ROHS ITX-i2705, User Manual

Page: 83 / 84

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Appendix
- 76 -
C language Code
/*----- Include Header Area -----*/
#include "math.h"
#include "stdio.h"
#include "dos.h"
/*----- routing, sub-routing -----*/
void main()
{
outportb(0x2e, 0x87); /* initial IO port twice */
outportb(0x2e, 0x87);
outportb(0x2e, 0x2a); /* Select CR2A */
outportb(0x2e+1, 0xfc); /* set CR2A bit7=1 as GPIO port 1*/
outportb(0x2e, 0x07); /* point to logical device */
outportb(0x2e+1, 0x07); /* select logical device 7 */
outportb(0x2e, 0x30); /* select CR30 */
outportb(0x2e+1, 0x01); /* set bit0=1, GPIO port 1 active */
outportb(0x2e, 0xf0); /* select CRF0, GP I/O select */
outportb(0x2e+1, 0x00); /* bit7~bit0 0:output 1:input */
outportb(0x2e, 0xf1); /* select CRF1, Data Register */
outportb(0x2e+1, 0xff); /* set all GPIO pin output 1 */
outportb(0x2e, 0xf1); /* select CRF1, Data Register */
outportb(0x2e+1, 0x00); /* set all GPIO pin output 0 */
outportb(0x2e, 0xAA); /* stop program W83627HF, Exit */
}