qt串口操作例程

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1、[mainwindow.cpp]#include   #include #include #include#include#include#include#include#include#include"mainwindow.h"  #include"serialthread.h"  voidMa

2、inWindow::paintEvent(QPaintEvent*){  QPainterpaint(this);  paint.drawLine(0,0,500,500);//drawline    paint.drawPixmap(0,0,*pix);    }voidMainWindow::loadJPEGFile(){     if(!pix->load("testjpeg")){  //if(!pix->load("circle")){    setMsgText("Loadfailed");  

3、  return;  }  setMsgText("Loadsuccess!");  update();    }voidMainWindow::setCounter(intno){  counter=no;}voidMainWindow::serialOperate(){ a=newSerialThread(this);  a->start();  a->wait();}MainWindow::MainWindow(QWidget*parent,constchar*name)  :QMainWindow(

4、parent,name){      counter=0;        QVBox*vbox;    vbox=newQVBox(this);    vbox->resize(300,150);    //msg=newQLabel("SERIALPROGRAMMING",vbox);    msg=newQLineEdit("SERIALPROGRAMMING",vbox);    msg->resize(300,50);        pix=new  QPixmap();              

5、 btn=newQPushButton(vbox);    btn->setText("GO!");    QApplication::connect(btn,SIGNAL(clicked()),this,SLOT(serialOperate()));    btn2LoadImg=newQPushButton(vbox);    btn2LoadImg->setText("LOAD");        lab=newQLabel("beforeloadjpeg",vbox);    QApplicatio

6、n::connect(btn2LoadImg,SIGNAL(clicked()),this,SLOT(loadJPEGFile()));        //btn->resize(100,75);    //vbox->show();};voidMainWindow::setMsgText(char*txt){    QStringmsgs(txt);    QStringcount=QString::number(counter,10);    msgs.append(count);    const  

7、char*re=msgs.ascii();         //strcat(msgs,);    msg->setText(re);  };[my_define.h]#defineBAUDRATE  B115200#defineBLOCK_SIZE  200  #defineDEVICE    "/dev/ttyS0"#defineWAIT_TIME  5#defineCHANGE_LINE  0x0a#defineACK_NUM  3#ifndefTRUE#defineTRUE1#endif#ifnd

8、efFALSE#defineFALSE-1#endif[serialthread.h]#ifndefSERIAL_THREAD_H#define SERIAL_THREAD_H#includeclassMainWindow;classSerialThread:publicQThread{public:  SerialThread(MainWindow*parent);  virtualvoi