基于SPCOMM控件。
源码：
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, SPComm, ExtCtrls;
type
TForm1 = class(TForm)
Comm1: TComm;
GroupBox1: TGroupBox;
go: TButton;
left: TButton;
right: TButton;
back: TButton;
left30: TButton;
right30: TButton;
yuan90: TButton;
yuan360: TButton;
GroupBox2: TGroupBox;
Label5: TLabel;
Label6: TLabel;
Label7: TLabel;
Memo4: TMemo;
Memo5: TMemo;
Memo6: TMemo;
GroupBox3: TGroupBox;
opencom: TButton;
lianjie: TButton;
xinxi: TMemo;
procedure SendHex(S: String);
procedure left30Click(Sender: TObject);
procedure opencomClick(Sender: TObject);
procedure goClick(Sender: TObject);
procedure backClick(Sender: TObject);
procedure CommReceiveData(Sender: TObject; Buffer: Pointer;
BufferLength: Word);
procedure leftClick(Sender: TObject);
procedure rightClick(Sender: TObject);
procedure w(Sender: TObject; var Key: Word; Shift: TShiftState);
procedure FormKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
procedure FormKeyUp(Sender: TObject; var Key: Word;
Shift: TShiftState);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
BUF: string;
implementation
{$R *.dfm}
function StrToHex(mStr:String;stlen:word):string;
var
I:Integer;
begin
Result:='';
for I := 1 to stlen do
begin
if mstr[i]=#0 then
Result:=Result+'00 '
else
Result:=Result+IntToHex(Ord(mStr[I]),2)+' ';
end;
end;
procedure TForm1.SendHex(S: String);
var
s2:string;
buf1:array[0..50000] of char;
i:integer;
begin
s2:='';
for i:=1 to length(s) do
begin
if ((copy(s,i,1)>='0') and (copy(s,i,1)<='9'))or((copy(s,i,1)>='a') and (copy(s,i,1)<='f'))
or((copy(s,i,1)>='A') and (copy(s,i,1)<='F')) then
begin
s2:=s2+copy(s,i,1);
end;
end;
for i:=0 to (length(s2) div 2-1) do
buf1[i]:=char(strtoint('$'+copy(s2,i*2+1,2)));
Comm1.WriteCommData(buf1,(length(s2) div 2));
end;
procedure TForm1.left30Click(Sender: TObject);
begin
SendHex('aa'); //发送十六进制
end;
procedure TForm1.opencomClick(Sender: TObject);
begin
buf:='0';
SendHex(buf);
if opencom.Caption = '打开端口' then
begin
Comm1.StartComm;
opencom.Caption := '关闭端口';
end
else //if Button1.Caption = '关闭串口' then
begin
Comm1.StopComm;
opencom.Caption := '打开端口';
end;
end;
procedure TForm1.goClick(Sender: TObject);
begin
buf:='11';
SendHex(buf);
end;
procedure TForm1.backClick(Sender: TObject);
begin
buf:='12';
SendHex(buf);
end;
procedure TForm1.leftClick(Sender: TObject);
begin
buf:='14';
SendHex(buf);
end;
procedure TForm1.rightClick(Sender: TObject);
begin
buf:='13';
SendHex(buf);
end;
procedure Tform1.CommReceiveData(Sender: TObject; Buffer: Pointer;
BufferLength: Word);
var
strRecv : string;
begin
setLength(strRecv,BufferLength);
Move(Buffer^,pchar(strRecv)^,BufferLength);
xinxi.Lines.Add('已收到：'+intTostr(BufferLength)+'字节的数据');
xinxi.Lines.Add(strRecv);
xinxi.Invalidate ;
end;
procedure TForm1.w(Sender: TObject; var Key: Word; Shift: TShiftState);
begin
buf:='11';
SendHex(buf);
end;
procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
begin
if Key=87 then
buf:='11';
SendHex(buf);
if Key=83 then
buf:='12';
SendHex(buf);
if Key=68 then
buf:='13';
SendHex(buf);
if Key=65 then
buf:='14';
SendHex(buf);
end;
procedure TForm1.FormKeyUp(Sender: TObject; var Key: Word;
Shift: TShiftState);
begin
if Key=87 then
SendHex('ff');
if Key=65 then
SendHex('ff');
if Key=68 then
SendHex('ff');
if Key=83 then
SendHex('ff');
end;
end.