C&T Solution RCO-6000, User Manual

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RCO-6000 l User’s Manual
113
WDT Sample Code
SIO_INDEX_Port equ 02Eh
SIO_DATA_Port equ 02Fh
SIO_UnLock_Value equ 087h
SIO_Lock_Value equ 0AAh
WatchDog_LDN equ 008h
WDT_UNIT equ 00h ; 00h=second, 80h=minute,
WDT_Timer equ 30 ; ex. 30 seconds
Sample code:
;Enable config mode
mov dx, SIO_INDEX_Port
mov al, SIO_UnLock_Value
out dx, al
jmp short $+2 ;Io_delay
jmp short $+2 ;Io_delay
out dx, al
;Change to WDT
mov dx, SIO_INDEX_Port
mov al, 07h
out dx, al
mov dx, SIO_DATA_Port
mov al, WatchDog_LDN
out dx, al
;Acive WDT
mov dx, SIO_INDEX_Port
mov al, 30h
out dx, al
mov dx, SIO_DATA_Port
in al, dx
or al, 01h
out dx, al
;set UNIT
mov dx, SIO_INDEX_Port
mov al, 0F0h
out dx, al
mov dx, SIO_DATA_Port
in al, dx
and al,0f4h ; clear "Select Watchdog Timer I count mode”
or al, 02h ; Enable the rising edge of a KBC reset (P20) to issue a time-out event.
or al, WDT_UNIT
out dx, al
;set timer
mov dx, SIO_INDEX_Port
mov al, 0F1h
out dx, al
mov dx, SIO_DATA_Port
mov al, WDT_Timer
out dx, al
;close config mode
mov dx, SIO_INDEX_Port
mov al, SIO_Lock_Value
out dx, al
Appendix – WDT & GPIO