ROHS EmETXe-i9652, User Manual

Page: 76 / 80

Appendix
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mov ax,400h
mov dx,ax
mov al,0ffh
out dx,ax ; clear i2c bus status
mov ax,404h
mov dx,ax
mov al,06eh
out dx,ax ; Set I2C Device Address=6eh
mov ax,403h
mov dx,ax
mov al,020h
out dx,ax ;select GPIO 2 (index=20h)
mov ax,405h
mov dx,ax
mov al,0ffh
out dx,ax ;Set all GPIO 2 pin as output
mov ax,402h
mov dx,ax
mov al,048h
out dx,ax ;start write, active
;-------------------------------------------------------------
mov ax,402h
mov dx,ax
mov al,00h
out dx,al ; clear i2c bus
mov ax,400h
mov dx,ax
mov al,0ffh
out dx,ax ; clear i2c bus status
mov ax,404h
mov dx,ax
mov al,06eh
out dx,ax ; Set I2C Device Address=6eh
mov ax,403h
mov dx,ax
mov al,011h
out dx,ax ;select GPIO 1 data register (index=11h)