ROHS EmETXe-i9652, Руководство пользователя

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Appendix
- 71 -
Below are the source codes written in assembly & C, please take them
for Digital I/O application examples. The default I/O address is 6Eh.
Assembly Code
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,010h
out dx,ax ;select GPIO 1 (index=10h)
mov ax,405h
mov dx,ax
mov al,0ffh
out dx,ax ;Set all GPIO 1 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
Appendix D: Digital I/O Setting