serial.cpp

PXA270的串口调试程序

#include "serialform.h"
#include "serial.h"

#include <qcombobox.h>
#include <qframe.h>
#include <qlabel.h>
#include <qlineedit.h>
#include <qmultilineedit.h>
#include <qpushbutton.h>
#include <qlayout.h>
#include <qvariant.h>
#include <qtooltip.h>
#include <qwhatsthis.h>
#include <qimage.h>
#include <qpixmap.h>

#include <qpushbutton.h>
#include <qimage.h>
#include <qpixmap.h>
#include <qmessagebox.h>
#include <qdir.h>
#include <qfile.h>
#include <qfiledialog.h>
#include <qtimer.h>
#include <qtextstream.h>
#include <qcursor.h>
#include <qtooltip.h>


// some .h files used for serial port programming
#include  <stdio.h>
#include  <stdlib.h>
#include  <unistd.h>
#include  <sys/types.h>
#include <sys/signal.h>
#include  <sys/stat.h>
#include  <fcntl.h>
#include  <termios.h>
#include  <errno.h>
#include <limits.h>

static struct termios termios_old, termios_new;
static fd_set   fs_write;
static struct timeval tv_timeout;


Serial::Serial( QWidget* parent,  const char* name, bool modal, WFlags fl )
    : Serial_Form( parent, name, modal, fl )
{
    serialfd=-1;

    ReadComTimer = new QTimer(this);                                    //Read Com Port Timer

    Baudrate_Combobox->setCurrentItem(1);
    Serialport_Combobox->setCurrentItem(0);
    E_obits_Combobox->setCurrentItem(2);
    Stopbits_Combobox->setCurrentItem(0);
    Databits_Combobox->setCurrentItem(0);
    
    Portsel=Serialport_Combobox->currentItem();
    Ratesel=Baudrate_Combobox->currentItem();
    EvenOddsel=E_obits_Combobox->currentItem();
    StopBitsel=Stopbits_Combobox->currentItem();
    DataBitsel=Databits_Combobox->currentItem();
    
    // connection of the bottons
    connect( Exit_Botton, SIGNAL( clicked() ), SLOT( close() ) );
    connect( About_Botton, SIGNAL( clicked() ), SLOT( AboutShow() ) );
    connect( Openfile_Botton, SIGNAL( clicked() ),  SLOT( OpenFile() ) );
    connect( Sendfile_Botton, SIGNAL( clicked() ),  SLOT( SendFile() ) );
    connect( Modify_Botton, SIGNAL( clicked() ), SLOT( ModifyPath() ) );
    connect( Savedisplay_Botton, SIGNAL( clicked() ), SLOT( SaveDiplayData() ) );
    connect( Openport_Botton, SIGNAL( clicked() ), SLOT( OpenPort() ) );
    connect( Manul_Botton, SIGNAL( clicked() ), SLOT( ManulSend() ) );
    connect( Cleardisplay_Botton, SIGNAL( clicked() ), SLOT( ClearDisplay() ) );
    
    // connection of the comboboxes
    connect( Databits_Combobox, SIGNAL( activated(int) ), SLOT( DatabitsChange(int) ) );
    connect( E_obits_Combobox, SIGNAL( activated(int) ), SLOT( EvenoddChange(int) ) );
    connect( Serialport_Combobox, SIGNAL( activated(int) ),  SLOT( SerialportChange(int) ) );
    connect( Stopbits_Combobox, SIGNAL( activated(int) ), SLOT( StopbitsChange(int) ) );
    connect( Baudrate_Combobox, SIGNAL( activated(int) ), SLOT( BaudrateChange(int) ) );

    // connection of timeout
    connect( ReadComTimer,SIGNAL(timeout()), SLOT(ReadComPort()));
}

Serial::~Serial()
{
}

void Serial::OpenFile()
{/*
    QString filename= QFileDialog::getOpenFileName("/root",QString::null,this,"Open File Dialog","Choose a File to Open");

    if( !filename.isEmpty() )
        {
	        QFile f(filename);
	        if(!f.open(IO_ReadOnly))
	            return;
	        Transmit_Mulitlineedit->clear( );
	        QTextStream t( &f );
	        while(!t.eof())
	            {
	                QString s=t.readLine();
	                Transmit_Mulitlineedit->append(s);
                }

            f.close();

