Advantech AIMB-215 B1, Руководство пользователя

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93 AIMB-215 B1 User Manual
Appendix A
P
rogramming
the
W
atchdog
Timer
A.1.3 Example Program
1. Enable the watchdog timer and set the timeout interval as 10 seconds
;-----------------------------------------------------------
Mov dx,2eh; unlock NCT6106D
Mov al,87h
Out dx,al
Out dx,al
;-----------------------------------------------------------
Mov al,07h; select the watchdog timer registers
Out dx,al
Inc dx
Mov al,08h
Out dx,al
;-----------------------------------------------------------
Dec dx; enable the watchdog timer function
Mov al,30h
Out dx,al
Inc dx
Mov al,01h
Out dx,al
;-----------------------------------------------------------
Dec dx; set the unit of measurement as seconds
Mov al,0f0h
Out dx,al
Inc dx
In al,dx
And al,not 08h
Out dx,al
;-----------------------------------------------------------
Dec dx; set the timeout interval as 10 seconds and start counting
Mov al,0f1h
Out dx,al
Inc dx
Mov al,10
Out dx,al
;-----------------------------------------------------------
Dec dx; lock NCT6106D
Mov al,0aah
Out dx,al
2. Enable the watchdog timer and set the timeout interval as 5 minutes
;-----------------------------------------------------------
Mov dx,2eh; unlock NCT6106D
Mov al,87h
Out dx,al
Out dx,al