參數(shù)資料
型號: PCM-5862E
廠商: Electronic Theatre Controls, Inc.
元件分類: 單板計算機
英文描述: All in one multi-media Pentium processor-based single board computer
中文描述: 所有在一個多媒體奔騰處理器的單板計算機
文件頁數(shù): 80/108頁
文件大?。?/td> 597K
代理商: PCM-5862E
PCM-5862E/EL User's Manual
72
Programming the Watchdog Timer
In order to program the watchdog timer, you must write a program
which writes I/O port address 443 (hex). The output data is a value of
time interval. The value range is from 01(hex) to 3F(hex), and the
related time interval is 1 sec. to 63 sec.
Data
01
02
03
04
Time Interval
1 sec.
2 sec.
3 sec.
4 sec.
.
.
.
63 sec.
3F
After data entry, your program must refresh the watchdog timer by
rewriting the I/O port 443 (hex) while simultaneously setting it. When
you want to disable the watchdog timer, your program should read I/O
port 443 (hex).
The following example shows how you might program the
watchdog timer in BASIC:
10
20
30
40
50
60
70
80
REM
Watchdog timer example program
OUT &H443, data REM
Start and restart the watchdog
GOSUB 1000 REM
Your
application task #1
OUT &H443, data REM
Reset the timer
GOSUB 2000 REM
Your
application task #2
OUT &H443, data REM
Reset the timer
X=INP (&H043) REM
Disable the watchdog timer
END
1000
REM
Subroutine #1, you application task
.
.
.
RETURN
REM
Subroutine #2, you application task
.
.
.
RETURN
1070
2000
2090
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PCM5862EL 制造商:未知廠家 制造商全稱:未知廠家 功能描述:All in one multi-media Pentium processor-based single board computer
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