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case WDT_FROM_SLEEP:
case WDT_TIMEOUT:
handle_error();
}
Example
Files:
Also See:
ex_wdt.c
restart_wdt(), reset_cpu()
restart_wdt( )
Syntax:
Parameters:
Returns:
Function:
restart_wdt()
None
undefined
Restarts the watchdog timer. If the watchdog timer is enabled, this
must be called periodically to prevent the processor from resetting.
The watchdog timer is used to cause a hardware reset if the
software appears to be stuck.
The timer must be enabled, the timeout time set and software must
periodically restart the timer. These are done differently on the
PCB/PCM and PCH parts as follows:
PCB/PCM
Enable/Disable#fuses
PCH
setup_wdt()
Timeout time setup_wdt() #fuses
restart
restart_wdt()restart_wdt()
Availability:
Requires:
All devices
#FUSES
Examples:
#fuses WDT
// PCB/PCM example
// See setup_wdt for a
// PIC18 example
main() {
setup_wdt(WDT_2304MS);
while (TRUE) {
restart_wdt();
perform_activity();
}
}
238
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