Watchdog and Utilities
101
5
Watchdog and Utilities
5.1 Watchdog Timer Configuration
The Watch Dog Timer (WDT) can monitor the system's status.
Once the WDT receives a value, the timer will begin to count
down. Reprogramming a new value to WDT or moving the
keyboard can restart the WDT. If the system is idle or hang, it will
reboot when the timer time-out.
The function of the watchdog timer is to reset the system
automatically. It contains a one-second (or one-minute) resolution
down counter (in CRF2 of logical device 8 of super I/O chip) and
two Watchdog control registers (CRF4 and CRF3 of logical device
8).
We provide the WDT function calls for easy use under DOS,
Windows 95/98/2000, and Windows NT, please refer to the
information under
X:\CHIPDRV\WDT
.
WDT Programming
In order to simplify the programming code, a sub function is
provided for programmers to implement their software. For DOS,
Windows 95, or Windows 98, and Window NT, the sub function
format is as follows:
out_port (int IOport_number, int
Counter_value)
IOport_number:0x3F0 -->W83977EF's
configuration port.
0x2E -->W83627HF's configuration port.
Counter_value: 0 ~ 15300 (255 minutes)
(write a zero to disable the timer)
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Содержание NuIPC cPCI-6760D Series
Страница 5: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 87: ...74 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 99: ...86 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...