5 4
TPC-1260 User's Manual
B.1 Watchdog timer programming example
The watchdog timer built in the TPC-1260 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 Advantech Windows CE
for TPC-1260.
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
Summary of Contents for TPC-1260
Page 10: ......
Page 19: ...Chapter 1 General Information 9 Figure 1 8 1Exploded diagram 1 8 Exploded diagram ...
Page 31: ...Chapter 3 The Engine of the TPC 1260 21 Figure 3 3 2 TPC 1260 I O board LCD side ...
Page 33: ...4 Windows CE in the TPC 1260 C H A P T E R ...
Page 44: ...36 TPC 1260 User s Manual ...
Page 45: ...5 System Tuning C H A P T E R ...
Page 51: ...Chapter 5 System Tune Up 43 ...
Page 52: ...44 TPC 1260 User s Manual ...
Page 53: ...6 Maintenance C H A P T E R ...
Page 57: ...A A P P E N D I X Serial Port Settings ...
Page 59: ...Appendix A Watchdog Timer 51 A 2 Data Format RS 422 Control Settings On Off Default ...
Page 60: ...52 TPC 642 User s Manual ...
Page 61: ...B A P P E N D I X Watchdog Timer Programming Example ...
Page 63: ...C A P P E N D I X Windows 2000 Touch Screen Installation ...
Page 65: ...Appendix C Windows 2000 57 Step 3 Click the Device Manager button Figure C 2 Device manager ...