使用TComPort
组件时,我在Delphi中访问串口时遇到问题。它无法完全发送数据,但有些数据会随机丢失,如下例所示:
061:1268:-108:16596:-462:239:-75:0.000000:0.000000
061:
061:1240:-84:16616:-425:235:-54:0.000000:0
。 061:1220:-96:16620:-418:224:-69:0.000000:0.000000:0.0055
061:1220:-72:16676:-420:246:-72:0.0
061:1100:-176:16688:-460:224:-45:0.000000:0.000000:0.0056
061:1164:-144:16676:-442:23
061:1272:-136:16456:-413:219:-84:0.000000:0.000000:0.0056
061:1096:-152:16616
061:1096:-140:16656:-427:235:-88:0.000000:0.000000:0.0056
061:1200:-1
061:1192:-84:16664:-447:228:-60:0.000000:0.000000:0.0055
061
061:1208:-116:16576:-421:233:-56:0.000000:0.000000
061:1208:-128:16584:-427:226:-94:0.000000:0.000000:0.0056
061:1172:-264:16560:-436:257:-72:0.000000:
061:1196:-200:16724:-428:234:-78:0.000000:0.000000:0.0056
正确的数据应包含10个值,如下所示:
061:1196:-200:16724:-428:234:-78:0.000000:0.000000:0.0056
请帮我解决这个问题。我是Delphi的初学者。
这是我的代码:
procedure TForm1.ComDataPacket1Packet(Sender: TObject; const Str: String);
begin
allData := allData + Str;
if Pos (#$A, allData) > 0 then
begin
awal := 1;
batas := Pos(':', allData);
Delete(allData, awal, batas);
//Data Gyroscope
awal := 1;
batas := Pos(':', allData);
gyroX := Copy(allData, awal, batas-1);
Delete(allData, awal, batas);
Label2.Caption := gyroX;
awal := 1;
batas := Pos(':', allData);
gyroY := Copy(allData, awal, batas-1);
Delete(allData, awal, batas);
Label3.Caption := gyroY;
awal := 1;
batas := Pos(':', allData);
gyroZ := Copy(allData, awal, batas-1);
Delete(allData, awal, batas);
Label4.Caption := gyroZ;
//Data Accelero
awal := 1;
batas := Pos(':', allData);
accX := Copy(allData, awal, batas-1);
Delete(allData, awal, batas);
Label6.Caption := accX;
awal := 1;
batas := Pos(':', allData);
accY := Copy(allData, awal, batas-1);
Delete(allData, awal, batas);
Label7.Caption := accY;
awal := 1;
batas := Pos(':', allData);
accZ := Copy(allData, awal, batas-1);
Delete(allData, 1, batas);
Label8.Caption := accZ;
//Data GPS
awal := 1;
batas := Pos(':', allData);
Lat := Copy(allData, awal, batas-1);
Delete(allData, awal, batas);
Label10.Caption := Lat;
awal := 1;
batas := Pos(':', allData);
Long := Copy(allData, awal, batas-1);
Delete(allData, awal, batas);
Label11.Caption := Long;
awal := 1;
palingAkhir := Pos(#$A, allData);
Alt := Copy(allData, awal, palingAkhir-1);
Delete(allData, awal, palingAkhir);
Label12.Caption := Alt;
//Showing to Memo
Memo1.Text := Memo1.Text + Str + #$D;
SendMessage(Memo1.Handle, EM_LINESCROLL, 0, Memo1.Lines.Count);
end
答案 0 :(得分:0)
我不知道数据包模式如何帮助您。尝试一种没有数据包的方法,制作OnRXChar事件处理程序。我假设您的数据包含结束标记字节$ A,没有开始标记。
var
Accumulator: AnsiString;
List: TStringList;
...
//OnCreate
List:= TStringList.Create;
List.Delimiter := ':';
//OnDestroy
List.Free;
procedure XXX.RXChar(Sender: TObject; Count: Integer);
var
s, DataStr: AnsiString;
APos: Integer;
begin
ComPort.ReadStr(s, Count);
Accumulator := Accumulator + s;
APos := Pos (#$A, Accumulator);
if APos > 0 then begin
DataStr := Copy(Accumulator, 1, APos - 1);
Delete(Accumulator, 1, APos);
Memo1.Lines.Add(DataStr);
List.DelimitedText := DataStr;
if List.Count = 10 then
TreatListItems; //extract data from List[]
end;
end;