User`s manual

Table Of Contents

Serial Programming Tools

Intellio C320Turbo/PCI User's Manual 4-9

Syntax for SCO UNIX/XENIX

#define MLOWATER 0x405

int lowater; /* low water value of output buffer (default = 512 bytes) */

ioctl(moxa_fd, MLOWATER, lowater);

Syntax for UNIX SVR4

#include <sys/stropts.h>

#include <sys/sysmacros.h>

#define MLOWATER 0x405

struct strioctl ioc;

int lowater; /* low water value of output buffer (default = 512 bytes) */

ioc.ic_cmd = MLOWATER;

ioc.ic_timout = 0;

ioc.ic_len = sizeof(int);

ioc.ic_dp = (char *)&lowater;

ioctl(moxa_fd, I_STR, &ioc);

6. MSTATUS

This function is used to know the RS-232 line status (CTS/DSR/DCD).

Syntax for SCO UNIX/XENIX

#define MSTATUS 0x407

int status; /* status = RS-232 line status*/

/* bit0－CTS (1:on, 0:off)*/

/* bit1－DSR (1:on, 0:off)*/

/* bit2－DCD (1:on, 0:off)*/

ioctl(moxa_fd, MSTATUS, &status);