Advantech PCM-3362 user manual Appendix D Watchdog Timer and Gpio sample code

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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

Appendix D Watchdog Timer and GPIO sample code

77 PCM-3362 User Manual