Владимир пишет:
цитата
А в Harbore есть библиотека, которая поддерживает работу с Com-портами?
Насколько я знаю - в основной поставке ее нет.
Но существует дополнительная библиотека HBcomm, ниже приведено ее описание из файла readme:
HBComm Library
This is the latest iteration of the HBComm library. The modifications made
by me reflect my needs for a serial port library that could talk to more than
one serial port at a time. Further, the original routines would handle only
clear text and would not correctly pass data containing null characters
(Chr(0)). Finally, accessing ports above COM9 was a must.
The major difference in syntax is the need for the user to receive the
"Handle" returned by Init_Port() and pass it to all other routines whenever
referencing a port. This is equivalent to the nComm variable used in the
old Clipper/Fivewin serial routines.
Function Information:
Init_Port( cPort, nBaudrate, nDatabits, nParity, nStopbits, nBuffersize ) -->
nHandle
Port opener and initializer.
Where:
cPort Port designator. Can either be old form 'COMn' or the more
general form '\\.\COMn'. The general form is required for
ports higher than COM9.
nBaudrate Just like you're used to (e.g., 2400, 4800, 9600, etc. )
nDatabits Usually 8, but can be 7 or 4.
nParity coded: 0,1,2,3 -> none, odd, mark, even
nStopbits coded: 0,1,2 -> 1, 1.5, 2
nBuffersize I'm using 8000 at 38,400 baud.
nHandle returned instance identifier. A numeric >= 256. If nHandle
is negative, the open failed.
OutBufClr( nHandle ) --> lSuccess
Clear the output buffer. lSuccess will always be TRUE unless a bad
nHandle is used.
IsWorking( nHandle ) --> lSuccess
Check to see if port is operative. Failures can occur if a bad nHandle
is used or if remote party drops the line.
InChr( nHandle, @cBuff, nChar ) --> nBytesRead
Fetch data from the input buffer. Note the by reference argument passing
for the buffer. nChar can be determined by calling InBufSize().
nBytesRead is the actual number of bytes loaded into cBuff (usually
equal to nChar unless there is a problem or nChar is overstated.)
InBufSize( nHandle ) --> nNumberofBytesInInputBuffer
Get the count of bytes waiting in the input buffer. Usually followed by
a call to Inchr to fetch the bytes for processing.
OutChr( nHandle, cBytesToWrite, nCount ) --> lSuccess
Write the first nCount bytes from the string cBytesToWrite. Usually,
nCount == Len( cBytesToWrite ).
OutBufSize( nHandle ) --> nBytesInOutputBuffer
Get the byte count of characters awaiting transmission.
UnInt_Port( nHandle ) --> lSuccess
Uninitialize (Close) the port and free the handle.
USAGE:
Here's how I do this stuff...
STATIC nHandle
...Mainline...
IF OpenOk()
DOProcessing()
ELSE
MsgStop( 'Cannot open port!' )
QUIT
ENDIF
Function OpenOk()
// Open the port
IF ( nHandle := Init_Port( 'COM1', 9600, 8, 0, 0, 8000 ) ) > 0
OutBufClr( nHandle ) // Saw this somewhere...probably ok if unnecessary
Return IsWorking()
ENDIF
Return FALSE
Function DOProcessing()
...
// Get a chunk from the COM port
nChr := InBuffSize( nHandle )
cBuff := Space( nHandle )
IF nChr != InChr( nHandle, @cBuff, nChr )
MsgStop( 'Some kind of read failure on COM Port.' )
Return FALSE
ENDIF
// process data in cBuff
// write some stuff to port
IF ! OutChr( nHandle, cSomeStuff, Len( cSomeStuff ) )
MsgStop( 'Write error on COM Port.' )
Return FALSE
ENDIF
// ...etc
// and finally, when night is nigh...
// Close the port
UnInt_Port( nHandle )
Return NIL
Any further contributions to this library are most welcome.
Ned Robertson
XpertCTI, LLC
Richmond, VA USA
July 21, 2003
Но существует дополнительная библиотека HBcomm, ниже приведено ее описание из файла readme: 
) 
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