qesptest.cpp

qt下 第三方串口类 最新版本 1.2

/* QespTest.cpp
**************************************/
#include "QespTest.h"
#include <qextserialport.h>
#include <QLayout>
#include <QLineEdit>
#include <QTextEdit>
#include <QPushButton>
#include <QSpinBox>

QespTest::QespTest(QWidget* parent) 
	: QWidget(parent)

{
	//modify the port settings on your own
	port = new QextSerialPort("COM1");
	port->setBaudRate(BAUD19200);
	port->setFlowControl(FLOW_OFF);
	port->setParity(PAR_NONE);    
	port->setDataBits(DATA_8);   
	port->setStopBits(STOP_2);
	//set timeouts to 500 ms
	port->setTimeout(500);

	message = new QLineEdit(this);

	// transmit receive
	QPushButton *transmitButton = new QPushButton("Transmit");
	connect(transmitButton, SIGNAL(clicked()), SLOT(transmitMsg()));
	QPushButton *receiveButton = new QPushButton("Receive");
	connect(receiveButton, SIGNAL(clicked()), SLOT(receiveMsg()));
	QHBoxLayout* trLayout = new QHBoxLayout;
	trLayout->addWidget(transmitButton);
	trLayout->addWidget(receiveButton);
	  
	//CR LF
	QPushButton *CRButton = new QPushButton("CR");
	connect(CRButton, SIGNAL(clicked()), SLOT(appendCR()));
	QPushButton *LFButton = new QPushButton("LF");
	connect(LFButton, SIGNAL(clicked()), SLOT(appendLF()));
	QHBoxLayout *crlfLayout = new QHBoxLayout;
	crlfLayout->addWidget(CRButton);
	crlfLayout->addWidget(LFButton);
	
	//open close
	QPushButton *openButton = new QPushButton("Open");
	connect(openButton, SIGNAL(clicked()), SLOT(openPort()));
	QPushButton *closeButton = new QPushButton("Close");
	connect(closeButton, SIGNAL(clicked()), SLOT(closePort()));
	QHBoxLayout *ocLayout = new QHBoxLayout;
	ocLayout->addWidget(openButton);
	ocLayout->addWidget(closeButton);
	
	received_msg = new QTextEdit();
	  
	QVBoxLayout *myVBox = new QVBoxLayout;
	myVBox->addWidget(message);
	myVBox->addLayout(crlfLayout);
	myVBox->addLayout(trLayout);
	myVBox->addLayout(ocLayout);
	myVBox->addWidget(received_msg);
	setLayout(myVBox);
	
	qDebug("isOpen : %d", port->isOpen());
}

QespTest::~QespTest()
{
    delete port;
    port = NULL;
}

void QespTest::transmitMsg()
{
  int i = port->write((message->text()).toAscii(),
                       (message->text()).length());
  qDebug("trasmitted : %d", i);
}

void QespTest::receiveMsg()
{
	char buff[1024];
  	int numBytes;
  
	numBytes = port->bytesAvailable();
    if(numBytes > 1024) 
    	numBytes = 1024;

    int i = port->read(buff, numBytes);
    if (i != -1)
		buff[i] = '\0';
	else
		buff[0] = '\0';
    QString msg = buff;
	
   	received_msg->append(msg);
   	received_msg->ensureCursorVisible();
	qDebug("bytes available: %d", numBytes);
	qDebug("received: %d", i);
}


void QespTest::appendCR()
{
	message->insert("\x0D");
}

void QespTest::appendLF()
{
	message->insert("\x0A");
}

void QespTest::closePort()
{
	port->close();
	qDebug("is open: %d", port->isOpen());
}

void QespTest::openPort()
{
	port->open(QIODevice::ReadWrite | QIODevice::Unbuffered);
	qDebug("is open: %d", port->isOpen());
}