Gpio Sample Code - MSI MS-98I8 Manual

GPIO Sample Code


GPI 0 ~ GPI 3
GPI 0
IO Address
SIO GPIO Register 8Ah
Bit 0
Sample code #1

GPO 0 ~ GPO 3
GPO 0
IO Address
SIO GPIO Register 89h
Bit 4
Sample code #2
SIO_INDEX_Port
SIO_DATA_Port
SIO_UnLock_Value
SIO_Lock_Value
SIO_LDN_GPIO
SIO_GPIO_Data
SIO_GPIO_Status
GPI_0
GPO_0
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
jmp short $+2
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
GPI 1 GPI 2 GPI 3
8Ah 8Ah 8Ah
1 2 3
GPO 1 GPO 2 GPO 3
89h 89h 89h
5 6 7
equ 04Eh
equ 04Fh
equ 087h
equ 0AAh
equ 06h
equ 089h
equ 08Ah
equ 00000001b
equ 00010000b
;Io_delay
;Io_delay
MS-98I8
A-3