Norco BIS-6592LC, User Manual, Page: 77 / 83

BIS-6592LC
LED Screen Control Hardware Platform supporting 1080PHD Display
67
Appendix 2. Watchdog Programming Guide
watchdog reference code
（
ASM
）
--------------------------------------------------------------------------------------------------------------
Set the port to realize watchdog function through DEBUG order, so that it can carry out
Watchdog Timer
’
s various functions.
Port Instruction:
2EH
：
Address Register
2FH
：
Data Register
Example: Set Watchdog Timer for30 Seconds, DEBUG in DOS
：
C:\>debug
-o 2e 87
-o 2e 87 ;unlock
-o 2e 2d
-o 2f 20 ;bit0=0 ,set pin as watchdog func
-o 2e 07
-o 2f 08 ;select logic devices
-o 2e 30
-o 2f 01 ;activate logic devices
-o 2e f5
-o 2f 00 ; Set timer units as second / (set as min: o 2f 08)
-o 2e f6
-o 2f 30 ;Set Timer Count to 30h=48sec
-o 2e aa ;Lock register
-q
C:\>
-----------------------------------------------------------------
Input the last line of the instruction then press Enter, system will auto reboot within 48 seconds.
===========================================================
Reference code (c++ language)
：
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outputb (0x2e, 0x87)