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- Detecting events and threads
- Managing very close events
- Disabling one or more events
- Closing the port
- Using an external library: RXTX
sEvent (Function) In french: sEvénement Branches an event on a serial port.  Versions 16 and later New in version 16
// Détection de caractères sur le port COM1
sEvent(1, sEveCharReceived, "LectureCaractère")
// -- Procédure LectureCaractère
PROCÉDURE LectureCaractère(NumPort, NumEvénement)
Trace(sRead(1, sInEntryQueue(1)))
Syntax
<Result> = sEvent(<Port number> , <Event managed> , <WLanguage procedure>)
<Result>: Boolean - True if the function was run,
- False otherwise. If the port has not been previously opened in "Event Management" mode (with the sOpen function), the sEvent function has no effect.
<Port number>: Integer - Number of serial port (1, 2, 3, up to 32 for COM1, COM2, COM3, ... COM32).
- Port number returned by sOpen (if this function was called with a port name).
<Event managed>: Integer constant (or combination of constants) Event to retrieve on the port: | | sEveBreak
(value: 64) | Receive a "Break line" event | sEveCharReceived
(value: 1) | Receive a character | sEveCTS
(value: 8) | Change of CTS status | sEveDSR
(value: 16) | Change of DSR status | sEveTransmitCompleted
(value: 4) | The output buffer is empty | sEveError
(value: 128) | Detect an error on the line
Versions 16 and later New in version 16 | sEvePrinterError
(value: 512) | Printer error detected
Versions 16 and later New in version 16 | sEveEntryQueue80
(value: 1024) | The input buffer is full at 80%
Versions 16 and later New in version 16 | sEveRing
(value: 256) | Detect the "Ring" signal (ring) | sEveRLSD
(value: 32) | Change of RLSD status
Versions 16 and later New in version 16 |
<WLanguage procedure>: Procedure name Name of WLanguage procedure called whenever the specified event is detected. This procedure has the following format:
PROCEDURE <Nom de la procédure>(<Numéro de port>, <Numéro de l'événement>)
where <Port number> corresponds to the port where the event occurred where <Event number> corresponds to one of the event constants. Remarks Detecting events and threads The detection of events is performed in a specific thread of WLanguage. The call to the WLanguage procedure is performed in this thread. Therefore, this procedure is subject to thread limitations (especially for the display). Managing very close events If another event is triggered during the procedure triggered by the event, this last event will not be detected. If very close events are likely to be triggered, we advise you to: - read only the event data (with function sRead) from the Procedure triggered by function sEvent,
- perform the rest of process in another thread.
Disabling one or more events To disable the management of one or more events, use sEndEvent. Closing the port When closing the port, all the events managed on this port are disabled. When re-opening the port, you must re-run sEvent to define the events managed on this port. Versions 16 and later New in version 16 Business / UI classification: Business Logic
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