QT串口读取数据

C/C++ code

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/**************************************************************************** ** Form interface generated from reading ui file 'drawdemo.ui' ** ** Created: Wed Feb 20 13:05:54 2008 ** by: The User Interface Compiler (uic) ** ** WARNING! All changes made in this file will be lost! ****************************************************************************/ #ifndef MYPLOTTER_H #define MYPLOTTER_H #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include class QVBoxLayout; class QHBoxLayout; class QGridLayout; class MyPlotter : public QWidget { Q_OBJECT public : MyPlotter( QWidget* parent = 0, const char * name = 0, WFlags fl = 0 ); ~MyPlotter(); protected : virtual void paintEvent(QPaintEvent *); private slots: void rad(); void savefile(); void dos(); void sendFG(); void flushBuff(); private : char buffer1[500]; char buffer2[500]; int buffer[10]; int shijz[250]; int highb; int lowb; float x_data[250]; QTimer *timer0; QFrame *frame; public : QLabel *x_label[10]; QLabel *y_label[10]; QPainter *painter; QMultiLineEdit *medit; QLabel *file_name; QString file_name_in; QLineEdit *file_name_edit; QPushButton *button0; QPushButton *button1; QPushButton *button2; QPushButton *button3; QString convert_data; int confirm_flag; char ReceiveData[20]; int fd; int i; int j; int qianb; int baib; int shib; int geb; int otd; int m1; int m2; int ret; int k; int wtable; int rtable; char buff[10]; int yCoor[10]; int xCoor[10]; int hui[10]; void drawHui(); };

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/**************************************************************************** ** Form implementation generated from reading ui file 'drawdemo.ui' ** ** Created: Wed Feb 20 13:06:23 2008 ** by: The User Interface Compiler (uic) ** ** WARNING! All changes made in this file will be lost! ****************************************************************************/ #include "plotter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define xStep 25 //x #define yStep 13 //y #define frameWidth 250 #define frameHeight 160 #define DEVICE "/root/Documnets/text/plain/text.txt" /* * Constructs a Form1 which is a child of 'parent', with the * name 'name' and widget flags set to 'f' */ MyPlotter::MyPlotter( QWidget* parent, const char * name, WFlags fl ) : QWidget( parent, name, fl ) { if (!name) setName( "PlotterWindow" ); resize( 320, 200 ); setCaption( tr( "Plotter" ) ); int value=0; int j=0; QString s=NULL; /***建立绘图框区***/ frame= new QFrame( this , "frame" ); frame->setBackgroundColor(black); frame->setGeometry(QRect(15,20,frameWidth,frameHeight)); /***建立横坐标轴上的时间标签***/ for ( int i=0;i<10;i++) { x_label[i]= new QLabel( "timer" , this ); x_label[i]->setAlignment(Qt::AlignVCenter|Qt::AlignHCenter); x_label[i]->setGeometry(QRect(5+(i*xStep),185,20,10)); } /***建立纵坐标轴上的数据标签***/ for ( int i=0;i<=10;i++) { s=s.setNum(value); //该函数是将整数转换为字符串 