+++ /dev/null
-/*
- *
- * Copyright 2019 AT&T Intellectual Property
- * Copyright 2019 Nokia
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-//
-// arduino-serial-lib -- simple library for reading/writing serial ports
-//
-// 2006-2013, Tod E. Kurt, http://todbot.com/blog/
-//
-
-#include "arduino-serial-lib.h"
-
-#include <stdio.h> // Standard input/output definitions
-#include <unistd.h> // UNIX standard function definitions
-#include <fcntl.h> // File control definitions
-#include <errno.h> // Error number definitions
-#include <termios.h> // POSIX terminal control definitions
-#include <string.h> // String function definitions
-#include <sys/ioctl.h>
-
-// uncomment this to debug reads
-//#define SERIALPORTDEBUG
-
-// takes the string name of the serial port (e.g. "/dev/tty.usbserial","COM1")
-// and a baud rate (bps) and connects to that port at that speed and 8N1.
-// opens the port in fully raw mode so you can send binary data.
-// returns valid fd, or -1 on error
-int serialport_init(const char* serialport, int baud)
-{
- struct termios toptions;
- int fd;
-
- //fd = open(serialport, O_RDWR | O_NOCTTY | O_NDELAY);
- fd = open(serialport, O_RDWR | O_NONBLOCK );
-
- if (fd == -1) {
- perror("serialport_init: Unable to open port s");
- return -1;
- }
-
- //int iflags = TIOCM_DTR;
- //ioctl(fd, TIOCMBIS, &iflags); // turn on DTR
- //ioctl(fd, TIOCMBIC, &iflags); // turn off DTR
-
- if (tcgetattr(fd, &toptions) < 0) {
- perror("serialport_init: Couldn't get term attributes");
- return -1;
- }
- speed_t brate = baud; // let you override switch below if needed
- switch(baud)
- {
- case 4800: brate=B4800; break;
- case 9600: brate=B9600; break;
- #ifdef B14400
- case 14400: brate=B14400; break;
- #endif
- case 19200: brate=B19200; break;
- #ifdef B28800
- case 28800: brate=B28800; break;
- #endif
- case 38400: brate=B38400; break;
- case 57600: brate=B57600; break;
- case 115200: brate=B115200; break;
- }
- cfsetispeed(&toptions, brate);
- cfsetospeed(&toptions, brate);
-
- // 8N1
- toptions.c_cflag &= ~PARENB;
- toptions.c_cflag &= ~CSTOPB;
- toptions.c_cflag &= ~CSIZE;
- toptions.c_cflag |= CS8;
- // no flow control
- toptions.c_cflag &= ~CRTSCTS;
-
- //toptions.c_cflag &= ~HUPCL; // disable hang-up-on-close to avoid reset
-
- toptions.c_cflag |= CREAD | CLOCAL; // turn on READ & ignore ctrl lines
- toptions.c_iflag &= ~(IXON | IXOFF | IXANY); // turn off s/w flow ctrl
-
- toptions.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); // make raw
- toptions.c_oflag &= ~OPOST; // make raw
-
- // see: http://unixwiz.net/techtips/termios-vmin-vtime.html
- toptions.c_cc[VMIN] = 0;
- toptions.c_cc[VTIME] = 0;
- //toptions.c_cc[VTIME] = 20;
-
- tcsetattr(fd, TCSANOW, &toptions);
- if( tcsetattr(fd, TCSAFLUSH, &toptions) < 0) {
- perror("init_serialport: Couldn't set term attributes");
- return -1;
- }
-
- return fd;
-}
-
-//
-int serialport_close( int fd )
-{
- return close( fd );
-}
-
-//
-int serialport_writebyte( int fd, uint8_t b)
-{
- int n = write(fd,&b,1);
- if( n!=1)
- return -1;
- return 0;
-}
-
-//
-int serialport_write(int fd, const char* str)
-{
- int len = strlen(str);
- int n = write(fd, str, len);
- if( n!=len ) {
- perror("serialport_write: couldn't write whole string\n");
- return -1;
- }
- return 0;
-}
-
-//
-int serialport_read_until(int fd, char* buf, char until, int buf_max, int timeout)
-{
- char b[1]; // read expects an array, so we give it a 1-byte array
- int i=0;
- do {
- int n = read(fd, b, 1); // read a char at a time
- if( n==-1) return -1; // couldn't read
- if( n==0 ) {
- usleep( 1 * 1000 ); // wait 1 msec try again
- timeout--;
- if( timeout==0 ) return -2;
- continue;
- }
-#ifdef SERIALPORTDEBUG
- fprintf(stderr, "serialport_read_until: i=%d, n=%d b='%c'\n",i,n,b[0]); // debug
-#endif
- buf[i] = b[0];
- i++;
- } while( b[0] != until && i < buf_max && timeout>0 );
-
- buf[i] = 0; // null terminate the string
- return 0;
-}
-
-//
-int serialport_flush(int fd)
-{
- sleep(2); //required to make flush work, for some reason
- return tcflush(fd, TCIOFLUSH);
-}