MSI MS-98F6 - GPIO Sample Code

A-3
WDT & GPIO MS-98F6
GPIO Sample Code
 GPI 0 ~ GPI 3
GPI 0
GPI 1
GPI 2
GPI 3
IO Address
SIO GPIO Register
82h 82h 82h 82h
Bit 0 1 2 3
Sample code #1
 GPO 0 ~ GPO 3
GPO 0
GPO 1
GPO 2
GPO 3
IO Address
SIO GPIO Register
81h 81h 81h 81h
Bit 4 5 6 7
Sample code #2
SIO_INDEX_Port equ 04Eh
SIO_DATA_Port equ 04Fh
SIO_UnLock_Value equ 087h
SIO_Lock_Value equ 0AAh
SIO_LDN_GPIO equ 06h
GPI_REG equ 082h
GPO_REG equ 081h
GPI_ADD equ 000h
GPO_ADD equ 000h
GPO_0 equ 00010000b
Sample Code:
#1 : Get GPI 0 status
;
Enable config mode
mov dx, SIO_INDEX_Port
mov al, SIO_UnLock_Value
out dx, al
jmp short $+2 ;Io_delay
jmp short $+2 ;Io_delay
out dx, al
; Switch GPIO Configuration for SIO LDN 0x06
mov dx, SIO_INDEX_Port
mov al, 07h
out dx, al
mov dx, SIO_DATA_Port
mov al, SIO_LDN_GPIO
out dx, al
; Get GPI 0 Pin Status Register
mov dx, SIO_INDEX_Port
mov al, GPI_REG
out dx, al
mov dx, SIO_DATA_Port
in al, dx
;al bit0 = GPI 0 status
; Exit SIO
mov dx, SIO_INDEX_Port
mov al, SIO_Lock_Value
out dx, al
#2 : Set GPO 0 status to high
; Enable config mode
mov dx, SIO_INDEX_Port
mov al, SIO_UnLock_Value
out dx, al
jmp short $+2 ;Io_delay
jmp short $+2 ;Io_delay
out dx, al
; Switch GPIO Configuration for SIO LDN 0x06
mov dx, SIO_INDEX_Port
mov al, 07h
out dx, al
mov dx, SIO_DATA_Port
mov al, SIO_LDN_GPIO
out dx, al
; Set GPO 0 Pin to High
mov dx, SIO_INDEX_Port
mov al, GPO_REG
out dx, al
mov dx, SIO_DATA_Port
in al, dx
or al, GPO_0