unit1.~pas

通过串口直接发送文件的例子

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    txtReceive: TEdit;
    Button1: TButton;
    OpenDialog1: TOpenDialog;
    txtTransfer: TEdit;
    Button2: TButton;
    GroupBox1: TGroupBox;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    txtSize: TEdit;
    txtName: TEdit;
    txtLen: TEdit;
    Button3: TButton;
    rdCOM: TRadioGroup;
    btnOpenPort: TButton;
    ComboBox1: TComboBox;
    Label4: TLabel;
    Edit1: TEdit;
    Button4: TButton;
    Term: TMemo;
    Function  PortSet():Boolean;
    Procedure RefreshStatus(SxLen:LongInt; SfLen:LongInt; SFname:PChar);
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure btnOpenPortClick(Sender: TObject);
    procedure Button4Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation
   uses FtProc,PComm;//声明

{$R *.DFM}

procedure TForm1.Button2Click(Sender: TObject);
begin
  if not OpenDialog1.Execute then exit;
  lstrcpy(GxFname,PChar(OpenDialog1.FileName));
  txtTransfer.Text := OpenDialog1.FileName;
  //指定各项须使用的变量
  GftCancel := False;
  GProtocol := Combobox1.ItemIndex;
  GDirection := FT_XMIT; //指定传输的动作
  TFtProc.Create(false); //线程建立并执行
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  GftCancel := False;
  GProtocol := Combobox1.ItemIndex;
  GDirection := FT_RECV; //指定接收的动作
  TFtProc.Create(false); //线程建立并执行
end;

//以下是状态显示的回调函数
Procedure TForm1.RefreshStatus(SxLen:LongInt; SfLen:LongInt; SFname:PChar);
begin
  //文件大小
  txtSize.Text := IntToStr(SfLen);
  //文件名称
  txtName.Text := StrPas(SFName);
  //已传输的文件位元组数
  txtLen.Text := IntToStr(SxLen);
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  sio_Close(Port);
  //关闭程序
Application.Terminate;
end;

procedure TForm1.btnOpenPortClick(Sender: TObject);
var
 Ret:Integer;
begin
 //开启通讯端口
 Port := rdCom.ItemIndex+1;  //指定通讯端口
 Ret := sio_Open(Port);
  If ret <> SIO_OK Then
   begin
     ShowMessage('打开通讯端口错误');
     sio_close (Port);
     Exit;
   end;
   If Not PortSet() Then   //参数设定
   begin
     sio_close(Port);
     ShowMessage('通讯端口参数设定发生错误');
     Exit;
   End;
    //降低DTR及RTS的电压
    ret := sio_DTR(Port, 0);
    ret := sio_RTS(Port, 0);

end;

//以下是通讯参数的函数实现
Function TForm1.PortSet():Boolean;
var
   mode,Hw,Sw,ret:LongInt;
begin
//参数设定副程序
{Baud rate 115200
Data 8 bit
Parity none
Stop 1 bit
Flow control hardware  //需要流控制
Character pacing 0 ms
Line pacing 0 ms
}
    mode := P_NONE Or BIT_8 Or STOP_1;
    Hw := 0 ;   //没有硬件流量控制
    Sw := 0 ;  //没有软件流量控制
    Result := False ;
    //指定必要的参数
    ret := sio_ioctl(Port, B115200, mode); //Setting
    If ret <> SIO_OK Then
     begin
        ShowMessage('设定时发生错误');
        Exit;
     end;
    //设定流量控制
    ret := sio_flowctrl(Port, Hw or Sw); //Flow Control
    If ret <> SIO_OK Then
      begin
        ShowMessage('流量设定时发生错误');
        Exit;
      end;
    Result := True;
End;

procedure TForm1.Button4Click(Sender: TObject);
var s: string;
    i: integer;
begin
s:='abcdefg';
for i := 1 to length(s) do
begin
  sio_putch(1,Integer(s[i]));
end;

end;

end.