y_label[i]= new QLabel(s, this ); y_label[i]->setAlignment(Qt::AlignVCenter|Qt::AlignHCenter); y_label[i]->setGeometry(QRect(5,185-(i*yStep),6,5)); value+=5; xCoor[i]=(i*xStep); //保存x坐标轴上的坐标值，以供后面绘图所用 } file_name= new QLabel( this ); file_name_edit= new QLineEdit( this ); button0= new QPushButton( "R&D" , this ); button0->setGeometry(QRect(270,20,40,20)); button0->setFont(QFont( "Times" ,12,QFont::Bold)); connect(button0,SIGNAL(clicked()), this ,SLOT(rad())); button1= new QPushButton( "SF" , this ); button1->setGeometry(QRect(270,50,40,20)); button1->setFont(QFont( "Times" ,12,QFont::Bold)); connect(button1,SIGNAL(clicked()), this ,SLOT(savefile())); button2= new QPushButton( "DOS" , this ); button2->setGeometry(QRect(270,80,40,20)); button2->setFont(QFont( "Times" ,12,QFont::Bold)); connect(button2,SIGNAL(clicked()), this ,SLOT(dos())); button3= new QPushButton( "send" , this ); button3->setGeometry(QRect(270,110,40,20)); button3->setFont(QFont( "Times" ,12,QFont::Bold)); connect(button3,SIGNAL(clicked()), this ,SLOT(sendFG())); file_name->setGeometry(QRect(270,140,40,20)); file_name->setAlignment(Qt::AlignVCenter|Qt::AlignHCenter); file_name->setText( "File_Name" ); file_name_edit->setGeometry(QRect(270,170,40,20)); timer0= new QTimer( this , "timer0" ); connect(timer0,SIGNAL(timeout()), this ,SLOT(flushBuff())); timer0->start(1000); } void MyPlotter::rad() { /***串口初始化***/ struct termios newtio,oldtio; fd=open( "/dev/ttyS1" ,O_RDWR|O_NOCTTY|O_NDELAY); //打开串口设备文件 if (fd<0) { perror ( "open serial device error" ); exit (1); } if (fcntl(fd,F_SETFL,0)<0) perror ( "fcntl failed" ); if (isatty(STDIN_FILENO)!=0) printf ( "isatty sucess!\n" ); tcgetattr(fd,&oldtio); bzero(&newtio, sizeof (newtio)); newtio.c_cflag|=CLOCAL|CREAD; //CREAD:接收使能,CLOCAL:本地连接 newtio.c_cflag&=~CSIZE; //无位掩码 newtio.c_cflag|=CS8; //8位数据位 newtio.c_cflag&=~PARENB; //非校验位使能 cfsetispeed(&newtio,B115200); //设置输入输出波特率 cfsetospeed(&newtio,B115200); newtio.c_cflag&=~CSTOPB; //1位停止位 newtio.c_cc[VTIME]=0; newtio.c_cc[VMIN]=0; tcflush(fd,TCIFLUSH); if (tcsetattr(fd,TCSANOW,&newtio)<0) { perror ( "tcsetattr is error" ); exit (1); } /***读取串口数据***/ printf ( "begin to read:\n" ); ret = read(fd,buffer1,500 ); printf ( "ret=%d\n" , ret ); close(fd); /***数据处理***/ for ( i = 0; i < 500; i=i+2 ) { int ww=0; otd=buffer1[i]+buffer1[i+1]*256; //其中buffer[i]为低8位,buffer[i+1]为高2位 //lowb=(int)strtol(buffer1[i],&str,16);//低字节转换数 //highb=(int)strtol(buffer1[i+1],&str,16);//高字节转换数 qianb=otd/1000; m1=otd%1000; baib=m1/100; m2=m1%100; shib=m2/10; geb=m2%10; ww=i/2; shijz[ww]=qianb*1000+baib*100+shib*10+geb; //数据合成 // printf("read1=%d\n",shijz[ww]); } for ( i = 0; i < 250; i++) { x_data[i]=(shijz[i]*5)/1024; //换算为模拟数值 // printf("x_data=%d\n",x_data[i]); } } void MyPlotter::savefile() { if ((fd = open(DEVICE,O_RDWR | O_NONBLOCK))<0) { qWarning( "can not open device" ); return ; } qWarning( "open device: %s\n" ,DEVICE); wtable=500*j; lseek(fd, SEEK_SET, wtable); ret=write(fd,buffer1,500); printf ( "ret=%d\n" , ret ); if (ret!