Appendix C Digital I/O; About Digital I/O; Sample Program - AXIOMTEK CAPA830 User Manual

About Digital I/O

The onboard digital I/O has 8 bits (DI0~2 and DO0~4). In default, all pins are pulled high with
+3.3V level (according to main power). The BIOS default settings are 3 inputs and 5 outputs
where all of these pins are set to 1. Use these GPIO signals to control cash drawers and sense
warning signals from an Uninterrupted Power System (UPS), or perform store security control

Sample Program

Programming sample code :
/*---------------- INCLUDE FILE ---------------------*/
#include <stdio.h>
#include <conio.h>
#include <bios.h>
#include <dos.h>
#define UCHAR unsigned char
#define UINT unsigned int
#define SMIOBASE
/*****************
SMIOBASE can get from PCI device Bus-0,Device-31, Function-3
Register 20h~23h, the value is the IO base address.
******************/
#define SM_REG
#define SM_ADDR
#define SM_DATA
#define SM_CMD
#define SM_STATUS
#define SM_byteAccess 0x48
#define Device_Addr
UCHAR _read_smbus(UCHAR ,UCHAR);
void _write_smbus(UCHAR,UCHAR, UCHAR);
#define F75111_CHIPID
#define F75111_VENDORID
Digital I/O
®
CAPA830 Intel Atom
0xF000
(SMIOBASE+3)
(SMIOBASE+4)
(SMIOBASE+5)
(SMIOBASE+2)
(SMIOBASE+0)
0x9C /*depend on hardware designed Low:0x9C, High:0x6E*/
0x0003
0x3419
TM
D2550/N2800/N2600 Processor 3.5" SBC
Appendix C
Digital I/O
Pin Signal
1 DI0 (Bit0)
3 DI1 (Bit1)
5 DI2 (Bit2)
7 GND
9 GND
CN2
Pin Signal
2 DO0 (Bit 0)
4 DO1 (Bit 1)
6 DO2 (Bit 2)
8 DO3 (Bit 3)
10 DO4 (Bit 4)
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