以下是完整的程序!!!
unit comm;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, SPComm;
type
TFCOMM = class(TForm)
Memo1: TMemo;
Button1: TButton;
Comm1: TComm;
procedure FormShow(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure Button1Click(Sender: TObject);
procedure Comm1ReceiveData(Sender: TObject; Buffer: Pointer;
BufferLength: Word);
private
{ Private declarations }
public
{ Public declarations }
end;
var
FCOMM: TFCOMM;
Viewstring:string;
i:integer;
rbuf,sbuf:array[1..6] of byte;
implementation
{$R *.dfm}
procedure TFCOMM.FormShow(Sender: TObject);
begin
comm1.StartComm;
end;
procedure TFCOMM.FormClose(Sender: TObject; var Action: TCloseAction);
begin
comm1.StopComm;
end;
procedure senddata;
var
i:integer;
commflg:boolean;
begin
viewstring:='';
commflg:=true;
for i:=1 to 6 do
begin
if not fcomm.comm1.writecommdata(@sbuf,1) then
begin
commflg:=false;
break;
end;
sleep(2); {发送时字节间的延时}
viewstring:=viewstring+inttohex(sbuf,2)+'';
end;
viewstring:='发送'+viewstring;
fcomm.memo1.lines.add(viewstring);
fcomm.memo1.lines.add('');
if not commflg then messagedlg('发送失败!',mterror,[mbyes],0);
end;
procedure TFCOMM.Button1Click(Sender: TObject);
begin
sbuf[1]:=byte($f0); {帧头}
sbuf[2]:=byte($01); {命令号}
sbuf[3]:=byte($ff);
sbuf[4]:=byte($ff);
sbuf[5]:=byte($01);
sbuf[6]:=byte($0f); {帧尾}
senddata;{调用发送函数}
end;
procedure TFCOMM.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,2)+' ';
viewstring:='接受'+viewstring;
memo1.lines.add(viewstring);
memo1.lines.add('');
end;
end.