- Closing the port after a read or write operation
sClose (Function) In french: sFerme Closes the specified serial port, parallel port or infrared port. Remarks: - A port must be closed as soon as it is no longer used.
 Only serial ports are supported.  This function affects the server.
PortNum is int
PortNum = sOpen("COM1", 2000, 2000) // Open COM1
IF PortNum <> 0 THEN
// Configure COM1: Rate 9600, even parity,
// 8 data bits, 1 stop bit
sParameter(PortNum, 9600, 1, 8, 0)
// Rest of process...
sClose(PortNum) // Close COM1
ELSE
Error("Error while opening COM1")
END
Syntax <Port number>: Integer Identifier of the port used: - Port number:
- Number of the serial port: 1, 2, 3, ... 32 for COM1, COM2, COM3, ... COM32.
- Number of the parallel port: -1, -2, -3 or -4 for LPT1, LPT2, LPT3 or LPT4.
- Number of the infrared port: 1, 2, 3, ... 32 for IR1, IR2, IR3, ... IR32.
- Port identifier returned by sOpen (if this function was called with a port name).
Only this type of parameter is available.
Remarks Closing the port after a read or write operation If sClose is run just after sWrite ou sRead, some characters may not be written or read. Indeed, sClose can close the port before all the characters are written or read. To avoid this behavior, use Multitask.
Res = sOpen("COM2", 2000, 2000)
IF Res <> 0 THEN
sParameter(Res, 9600, 0, 8, 0)
sWrite(Res, Str)
Multitask()
sClose(Res)
END
Business / UI classification: Business Logic
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