linux下的rs232测试程序

#include<QtGui> #include"serial.h" #define WORDLEN 32 int speed_arr[] = { B38400, B19200, B9600, B4800, B2400, B1200, B300, B38400, B19200, B9600, B4800, B2400, B1200, B300, }; int name_arr[] = {38400, 19200, 9600, 4800, 2400, 1200, 300, 38400, 19200, 9600, 4800, 2400, 1200, 300, }; //char *dev ="/dev/s3c2410_serial1"; char *dev ="/dev/ttyUSB0"; Mythread::Mythread(void *arg) { qDebug()<<"read start"; s = (SerialDialog*)arg; } void Mythread::run() { int nread; char buff[1],suff[10]; QString str; memset(buff,0,1); memset(suff,0,10); while(1) { qDebug()<<"-----------------------"; if((nread = read(s->fd,buff,1))>0) { str += buff; qDebug()<<"-------aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa----------------"; memset(buff,0,1); if(str.length() == 50 ) { qDebug()<<str; showread(str); str.clear(); } } qDebug()<<str; } } Mythread::~Mythread() { } SerialDialog::SerialDialog(QWidget *parent):QDialog(parent) { setupUi(this); textEdit->setText("hello world"); connect(pbsend,SIGNAL(clicked()),this,SLOT(sendMessage())); connect(pbclose,SIGNAL(clicked()),this,SLOT(close())); readmessage(); readth(); } void SerialDialog::readth() { p = new Mythread(this); connect(p,SIGNAL(showread(QString)),this,SLOT(setread(QString))); p->start(); } void SerialDialog::readmessage() { fd = OpenDev(dev); if (fd>0) set_speed(fd,19200); else { printf("Can't Open Serial Port!\n"); exit(0); } if (set_Parity(fd,8,1,'N')== FALSE) { printf("Set Parity Error\n"); exit(1); } } void SerialDialog::sendMessage() { qDebug()<<"send message!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"; char buf1[10]; memset(buf1,0,10); QString s = lineEdit->text(); strncpy(buf1,s.toLocal8Bit().data(),10); int n = write(fd,buf1,sizeof(buf1)); qDebug()<<n<<buf1; } SerialDialog::~SerialDialog() { } void SerialDialog::set_speed(int fd, int speed) { int i; int status; struct termios Opt; tcgetattr(fd, &Opt); for ( i= 0; i < sizeof(speed_arr) / sizeof(int); i++) { if (speed == name_arr[i]) { tcflush(fd, TCIOFLUSH); cfsetispeed(&Opt, speed_arr[i]); cfsetospeed(&Opt, speed_arr[i]); status = tcsetattr(fd, TCSANOW, &Opt); if (status != 0) perror("tcsetattr fd1"); return; } tcflush(fd,TCIOFLUSH); } } int SerialDialog::set_Parity(int fd,int databits,int stopbits,int parity) { struct termios options; if ( tcgetattr( fd,&options) != 0) { perror("SetupSerial 1"); return(FALSE); } options.c_cflag &= ~CSIZE; switch (databits) /*设置数据位数*/ { case 7: options.c_cflag |= CS7; break; case 8: options.c_cflag |= CS8; break; default: fprintf(stderr,"Unsupported data size\n"); return (FALSE); } switch (parity) { case 'n': case 'N': options.c_cflag &= ~PARENB; /* Clear parity enable */ options.c_iflag &= ~INPCK; /* Enable parity checking */ break; case 'o': case 'O': options.c_cflag |= (PARODD | PARENB); /* 设置为奇效验*/ options.c_iflag |= INPCK; /* Disnable parity checking */ break; case 'e': case 'E': options.c_cflag |= PARENB; /* Enable parity */ options.c_cflag &= ~PARODD; /* 转换为偶效验*/ options.c_iflag |= INPCK; /* Disnable parity checking */ break; case 'S': case 's': /*as no parity*/ options.c_cflag &= ~PARENB; options.c_cflag &= ~CSTOPB; break; default: fprintf(stderr,"Unsupported parity\n"); return (FALSE); } /* 设置停止位*/ switch (stopbits) { case 1: options.c_cflag &= ~CSTOPB; break; case 2: options.c_cflag |= CSTOPB; break; default: fprintf(stderr,"Unsupported stop bits\n"); return (FALSE); } /* Set input parity option */ if (parity != 'n') options.c_iflag |= INPCK; options.c_cc[VTIME] = 150; // 15 seconds options.c_cc[VMIN] = 0; tcflush(fd,TCIFLUSH); /* Update the options and do it NOW */ if (tcsetattr(fd,TCSANOW,&options) != 0) { perror("SetupSerial 3"); return (FALSE); } return (TRUE); } int SerialDialog::OpenDev(char *Dev) { int fd = ::open(Dev,O_RDWR|O_NOCTTY |O_NDELAY|O_NONBLOCK); if (-1 == fd) { /*设置数据位数*/ perror("Can't Open Serial Port"); return -1; } return fd; } void SerialDialog::setread(QString s) { textEdit->setText(s); qDebug()<<"buff="<<s; }