Aaeon PFM-LNP Bedienungsanleitung PDF herunterladen (Seite 38)

PC/104 CPU Module PFM-LNP

Appendix A Programming the Watchdog Timer A-4

The following is a sample code to set WDT for 3 seconds.

;Runtime register I/O base address

SUPERIO_GPIO_PORT EQU 600h

.MODEL SMALL

.CODE

begin:

;enable WDT

mov dx, SUPERIO_GPIO_PORT + 47h

mov al, 0Ch

out dx, al

;WDT_TIME_OUT register

mov dx, SUPERIO_GPIO_PORT + 65h

mov al, 80h ;unit is second

out dx, al

;WDT_VAL register

mov dx, SUPERIO_GPIO_PORT + 66h

mov al, 03h ;3 seconds

out dx, al

;exit

mov ah,4ch

int 21h

END begin

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