User`s manual

PCA-6190 User’s Manual 92
Appendix B Programming the GPIO
B.1 Sample Code
;------------------------------------------------------------
; MTEST1 _M_HL=05 GP10-13=GPO GP14-17=GPI
; _M_HL=50 GP10-13=GPI GP14-17=GPO
;------------------------------------------------------------
MTEST1 MACRO _M_HL
LOCAL _M_Begin,_M_END,_M_LOP1
_M_Begin:
MOV DX,2Eh ; 2E/2F=F1/05 (CR-F1)
MOV AL,0F1h ; =F1/50 (CR-F1)
OUT DX,AL ;-Index
MOV DX,2Fh ;
MOV al,_M_HL ;AL<--05/50
OUT DX,AL ;-Data
MOV DX,2Fh ;
IN AL,DX ;-Data
cmp al,55h ;
jz _M_LOP1 ;
jmp _M_Begin ;
_M_LOP1:
MOV DX,2Fh ;
MOV AL,_M_HL ;AL<-05/50
SHL AL,1 ;05/50 -->0A/A0
OUT DX,AL ;-Data
MOV DX,2Fh ;
IN AL,DX ;-Data
cmp al,0AAh ;
jz _M_END ;
jmp _M_Begin ;