AXIOMTEK CAPA110, User Manual

Page: 69 / 71

Single Board Computer
distronik GmbH
https://www.distronik.de
out dx,al
mov dx,2Fh
mov al,02h
out dx,al
;Programming DIO as in/out.
mov dx,2Eh
mov al,0E0h
out dx,al
mov dx,2Fh
mov al,Nh ;If N=07h, DIO is programmed as 3 inputs
out dx,al ;and 5 outputs (see below Note1)
;Read digital input data.
mov dx,2Eh
mov al,0E1h
out dx,al
mov dx,2Fh ;If N=07h, bit0~2 represent DIO0~2,
in dx, al ;bit0~2 are DIO pin 0~2 state (1 High, 0 Low)
;(see below
Note2)
; Set DIO digital output pins’ value.
mov dx,2Eh
mov al,0E1h
out dx,al
mov dx,2Fh
mov al,M ;If N=07h, bit3~7 represent DIO3~7,
out dx,al ;set output value M
;bit3~7 are DIO pin 3~7 state (1 High, 0 Low)
;if M=FFh, all DIO pins are high
;(see below Note3)
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