=500) printf ( "write error\n" ); else j=j+1; printf ( "write data ok\n" ); for (i=0;i<500;i++) { printf ( "buffer1=%x\n" ,buffer1[i]); } close(fd); } void MyPlotter::dos() { file_name_in=file_name_edit->text(); k=file_name_in.toInt(); if ((fd = open(DEVICE,O_RDWR | O_NONBLOCK))<0) { qWarning( "can not open device" ); return ; } qWarning( "open device: %s\n" ,DEVICE); rtable=k*500+1; lseek(fd, SEEK_SET, rtable); printf ( "begin to read:\n" ); ret = read(fd, buffer2,500 ); printf ( "ret=%d\n" , ret ); close(fd); /***数据处理***/ for ( i = 0; i < 500; i=i+2 ) { int ww=0; otd=buffer2[i]+buffer2[i+1]*256; //其中buffer[i]为低8位,buffer[i+1]为高2位 //lowb=(int)strtol(buffer1[i],&str,16);//低字节转换数 //highb=(int)strtol(buffer1[i+1],&str,16);//高字节转换数 qianb=otd/1000; m1=otd%1000; baib=m1/100; m2=m1%100; shib=m2/10; geb=m2%10; ww=i/2; shijz[ww]=qianb*1000+baib*100+shib*10+geb; //数据合成 //lowb=(int)strtol(buffer2[i],&str,16);//低字节转换数 //highb=(int)strtol(buffer2[i+1],&str,16);//高字节转换数 shijz[ww]=highb*16*16+lowb; //数据合成 printf ( "read1=%d\n" ,shijz[ww]); } for ( i = 0; i < 250; i++) { x_data[i]=(shijz[i]*5)/1024; //换算为模拟数值 printf ( "x_data=%d\n" ,x_data[i]); } } void MyPlotter::sendFG() { /***串口初始化***/ struct termios newtio,oldtio; fd=open( "/dev/ttyS0" ,O_RDWR|O_NOCTTY|O_NDELAY); //打开串口设备文件 if (fd<0) { perror ( "open serial device error" ); exit (1); } if (fcntl(fd,F_SETFL,0)<0) perror ( "fcntl failed" ); if (isatty(STDIN_FILENO)!=0) printf ( "isatty sucess!\n" ); tcgetattr(fd,&oldtio); bzero(&newtio, sizeof (newtio)); newtio.c_cflag|=CLOCAL|CREAD; //CREAD:接收使能,CLOCAL:本地连接 newtio.c_cflag&=~CSIZE; //无位掩码 newtio.c_cflag|=CS8; //8位数据位 newtio.c_cflag&=~PARENB; //非校验位使能 cfsetispeed(&newtio,B115200); //设置输入输出波特率 cfsetospeed(&newtio,B115200); newtio.c_cflag&=~CSTOPB; //1位停止位 newtio.c_cc[VTIME]=0; newtio.c_cc[VMIN]=0; tcflush(fd,TCIFLUSH); if (tcsetattr(fd,TCSANOW,&newtio)<0) { perror ( "tcsetattr is error" ); exit (1); } /***串口写入数据***/ printf ( "begin to read:\n" ); ret = write(fd,buffer1,500 ); printf ( "ret=%d\n" , ret ); close(fd); } void MyPlotter::flushBuff() { int tmp = x_data[0]; int i; for ( i=0; i<250; i++) { x_data[i]=x_data[i+1]; } buffer[249]=tmp; repaint( 0, 0, 320, 200, TRUE); } void MyPlotter::paintEvent(QPaintEvent *) { frame->erase(0,0,frameWidth,frameHeight); painter= new QPainter(); painter->begin(frame); QPoint beginPoint; QPoint endPoint; drawHui(); painter->end(); bitBlt(frame,0,0,frame); } void MyPlotter::drawHui() { QPoint beginPoint,endPoint; int step=1; painter->setPen(red); for ( int i=0;i<250;i++) { beginPoint.setX(i*step); beginPoint.setY(frameHeight-32*x_data[i]); endPoint.setX(step+i*step); endPoint.setY(frameHeight-32*x_data[i+1]); painter->drawLine(beginPoint,endPoint); } } /* * Destroys the object and frees any allocated resources */ MyPlotter::~MyPlotter() { // no need to delete child widgets, Qt does it all for us }