Ec Watchdog Timer Sample Code - Advantech MIOS-5250 User Manual

C.1

EC Watchdog Timer sample code

EC_Command_Port = 0x29Ah
EC_Data_Port = 0x299h
Write EC HW ram = 0x89
Watch dog event flag = 0x57
Watchdog reset delay time = 0x5E (high byte), 0x5F (low byte)
Reset event = 0x04
Start WDT function = 0x28
Stop WDT function = 0x29
Reset WDT function = 0x2A
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.model small
.486p
.stack 256
.data
.code
org 100h
.STARTup
mov dx, EC_Command_Port
mov al,89h ; Write EC HW ram.
out dx,al
mov dx, EC_Data_Port
mov al, 5Fh
base: 100ms
out dx,al
mov dx, EC_Data_Port
mov al, 64h ;Set 10 seconds delay time.
out dx,al
mov dx, EC_Command_Port
mov al,89h ; Write EC HW ram.
out dx,al
mov dx, EC_Data_Port
mov al, 57h ; Watch dog event flag.
out dx,al
mov dx, EC_Data_Port
mov al, 04h ; Reset event.
out dx,al
mov dx, EC_Command_Port
mov al,28h ; start WDT function. (Stop: 0x29, Reset: 0x2A)
out dx,al
MIOS-5250 User Manual
; Watchdog reset delay time low byte (5Eh is high byte) index, Time-
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