            Filepath_Textlabel->setText(filename);
        }*/
}

int Serial::WriteComPort (const char *data, int datalength)                     //  ?
{
    int buflen, baud ,retval, len = 0, total_len = 0;
    //FD_ZERO (&fs_write);
   // FD_SET (serialfd, &fs_write);
    baud = GetBaudRate();
    buflen= datalength ;

    tv_timeout.tv_sec =  ( (buflen*20)/baud ) + 2  ;
    tv_timeout.tv_usec = 0 ;
    //tv_timeout.tv_sec = TIMEOUT_SEC( buflen, baud );                 //modify
    //tv_timeout.tv_usec = TIMEOUT_USEC;

    for (total_len = 0, len = 0; total_len < datalength;)
    {
        retval = select (serialfd + 1, NULL, &fs_write, NULL, &tv_timeout);
        if (retval)
	{
	    len = ::write(serialfd, &data[total_len], datalength - total_len);
            if (len > 0)
                total_len += len;
        }
        else
	{
            tcflush (serialfd, TCOFLUSH);     /* flush all output data */
            break;
        }
    }
    return (total_len);
}

void Serial::SendFile()
{
    QString str=Filepath_Textlabel->text() ;
    const char *path;
    int total_len=0;
    Sendfile_Botton->setCursor( QCursor( WaitCursor ) );
    if(serialfd<0)
	    QMessageBox::information(this,"Information","Port isn't opened");
    else
        {
            path=str.latin1();
            total_len=SendComFile( path );
            if (total_len<0)
		        QMessageBox::information(this,"Information","Send Error");
		     else
		        {
			        Sendfile_Botton->setCursor( QCursor( 13 ) );
			        QString str;
			        str=str.setNum(total_len);
			        str="Send Over , Send bytes is "+ str;
			        QMessageBox::information(this,"Information",str);
		        }
	    }
}

int Serial::SendComFile( const char *path )
{
    int fd, buflen;
    int total_len , len_tmp;
    total_len=0; len_tmp=0;
    QString pathname(path);
    char buf[BUFFER_LEN+1];
    QFile f(pathname);
    fd=f.open(IO_ReadOnly);
    if( fd<0)
        {
	        QMessageBox::information(this,"Information","File open error");
	        return (-1);
        }
    
    while(!f.atEnd())
        {
	        bzero(buf, sizeof(buf));
	        buflen = f.readLine(buf,sizeof(buf));
	        if (buflen == 0)
	            {
	                f.close();
	                break;
	            }
	        buf[buflen]=0;
	        len_tmp=WriteComPort( buf , buflen );
	        if( len_tmp !=buflen )
	            {
	                QMessageBox::information(this,"Information","Write error");
	                f.close();
	                return (-1);
	            }
	        else
	            total_len+=len_tmp;
        }
    f.close();
    return (total_len);          
}

void Serial::AboutShow()
{
    QMessageBox::about(this,"About...","a simple serial wiget");

}

void Serial::ModifyPath()
{
    Recieve_Multilineedit->clear();
}

void Serial::OpenPort()
{
    QString caption;
    int retval;
    caption=Openport_Botton->text();
    ReadComTimer->stop();

    if(caption.find("Open",0,FALSE)>=0)
        {
	        Openport_Botton->setText("Close Port");
	        serialfd=OpenSerialPort(Portsel);	                                    // Open com port
	        QPixmap bg = QPixmap(QDir::currentDirPath()+"/greed.png");
	        Portstauts_Pixmap->setPixmap( bg );
	        if(serialfd<0)
	            QMessageBox::information(this,"Information","Cannt Open Serial Port");
	        else
	            {
	                retval=SetSerialPara(DataBitsel , StopBitsel , EvenOddsel , Ratesel);
	                ReadComTimer->start(10);
	            }

        }
    else
        {
	        Openport_Botton->setText("Open Port");
	        QPixmap bg = QPixmap(QDir::currentDirPath()+"/red.png");
	        Portstauts_Pixmap->setPixmap(bg);
	        if(serialfd>0)
	            CloseComPort();
        }
}

void Serial::CloseComPort()
{
    tcsetattr (serialfd, TCSADRAIN, &termios_old);
    ::close (serialfd);
    serialfd=-1;
}

void Serial::ManulSend()
{
    int len;
    const char *strchar;
    if(serialfd>0)
        {
	        QString str=Transmit_Mulitlineedit->text();
	        len=str.length();
	        if(!str.isEmpty())
	            {
	                strchar=str.latin1();
	                if(WriteComPort(strchar,len)!=len)
	                    QMessageBox::information(this,"information","write Error");
	            }
	        else
	            QMessageBox::information(this,"Information","Send context is Empty");
         }
    else
	    QMessageBox::information(this,"Information","Serial Port is not Opened");
}

void Serial::SerialportChange(int)
{
    Portsel=Serialport_Combobox->currentItem();
}

