Advantech MIO-5270 User Manual download pdf (Page 72)

MIO-5270 User Manual 62

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

Reset event = 0x04

Start WDT function = 0x28

====================================================

.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_Command_Port

mov al, 5Fh ; Watchdog reset delay time low byte (5Eh is high byte) index.

out dx,al

mov dx, EC_Data_Port

mov al, 30h ;Set 3 seconds delay time.

out dx,al

mov dx, EC_Command_Port

mov al,89h ; Write EC HW ram.

out dx,al

mov dx, EC_Command_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.

out dx,al

exit

END

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Advantech MIO-5270 User Manual Page 72