Platform | Win32 |
Purpose |
To set the communication port to echo back to the sending device. |
Syntax |
INTEGER (KIND=3) SETECHOONREADCOMM@(PORTNUM,STATE)
INTEGER (KIND=3) PORTNUM,STATE |
Description |
When communicating with a serial device such as a terminal, it is often
necessary to return the data to the sender. In the case of a terminal the data
will be transmitted from its keyboard to the host computer. SETECHOONREADCOMM@
is used to enable (STATE = 1) or disable (STATE = 0) the
echoing of data. Data that is echoed back to a terminal will be displayed on
its VDU. PORTNUM is a valid port number in the range 1 to 4. |
Return value |
SETECHOONREADCOMM@ returns a positive value if successful or -1 if an error has
occurred. |
Notes
|
To access this routine you need to provide a definition by, for
example, including the file clearwin.ins or by using the MSWIN module.
|