problem with read from file descriptor

[Antharax]

I would write the initialisation sequence like this:

Serial::Serial(char *device_name)
{
  struct termios options;

  fd = open(device_name, O_RDWR | O_NOCTTY | O_NDELAY);
  if (fd < 0)
    {
      exit(1);
    }

  fcntl(fd, F_SETFL, 0);

  // Get the current options for the port...
  tcgetattr(fd, &options);

  // Set the baud rates to 9600...
  cfsetispeed(&options, B9600);
  cfsetospeed(&options, B9600);

  // Adjust settings to required...
  options.c_cflag |= ( CLOCAL | CREAD );
  // No parity (8N1):
  options.c_cflag &= ~PARENB;
  options.c_cflag &= ~CSTOPB;
  options.c_cflag &= ~CSIZE;
  options.c_cflag |= CS8;

  options.c_lflag &= ~( ICANON | ECHO | ECHOE | ISIG );
  options.c_oflag &= ~OPOST;
  options.c_cc[VMIN] = 0;
  options.c_cc[VTIME] = 50;

  // Set the new options for the port...
  tcsetattr(fd, TCSANOW, &options);
}

and it's
while ((nbytes = read(fd, &response[writePos], BUFFERSIZE - writePos)) > 0)

 

[DCO_81]

Well done, buddy

 

[Antharax]

does it work now?

 

[DCO_81]

Yepp! And I needed to add tcflush too, cause some garbage from prior starts where on the line.