reveivecom.pas

串行口接收数据的程序.可以设置波特率,选择串行口.

unit reveivecom;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, OleCtrls, MSCommLib_TLB, ExtCtrls;

type
  TForm1 = class(TForm)
    GroupBox1: TGroupBox;
    RadioButton1: TRadioButton;
    RadioButton2: TRadioButton;
    GroupBox2: TGroupBox;
    ComboBox1: TComboBox;
    Memo1: TMemo;
    Button2: TButton;
    Button3: TButton;
    MSComm1: TMSComm;
    Label1: TLabel;
    procedure Button3Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure mscomm1comm(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button3Click(Sender: TObject);
begin
   mscomm1.PortOpen :=false;
   mscomm1.DTREnable :=false;
   mscomm1.RTSEnable :=false;

   close;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
mscomm1.InBufferCount :=0;
mscomm1.InputLen :=0;
mscomm1.RThreshold :=1;
mscomm1.SThreshold :=1;

mscomm1.Settings :=combobox1.Text ;
if radiobutton1.Checked =true then
   begin
      mscomm1.CommPort :=1;
   end
else
   mscomm1.CommPort :=2;
mscomm1.PortOpen :=true;
mscomm1.DTREnable :=true;
mscomm1.RTSEnable :=true;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
if mscomm1.PortOpen =true then
   begin
      mscomm1.PortOpen :=false;
      mscomm1.DTREnable :=false;
      mscomm1.RTSEnable :=false;
   end;
mscomm1.Settings :=combobox1.Text ;
if radiobutton1.Checked =true then
   begin
      mscomm1.CommPort :=1;
   end
else
   mscomm1.CommPort :=2;
mscomm1.PortOpen :=true;
mscomm1.DTREnable :=true;
mscomm1.RTSEnable :=true;
end;

procedure TForm1.mscomm1comm(Sender: TObject);
var
  str1:olevariant;
  s1:string;
begin
if mscomm1.CommEvent =2 then
   begin
      str1:=mscomm1.Input ;
      label1.Caption :=str1;
      s1:=copy(str1,1,8);
      memo1.Text :=memo1.Text +str1 ;
   end;
end;

end.