Witam, próbuje zrobić mały programi dosłownie 2 przyciski, pierwszy ma włączać linie RTS i DTR a drugi wyłączać. Znalazłem artykuły dość obszerne na teman RS232 w delphi ale jakoś mi to nie wychodz...
Czy ktoś kto zna dobrze obsługe Rs-232 mogóby mi napisać takie źródło? ewentualnie powiedzić co i jak...
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Winapi: SetCommState
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BOOL EscapeCommFunction(
HANDLE hFile, // handle to communications device
DWORD dwFunc // extended function to perform
);
Parameters
hFile
Identifies the communications device. The CreateFile function returns this handle.
dwFunc
Specifies the code of the extended function to perform. This parameter can be one of the following values:
Value Meaning
CLRDTR Clears the DTR (data-terminal-ready) signal.
CLRRTS Clears the RTS (request-to-send) signal.
SETDTR Sends the DTR (data-terminal-ready) signal.
SETRTS Sends the RTS (request-to-send) signal.
SETXOFF Causes transmission to act as if an XOFF character has been received.
SETXON Causes transmission to act as if an XON character has been received.
SETBREAK Suspends character transmission and places the transmission line in a break state until the ClearCommBreak function is called (or EscapeCommFunction is called with the CLRBREAK extended function code). The SETBREAK extended function code is identical to the SetCommBreak function. Note that this extended function does not flush data that has not been transmitted.
CLRBREAK Restores character transmission and places the transmission line in a nonbreak state. The CLRBREAK extended function code is identical to the ClearCommBreak function.
Return Values
If the function succeeds, the return value is nonzero.