spcomm接收数据代码应该怎么写？

Question

接收事件中：我原来的代码是这样var
  tmp:string;
begin
  move(buffer^,tmp,bufferlength);
  memo1.lines.add(tmp);
end;程序报错，请问我该怎么写？接收到的应该就是普通字符串
一般情况下是怎么写的啊？

Answer 1

Spcomm串口控件的例程
//串口初始化           procedure TForm1.BitBtn3Click(Sender: TObject);
            begin
               comm1.startcomm;
            end;
              //关闭串口
            procedure TForm1.BitBtn4Click(Sender: TObject);
            begin
               comm1.StopComm;
            end;
            //发送数据
            procedure TForm1.BitBtn1Click(Sender: TObject);{var str:string;
                ch1:char;
            begin
            comm1.WriteCommData(ch,1);
            end.
            //接收数据
            procedure TForm1.Comm1ReceiveData(Sender: TObject; Buffer: Pointer;
              BufferLength: Word);
            type   ss=array[1..500]of char ;
            var    str1:^ss;
                   i:integer;
                   s:array[0..15] of char ;
                   n:integer;
            begin
                   str1:=Buffer;
                 //s[]=('0','1','2','3'...'E')
                   for i:=0 to 9 do
                   s[i]:=chr(48+i);
                   for i:=10 to 15 do
                   s[i]:=chr(55+i);
                   for i:=1 to bufferlength do
                   begin
                   n:=ord(str1^[i]);
                   listbox1.Items.add(
                             inttostr(listbox1.Items.Count+1)
                             +' - '+s[n div 16]+s[n mod 16]);
                   end;
                   listbox1.Refresh;
                  if listbox1.Items.count > strtoint(form2.edit1.text)
                  then listbox1.Items.Clear;
            end;

Answer 2

var
  Recbuff:array of byte; setlength(Recbuff, BufferLength);
 move(buffer,recbuff, BufferLength);

Answer 3

procedure TForm1.Comm2ReceiveData(Sender: TObject; Buffer: Pointer;
  BufferLength: Word);
var
  str:string;
begin
  setlength(str,bufferlength);
  move(buffer^,pchar(str)^,bufferlength);
  memo1.Lines.Add(str);
end;