vpParallelPort Class Reference

#include <visp3/io/vpParallelPort.h>

Public Member Functions
	vpParallelPort ()
	~vpParallelPort ()
void	sendData (unsigned char &data)
unsigned char	getData ()

Detailed Description

Parallel port management under unix.

The code below shows how to send a data over the parallel port.

#include <visp3/core/vpConfig.h>
#include <visp3/io/vpParallelPort.h>

int main()
{
#ifdef VISP_HAVE_PARPORT
  vpParallelPort parport;

  unsigned char data = 5; // 0x00000101 = 5 in decimal
  parport.sendData(data); // D0 and D2 are set to logical level 1
#endif
}

Examples:

parallelPort.cpp.

Definition at line 82 of file vpParallelPort.h.

Constructor & Destructor Documentation

vpParallelPort::vpParallelPort

(

)

Constructor to acces to a parallel port.

Open and initialise the parallel port by sending 0 to the data bus.

Set the default device to "/dev/parport0".

Exceptions

vpParallelPortException::opening

If the device used to access to the parallel port can't be opened. A possible reason is that you don't have write access.

Definition at line 73 of file vpParallelPort.cpp.

References sendData().

vpParallelPort::~vpParallelPort

(

)

Destructor to close the parallel port.

Exceptions

vpParallelPortException::closing

If the device used to access to the parallel port can't be closed.

Definition at line 89 of file vpParallelPort.cpp.

Member Function Documentation

unsigned char vpParallelPort::getData

(

)

Get the last data sent to the parallel port.

Definition at line 153 of file vpParallelPort.cpp.

void vpParallelPort::sendData

(

unsigned char &

data

)

Send a data to the parallel port.

Parameters

data	: Value [D7, D6, ... D0] to send to the data bus.

The code bellow shows how to set D0 and D2 to logical level 1:

vpParallelPort parport;

unsigned char data = 5; // 0x00000101 = 5 in decimal
parport.sendData(data); // D0 and D2 are set to logical level 1

Returns

true if the device was close, false if an error occurs.

Examples:

parallelPort.cpp.

Definition at line 140 of file vpParallelPort.cpp.

Referenced by vpRingLight::off(), vpRingLight::on(), vpRingLight::pulse(), and vpParallelPort().