Hi,
I am attempting to communicate with a device.
I use the folowing write and read commands. The write appears to work
in that the device responds correctly to the appropriate command sent.
The read command always returns a -1.
i=write(fd_com,cSendBuf,iSendLen);
sleep(1);
iReturnLen=read(fd_com,cRecBuf,6);
int comm_init ()
{
struct termios termConf;
bzero (&termConf, sizeof (struct termios));
tcgetattr(fd_com, &termConf);
termConf.c_cflag = B38400 | CREAD | CLOCAL;
termConf.c_cflag |= PARENB;
termConf.c_cflag &= ~PARODD;
termConf.c_cflag &= ~CSIZE;
termConf.c_cflag |= CS8;
termConf.c_cflag |= CRTSCTS;
fd_com = open(PORT, O_RDWR | O_NOCTTY | O_NDELAY);
if (fd_com < 0)
{
return FAILURE;
}
tcsetattr(fd_com, TCSADRAIN, &termConf); // Set the new options for
the port...
return SUCCESS;
}
-----------------------------------------------------
So what are you trying to do?
I don't understand what you mean by "read commands"?
did you write a program to use COM2, or are you trying to use
it as a login port?
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