Acrosser AR-B1851 - Manual (Page 37)

AR-B1851 User’s Guide
AR-B1851 37
GPI Example Description
O 2E 87
;Extended Functions Enable Register
O 2E 87 ;Extended Functions Enable Register
O 2E 2A ;select CR2A
O 2F FC ;(Define the PINs as GPIO or Game
Port1)”FC”Pin121~128 set as GPIO
O 2E 07 ;EFIR=EFER(Extended Functions Index
Register)point to Logical Device Number Reg.
O 2F 07 ;EFDR=EFIR+1(select logical device 7,GPIO in
logical device7)
O 2E 30 ;select CR30(Active or inactive)
O 2F 01 ;set 01(Active) , 00(Inactive)
O 2E F0 ;select CRF0(Set the PINs be GPO or GPI
Funciton)
O 2F FF ;set the PINs be GPI
O 2E F1 ;select CRF1(Set the PINs be Read only)
I 2F ;Show the PINs Value
Q ;Quit debug