Hello. My problem is that when I try to read the serial port I don't receive any data from my PC. I configured the ports, as seen in the attached file. And the error that I get with perror's function in read is "Resource temporally unavailable". Besides, I've noticed that when I run the program (attached file) the configuration that I have made him to serial ports is not done, because I'm connected via ssh to the IP of ConectCore 9c and I do an instruction of the system to know the configuration of the port and I get different speed, input, etc
Note:I have also tested with FD_ZERO, FD_SET, and the function "select"
struct termios options;
fd = open("/dev/ttyS0", O_RDWR | O_NOCTTY | O_NDELAY);
fcntl(fd, F_SETFL, 0);
options.c_cflag |= (CLOCAL | CREAD);
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;
tcsetattr(fd, TCSANOW, &options);
nbytes = read(fd, buf,255);
Thank you very much. I await your response.