void Serial::BaudrateChange(int)
{
    Ratesel=Baudrate_Combobox->currentItem();
}

void Serial::DatabitsChange(int)
{
    DataBitsel=Databits_Combobox->currentItem();
}

void Serial::StopbitsChange(int)
{
    StopBitsel=Stopbits_Combobox->currentItem();
}

void Serial::EvenoddChange(int)
{
    EvenOddsel=E_obits_Combobox->currentItem();
}

void Serial::SaveDiplayData()
{
    qWarning( "frmserial::SaveDiplayData(): Not implemented yet" );
}

void Serial::ClearDisplay()
{
    Transmit_Mulitlineedit->clear();
    Filepath_Textlabel->clear();
}

int  Serial::OpenSerialPort(int index)
{
    char *device;
    switch(index)
        {
        case 0:
	        device="/dev/ttyS0";
	        break;
        case 1:
	        device="/dev/ttyS1";
	        break;
        case 2:
	        device="/dev/ttyS2";
	        break;
        case 3:
	        device="/dev/ttyS3";
	        break;
         default:
	        device="/dev/ttyS0";
        }

    int fd=open( device, O_RDWR | O_NOCTTY | O_NONBLOCK);

    if ( fd<0 )
        {
	        QMessageBox::information(this,"Information","Can't Open the Serial Port");
	        return -1;
        }
    tcgetattr(fd , &termios_old);

    return fd;
}

int Serial::SetSerialPara(int databits , int stopbits ,int parity, int speed)
{
    bzero( &termios_new, sizeof(termios_new));
    cfmakeraw(&termios_new);
    termios_new.c_cflag=BaudRate(speed);
    termios_new.c_cflag |= CLOCAL | CREAD;

    termios_new.c_cflag &= ~CSIZE;
    switch (databits) //
    {
    case 0:
	termios_new.c_cflag |= CS8;
	break;
    case 1:
	termios_new.c_cflag |= CS7;
	break;
    case 2:
	termios_new.c_cflag |= CS6;
	break;
    case 3:
	termios_new.c_cflag |= CS5;
	break;
    default:
	termios_new.c_cflag |= CS8;
	break;
    }

    switch (parity) //
    {
    case 0:
	termios_new.c_cflag |= PARENB;     // Enable parity
	termios_new.c_cflag &= ~PARODD;
	break;
    case 1:
	termios_new.c_cflag |= PARENB;
	termios_new.c_cflag |= ~PARODD;
	break;
    case 2:  				//as no parity
	termios_new.c_cflag &= ~PARENB;    //Clear parity enable
	break;
    default:
	termios_new.c_cflag &= ~PARENB;   // Clear parity enable
	break;
    }
    switch (stopbits)// set Stop Bit
    {
    case 0:
	termios_new.c_cflag &= ~CSTOPB;
	break;
    case 1:
	termios_new.c_cflag |= CSTOPB;
	break;
    default:
	termios_new.c_cflag &= ~CSTOPB;
	break;
    }
    tcflush(serialfd,TCIFLUSH); // Update the termios_new and do it NOW
    termios_new.c_cc[VTIME] = 1; /* unit: 1/10 second. */
    termios_new.c_cc[VMIN] = 1; /* minimal characters for reading */
    tcflush (serialfd, TCIFLUSH);
    return tcsetattr(serialfd,TCSANOW,&termios_new);
}

int Serial::BaudRate( int baudrate)
{
    switch(baudrate)
        {
        case 0:
	        return (B4800);
        case 1:
	        return (B9600);
        case 2:
	        return (B19200);
        case 3:
	        return (B38400);
        case 4:
	        return (B57600);
        case 5:
	        return (B115200);
        default:
	        return (B9600);
        }
}

int Serial::_BaudRate(int baudrate)
{
    switch(baudrate)
        {
        case B4800:
	        return (4800);
        case B9600:
	        return (9600);
        case B19200:
	        return (19200);
        case B38400:
	        return (38400);
        case B57600:
	        return (57600);
        case B115200:
	        return (115200);
        default:
	        return (9600);
        }
}

int Serial::GetBaudRate()
{
    return ( _BaudRate( cfgetospeed( &termios_new ) ) );
}

void Serial::ReadComPort()
{
   char recvbuf [ BUFFER_LEN+1 ] ;
   int buflen= -1;
    if(serialfd>0)
    {
       buflen=::read (serialfd, recvbuf, BUFFER_LEN);
       if (buflen>0)
            {
	            recvbuf[buflen]=0;
	            QString str(recvbuf);
	            Recieve_Multilineedit->insert(str);
            }
    }
}