A.1.2 GPIO Example program-1
Enter the extended function mode, interruptible
MOV DX,2EH
MOV AL,87H
OUT DX,AL
OUT DX,AL
Configure logical device 7(GP10~GP17), configuration register CRF0,CRF1,CRF2
MOV DX,2EH
MOV AL,07H ; point to Logical Device Number Reg.
OUT DX,AL
MOV DX,2FH
MOV AL,07H ; select logical device 7 OUT DX,AL ;
MOV DX,2EH
MOV AL,F0
OUT DX,AL
MOV DX,2FH
MOV AL,00H ; 01:Input 00:output for GP10~GP17
OUT DX,AL
MOV DX,2EH
MOV AL,F2H ;
OUT DX,AL
MOV DX,2FH
MOV AL,00H ;Set GPIO is normal not inverter OUT DX,AL;
MOV DX,2EH
MOV AL,F1H
55 | AppendixA |
