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GOT-1120T User's Manual
B.1 Watchdog timer programming example
The watchdog timer built in the GOT-1120T is a useful aid to reduce
system down time-especially for those operating systems not reliable
enough. There is a counter inside the watchdog timer. If the system
does not constantly clear the counter within the timeout period, the
watchdog timer would initialize a system reset.
The following example program in assembly language gives hint to
utilize the watchdog timer under operating systems such as DOS,
Windows 9x/NT, etc.
Step 1: activate the watchdog timer
Step 2: clear the watchdog timer
Step 3: re-trigger the watchdog timer
If the timer will not count the GP07 is kept high. To re-trigger the watch-
dog timer:
Notice:
the utility to enable/disable the watchdog timer under
Windows CE is built in the AXIOMTEK Windows CE
for GOT-1120T.
mov
dx, 404Ch
in
al, dx
and
al, NOT 80h
; GPO7 to low
out
dx, al
mov
dx, 404Ch
in
al, dx
or
al, 80h
; GPO7 to high
out
dx, al
mov
dx, 404Ch
in
al, dx
and
al, NOT 80h
; GPO7 to low
out
dx, al
Содержание GOT-1120T
Страница 1: ...GOT 1120T Fanless Touch Panel Computer with 12 1 TFT LCD User s Manual...
Страница 10: ......
Страница 19: ...Chapter 1 General Information 9 Figure 1 8 1Exploded diagram 1 8 Exploded diagram...
Страница 26: ...16 GOT 1120T User s Manual...
Страница 30: ...20 GOT 1120T User s Manual 3 3 GOT 1120T I O board Figure 3 3 1 GOT 1120T I O board I O port side...
Страница 31: ...Chapter 3 The Engine of the GOT 1120T 21 Figure 3 3 2 GOT 1120T I O board LCD side...
Страница 33: ...4 System Tuning C H A P T E R...
Страница 36: ...26 GOT 1120T User s Manual...
Страница 37: ...5 Maintenance C H A P T E R...
Страница 41: ...A A P P E N D I X Serial Port Settings...
Страница 43: ...Appendix A Watchdog Timer 33 A 2 Data Format RS 422 Control Settings On Off Default...
Страница 44: ...34 GOT 1120T User s Manual...
Страница 45: ...B A P P E N D I X Watchdog Timer Programming Example...
Страница 47: ...C A P P E N D I X Windows 2000 XP Touch Screen Installation...
Страница 49: ...Appendix C Windows 2000 39 Step 3 Click the Device Manager button Figure C 2 Device manager...
Страница 57: ...D A P P E N D I X Fuse Specifications...