by Elson Cha » Sat, 14 Feb 1998 04:00:00
I've been going to develop a C program to do the communication of a data
device to UNIX through a serial line. My environment is Sun Solaris
2.4. The communication is two-way. The data device will response by
get request from UNIX through the line.
Can anyone give me a simple program to start with or suggestions or
guidelines.
Thanks
Elson Chan
1. Need help w/serial communication under interactive unix
I'm trying to do serial communication between a computer running dos and
one running Interactive Unix. The problem is that I can't find out how
to enable RTS/CTS (hardware) handshaking for the port.
This is the initialization code i use:
int com_init(void)
{
struct termio tio;
int rc;
int com; /* Serial port file descriptor */
com = open("/dev/ttyd0", O_RDWR);
rc = ioctl(com, TCGETA, &tio);
if (rc == -1)
return 0;
tio.c_cflag = B9600 | CREAD | CS8;
tio.c_iflag = 0;
tio.c_oflag = 0;
tio.c_lflag = 0;
tio.c_line = 0;
rc = ioctl(com, TCSETA, &tio);
if (rc == -1)
return 0;
tcflush(com, TCIOFLUSH);
return com;
I first wrote this code for linux. Linux had a CRTSCTS flag which I
could set in tio.c_cflag to enable hardware handshaking. Unfortuately I
am forced to run the application under Interactive Unix.
Any help is appreciated.
Morten.
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