Function Com_Event() Foundation
Waits for an event or a character to arrive at a COM port
Syntax
Com_Event( <nComPortNum> ; // Type: N
) --> nCodeReturn
The function returns a numeric code that is identified by #define constants from XBTCOM.CH, or 0 in case of a failure.
Possible return values of Com_Event()
| Value | Description |
|---|---|
| COM_EVENT_CHAR | A character arrived at the COM port |
| COM_EVENT_CTSDSR | CTS or DSR state changed |
| COM_EVENT_ERROR | Line-status error occurred (overrun, parity or break) |
| COM_EVENT_RING | Ring-indicator is detected (used to wait for an incoming call) |
Description
The behaviour of Com_Event() differs from it's CA-Clipper pendant in that it waits until something arrived at a COM port.
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