config_serialport.c

////////////////////////////////////////////////////////////////////////////////
//     
//    __                                ______
//   / /_______________  ____  ___     / ____/
//  / __/ ___/ ___/ __ \/ __ \/ _ \   /___ )  
// / /_(__  ) /__/ /_/ / /_/ /  __/  ____/ /  
// \__/____/\___/\____/ .___/\___/  /_____/   
//                   /_/                      
//     
// serialport_common.c
// - function to set serial port parameters.
// - not part of Tscope5 (because of the huge number of possible parameters
//   and the difference between Windows and Posix systems).
////////////////////////////////////////////////////////////////////////////////

#ifndef TS5_WINDOWS
    #include <sys/types.h>
    #include <sys/ioctl.h>
    #include <dirent.h>
    #include <termios.h>
    #include <errno.h>

#endif


void config_serialport(TS5_SERIALPORT *portptr) 
{
#ifdef TS5_WINDOWS

     // SetCommState
    DCB dcb;
    if (!GetCommState(*portptr, &dcb)) {
        ts5_fatal("%s: GetCommState failed with error code %d\n", GetLastError());
    }

    dcb.BaudRate = 9600;
    dcb.ByteSize = (unsigned char) 8;
    dcb.Parity = 0;
    dcb.StopBits = 1;
    dcb.fBinary = 1;

    if (!SetCommState(*portptr, &dcb)) {
        ts5_fatal("%s: SetCommState failed with error code %d\n", GetLastError());
    }

    // SetCommTimeouts
    COMMTIMEOUTS ct;
    ct.ReadIntervalTimeout = MAXDWORD;
    ct.ReadTotalTimeoutMultiplier = 0;
    ct.ReadTotalTimeoutConstant = 0;
    ct.WriteTotalTimeoutMultiplier = 0;
    ct.WriteTotalTimeoutConstant = 5000;

    if (!SetCommTimeouts(*portptr, &ct)) {
        ts5_fatal("%s: SetCommTimeouts failed with error code %d\n", GetLastError());
    }

    // SetupComm
    if (!SetupComm(*portptr, 2048, 2048)) {
        ts5_fatal("%s: SetupComm failed with error code %d\n", GetLastError());
    }   


#else

    // set options for the connection
    struct termios options, oldoptions;
    tcgetattr(*portptr,
                &oldoptions);
    bzero (&options, sizeof (options));

    cfsetispeed(&options, B9600);
    cfsetospeed(&options, B9600);

    options.c_iflag = IGNBRK;
    options.c_lflag = 0;
    options.c_oflag = 0;
    options.c_cflag |= CLOCAL | CREAD;
    options.c_iflag = IGNPAR;
    options.c_oflag = 0;
    options.c_cflag &= ~(PARENB|PARODD) ;
    options.c_cflag &= ~CSTOPB ;
    options.c_cflag &= ~CSIZE;
    options.c_cflag |= CS8;
    options.c_cflag &= ~CRTSCTS;
    options.c_iflag &= ~(IXON | IXOFF | IXANY);

    if (tcsetattr (*portptr, TCSANOW, &options) == -1) {
        ts5_fatal("config_serialport: could not set options on usb serial device\n");
    }

    if (fcntl(*portptr, F_SETFL, FNDELAY) == -1) {
        ts5_fatal("config_serialport: could not set delay on usb serial device\n");
    }

#endif
}