C&T PC311E, Руководство пользователя

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PC300 / PC311E(P) l User’s Manual
72
GPIO Sample Code
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GPI 0 ~ GPI 3

GPO 0 ~ GPO 3
GPI_REG equ 0A03h
GPO_REG equ 0A02h
GPO_0 equ 00010000b
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Sample Code:
#1 : Get GPI 0 status
; Get GPI 0 Pin Status Register
In al, GPI_REG
;al bit4 = GPI 0 status
#2 : Set GPO 0 status to high
; Set GPO 0 Pin to High
mov dx, GPO_REG
in al, dx
or al, GPO_0
out dx, al
;al bit0 = GPO 0 status
Appendix – WDT & GPIO
GPI 0 GPI 1 GPI 2 GPI 3
IO Address 0xA03h 0xA03h 0xA03h 0xA03h
Bit 4 5 6 7
Sample code #1
GPO 0 GPO 1 GPO 2 GPO 3
IO Address 0xA02h 0xA02h 0xA02h 0xA02h
Bit 0 1 2 3
Sample code #2