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读取com口接收byte数据的处理

 1 procedure Tfrm_CheckCloth.cnrs232ReceiveData(Sender: TObject; Buffer: Pointer;
 2   BufferLength: Word);
 3   var
 4     MyRcvData:Array[0..8] of byte;
 5     ChkStr:string;
 6     tmp : Integer;
 7 begin
 8      move(buffer^,pchar(@MyRcvData)^,8);
 9     //  ChkStr :=  inttostr(MyRcvData[3]*256 +MyRcvData[4]) + inttostr(MyRcvData[5]*256 +MyRcvData[6]);
10     ChkStr := Format('%0.2x%0.2x%0.2x%0.2x', [MyRcvData[3], MyRcvData[4],MyRcvData[5],MyRcvData[6]]);
11      try
12        tmp := strtoint('$'+ChkStr);
13      except
14        tmp := 0;
15      end;
16      GetRS232DateLen :=Format( '%.2f',[(tmp)/1000]);
17  end;

烟台一码表厂的码表:

通讯举例:仪表地址假设为1

读取当前显示值(假设当前显示值为1000)

上位机发送(HEX)   01 03 00 14 00 02 84 0F

仪表回应(HEX):   01 03 04 00 00 03 E8 FA 8D

红字表示码表数值。

posted on 2014-01-08 12:05  USEGEAR  阅读(698)  评论(0编辑  收藏  举报