udooserialexample.cpp

#include <stdio.h>      // standard input / output functions
#include <stdlib.h>
#include <string.h>     // string function definitions
#include <unistd.h>     // UNIX standard function definitions
#include <fcntl.h>      // File control definitions
#include <errno.h>      // Error number definitions
#include <iostream>
#include <fstream>
#include <termios.h>    // POSIX terminal control definitions
using namespace std;
int length(char strname []);
int main()
{
/* Open File Descriptor */

    int USB = open( "/dev/ttymxc3", O_RDWR| O_NONBLOCK | O_NDELAY );
/* Error Handling */
if ( USB < 0 )
{
    cout << "Error " << errno << " opening " << "/dev/ttymxc3" << ": " << strerror (errno) << endl;
}

/* *** Configure Port *** */
struct termios tty;
memset (&tty, 0, sizeof tty);
struct tm * timeinfo;
char buffer [80];
time_t rawtime;
/* Error Handling */
if ( tcgetattr ( USB, &tty ) != 0 )
{
    cout << "Error " << errno << " from tcgetattr: " << strerror(errno) << endl;
}

/* Set Baud Rate */
cfsetospeed (&tty, B9600);

/* Setting other Port Stuff */
tty.c_cflag     &=  ~PARENB;        // Make 8n1
tty.c_cflag     &=  ~CSTOPB;
tty.c_cflag     &=  ~CSIZE;
tty.c_cflag     |=  CS8;
tty.c_cflag     &=  ~CRTSCTS;       // no flow control
tty.c_lflag     =   0;          // no signaling chars, no echo, no canonical processing
tty.c_oflag     =   0;                  // no remapping, no delays
tty.c_cc[VMIN]      =   0;                  // read doesn't block
tty.c_cc[VTIME]     =   5;                  // 0.5 seconds read timeout

tty.c_cflag     |=  CREAD | CLOCAL;     // turn on READ & ignore ctrl lines
tty.c_iflag     &=  ~(IXON | IXOFF | IXANY);// turn off s/w flow ctrl
tty.c_lflag     &=  ~(ICANON | ECHO | ECHOE | ISIG); // make raw
tty.c_oflag     &=  ~OPOST;              // make raw

/* Flush Port, then applies attributes */
tcflush( USB, TCIFLUSH );

if ( tcsetattr ( USB, TCSANOW, &tty ) != 0)
{
    cout << "Error " << errno << " from tcsetattr" << endl;
}

/* *** WRITE *** */
int length1;
unsigned char cmd[] = {'I', 'N', 'I', 'T', ' ', '\r', '\0'};
int n_written = write( USB, cmd, sizeof(cmd) -1 );

/* Allocate memory for read buffer */
char buf [256];
memset (&buf, '\0', sizeof buf);
while(true)
{
    ofstream sensorData("sensor.log",ios::app);
/* *** READ *** */
int n = read( USB, &buf , sizeof buf );

/* Error Handling */
if (n < 0)
{
    cout << "Error reading: " << strerror(errno) << endl;
}

cout << "Read: " << buf << endl;
length1=length(buf);
if(length1>0)
    {time(&rawtime);
      timeinfo = localtime (&rawtime);
      strftime (buffer,80,"%F-%I-%M-%S ",timeinfo);
      sensorData<<buffer<<buf;
      sensorData.close(); 

   }
      sleep(1);
}
close(USB);
}

int length(char strname [])
{int i=0;
 while(strname[i]!='\0')
              {i++;
               }
 return i;
}