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Ayuda / WLanguage / Funciones WLanguage / Funciones estándar / Funciones de Windows / Funciones de puertos serie y paralelo
  • Using an external library: RXTX
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Otros
Procedimientos almacenados
Defines or modifies the parameters for configuring the specified serial port, parallel port or infrared port. This setting is optional.
The default values are as follows:
  • Transfer rate: 9600 Bauds
  • Parity: None
  • 8 data bits
  • 1 stop bit
Warning The settings for two linked workstations must be identical.
Remarks:
  • The port must be opened (sOpen) before the call to sParameter. sOpen automatically initializes the serial port.
  • LinuxJava Infrared ports are not supported.
  • Linux Only serial ports are supported.
Ejemplo
PortNum = sOpen("COM1", 2000, 2000) // Open COM1
IF PortNum <> 0 THEN
	// Com1 settings: 9600 rate, even parity, 
	// 8 data bits, 1 stop bit
	IF sParameter(PortNum, 9600, 1, 8, 0) THEN // Configure COM1 
		// Rest of process...
	ELSE
		Error("COM1 configuration error", ErrorInfo(errFullDetails))
	END
	sClose(PortNum) // Close COM1
ELSE
	Error("Error opening COM1", ErrorInfo(errFullDetails))
END
Sintaxis
<Result> = sParameter(<Port number> , <Rate> , <Parity> , <Nb Data Bits> , <Nb Stop Bits> [, <DTR/DSR> [, <RTS/CTS> [, <XON/XOFF>]]])
<Result>: Boolean
  • True if the parameters have been initialized properly,
  • False otherwise. HErrorInfo returns more details.
Note: If the port has not been previously opened (by function sOpen), function sParameter has no effect..
<Port number>: Integer
Identifier of the port used:
  • Port number:
    • Serial port number: 1, 2, 3, ... 32 for COM1, COM2, COM3, ... COM32.
    • Parallel port number: -1, -2, -3 or -4 for LPT1, LPT2, LPT3 or LPT4.
    • Infrared port number: 1, 2, 3, ... 32 for IR1, IR2, IR3, ... IR32.
  • Port identifier returned by sOpen (if this function was called with a port name).
    Linux Only this type of parameter is available.
<Rate>: Integer
Rate for data transfer (expressed in Bauds or Bits per second).
<Parity>: Integer
Parity of the transfer:
0No parity
1Even parity
2Odd parity
<Nb Data Bits>: Integer
Number of bits per character: 4, 5, 6, 7 or 8.
<Nb Stop Bits>: Integer
Number of stop bits:
01 stop bit
11.5 stop bits
22 stop bits

<DTR/DSR>: Optional integer
  • 0 (or False, default value) if the DTR/DSR protocol must be ignored and if it should be in "active" mode.
  • 1 (or True) if the DTR/DSR protocol must be in "Handshake" mode,
  • 2 if the DTR/DSR protocol must be ignored and if it should be in "inactive" mode.
    For more details, see the documentation for managing communication ports.
Java This parameter is ignored.
<RTS/CTS>: Optional integer
  • 0 (or False, default value) if the RTS/CTS protocol must be ignored and if it should be in "active" mode.
  • 1 (or True) if the RTS/CTS protocol must be in "Handshake" mode,
  • 2 if the RTS/CTS protocol must be ignored and if it should be in "inactive" mode.
    For more details, see the documentation for managing communication ports.
Java This parameter is ignored.
<XON/XOFF>: Optional boolean
  • True if the XON/XOFF protocol must be taken into account,
  • False (default value) if this protocol must be ignored.
Java This parameter is ignored.
Observaciones
Linux Special case for Linux:
  • Only serial ports can be opened and initialized.
  • By default, users do not have access to serial ports. It is necessary to grant them specific rights to manage serial ports.
Java

Using an external library: RXTX

In Java, the use of serial and parallel port manipulation functions (functions sOpen, sWrite, sRead, ...) requires the presence of an external library: RXTX.
This library includes a Jar archive and one or more native libraries that depend on the operating system on which the application is run. To use these functions:
  • the Jar archive (RXTXComm.jar) must:
    • be found in the same directory as the Java application generated by WINDEV,
    • be found in the execution classpath of the application,
    • be directly included in the generated application (from the wizard for Java generation).
  • the native libraries corresponding to the operating system on which the application is run must be found:
    • in the same directory as the Java application generated by WINDEV,
    • in the path of the application libraries (librarypath).
You can download the RXTX library and its documentation from the following link: http://users.frii.com/jarvi/rxtx/index.html (link valid at the time of writing).
Attention: Infrared port management not available in Java.
Clasificación Lógica de negocio / UI: Lógica de negocio
Componente: wd300com.dll
Ver también
Versión mínima requerida
  • Versión 9
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Comentarios
exemplo
sClose(EDT_Porta_COM)
// Open COM (using the port number)
// sOpen(Porta,SizeInBuffer,SizeOutBuffer,Timeout,ManagerEvents)
LineCom is boolean = sOpen(EDT_Porta_COM, EDT_Buffer_de_Entrada, EDT_Buffer_de_Saida)

IF LineCom = True THEN
// Configure COM1: Rate 9600, even parity,
// 8 data bits, 1 stop bit
//sParameter()
LineCom = sParameter(EDT_Porta_COM, EDT_Bit_por_segundos, EDT_Paridade, EDT_Bit_de_Dados, EDT_Bit_de_Parada)
// Rest of process...
EDT_Historico += sRead(EDT_Porta_COM,EDT_Buffer_de_Entrada) + CR + CR

EDT_Historico += sWrite(EDT_Porta_COM,EDT_Comando_AT) + CR + CR

EDT_Historico += sRead(EDT_Porta_COM,EDT_Buffer_de_Entrada) + CR + CR
// Close COM1
sClose(EDT_Porta_COM)
ELSE
Error("Error while opening COM"+EDT_Porta_COM)
END
Boller
20 05 2022

Última modificación: 27/03/2025

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