Kontron KTA55-pITX Manual do Utilizador descarregar pdf (Página 18)

KTD-S0043-A Page 15 GPIO Interface

KTA55/pITX Software Guide

7 GPIO Interface

The GPIO part is a component of the AMD

Hudson-E1 Controller Hub. Each GPIO pin has its own control

are available - access to other GPIO pins is forbidden and can damage the board. Under a 16 bit environ-

ment register access is possible but very complex except you use the free Open Watcom C/C++ compiler

(example compiled with version 1.9).

The following picture shows the register structure (8 bit wide):

Open Watcom C/C++ compiler settings:

Target Environment: DOS - 32-bit

Image Type: PMODE/W Executable [.exe]

7.1 DOS Example

#include <stdio.h>

#include <conio.h>

#define u8 unsigned char

#define GPIO_BASE_ADDR 0xFED80100

#define MAX_GPIO 8

#define PU_SHIFT 3

#define PD_SHIFT 4

#define DIR_SHIFT 5

#define OUT_SHIFT 6

#define IN_SHIFT 7

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