AXIOMTEK CAPA55R, Руководство пользователя

Страница: 71 / 84

CAPA55R Capa Board
Digital I/O 65
Appendix B
Digital I/O
B.1 About Digital I/O
The onboard GPIO or digital I/O has 8 bits (DIO0~7). Each bit can be set to function as input or
output by software programming. In default, all pins are pulled high with +5V level (according
to main power). The BIOS default settings are 4 inputs and 4 outputs.
CN12
B.2 Digital I/O Programming
/////////////////////////////////////////////////////////////////////////////////////////
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <dos.h>
#define AXIOM_DIO_IN_OUT_ADDR0xFA31
#define AXIOM_DIO_HIGH_LOW_ADDR0xFA32
#define DIO_PIN1 BIT0
//correspondence to HW pin is GPI0
#define DIO_PIN2 BIT1 //correspondence to HW pin is GPI1
#define DIO_PIN3 BIT2 //correspondence to HW pin is GPI2
#define DIO_PIN4 BIT3 //correspondence to HW pin is GPI3
#define DIO_PIN5 BIT4 //correspondence to HW pin is GPO0
#define DIO_PIN6 BIT5 //correspondence to HW pin is GPO1
#define DIO_PIN7 BIT6 //correspondence to HW pin is GPO2
Pin Signal Pin Signal
1 DIO 0 6 DIO 5
2 DIO 1 7 DIO 6
3 DIO 2 8 DIO 7
4 DIO 3 9 +5V
5 DIO 4 10 GND