User`s manual

4-10 Intellio C320Turbo User's Manual
#define MSTATUS 0x407
#include <sys/stropts.h>
#include <sys/sysmacros.h>
struct strioctl ioc;
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) */
ioc.ic_cmd = MSTATUS;
ioc.ic_timout = 0;
ioc.ic_len = sizeof(int);
ioc.ic_dp = (char *)&status;
ioctl(moxa_fd, I_STR, &ioc);
7. MHWFLOW
This function is used to enable/disable hardware flow control. The first open()
function of a port will set the hardware flow control bits on or off depending on
the [RTS/CTS Hardware Flow Control] configuration in moxaadm. However,
users might want to control the DTR or RTS signal on their will, thus the RTS
flow control bit should be turned off (HWFLowControlOff) in order to take over
the control of DTR or RTS signal via function MTCRTS or MTCDTR. MTCRTS
and MTCDTR can be effective only after the RTS flow control bit is turned off.
Syntax for SCO UNIX/XENIX
#define MHWFLOW 0x40e
#define HWFlowControlOff 0x00
#define CTSFlowControlBitOn 0x01
#define RTSFlowControlBitOn 0x02
#define HWFlowControlOn 0x03
ioctl(moxa_fd, MHWFLOW, CTSFlowControlBitOn);
ioctl(moxa_fd, MHWFLOW, RTSFlowControlBitOn);
ioctl(moxa_fd,MHWFLOW, CTSFlowControlBitOn | RTSFlowControlBitOn);
Syntax for SVR4.x UNIX/Solaris x86
#include <sys/stropts.h>
#include <sys/sysmacros.h>
#define MHWFLOW 0x40e
#define HWFlowControlOff 0x00