AMI MI982, Руководство пользователя

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APPENDIX
64 MI982 User’s Manual
C. Watchdog Timer Configuration
The WDT is used to generate a variety of output signals after a user
programmable count. The WDT is suitable for 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, the user will
restart the WDT at regular intervals before the timer counts to zero.
SAMPLE CODE:
//---------------------------------------------------------------------------
//
// T HIS CODE AND INFORMAT ION IS PROVIDED "AS IS" WIT HOUT WARRANT Y OF ANY
// KIND, EIT HER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMIT ED T O T HE
// IMPLIED WARRANT IES OF MERCHANT ABILIT Y AND/OR FIT NESS FOR A PART ICULAR
// PURPOSE.
//
//---------------------------------------------------------------------------
#include <dos.h>
#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
#include "F81866.H"
//---------------------------------------------------------------------------
int main (int argc, char *argv[]);
void EnableWDT (int);
void DisableWDT (void);
//---------------------------------------------------------------------------
int main (int argc, char *argv[])
{
unsigned char bBuf;
unsigned char bT ime;
char **endptr;
char SIO;
printf("Fintek 81866 watch dog program \n");
SIO = Init_F81866();
if (SIO == 0)
{
printf("Can not detect Fintek 81866, program abort. \n");
return(1);
}//if (SIO == 0)
if (argc != 2)
{
printf(" Parameter incorrect!!\n");
return (1);
}
bT ime = strtol (argv[1], endptr, 10);
printf("System will reset after %d seconds\n", bT ime);
if (bT ime)
{ EnableWDT (bT ime); }
else
{ DisableWDT (); }