C/C++-Quelltext

int mm=open("/dev/ttyS0", O_RDWR | O_NOCTTY | O_NDELAY);

C/C++-Quelltext

char *buffer;
char pos1,pos2;
char* szData;
int main()
{
int rs232ali=open("/dev/ttyS0", O_RDWR | O_NOCTTY | O_NDELAY);
if (rs232ali == -1 )
{
perror("open_port: Unable to open /dev/ttyS0 - ");
}
else
{
printf("Port RS232 has been sucessfully opened and %d is the file description\n",rs232ali);
}
szData="1MS";
write( rs232ali, szData, sizeof(szData));
pos1=read(rs232ali,buffer,10);
printf("Motor Status: Achse 1 ist %d \n",pos1);
close(rs232ali);
}

C/C++-Quelltext

#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <termios.h>
#include <unistd.h>
#include <iostream>
#include <errno.h>

using namespace std;

char *buffer;
char* szData;
int write_size=0,read_size=0;

int main()

{
int rs232ali=open("/dev/ttyS0", O_RDWR | O_NOCTTY | O_NONBLOCK);
if (rs232ali == -1 ) { perror("open_port: Unable to open /dev/ttyS0"); }
 else { printf("Port RS232 has been sucessfully opened and %d is the value of open()\n",rs232ali); }
szData="1TP";
cout<<"folgender Befehl wird gesendet: "<<szData<<endl;
write_size=write( rs232ali, szData, sizeof(szData));
cout<<"Bytes written: write_size="<<write_size<<endl;
if(write_size==-1) { printf( "Error writing: %s\n", strerror( errno ) );}
read_size=read(rs232ali,buffer,10);
if(read_size==-1) { printf( "Error reading: %s\n", strerror( errno ) );cout<<"Buffer= "<<buffer<<endl;}
else {cout<<"Bytes read: read_size="<<read_size<<endl;printf("Position Achse1 = %d\n",buffer);}
close(rs232ali);
}

C/C++-Quelltext

#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <termios.h>
#include <unistd.h>
#include <iostream>
#include <time.h>

using namespace std;

char *buffer;
char* szData;
int write_size=0,read_size=0;

int main()

{
  int rs232ali=open("/dev/ttyS0", O_RDWR | O_NOCTTY | O_NONBLOCK);
  if (rs232ali == -1 ) { perror("open_port: Unable to open /dev/ttyS0"); }
  else { printf("Port RS232 has been sucessfully opened and %d is the value of open()\n",rs232ali); }
  szData="MR\n";
  cout<<"folgender Befehl wird gesendet: "<<szData<<endl;

 
  write_size=write( rs232ali, szData, sizeof(szData));
  if(write_size==-1) { printf( "Error writing: %s\n", strerror( errno ) );}
  else {  cout<<"Bytes written: write_size="<<write_size<<endl;}

  for(int e=0;e<1e7;e++){}
  cout << "rs232ali = "<<rs232ali << endl;
  
  //read_size=read("/dev/ttyS0",buffer,10);
  read_size=read(rs232ali,buffer,10);
  if(read_size==-1) { printf( "Error reading: %s\nBuffer= %s\n", strerror( errno ),buffer);}
  else {cout<<"Bytes read: read_size="<<read_size<<endl;printf("Position Achse1 = %d\n",buffer);}
 
  close(rs232ali);
}