StdCtrls;    type
  TForm1 = class(TForm)
    Button1: TButton;
    Comm1: TComm;
    Memo1: TMemo;
    Memo2: TMemo;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    procedure Comm1ReceiveData(Sender: TObject; Buffer: Pointer;
      BufferLength: Word);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;    var
  Form1: TForm1;
  viewstring:string;
  i:integer;
  rbuf,sbuf:array[1..16] of byte;    implementation    {$R *.dfm}    procedure senddata;
var
  i:integer;
  commflg:boolean;
begin
  viewstring:='' ;
  commflg:=true;
  Form1.comm1.writecommdata(Chr(16)   'T'   '1'  Chr(13),1);
  sleep(2);
  Form1.comm1.writecommdata(chr(19) '12' chr(13),1);
  sleep(2);
  Form1.comm1.writecommdata('?' Chr(13),1);//『？』為送卡和讀卡 ，不知為何沒反應
  sleep(2);
  viewstring:= '發送'  viewstring;
  Form1.Memo1.lines.add(viewstring);
  Form1.Memo1.lines.add('');
  if not commflg then messagedlg('發送失敗 !' ,mterror,[mbyes],0);
end;    procedure TForm1.Comm1ReceiveData(Sender: TObject; Buffer: Pointer;
  BufferLength: Word);
var
  i:integer;
begin
  viewstring:='' ;      move(buffer^,pchar(@rbuf)^,bufferlength);
  for i:=1 to bufferlength do
    viewstring:=viewstring  inttohex(rbuf[i],bufferlength) '' ;      viewstring:='接收'  viewstring;
  memo2.lines.add(viewstring);
  memo2.lines.add('');
end;    procedure TForm1.Button1Click(Sender: TObject);
begin
  comm1.StopComm;
  comm1.StartComm;
  Memo1.Lines.Clear;
  Memo2.Lines.Clear;
end;    procedure TForm1.Button2Click(Sender: TObject);
begin
  comm1.StopComm;
end;    procedure TForm1.Button3Click(Sender: TObject);
begin
  senddata;//調用發送函數
end;    end. 

//================補充一下元件設定 object Comm1: TComm CommName = 'COM1' BaudRate = 19200 ParityCheck = False Outx_CtsFlow = False Outx_DsrFlow = False DtrControl = DtrEnable DsrSensitivity = False TxContinueOnXoff = True Outx_XonXoffFlow = True Inx_XonXoffFlow = True ReplaceWhenParityError = False IgnoreNullChar = False RtsControl = RtsEnable XonLimit = 500 XoffLimit = 500 ByteSize = _7 Parity = None StopBits = _1 XonChar = #17 XoffChar = #19 ReplacedChar = #0 ReadIntervalTimeout = 100 ReadTotalTimeoutMultiplier = 0 ReadTotalTimeoutConstant = 0 WriteTotalTimeoutMultiplier = 0 WriteTotalTimeoutConstant = 0 OnReceiveData = Comm1ReceiveData Left = 392 Top = 8 end ~~應無所住而生其心~~ 發表人 - Terrychen 於 2004/07/14 18:22:40

如果硬體介面沒問題ㄉ話,建議你從 1.commflg:=true;   Form1.comm1.writecommdata(Chr(16) + 'T' + '1' +Chr(13),1);   sleep(2);<--時間調長一點 0.002秒 有點短   Form1.comm1.writecommdata(chr(19)+'12'+chr(13),1);   sleep(2);   Form1.comm1.writecommdata('?'+Chr(13),1);//『？』為送卡和讀卡 ，不知為何沒反應   sleep(2); 2.PC 端與讀卡機ㄉ間溝通ㄉ協定 是不是有問題,一般CMD對ㄉ話 理論是是可以溝通ㄉ,怕ㄉ是DATA FORMATE 又要編碼過, 所以建議你在擬清PC與設備端ㄉ協定問題

感謝回應 不知為何小弟用SPcomm沒反應 後來改用MSComm就可以了 然而後來遇到資料無法回傳的問題，如您所言將sleep調大後就ＯＫ ~~應無所住而生其心~~