I am planning to improve, if possible, the serial units for both Linux
and Windows, but have a few questions before I proceed any further:
1- I guess the unit rtl\win\wininc\struct.inc has 2 bugs:
a- bm_DCB_fRtsControl = $3000. It should be $2000.
b- bm_DCB_fDtrControl = $30. It should be $20.
Can anybody confirm this?
2- I will define TSerialFlags = set of (XOnXOffFlowControl,
RtsCtsFlowControl);
What flags do we have to set in Linux to have XOnXOff handshaking? The
number of parameters in tios is mind boggling.
3- The Linux SerOpen function (based on fpopen) claims to return 0 if
the device could not be found. Shouldn't it be -1?
4- Windows SerOpen function (based on CreateFile) returns an
INVALID_HANDLE_VALUE if the device could not be found. How to unify for
both Linux & Windows? Is it safe to return instead -1 (as in the Linux
case)?
5- Is it OK to designate serial ports by COMx fow Windows and /dev/ttySx
for Linux?
6- Is it OK for TSerialState to include DCB for Windows and tios for Linux?
My guess for questions 5 and 6 is yes.
Any input is appreciated.
Stephano
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