Re: [ts-7000] com 3 in 7800

[vigu <>]

thanks a lot .. but when i read data it returned me -1. is there
something wrong in what i'm doing. i'm sorry am very new to serial
programming. here is the code

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

int initComm() {

        int fd;
        struct termios options;

        // Open the RS232 port
        fd = open("/dev/ttts4", O_RDWR | O_NOCTTY );
        if(fd == -1) {
#ifdef DEBUG
                printf("Could not open the comm port.\r\n");
#endif
                return fd;
        }

        // Clear the flags
        fcntl(fd, F_SETFL, 0);

        // Get the port options
  tcgetattr(fd, &options);
 // Set the speed
        cfsetispeed(&options, B9600);
        cfsetospeed(&options, B9600);

        // Set the comm flags (115200 8N1)
        options.c_cflag = B9600 | CS8 | CLOCAL | CREAD;
        options.c_iflag = 0;
        options.c_oflag = 0;
        options.c_lflag = 0;

        // Set the timeout to be 1000ms
        options.c_cc[VMIN] = 0;
        options.c_cc[VTIME] = 10;

        // Save these settings
        tcsetattr(fd, TCSANOW, &options);

        // Flush the settings
        tcflush(fd, TCIFLUSH);
        tcflush(fd, TCOFLUSH);

        return fd;

}

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