Gpio Sample Code - MSI MS-98H9 Manual

GPIO Sample Code


GPI 0 ~ GPI 3
GPI 0
IO Address F040h
Slave Address 9Ch
SIO GPIO Register 42h
Bit 1
Sample code #1

GPO 0 ~ GPO 3
GPO 0
IO Address F040h
Slave Address 9Ch
SIO GPIO Register 22h
Bit 4
Sample code #2
SMBUS_BASE_ADDRESS
SLAVEADDRESS
GPI0_REG
GPO0_REG
GPO0_Value
Sample Code:
#1 : Get GPI 0 status
mov dx, GPI0_REG
in al, dx
#2 : Set GPO 0 status to high
mov dx, GPO0_REG
in al, dx
and al, not GPO0_Value
or al, GPO0_Value
out dx, al
GPI 1 GPI 2 GPI 3
F040h F040h F040h
9Ch 9Ch 9Ch
42h 42h 22h
2 3 3
#1 #1 #1
GPO 1 GPO 2 GPO 3
F040h F040h F040h
9Ch 9Ch 9Ch
22h 22h 22h
5 6 7
#2 #2 #2
equ F040h ;IO Address
equ 9Ch ;Slave Address
equ 42h
equ 22h
equ 00010000b
;al bit0 = GPI 0 status
;al bit4 = GPO 0 status
MS-98H9
A-3