Contec bx200 SERIES, User Manual

Page: 49 / 115

4. Each Component Function
42
BX-2x0-DCxxxx, BX-2x0D-DCxxxx User’s manual
MOV DX,2A0H
IN AL,DX ;Command success if AL = 90H
CHK_DI3:
MOV
DX,2A4H
IN AL,DX
TEST AL,1 ;Check status of input
JZ CHK_DI3
MOV DX,2A0H
IN AL,DX ;AL is DI data(3bit LSB)
;-------------------------------------------
;Digital Output
;-------------------------------------------
CHK_DO1:
MOV
DX,2A4H
IN AL,DX
TEST AL,2 ;Check status of output
JNZ CHK_DO1
MOV DX,2A0H
MOV AL,91H ;Write DIO Command
OUT DX,AL
CHK_DO2:
MOV
DX,2A4H
IN AL,DX
TEST AL,2 ;Check status of output
JNZ CHK_DO2
MOV DX,2A0H
MOV AL,07H ;DO Output Data (Example: 07H)
OUT DX,AL
CHK_DO3:
MOV
DX,2A4H
IN AL,DX
TEST AL,1 ;Check status of input
JZ CHK_DO3
MOV DX,2A0H
IN AL,DX ;Command success if AL = 91H
;-------------------------------------------
;Close
;-------------------------------------------
CHK_CLOSE1:
MOV
DX,2A4H
IN AL,DX
TEST AL,2 ;Check status of output
JNZ CHK_CLOSE1
MOV DX,2A0H
MOV AL,AAH ;Close Command
OUT DX,AL