Re: Port szeregowy, drukarka fiskalna znak NULL

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#334588

From: Przemyslaw Rokicki
Date: Fri, 06 Jan 2012 14:02

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On 6 Sty, 14:55, PaSkol <DearthNOSPAMpas...@op.pl> wrote:
> W dniu 2012-01-06 14:36, Przemyslaw Rokicki pisze:
>
> >>>       until (writeSerialPort(hCommDev, Strlen(bufferOut))<>    FALSE);
>
> > nic to nie dało, do drukarki nie idzie cały string bo nie ma zadnego
> > komunikatu.
>
> Co to jest writeSerialPort? Skoro korzystasz z API, to czy ta funkcja
> uruchamia WriteFile? Skąd writeSerialPort ma wiedzieć gdzie są dane do
> wysłania? Poza tym StrLen operujące na bufferOut automatycznie skraca
> bufferOut do pierwszego zera w treści. Więc i tak reszta nie pójdzie na
> port.
>

function writeSerialPort(hCommDev: THANDLE; numberOfBytesToWrite:
DWORD): BOOL;
var
  numberOfBytesWritten: DWORD;
begin
  WriteFile(hCommDev, bufferOut, numberOfBytesToWrite,
numberOfBytesWritten, nil);
  Result := WaitCommEvent(hCommDev, fdwEvtMask, nil);
end;

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From: Przemyslaw Rokicki <dumpingowiec@gmail.com>
Newsgroups: pl.comp.lang.delphi
Subject: Re: Port szeregowy, drukarka fiskalna znak NULL
Date: Fri, 6 Jan 2012 06:02:20 -0800 (PST)
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