delphi TComport控件从串品读取数据

program ModTest;

{$APPTYPE CONSOLE}

uses

SysUtils,

CPort,

Windows,

SyncObjs;

var

ComPort: TComPort;

Events: TComEvents;

Answer, Data: string;

Step: Integer;

Event: TEvent;

function CtrlHandler(CtrlType: LongWord): Boolean;

begin

Event.SetEvent;

Result := True;

end;

begin

Event := TEvent.Create(nil, True, False, '');

SetConsoleCtrlHandler(@CtrlHandler, True);

try

ComPort := TComPort.Create(nil);

try

if ParamCount > 0 then

ComPort.Port := ParamStr(1)

else

ComPort.Port := 'COM1';

ComPort.Events := [];

ComPort.FlowControl.ControlDTR := dtrEnable;

ComPort.FlowControl.ControlRTS := rtsEnable;

ComPort.Open; // open port

ComPort.WriteStr('AT'#13#10); // send test command

Answer := '';

Step := 0;

repeat

Events := [evRxChar];

ComPort.WaitForEvent(Events, Event.Handle, 5000); // wait for charachters

if evRxChar in Events then

begin

ComPort.ReadStr(Data, ComPort.InputCount);

Answer := Answer + Data;

if Pos('OK', Answer) > 0 then

Break;

end;

Inc(Step)

until (Events = []) or (Step = 20);

if Pos('OK', Answer) > 0 then

WriteLn('Modem found on ' + ComPort.Port)

else

WriteLn('Modem NOT found on ' + ComPort.Port);

finally

ComPort.Free;

end;

except

on E: Exception do

WriteLn('Error: ' + E.Message);

end;

Event.Free;

end.

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