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/****************************************************************
Copyright (C) 1986-2000 by
F6FBB - Jean-Paul ROUBELAT
6, rue George Sand
31120 - Roquettes - France
jpr@f6fbb.org
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Parts of code have been taken from many other softwares.
Thanks for the help.
****************************************************************/
/*
* WATCHDOG.C
*
*/
#include <serv.h>
static int watch_option = 0;
#ifdef __WINDOWS__
#ifdef __WIN32__
static HANDLE watchfd;
#else
static int watchfd;
#endif
#endif /* WINDOWS */
/***************************************
* Specifie un port pour le watchdog :
* 0 = rien
* 1 = lpt1
* 2 = lpt2
* etc...
* 81 = com1
* 82 = coim2
* etc...
****************************************/
void init_watchdog (int val)
{
#ifdef __WINDOWS__
char str[80];
DCB dcb;
int error;
if (val == 0)
return;
if (val > 80)
wsprintf (str, "LPT%d", val - 80);
else
wsprintf (str, "COM%d", val);
#ifdef __WIN32__
watchfd = CreateFile (str, GENERIC_READ | GENERIC_WRITE,
0, // exclusive access
NULL, // no security attrs
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED,
NULL);
if (watchfd == INVALID_HANDLE_VALUE)
return;
#else
watchfd = OpenComm (str, 64, 64);
if (watchfd < 0)
{
/* Erreur ouverture COM */
char title[80];
wsprintf (title, "Error Watchdog %d", val);
ShowError (title, "OpenComm :", 0);
return;
}
#endif
if (val < 80)
{
memset ((char *) &dcb, '\0', sizeof (DCB));
wsprintf (str, "COM%d:9600,n,8,1", val);
error = BuildCommDCB (str, &dcb);
#ifdef __WIN32__
error = SetCommState (watchfd, &dcb);
#else
error = SetCommState (&dcb);
#endif
}
watch_option = val;
#endif
}
void end_watchdog (void)
{
#ifdef __WINDOWS__
int ret;
if (!watch_option)
{
return;
}
#ifdef __WIN32__
if (watchfd != INVALID_HANDLE_VALUE)
{
// EscapeCommFunction (ptrcom->comfd, SETXON);
if (!CloseHandle (watchfd))
{
char title[80];
wsprintf (title, "Error watchdog %d", watch_option);
ShowError (title, "CloseComm :", ret);
}
watchfd = INVALID_HANDLE_VALUE;
}
#else
if (watchfd != -1)
{
if ((ret = CloseComm (watchfd)) < 0)
{
char title[80];
wsprintf (title, "Error watchdog %d", watch_option);
ShowError (title, "CloseComm :", ret);
}
watchfd = -1;
}
#endif
#endif
watch_option = 0;
}
void watchdog (void)
{
#ifdef __WINDOWS__
time_t temps;
static int car = 0;
static time_t prev = 0;
int nb;
int err;
if (!watch_option)
{
return;
}
temps = time (NULL);
if (temps == prev)
return;
prev = temps;
car = !car;
#ifdef __WIN32__
{
DWORD lpErrors = 0L;
char title[80];
/* Get the first spurious error */
ClearCommError (watchfd, &lpErrors, NULL);
ClearCommError (watchfd, &lpErrors, NULL);
if (lpErrors & (CE_PTO | CE_IOE | CE_DNS))
{
wsprintf (title, "Error watchdog %d", watch_option);
ShowError (title, "Device not ready, watchdog disabled :", lpErrors);
end_watchdog ();
return;
}
}
if (!WriteFile (watchfd, &car, 1, &nb, NULL))
{
char title[80];
wsprintf (title, "Error watchdog %d", watch_option);
ShowError (title, "WriteComm :", nb);
return;
}
#else
nb = WriteComm (watchfd, &car, 1);
if (nb < 0)
{
char title[80];
while (err = GetCommError (watchfd, NULL))
{
fbb_warning (9, "Send error : ", err);
}
wsprintf (title, "Error watchdog %d", watch_option);
ShowError (title, "WriteComm :", nb);
return;
}
#endif
#endif
}
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