IBASE Technology SI-111-N, Руководство пользователя

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Appendix
SI-111-N User Manual 53
C. Watchdog Timer
The Watchdog Timer (WDT) is used to generate a variety of output signals after a
user programmable count. The WDT is suitable for the use in the prevention of
system lock-up, such as when software becomes trapped in a deadlock. Under these
sorts of circumstances, the timer will count to zero and the selected outputs will be
driven. Under normal circumstance, you will need to restart the WDT at regular
intervals before the timer counts to zero.
Sample Code:
//---------------------------------------------------------------------------
//
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
// PURPOSE.
//
//---------------------------------------------------------------------------
#include <dos.h>
#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
#include "F81804.H"
//---------------------------------------------------------------------------
int main (int argc, char *argv[]);
void EnableWDT(int);
void DisableWDT(void);
//---------------------------------------------------------------------------
int main (int argc, char *argv[])
{
unsigned char bBuf;
unsigned char bTime;
char **endptr;
char SIO;
printf("Fintek 81804 watch dog program\n");
SIO = Init_F81804();
if (SIO == 0)
{
printf("Can not detect Fintek 81804, program abort.\n");
return(1);
}//if (SIO == 0)
if (argc != 2)
{
printf(" Parameter incorrect!!\n");
return (1);
}
bTime = strtol (argv[1], endptr, 10);