Advantech PCA-6763, User Manual

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PCA-6763 User Manual 80
C.1 Supported GPIO Register
Below are the detailed descriptions of the GPIO addresses and a programming sam-
ple.
C.2 GPIO Registers
C.3 GPIO Example Program-1
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Enter the extended function mode, interruptible double-write
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MOV DX,2EH
MOV AL,87H
OUT DX,AL
OUT DX,AL
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Configure logical device, configuration register CRE0,CRE1,CRE2
---------------------------------------------------------------
MOV DX,2EH
MOV AL,09H
OUT DX,AC
DEC DX
MOV AL,30H
OUT DX,AL
INC DX
IN AL,DX
OR AL,10000000B
DEC DX
MOV AL,07H
OUT DX,AL
Bank Offset Description
09h 30h Write 1 to bit 7 to enable GPIO
07h E0h
GPIO I/O Register
When set to a '1', respective GPIO port is pro-
grammed as an input port.
When set to a '0', respective GPIO port is pro-
grammed as an output port.
07h E1h
GPIO Data Register
If a port is programmed to be an output port, then
its respective bit can be read/written.
If a port is programmed to be an input port, then its
respective bit can only be read.
07h E2h
GPIO Inversion Register
When set to a '1', the incoming/outgoing port value
is inverted.
When set to a '0', the incoming/outgoing port value
is the same as in data register.