bug? serial port raw input mode dependent on processing flags?

[Dennis Rimington <drimington@ucsd.edu>]

To Debian Users,

	I currently am using the 2.6 verions kernel on sarge.(all standard 
software packages)
	I am not sure this is debian related, gnu related, or i just dont 
understand things very well.
	I was having a rather odd serial port data problem.
	The code was written in C with the gnuC compiler.

	At the heart of the problem, i was setting up a serial port for raw input 
mode(as opposed to canonical).
	My understanding of raw mode as:
"Raw input is unprocessed. Input characters are passed through exactly as 
they are received, when they are received. "
	as according to http://www.easysw.com/~mike/serial/serial.html
	which is a very useful reference regarding serial ports.

	Anyway 0x0d carriage returns were being processed and replaced with 0x0a 
line feeds.
	while, the following line with ICRNL turned off fixes my problem
	options.c_iflag &= ~(IXON | IXOFF | IXANY | ICRNL);	

	I am thinking i should not have had to add the ICRNL flag bit turned off 
due to my original setting of "raw input mode".
	The whole configuration i used was is at the bottom of the page.
	
	Anyway, if this is just a misunderstanding on my part regarding the raw 
input mode type, i apologize for wasting your 	time.

thanks
Dennis



/*void serialConfigure*/
void serialConfigure(int fileDescriptor)
{	struct termios options;
	fcntl(fileDescriptor,F_SETFL,FNDELAY);//force immediate return of read.
	//configure the port some more.
	tcgetattr(fileDescriptor,&options);	//get the current options
	
	cfsetispeed(&options,B38400);		//set the baud rates
	cfsetospeed(&options,B38400);
	options.c_cflag |= (CLOCAL | CREAD);
	options.c_cflag &= ~PARENB;			//no parity,8bits,1stop
	options.c_cflag &= ~CSTOPB;
	options.c_cflag &= ~CSIZE;
	options.c_cflag |= CS8;
	options.c_cflag &= ~CRTSCTS;			//dis hw flow
	
	//options.c_iflag &= ~(IXON | IXOFF | IXANY | ICRNL);
	//see that one on the end ICRNL
	//that one sucked a day of my life away.(i thought these options were only 
for canonical mode
	//which i am not using....but you cant argue with results..!
	
	options.c_iflag &= ~(IXON | IXOFF | IXANY | ICRNL);	//
	//options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
	options.c_lflag &= ~(ICANON | ISIG | ECHO | ECHONL | ECHOE | ECHOK);
	options.c_oflag &= ~OPOST;
	tcsetattr(fileDescriptor, TCSANOW, &options);	//Set the new options for 
the port...	
	return;
}