The following is the mainwindow.cpp code
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtCore/QCoreApplication>
#include <QtCore/QDebug>
#include <abstractserial.h>
#include <iostream>
MainWindow
::MainWindow(QWidget *parent
) : ui(new Ui::MainWindow)
{
ui->setupUi(this);
/* Writer
*
* This application is part of the examples on the use of the library QSerialDevice.
*
* writer - a test console application to write data to the port
*
* Copyright (C) 2009 Denis Shienkov
*
* Contact Denis Shienkov:
* e-mail: <scapig2@yandex.ru>
* ICQ: 321789831
*/
using namespace std;
AbstractSerial *port = new AbstractSerial();
/* 1. First - create an instance of an object.
*/
char dn[50]; //device name
cout << "Please enter serial device name, specific by OS, \n example: in Windows -> COMn, in GNU/Linux -> /dev/ttyXYZn: ";
cin >> dn;
/* 2. Second - set the device name.
*/
port->setDeviceName(dn);
/* 3. Third - open the device.
Here, the port is opened with the flag "Unbuffered".
In this case (transfer data) can not use this flag.
*/
if (port->open(AbstractSerial::WriteOnly | AbstractSerial::Unbuffered)) {
qDebug() << "Serial device " << port->deviceName() << " open in " << port->openMode();
//Here, the default current parameters (for example)
qDebug() << "= Default parameters =";
qDebug() << "Device name : " << port->deviceName();
qDebug() << "Baud rate : " << port->baudRate();
qDebug() << "Data bits : " << port->dataBits();
qDebug() << "Parity : " << port->parity();
qDebug() << "Stop bits : " << port->stopBits();
qDebug() << "Flow : " << port->flowControl();
/* 4. Fourth - now you can set the parameters. (after successfully opened port)
*/
//Here example set baud rate 115200 bit/sec (baud)
if (!port->setBaudRate(AbstractSerial::BaudRate115200)) {
qDebug() << "Set baud rate " << AbstractSerial::BaudRate115200 << " error.";
goto label;
};
if (!port->setDataBits(AbstractSerial::DataBits8)) {
qDebug() << "Set data bits " << AbstractSerial::DataBits8 << " error.";
goto label;
}
if (!port->setParity(AbstractSerial::ParityNone)) {
qDebug() << "Set parity " << AbstractSerial::ParityNone << " error.";
goto label;
}
if (!port->setStopBits(AbstractSerial::StopBits1)) {
qDebug() << "Set stop bits " << AbstractSerial::StopBits1 << " error.";
goto label;
}
if (!port->setFlowControl(AbstractSerial::FlowControlOff)) {
qDebug() << "Set flow " << AbstractSerial::FlowControlOff << " error.";
goto label;
}
/*
...
here you can set other parameters.
...
*/
/*
Important Note:
1. For All OS:
If you use buffered mode (ie, at the opening did not put the flag AbstractSerial::Unbuffered),
there is no need to set timeouts reading (Ie they are to remain the default = 0)/
Any value other than 0 will only slow down data acquisition.
2. For Windows:
If you are using unbuffered mode, the timeouts have the effect of reading!
Necessary for the total timeout to set the value of reading At least 1 ms,
or (at 0) will not be read.
PS: I have not figured out yet what the reason.
3. For *.nix:
If you are using unbuffered mode, the timeouts have the effect of reading!
Necessary for the total timeout to set the value of reading At least 100 ms,
as if the value is 0 read will return immediately,
so you can not read the requested number of bytes (ie, reading function can return fewer bytes).
In any case, experiment with options for treatment with buffered/unbuffered,
as well as the timeout values from 0 to N and find the differences. :)
*/
//Here, the new set parameters (for example)
qDebug() << "= New parameters =";
qDebug() << "Device name : " << port->deviceName();
qDebug() << "Baud rate : " << port->baudRate();
qDebug() << "Data bits : " << port->dataBits();
qDebug() << "Parity : " << port->parity();
qDebug() << "Stop bits : " << port->stopBits();
qDebug() << "Flow : " << port->flowControl();
qint64 bw = 0; //bytes really writed
/* 5. Fifth - you can now read / write device, or further modify its settings, etc.
*/
while (1) {
bw = 0;
cout << "Please enter count bytes for wtitten : ";
cin >> bw;
qDebug
() <<
"Starting writting " << bw <<
" bytes in time : " <<
QTime::currentTime();
ba.clear();
ba.resize(bw);
while (bw--) //filling data array
ba[(int)bw] = bw;
bw = port->write(ba);
qDebug() << "Writed is : " << bw << " bytes";
}
}
else {
qDebug() << "Error opened serial device " << port->deviceName();
}
label:
port->close();
qDebug() << "Serial device " << port->deviceName() << " is closed";
delete port;
port = 0;
}
MainWindow::~MainWindow()
{
delete ui;
}
qserialdevice & gui
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