Advantech PCM-3362 User Manual download pdf (Page 85)

77 PCM-3362 User Manual

Appendix D Watchdog Timer and GPIO sample code

END

D.2 GPIO sample code

;===============================================================

; Get Number of GPIO group

; one group mean 8 gpio pins (one GPIO Chip)

; Input:

; ax=5E87h

; bh=00h

; output:

; ax=5E78 ;function success, other value means function fail

; cl= n group of gpio

mov ax,5E87h

mov bh,00h

INT15

; You will get cl=01 in 8 bit GPIO product, cl = 02 in 16 bit GPIO product

;===============================================================

; Get GPIO Config

; Input:

; ax=5E87h

; bh=01h

; cl= n ; n means which group of GPIO you want to get

; output:

; ax=5E78 ;function success, other value means function fail

; bl= the n group of gpio config

; bit 0 = gpio 0 , 0 => output pin; 1 => input pin

; bit 1 = gpio 1 , 0 => output pin; 1 => input pin

; .....

; bit 7 = gpio 7 , 0 => output pin; 1 => input pin

mov ax,5E87h

mov bh,01h

mov cl,01h

INT15

; You will get GPIO default setting from bl

;===============================================================

; Set GPIO Config

; Input:

; ax=5E87h

; bh=02h

1 2 ... 80 81 82 83 84 85 86 87 88

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Advantech PCM-3362 User Manual Page 85