User`s manual

Serial Programming Tools
Intellio C320Turbo/PCI User's Manual 4-7
3. MTCRTS
This function, only valid when hardware flow control is turned off (see
MHWFLOW), is used to turn RTS on or off.
Syntax for SCO UNIX/XENIX
#define MTCRTS 0x403
#define TurnON 1
#define TurnOFF 0
ioctl(moxa_fd, MTCRTS, TurnON);
ioctl(moxa_fd, MTCRTS, TurnOFF);
Syntax for UNIX SVR4
#include <sys/stropts.h>
#include <sys/sysmacros.h>
#define MTCRTS 0x403
#define TurnON 1
#define TurnOFF 0
struct strioctl ioc;
int setting;
setting = TurnON /* or TurnOFF */;
ioc.ic_cmd = MTCRTS;
ioc.ic_timout = 0;
ioc.ic_len = sizeof(int);
ioc.ic_dp = (char *)&setting;
ioctl(moxa_fd, I_STR, &ioc);
4. MTCDTR
This function, only valid when hardware flow control is turned off (see
MHWFLOW), is used to turn DTR on or off.
Syntax for SCO UNIX/XENIX
#define MTCDTR 0x404
#define TurnON 1
#define TurnOFF 0
ioctl(moxa_fd, MTCDTR, TurnON);
ioctl(moxa_fd, MTCDTR, TurnOFF);