?? tty.c
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/*************************************************************************** * tty.c * * Mon May 21 18:08:43 2007 * Copyright 2007 kf701 * Email <kf701.ye AT gmail.com> ****************************************************************************//* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include <termios.h>#include <errno.h>#include "kf701.h"/** * @brief set tty speed * @param fd from open tty * @param speed 115200,38400,9600... */bool set_speed(int fd, int speed){ speed_t speed_arr[] = { B230400, B115200, B57600, B38400, B19200, B9600, B4800, B2400, B1200, B300, }; int name_arr[] = { 230400, 115200, 57600, 38400, 19200, 9600, 4800, 2400, 1200, 300, }; 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) { sys_message("%s,%d: tcsetattr error\n",__FILE__,__LINE__); return false; } tcflush(fd,TCIOFLUSH); } } return true;}/** * @brief set tty databit stopbit and parity * @param fd from open tty * @param databits 7 or 8 * @param stopbits 1 or 2 * @param parity N,E,O,S */bool set_parity(int fd,int databits,int stopbits,int parity){ struct termios options; if ( tcgetattr( fd,&options) != 0) { sys_message("%s,%d: SetupSerial error\n",__FILE__,__LINE__); return false; } options.c_cflag &= ~CSIZE; switch (databits) { case 7: options.c_cflag |= CS7; break; case 8: options.c_cflag |= CS8; break; default: sys_message("%s,%d: Unsupported data size\n",__FILE__,__LINE__); 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); /* set odd */ options.c_iflag |= INPCK; /* Disnable parity checking */ break; case 'e': case 'E': options.c_cflag |= PARENB; /* Enable parity */ options.c_cflag &= ~PARODD; /* convert to enev */ 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: sys_message("%s,%d: Unsupported parity\n",__FILE__,__LINE__); return false; } /* set stopbit */ switch (stopbits) { case 1: options.c_cflag &= ~CSTOPB; break; case 2: options.c_cflag |= CSTOPB; break; default: sys_message("%s,%d: Unsupported stop bits\n",__FILE__,__LINE__); return false; } /* Set input parity option */ if (parity != 'n') options.c_iflag |= INPCK; tcflush(fd,TCIFLUSH); options.c_cc[VTIME] = 150; /* set time out 15 seconds*/ options.c_cc[VMIN] = 0; /* Update the options and do it NOW */ if (tcsetattr(fd,TCSANOW,&options) != 0) { sys_message("%s,%d: SetupSerial error\n",__FILE__,__LINE__); return false; } return true;}
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