system_printf ("couldn't set initial state for %s, %E", get_name ());
}
+ /* setting rts and dtr to known state so that ioctl() function with
+ request TIOCMGET could return correct value of RTS and DTR lines.
+ Important only for Win 9x systems */
+
+ if (wincap.is_winnt() == false)
+ {
+ if (EscapeCommFunction (get_handle (), SETDTR) == 0)
+ system_printf ("couldn't set initial state of DTR for %s, %E", get_name ());
+ if (EscapeCommFunction (get_handle (), SETRTS) == 0)
+ system_printf ("couldn't set initial state of RTS for %s, %E", get_name ());
+
+ /* even though one of above functions fail I have to set rts and dtr
+ variables to initial value. */
+ rts = TIOCM_RTS;
+ dtr = TIOCM_DTR;
+ }
+
SetCommMask (get_handle (), EV_RXCHAR);
set_open_status ();
syscall_printf ("%p = fhandler_serial::open (%s, %p, %p)",
DWORD win32action = 0;
DCB dcb;
char xchar;
-
+
termios_printf ("action %d", action);
switch (action)
return 0;
}
+
+/* ioctl: */
+int
+fhandler_serial::ioctl (unsigned int cmd, void *buffer)
+{
+
+ DWORD ev;
+ COMSTAT st;
+ DWORD action;
+ DWORD modemLines;
+ DWORD mcr;
+ DWORD cbReturned;
+ bool result;
+ int modemStatus;
+ int request;
+
+ request = *(int *) buffer;
+ action = 0;
+ modemStatus = 0;
+ if (!ClearCommError (get_handle (), &ev, &st))
+ return -1;
+ switch (cmd)
+ {
+ case TIOCMGET:
+ if (GetCommModemStatus (get_handle (), &modemLines) == 0)
+ return -1;
+ if (modemLines & MS_CTS_ON)
+ modemStatus |= TIOCM_CTS;
+ if (modemLines & MS_DSR_ON)
+ modemStatus |= TIOCM_DSR;
+ if (modemLines & MS_RING_ON)
+ modemStatus |= TIOCM_RI;
+ if (modemLines & MS_RLSD_ON)
+ modemStatus |= TIOCM_CD;
+ if (wincap.is_winnt() == true)
+ {
+
+ /* here is Windows NT or Windows 2000 part */
+ result = DeviceIoControl (get_handle (),
+ 0x001B0078,
+ NULL, 0, &mcr, 4, &cbReturned, 0);
+ if (!result)
+ return -1;
+ if (cbReturned != 4)
+ return -1;
+ if (mcr & 2)
+ modemStatus |= TIOCM_RTS;
+ if (mcr & 1)
+ modemStatus |= TIOCM_DTR;
+
+ }
+ else
+ {
+
+ /* here is Windows 9x part */
+ modemStatus |= rts | dtr;
+
+ }
+ *(int *) buffer = modemStatus;
+ return 0;
+ case TIOCMSET:
+ if (request & TIOCM_RTS)
+ {
+ if (EscapeCommFunction (get_handle (), SETRTS) == 0)
+ return -1;
+ else
+ rts = TIOCM_RTS;
+ }
+ else
+ {
+ if (EscapeCommFunction (get_handle (), CLRRTS) == 0)
+ return -1;
+ else
+ rts = 0;
+ }
+ if (request & TIOCM_DTR)
+ {
+ if (EscapeCommFunction (get_handle (), SETDTR) == 0)
+ return -1;
+ else
+ dtr = TIOCM_DTR;
+ }
+ else
+ {
+ if (EscapeCommFunction (get_handle (), CLRDTR) == 0)
+ return -1;
+ else
+ dtr = 0;
+ }
+ return 0;
+ case TIOCINQ:
+ if (ev & CE_FRAME | ev & CE_IOE | ev & CE_OVERRUN |
+ ev & CE_RXOVER | ev & CE_RXPARITY)
+ return -1;
+ *(int *) buffer = st.cbInQue;
+ return 0;
+ default:
+ return -1;
+ }
+}
+
/* tcflush: POSIX 7.2.2.1 */
int
fhandler_serial::tcflush (int queue)
COMMTIMEOUTS to;
DCB ostate, state;
unsigned int ovtime = vtime_, ovmin = vmin_;
+ int tmpDtr, tmpRts;
+ tmpDtr = tmpRts = 0;
termios_printf ("action %d", action);
if ((action == TCSADRAIN) || (action == TCSAFLUSH))
{ /* disable */
state.fRtsControl = RTS_CONTROL_ENABLE;
state.fOutxCtsFlow = FALSE;
+ tmpRts = TIOCM_RTS;
}
if (t->c_cflag & CRTSXOFF)
set_w_binary ((t->c_oflag & ONLCR) ? 0 : 1);
if (dropDTR == TRUE)
- EscapeCommFunction (get_handle (), CLRDTR);
+ {
+ EscapeCommFunction (get_handle (), CLRDTR);
+ tmpDtr = 0;
+ }
else
{
/* FIXME: Sometimes when CLRDTR is set, setting
parameters while DTR is still down. */
EscapeCommFunction (get_handle (), SETDTR);
+ tmpDtr = TIOCM_DTR;
}
+
+ rts = tmpRts;
+ dtr = tmpDtr;
/*
The following documentation on was taken from "Linux Serial Programming