Shiva Prasad T. S. wrote:
thanx vijay, I am aware of it…
But the device is not a pnp serial device…assume just i had connected
the other side to a system which runs a serial comm. program…,
atleast, i need to detect that the null modem cable is connected to some
active serial comm source…any more ideas…??
thanx,
Shiva P
The most common (and reliable – which, admittedly, is not very) method for
determining this is via DTR. When a serial port is opened by an application,
DTR is normally asserted; when it is closed, it is normally deasserted.
–
- Stevie-O
Real Programmers use COPY CON PROGRAM.EXE